Create the Goanna Runtime Environment

617 files changed, 28165 insertions, 0 deletions

diff --git a/dom/webidl/APZTestData.webidl b/dom/webidl/APZTestData.webidl
new file mode 100644
index 000000000..227f4b0b9
--- /dev/null
+++ b/dom/webidl/APZTestData.webidl
@@ -0,0 +1,47 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * This file declares data structures used to communicate data logged by
+ * various components for the purpose of APZ testing (see bug 961289 and 
+ * gfx/layers/apz/test/APZTestData.h) to JS test code.
+ */
+
+// A single key-value pair in the data.
+dictionary ScrollFrameDataEntry {
+  DOMString key;
+  DOMString value;
+};
+
+// All the key-value pairs associated with a given scrollable frame.
+// The scrollable frame is identified by a scroll id.
+dictionary ScrollFrameData {
+  unsigned long long scrollId;
+  sequence<ScrollFrameDataEntry> entries;
+};
+
+// All the scrollable frames associated with a given paint or repaint request.
+// The paint or repaint request is identified by a sequence number.
+dictionary APZBucket {
+  unsigned long sequenceNumber;
+  sequence<ScrollFrameData> scrollFrames;
+};
+
+// All the paints and repaint requests. This is the top-level data structure.
+dictionary APZTestData {
+  sequence<APZBucket> paints;
+  sequence<APZBucket> repaintRequests;
+};
+
+// A frame uniformity measurement for every scrollable layer
+dictionary FrameUniformity {
+  unsigned long layerAddress;
+  float frameUniformity;
+};
+
+dictionary FrameUniformityResults {
+  sequence<FrameUniformity> layerUniformities;
+};
diff --git a/dom/webidl/AbortController.webidl b/dom/webidl/AbortController.webidl
new file mode 100644
index 000000000..4e9124075
--- /dev/null
+++ b/dom/webidl/AbortController.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(), Exposed=(Window,Worker),
+ Func="AbortController::IsEnabled"]
+interface AbortController {
+  readonly attribute AbortSignal signal;
+
+  void abort();
+};
diff --git a/dom/webidl/AbortSignal.webidl b/dom/webidl/AbortSignal.webidl
new file mode 100644
index 000000000..b4b03bb7e
--- /dev/null
+++ b/dom/webidl/AbortSignal.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Exposed=(Window,Worker),
+ Func="AbortController::IsEnabled"]
+interface AbortSignal : EventTarget {
+  readonly attribute boolean aborted;
+
+  attribute EventHandler onabort;
+};
diff --git a/dom/webidl/AbstractWorker.webidl b/dom/webidl/AbstractWorker.webidl
new file mode 100644
index 000000000..7ea6e367b
--- /dev/null
+++ b/dom/webidl/AbstractWorker.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[NoInterfaceObject, Exposed=(Window,Worker,System)]
+interface AbstractWorker {
+    attribute EventHandler onerror;
+};
diff --git a/dom/webidl/AccessibleNode.webidl b/dom/webidl/AccessibleNode.webidl
new file mode 100644
index 000000000..42bc93aa9
--- /dev/null
+++ b/dom/webidl/AccessibleNode.webidl
@@ -0,0 +1,11 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="accessibility.AOM.enabled"]
+interface AccessibleNode {
+  readonly attribute DOMString role;
+  readonly attribute Node? DOMNode;
+};
diff --git a/dom/webidl/AnalyserNode.webidl b/dom/webidl/AnalyserNode.webidl
new file mode 100644
index 000000000..5b4be8822
--- /dev/null
+++ b/dom/webidl/AnalyserNode.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AnalyserNode : AudioNode {
+
+    // Real-time frequency-domain data
+    void getFloatFrequencyData(Float32Array array);
+    void getByteFrequencyData(Uint8Array array);
+
+    // Real-time waveform data
+    void getFloatTimeDomainData(Float32Array array);
+    void getByteTimeDomainData(Uint8Array array);
+
+    [SetterThrows, Pure]
+    attribute unsigned long fftSize;
+    [Pure]
+    readonly attribute unsigned long frequencyBinCount;
+
+    [SetterThrows, Pure]
+    attribute double minDecibels;
+    [SetterThrows, Pure]
+    attribute double maxDecibels;
+
+    [SetterThrows, Pure]
+    attribute double smoothingTimeConstant;
+
+};
+
+// Mozilla extension
+AnalyserNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Animatable.webidl b/dom/webidl/Animatable.webidl
new file mode 100644
index 000000000..decc13960
--- /dev/null
+++ b/dom/webidl/Animatable.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/web-animations/#the-animatable-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary KeyframeAnimationOptions : KeyframeEffectOptions {
+  DOMString id = "";
+};
+
+dictionary AnimationFilter {
+  boolean subtree = false;
+};
+
+[NoInterfaceObject]
+interface Animatable {
+  [Func="nsDocument::IsElementAnimateEnabled", Throws]
+  Animation animate(object? keyframes,
+                    optional UnrestrictedDoubleOrKeyframeAnimationOptions options);
+  [Func="nsDocument::IsWebAnimationsGetAnimationsEnabled"]
+  sequence<Animation> getAnimations(optional AnimationFilter filter);
+};
diff --git a/dom/webidl/Animation.webidl b/dom/webidl/Animation.webidl
new file mode 100644
index 000000000..9fdea5ade
--- /dev/null
+++ b/dom/webidl/Animation.webidl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/web-animations/#the-animation-interface
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum AnimationPlayState { "idle", "pending", "running", "paused", "finished" };
+
+[Func="nsDocument::IsElementAnimateEnabled",
+ Constructor (optional AnimationEffectReadOnly? effect = null,
+              optional AnimationTimeline? timeline)]
+interface Animation : EventTarget {
+  attribute DOMString id;
+  [Func="nsDocument::IsWebAnimationsEnabled", Pure]
+  attribute AnimationEffectReadOnly? effect;
+  [Func="nsDocument::AreWebAnimationsTimelinesEnabled"]
+  attribute AnimationTimeline? timeline;
+  [BinaryName="startTimeAsDouble"]
+  attribute double? startTime;
+  [SetterThrows, BinaryName="currentTimeAsDouble"]
+  attribute double? currentTime;
+
+           attribute double             playbackRate;
+  [BinaryName="playStateFromJS"]
+  readonly attribute AnimationPlayState playState;
+  [Func="nsDocument::IsWebAnimationsEnabled", Throws]
+  readonly attribute Promise<Animation> ready;
+  [Func="nsDocument::IsWebAnimationsEnabled", Throws]
+  readonly attribute Promise<Animation> finished;
+           attribute EventHandler       onfinish;
+           attribute EventHandler       oncancel;
+  void cancel ();
+  [Throws]
+  void finish ();
+  [Throws, BinaryName="playFromJS"]
+  void play ();
+  [Throws, BinaryName="pauseFromJS"]
+  void pause ();
+  [Throws]
+  void reverse ();
+};
+
+// Non-standard extensions
+partial interface Animation {
+  [ChromeOnly] readonly attribute boolean isRunningOnCompositor;
+};
diff --git a/dom/webidl/AnimationEffectReadOnly.webidl b/dom/webidl/AnimationEffectReadOnly.webidl
new file mode 100644
index 000000000..063cce1f8
--- /dev/null
+++ b/dom/webidl/AnimationEffectReadOnly.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/web-animations/#animationeffectreadonly
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum FillMode {
+  "none",
+  "forwards",
+  "backwards",
+  "both",
+  "auto"
+};
+
+enum PlaybackDirection {
+  "normal",
+  "reverse",
+  "alternate",
+  "alternate-reverse"
+};
+
+dictionary AnimationEffectTimingProperties {
+  double                              delay = 0.0;
+  double                              endDelay = 0.0;
+  FillMode                            fill = "auto";
+  double                              iterationStart = 0.0;
+  unrestricted double                 iterations = 1.0;
+  (unrestricted double or DOMString)  duration = "auto";
+  PlaybackDirection                   direction = "normal";
+  DOMString                           easing = "linear";
+};
+
+dictionary ComputedTimingProperties : AnimationEffectTimingProperties {
+  unrestricted double   endTime = 0.0;
+  unrestricted double   activeDuration = 0.0;
+  double?               localTime = null;
+  double?               progress = null;
+  unrestricted double?  currentIteration = null;
+};
+
+[Func="nsDocument::IsWebAnimationsEnabled"]
+interface AnimationEffectReadOnly {
+  [Cached, Constant]
+  readonly attribute AnimationEffectTimingReadOnly timing;
+  [BinaryName="getComputedTimingAsDict"]
+  ComputedTimingProperties getComputedTiming();
+};
diff --git a/dom/webidl/AnimationEffectTiming.webidl b/dom/webidl/AnimationEffectTiming.webidl
new file mode 100644
index 000000000..c2d8564c7
--- /dev/null
+++ b/dom/webidl/AnimationEffectTiming.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#animationeffecttiming
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::IsWebAnimationsEnabled"]
+interface AnimationEffectTiming : AnimationEffectTimingReadOnly {
+  inherit attribute double                             delay;
+  inherit attribute double                             endDelay;
+  inherit attribute FillMode                           fill;
+  [SetterThrows]
+  inherit attribute double                             iterationStart;
+  [SetterThrows]
+  inherit attribute unrestricted double                iterations;
+  [SetterThrows]
+  inherit attribute (unrestricted double or DOMString) duration;
+  inherit attribute PlaybackDirection                  direction;
+  [SetterThrows]
+  inherit attribute DOMString                          easing;
+};
diff --git a/dom/webidl/AnimationEffectTimingReadOnly.webidl b/dom/webidl/AnimationEffectTimingReadOnly.webidl
new file mode 100644
index 000000000..4aff51e01
--- /dev/null
+++ b/dom/webidl/AnimationEffectTimingReadOnly.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#animationeffecttimingreadonly
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::IsWebAnimationsEnabled"]
+interface AnimationEffectTimingReadOnly {
+  readonly attribute double                             delay;
+  readonly attribute double                             endDelay;
+  readonly attribute FillMode                           fill;
+  readonly attribute double                             iterationStart;
+  readonly attribute unrestricted double                iterations;
+  readonly attribute (unrestricted double or DOMString) duration;
+  readonly attribute PlaybackDirection                  direction;
+  readonly attribute DOMString                          easing;
+};
diff --git a/dom/webidl/AnimationEvent.webidl b/dom/webidl/AnimationEvent.webidl
new file mode 100644
index 000000000..e48ed571c
--- /dev/null
+++ b/dom/webidl/AnimationEvent.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/css3-animations/#animation-events-
+ * http://dev.w3.org/csswg/css3-animations/#animation-events-
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional AnimationEventInit eventInitDict)]
+interface AnimationEvent : Event {
+  readonly attribute DOMString animationName;
+  readonly attribute float     elapsedTime;
+  readonly attribute DOMString pseudoElement;
+};
+
+dictionary AnimationEventInit : EventInit {
+  DOMString animationName = "";
+  float elapsedTime = 0;
+  DOMString pseudoElement = "";
+};
diff --git a/dom/webidl/AnimationPlaybackEvent.webidl b/dom/webidl/AnimationPlaybackEvent.webidl
new file mode 100644
index 000000000..52f5f501a
--- /dev/null
+++ b/dom/webidl/AnimationPlaybackEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/web-animations/#the-animationplaybackevent-interface
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::IsWebAnimationsEnabled",
+ Constructor(DOMString type,
+             optional AnimationPlaybackEventInit eventInitDict)]
+interface AnimationPlaybackEvent : Event {
+  readonly attribute double? currentTime;
+  readonly attribute double? timelineTime;
+};
+
+dictionary AnimationPlaybackEventInit : EventInit {
+  double? currentTime = null;
+  double? timelineTime = null;
+};
diff --git a/dom/webidl/AnimationTimeline.webidl b/dom/webidl/AnimationTimeline.webidl
new file mode 100644
index 000000000..4cf5567ce
--- /dev/null
+++ b/dom/webidl/AnimationTimeline.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#animationtimeline
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::AreWebAnimationsTimelinesEnabled"]
+interface AnimationTimeline {
+  [BinaryName="currentTimeAsDouble"]
+  readonly attribute double? currentTime;
+};
diff --git a/dom/webidl/AnonymousContent.webidl b/dom/webidl/AnonymousContent.webidl
new file mode 100644
index 000000000..8be69cd26
--- /dev/null
+++ b/dom/webidl/AnonymousContent.webidl
@@ -0,0 +1,88 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * This file declares the AnonymousContent interface which is used to
+ * manipulate content that has been inserted into the document's canvasFrame
+ * anonymous container.
+ * See Document.insertAnonymousContent.
+ *
+ * This API never returns a reference to the actual inserted DOM node on
+ * purpose. This is to make sure the content cannot be randomly changed and the
+ * DOM cannot be traversed from the node, so that Gecko can remain in control of
+ * the inserted content.
+ */
+
+[ChromeOnly]
+interface AnonymousContent {
+  /**
+   * Get the text content of an element inside this custom anonymous content.
+   */
+  [Throws]
+  DOMString getTextContentForElement(DOMString elementId);
+
+  /**
+   * Set the text content of an element inside this custom anonymous content.
+   */
+  [Throws]
+  void setTextContentForElement(DOMString elementId, DOMString text);
+
+  /**
+   * Get the value of an attribute of an element inside this custom anonymous
+   * content.
+   */
+  [Throws]
+  DOMString? getAttributeForElement(DOMString elementId,
+                                    DOMString attributeName);
+
+  /**
+   * Set the value of an attribute of an element inside this custom anonymous
+   * content.
+   */
+  [Throws]
+  void setAttributeForElement(DOMString elementId,
+                              DOMString attributeName,
+                              DOMString value);
+
+  /**
+   * Remove an attribute from an element inside this custom anonymous content.
+   */
+  [Throws]
+  void removeAttributeForElement(DOMString elementId,
+                                 DOMString attributeName);
+
+  /**
+   * Get the canvas' context for the element specified if it's a <canvas>
+   * node, `null` otherwise.
+   */
+  [Throws]
+  nsISupports? getCanvasContext(DOMString elementId,
+                                DOMString contextId);
+
+  [Func="nsDocument::IsElementAnimateEnabled", Throws]
+  Animation setAnimationForElement(DOMString elementId,
+                                   object? keyframes,
+                                   optional UnrestrictedDoubleOrKeyframeAnimationOptions
+                                     options);
+
+  /**
+   * Accepts a list of (possibly overlapping) DOMRects which describe a shape
+   * in CSS pixels relative to the element's border box. This shape will be
+   * excluded from the element's background color rendering. The element will
+   * not render any background images once this method has been called.
+   */
+  [Throws]
+  void setCutoutRectsForElement(DOMString elementId,
+                                sequence<DOMRect> rects);
+
+  /**
+   * Get the computed value of a property on an element inside this custom
+   * anonymous content.
+   */
+  [Throws]
+  DOMString? getComputedStylePropertyValue(DOMString elementId,
+                                           DOMString propertyName);
+};
diff --git a/dom/webidl/AppInfo.webidl b/dom/webidl/AppInfo.webidl
new file mode 100644
index 000000000..a4f44d46c
--- /dev/null
+++ b/dom/webidl/AppInfo.webidl
@@ -0,0 +1,12 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+  * This dictionnary holds the parameters supporting the app:// protocol.
+  */
+dictionary AppInfo
+{
+  DOMString path = "";
+  boolean   isCoreApp = false;
+};
diff --git a/dom/webidl/AppNotificationServiceOptions.webidl b/dom/webidl/AppNotificationServiceOptions.webidl
new file mode 100644
index 000000000..f5addc92a
--- /dev/null
+++ b/dom/webidl/AppNotificationServiceOptions.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MozObserver;
+
+dictionary AppNotificationServiceOptions {
+  boolean textClickable = false;
+  DOMString manifestURL = "";
+  DOMString id = "";
+  DOMString dbId = "";
+  DOMString dir = "";
+  DOMString lang = "";
+  DOMString tag = "";
+  DOMString data = "";
+  NotificationBehavior mozbehavior = null;
+};
diff --git a/dom/webidl/Attr.webidl b/dom/webidl/Attr.webidl
new file mode 100644
index 000000000..763ed02ef
--- /dev/null
+++ b/dom/webidl/Attr.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface Attr : Node {
+  readonly attribute DOMString localName;
+           [CEReactions, SetterThrows]
+           attribute DOMString value;
+
+  [Constant]
+  readonly attribute DOMString name;
+  [Constant]
+  readonly attribute DOMString? namespaceURI;
+  [Constant]
+  readonly attribute DOMString? prefix;
+
+  readonly attribute boolean specified;
+};
+
+// Mozilla extensions
+
+partial interface Attr {
+           [GetterThrows]
+  readonly attribute Element? ownerElement;
+};
diff --git a/dom/webidl/AudioBuffer.webidl b/dom/webidl/AudioBuffer.webidl
new file mode 100644
index 000000000..ab45268f3
--- /dev/null
+++ b/dom/webidl/AudioBuffer.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioBuffer {
+
+    readonly attribute float sampleRate;
+    readonly attribute unsigned long length;
+
+    // in seconds 
+    readonly attribute double duration;
+
+    readonly attribute unsigned long numberOfChannels;
+
+    [Throws]
+    Float32Array getChannelData(unsigned long channel);
+
+    [Throws]
+    void copyFromChannel(Float32Array destination, long channelNumber, optional unsigned long startInChannel = 0);
+    [Throws]
+    void copyToChannel(Float32Array source, long channelNumber, optional unsigned long startInChannel = 0);
+};
+
diff --git a/dom/webidl/AudioBufferSourceNode.webidl b/dom/webidl/AudioBufferSourceNode.webidl
new file mode 100644
index 000000000..f74a968ec
--- /dev/null
+++ b/dom/webidl/AudioBufferSourceNode.webidl
@@ -0,0 +1,35 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioBufferSourceNode : AudioNode {
+
+    attribute AudioBuffer? buffer;
+
+    readonly attribute AudioParam playbackRate;
+    readonly attribute AudioParam detune;
+
+    attribute boolean loop;
+    attribute double loopStart;
+    attribute double loopEnd;
+
+    [Throws, UnsafeInPrerendering]
+    void start(optional double when = 0, optional double grainOffset = 0,
+               optional double grainDuration);
+    [Throws, UnsafeInPrerendering]
+    void stop(optional double when = 0);
+
+    attribute EventHandler onended;
+};
+
+// Mozilla extensions
+AudioBufferSourceNode implements AudioNodePassThrough;
diff --git a/dom/webidl/AudioChannel.webidl b/dom/webidl/AudioChannel.webidl
new file mode 100644
index 000000000..6e0ccf0b9
--- /dev/null
+++ b/dom/webidl/AudioChannel.webidl
@@ -0,0 +1,50 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// AudioChannels are used by:
+// * HTMLMediaElement
+// * AudioContext (WebAudio)
+// When used, it has to throw an exception if the app tries to change the audio
+// channel type without the permission (manifest file for B2G apps).
+// The supported values are:
+// * normal (default value)
+//   Automatically paused if "notification" or higher priority channel
+//   is played
+//   Use case: normal applications
+// * content
+//   Automatically paused if "notification" or higher priority channel
+//   is played. Also paused if another app starts using "content"
+//   channel. Using this channel never affects applications using
+//   the "normal" channel.
+//   Use case: video/audio players
+// * notification
+//   Automatically paused if "alarm" or higher priority channel is played.
+//   Use case: New email, incoming SMS
+// * alarm
+//   Automatically paused if "telephony" or higher priority channel is
+//   played.
+//   User case: Alarm clock, calendar alarms
+// * telephony
+//   Automatically paused if "ringer" or higher priority
+//   channel is played.
+//   Use case: dialer, voip
+// * ringer
+//   Automatically paused if "publicnotification" or higher priority
+//   channel is played.
+//   Use case: dialer, voip
+// * publicnotification
+//   Always plays in speaker, even when headphones are plugged in.
+//   Use case: Camera shutter sound.
+enum AudioChannel {
+  "normal",
+  "content",
+  "notification",
+  "alarm",
+  "telephony",
+  "ringer",
+  "publicnotification",
+  "system"
+};
diff --git a/dom/webidl/AudioChannelManager.webidl b/dom/webidl/AudioChannelManager.webidl
new file mode 100644
index 000000000..86bfd65da
--- /dev/null
+++ b/dom/webidl/AudioChannelManager.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface AudioChannelManager : EventTarget {
+  /**
+   * Indicates whether the headphones are plugged in or not.
+   */
+  readonly attribute boolean headphones;
+
+  /**
+   * Fired when the headphones are plugged or unplugged.
+   *
+   * When the headphones are unplugged, we may start playing audio through the
+   * system's speakers.  Similarly, when headphones are plugged in, we may
+   * switch audio from speakers to headphones.
+   *
+   * If audio is currently playing in this window or in one of its children, we
+   * will fire this event before we switch the audio output from headphones to
+   * speakers (or vice versa).  This allows you to, for example, pause your
+   * window's audio when the headphones are unplugged.
+   */
+  attribute EventHandler onheadphoneschange;
+
+  /**
+   * Indicates which audio channel is used to adjust volume when pressing HW
+   * volume keys.
+   */
+  attribute DOMString volumeControlChannel;
+
+  [Pure, Cached, Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  readonly attribute sequence<BrowserElementAudioChannel> allowedAudioChannels;
+};
diff --git a/dom/webidl/AudioContext.webidl b/dom/webidl/AudioContext.webidl
new file mode 100644
index 000000000..9aa3d5567
--- /dev/null
+++ b/dom/webidl/AudioContext.webidl
@@ -0,0 +1,121 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+callback DecodeSuccessCallback = void (AudioBuffer decodedData);
+callback DecodeErrorCallback = void ();
+
+enum AudioContextState {
+    "suspended",
+    "running",
+    "closed"
+};
+
+dictionary PeriodicWaveConstraints {
+  boolean disableNormalization = false;
+};
+
+[Constructor,
+ Pref="dom.webaudio.enabled"]
+interface AudioContext : EventTarget {
+
+    readonly attribute AudioDestinationNode destination;
+    readonly attribute float sampleRate;
+    readonly attribute double currentTime;
+    readonly attribute AudioListener listener;
+    readonly attribute AudioContextState state;
+    [Throws]
+    Promise<void> suspend();
+    [Throws]
+    Promise<void> resume();
+    [Throws]
+    Promise<void> close();
+    attribute EventHandler onstatechange;
+
+    [NewObject, Throws]
+    AudioBuffer createBuffer(unsigned long numberOfChannels, unsigned long length, float sampleRate);
+
+    [Throws]
+    Promise<AudioBuffer> decodeAudioData(ArrayBuffer audioData,
+                                         optional DecodeSuccessCallback successCallback,
+                                         optional DecodeErrorCallback errorCallback);
+
+    // AudioNode creation
+    [NewObject, Throws]
+    AudioBufferSourceNode createBufferSource();
+
+    [NewObject, Throws]
+    ConstantSourceNode createConstantSource();
+
+    [NewObject, Throws]
+    MediaStreamAudioDestinationNode createMediaStreamDestination();
+
+    [NewObject, Throws]
+    ScriptProcessorNode createScriptProcessor(optional unsigned long bufferSize = 0,
+                                              optional unsigned long numberOfInputChannels = 2,
+                                              optional unsigned long numberOfOutputChannels = 2);
+
+    [NewObject, Throws]
+    StereoPannerNode createStereoPanner();
+    [NewObject, Throws]
+    AnalyserNode createAnalyser();
+    [NewObject, Throws, UnsafeInPrerendering]
+    MediaElementAudioSourceNode createMediaElementSource(HTMLMediaElement mediaElement);
+    [NewObject, Throws, UnsafeInPrerendering]
+    MediaStreamAudioSourceNode createMediaStreamSource(MediaStream mediaStream);
+    [NewObject, Throws]
+    GainNode createGain();
+    [NewObject, Throws]
+    DelayNode createDelay(optional double maxDelayTime = 1);
+    [NewObject, Throws]
+    BiquadFilterNode createBiquadFilter();
+    [NewObject, Throws]
+    IIRFilterNode createIIRFilter(sequence<double> feedforward, sequence<double> feedback);
+    [NewObject, Throws]
+    WaveShaperNode createWaveShaper();
+    [NewObject, Throws]
+    PannerNode createPanner();
+    [NewObject, Throws]
+    ConvolverNode createConvolver();
+
+    [NewObject, Throws]
+    ChannelSplitterNode createChannelSplitter(optional unsigned long numberOfOutputs = 6);
+    [NewObject, Throws]
+    ChannelMergerNode createChannelMerger(optional unsigned long numberOfInputs = 6);
+
+    [NewObject, Throws]
+    DynamicsCompressorNode createDynamicsCompressor();
+
+    [NewObject, Throws]
+    OscillatorNode createOscillator();
+    [NewObject, Throws]
+    PeriodicWave createPeriodicWave(Float32Array real, Float32Array imag, optional PeriodicWaveConstraints constraints);
+
+};
+
+// Mozilla extensions
+partial interface AudioContext {
+  // Read AudioChannel.webidl for more information about this attribute.
+  [Pref="media.useAudioChannelAPI"]
+  readonly attribute AudioChannel mozAudioChannelType;
+
+  // These 2 events are dispatched when the AudioContext object is muted by
+  // the AudioChannelService. It's call 'interrupt' because when this event is
+  // dispatched on a HTMLMediaElement, the audio stream is paused.
+  [Pref="media.useAudioChannelAPI"]
+  attribute EventHandler onmozinterruptbegin;
+
+  [Pref="media.useAudioChannelAPI"]
+  attribute EventHandler onmozinterruptend;
+
+  // This method is for test only.
+  [ChromeOnly] AudioChannel testAudioChannelInAudioNodeStream();
+};
diff --git a/dom/webidl/AudioDestinationNode.webidl b/dom/webidl/AudioDestinationNode.webidl
new file mode 100644
index 000000000..e5c6db868
--- /dev/null
+++ b/dom/webidl/AudioDestinationNode.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioDestinationNode : AudioNode {
+
+    readonly attribute unsigned long maxChannelCount;
+
+};
+
diff --git a/dom/webidl/AudioListener.webidl b/dom/webidl/AudioListener.webidl
new file mode 100644
index 000000000..8970e6b98
--- /dev/null
+++ b/dom/webidl/AudioListener.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioListener {
+
+    // same as OpenAL (default 1)
+    [Deprecated="PannerNodeDoppler"]
+    attribute double dopplerFactor;
+
+    // in meters / second (default 343.3)
+    [Deprecated="PannerNodeDoppler"]
+    attribute double speedOfSound;
+
+    // Uses a 3D cartesian coordinate system
+    void setPosition(double x, double y, double z);
+    void setOrientation(double x, double y, double z, double xUp, double yUp, double zUp);
+    [Deprecated="PannerNodeDoppler"]
+    void setVelocity(double x, double y, double z);
+
+};
+
diff --git a/dom/webidl/AudioNode.webidl b/dom/webidl/AudioNode.webidl
new file mode 100644
index 000000000..d6aa577c0
--- /dev/null
+++ b/dom/webidl/AudioNode.webidl
@@ -0,0 +1,69 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum ChannelCountMode {
+    "max",
+    "clamped-max",
+    "explicit"
+};
+
+enum ChannelInterpretation {
+    "speakers",
+    "discrete"
+};
+
+[Pref="dom.webaudio.enabled"]
+interface AudioNode : EventTarget {
+
+    [Throws]
+    AudioNode connect(AudioNode destination, optional unsigned long output = 0, optional unsigned long input = 0);
+    [Throws]
+    void connect(AudioParam destination, optional unsigned long output = 0);
+    [Throws]
+    void disconnect();
+    [Throws]
+    void disconnect(unsigned long output);
+    [Throws]
+    void disconnect(AudioNode destination);
+    [Throws]
+    void disconnect(AudioNode destination, unsigned long output);
+    [Throws]
+    void disconnect(AudioNode destination, unsigned long output, unsigned long input);
+    [Throws]
+    void disconnect(AudioParam destination);
+    [Throws]
+    void disconnect(AudioParam destination, unsigned long output);
+
+    readonly attribute AudioContext context;
+    readonly attribute unsigned long numberOfInputs;
+    readonly attribute unsigned long numberOfOutputs;
+
+    // Channel up-mixing and down-mixing rules for all inputs.
+    [SetterThrows]
+    attribute unsigned long channelCount;
+    [SetterThrows]
+    attribute ChannelCountMode channelCountMode;
+    attribute ChannelInterpretation channelInterpretation;
+
+};
+
+// Mozilla extension
+partial interface AudioNode {
+  [ChromeOnly]
+  readonly attribute unsigned long id;
+};
+[NoInterfaceObject]
+interface AudioNodePassThrough {
+  [ChromeOnly]
+  attribute boolean passThrough;
+};
+
diff --git a/dom/webidl/AudioParam.webidl b/dom/webidl/AudioParam.webidl
new file mode 100644
index 000000000..ee5514f34
--- /dev/null
+++ b/dom/webidl/AudioParam.webidl
@@ -0,0 +1,50 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioParam {
+
+    attribute float value;
+    readonly attribute float defaultValue;
+
+    // Parameter automation. 
+    [Throws]
+    AudioParam setValueAtTime(float value, double startTime);
+    [Throws]
+    AudioParam linearRampToValueAtTime(float value, double endTime);
+    [Throws]
+    AudioParam exponentialRampToValueAtTime(float value, double endTime);
+
+    // Exponentially approach the target value with a rate having the given time constant. 
+    [Throws]
+    AudioParam setTargetAtTime(float target, double startTime, double timeConstant);
+
+    // Sets an array of arbitrary parameter values starting at time for the given duration. 
+    // The number of values will be scaled to fit into the desired duration. 
+    [Throws]
+    AudioParam setValueCurveAtTime(Float32Array values, double startTime, double duration);
+
+    // Cancels all scheduled parameter changes with times greater than or equal to startTime. 
+    [Throws]
+    AudioParam cancelScheduledValues(double startTime);
+
+};
+
+// Mozilla extension
+partial interface AudioParam {
+  // The ID of the AudioNode this AudioParam belongs to.
+  [ChromeOnly]
+  readonly attribute unsigned long parentNodeId;
+  // The name of the AudioParam
+  [ChromeOnly]
+  readonly attribute DOMString name;
+};
diff --git a/dom/webidl/AudioProcessingEvent.webidl b/dom/webidl/AudioProcessingEvent.webidl
new file mode 100644
index 000000000..8cf3d9cc2
--- /dev/null
+++ b/dom/webidl/AudioProcessingEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface AudioProcessingEvent : Event {
+
+  readonly attribute double playbackTime;
+
+  [Throws]
+  readonly attribute AudioBuffer inputBuffer;
+  [Throws]
+  readonly attribute AudioBuffer outputBuffer;
+
+};
+
diff --git a/dom/webidl/AudioStreamTrack.webidl b/dom/webidl/AudioStreamTrack.webidl
new file mode 100644
index 000000000..9fff71ced
--- /dev/null
+++ b/dom/webidl/AudioStreamTrack.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// [Constructor(optional MediaTrackConstraints audioConstraints)]
+interface AudioStreamTrack : MediaStreamTrack {
+//    static sequence<DOMString> getSourceIds ();
+};
diff --git a/dom/webidl/AudioTrack.webidl b/dom/webidl/AudioTrack.webidl
new file mode 100644
index 000000000..e70456a37
--- /dev/null
+++ b/dom/webidl/AudioTrack.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#audiotrack
+ */
+
+[Pref="media.track.enabled"]
+interface AudioTrack {
+  readonly attribute DOMString id;
+  readonly attribute DOMString kind;
+  readonly attribute DOMString label;
+  readonly attribute DOMString language;
+           attribute boolean enabled;
+};
diff --git a/dom/webidl/AudioTrackList.webidl b/dom/webidl/AudioTrackList.webidl
new file mode 100644
index 000000000..2c229a67a
--- /dev/null
+++ b/dom/webidl/AudioTrackList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#audiotracklist
+ */
+
+[Pref="media.track.enabled"]
+interface AudioTrackList : EventTarget {
+  readonly attribute unsigned long length;
+  getter AudioTrack (unsigned long index);
+  AudioTrack? getTrackById(DOMString id);
+
+           attribute EventHandler onchange;
+           attribute EventHandler onaddtrack;
+           attribute EventHandler onremovetrack;
+};
diff --git a/dom/webidl/AutocompleteErrorEvent.webidl b/dom/webidl/AutocompleteErrorEvent.webidl
new file mode 100644
index 000000000..23b8ae739
--- /dev/null
+++ b/dom/webidl/AutocompleteErrorEvent.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+enum AutoCompleteErrorReason {
+  "",
+  "cancel",
+  "disabled",
+  "invalid"
+};
+
+[Pref="dom.forms.requestAutocomplete",
+ Constructor(DOMString type, optional AutocompleteErrorEventInit eventInitDict)]
+interface AutocompleteErrorEvent : Event
+{
+  readonly attribute AutoCompleteErrorReason reason;
+};
+
+dictionary AutocompleteErrorEventInit : EventInit
+{
+  AutoCompleteErrorReason reason = "";
+};
diff --git a/dom/webidl/AutocompleteInfo.webidl b/dom/webidl/AutocompleteInfo.webidl
new file mode 100644
index 000000000..ad32ff6d3
--- /dev/null
+++ b/dom/webidl/AutocompleteInfo.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * This dictionary is used for the input, textarea and select element's
+ * getAutocompleteInfo method.
+ */
+
+dictionary AutocompleteInfo {
+  DOMString section = "";
+  DOMString addressType = "";
+  DOMString contactType = "";
+  DOMString fieldName = "";
+};
diff --git a/dom/webidl/BarProp.webidl b/dom/webidl/BarProp.webidl
new file mode 100644
index 000000000..76e5edeb5
--- /dev/null
+++ b/dom/webidl/BarProp.webidl
@@ -0,0 +1,11 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface BarProp
+{
+  [Throws]
+           attribute boolean visible;
+};
diff --git a/dom/webidl/BaseKeyframeTypes.webidl b/dom/webidl/BaseKeyframeTypes.webidl
new file mode 100644
index 000000000..f0b0e68b5
--- /dev/null
+++ b/dom/webidl/BaseKeyframeTypes.webidl
@@ -0,0 +1,48 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#the-compositeoperation-enumeration
+ * https://w3c.github.io/web-animations/#dictdef-basepropertyindexedkeyframe
+ * https://w3c.github.io/web-animations/#dictdef-basekeyframe
+ * https://w3c.github.io/web-animations/#dictdef-basecomputedkeyframe
+ *
+ * Copyright © 2016 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum CompositeOperation { "replace", "add", "accumulate" };
+
+// The following dictionary types are not referred to by other .webidl files,
+// but we use it for manual JS->IDL and IDL->JS conversions in
+// KeyframeEffectReadOnly's implementation.
+
+dictionary BasePropertyIndexedKeyframe {
+  DOMString easing = "linear";
+  CompositeOperation composite;
+};
+
+dictionary BaseKeyframe {
+  double? offset = null;
+  DOMString easing = "linear";
+  CompositeOperation composite;
+
+  // Non-standard extensions
+
+  // Member to allow testing when StyleAnimationValue::ComputeValues fails.
+  //
+  // Note that we currently only apply this to shorthand properties since
+  // it's easier to annotate shorthand property values and because we have
+  // only ever observed ComputeValues failing on shorthand values.
+  //
+  // Bug 1216844 should remove this member since after that bug is fixed we will
+  // have a well-defined behavior to use when animation endpoints are not
+  // available.
+  [ChromeOnly] boolean simulateComputeValuesFailure = false;
+};
+
+dictionary BaseComputedKeyframe : BaseKeyframe {
+  double computedOffset;
+};
diff --git a/dom/webidl/BeforeAfterKeyboardEvent.webidl b/dom/webidl/BeforeAfterKeyboardEvent.webidl
new file mode 100644
index 000000000..32c582f17
--- /dev/null
+++ b/dom/webidl/BeforeAfterKeyboardEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString typeArg,
+ optional BeforeAfterKeyboardEventInit eventInitDict),
+ Pref="dom.beforeAfterKeyboardEvent.enabled",
+ ChromeOnly]
+interface BeforeAfterKeyboardEvent : KeyboardEvent
+{
+  // The valid value of embeddedCancelled is:
+  // - "mozbrowserbeforekeydown": null
+  // - "mozbrowserbeforekeyup": null
+  // - "mozbrowserafterkeydown": true/false
+  // - "mozbrowserafterkeyup": true/false
+  readonly attribute boolean? embeddedCancelled;
+};
+
+dictionary BeforeAfterKeyboardEventInit : KeyboardEventInit
+{
+  boolean? embeddedCancelled = null;
+};
diff --git a/dom/webidl/BeforeUnloadEvent.webidl b/dom/webidl/BeforeUnloadEvent.webidl
new file mode 100644
index 000000000..e64e1b2c2
--- /dev/null
+++ b/dom/webidl/BeforeUnloadEvent.webidl
@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/#beforeunloadevent
+ */
+
+interface BeforeUnloadEvent : Event {
+  attribute DOMString returnValue;
+};
diff --git a/dom/webidl/BiquadFilterNode.webidl b/dom/webidl/BiquadFilterNode.webidl
new file mode 100644
index 000000000..7a9efb77d
--- /dev/null
+++ b/dom/webidl/BiquadFilterNode.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum BiquadFilterType {
+  "lowpass",
+  "highpass",
+  "bandpass",
+  "lowshelf",
+  "highshelf",
+  "peaking",
+  "notch",
+  "allpass"
+};
+
+[Pref="dom.webaudio.enabled"]
+interface BiquadFilterNode : AudioNode {
+
+    attribute BiquadFilterType type;
+    readonly attribute AudioParam frequency; // in Hertz
+    readonly attribute AudioParam detune; // in Cents
+    readonly attribute AudioParam Q; // Quality factor
+    readonly attribute AudioParam gain; // in Decibels
+
+    void getFrequencyResponse(Float32Array frequencyHz,
+                              Float32Array magResponse,
+                              Float32Array phaseResponse);
+
+};
+
+// Mozilla extension
+BiquadFilterNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Blob.webidl b/dom/webidl/Blob.webidl
new file mode 100644
index 000000000..4df66630d
--- /dev/null
+++ b/dom/webidl/Blob.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2006/webapi/FileAPI/#blob
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+typedef (ArrayBuffer or ArrayBufferView or Blob or USVString) BlobPart;
+
+[Constructor(optional sequence<BlobPart> blobParts,
+             optional BlobPropertyBag options),
+ Exposed=(Window,Worker)]
+interface Blob {
+
+  [GetterThrows]
+  readonly attribute unsigned long long size;
+
+  readonly attribute DOMString type;
+
+  // readonly attribute boolean isClosed; TODO bug 1048321
+
+  //slice Blob into byte-ranged chunks
+
+  [Throws]
+  Blob slice([Clamp] optional long long start,
+             [Clamp] optional long long end,
+             optional DOMString contentType = "");
+
+  // void close(); TODO bug 1048325
+};
+
+enum EndingTypes { "transparent", "native" };
+
+dictionary BlobPropertyBag {
+  DOMString type = "";
+  EndingTypes endings = "transparent";
+};
diff --git a/dom/webidl/BlobEvent.webidl b/dom/webidl/BlobEvent.webidl
new file mode 100644
index 000000000..8d0418701
--- /dev/null
+++ b/dom/webidl/BlobEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional BlobEventInit eventInitDict)]
+interface BlobEvent : Event
+{
+  readonly attribute Blob? data;
+};
+
+dictionary BlobEventInit : EventInit
+{
+  Blob? data = null;
+};
diff --git a/dom/webidl/BoxObject.webidl b/dom/webidl/BoxObject.webidl
new file mode 100644
index 000000000..8bebd6c9e
--- /dev/null
+++ b/dom/webidl/BoxObject.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Func="IsChromeOrXBL"]
+interface BoxObject {
+  readonly attribute Element? element;
+
+  readonly attribute long x;
+  readonly attribute long y;
+  [Throws]
+  readonly attribute long screenX;
+  [Throws]
+  readonly attribute long screenY;
+  readonly attribute long width;
+  readonly attribute long height;
+
+  nsISupports? getPropertyAsSupports(DOMString propertyName);
+  void setPropertyAsSupports(DOMString propertyName, nsISupports value);
+  [Throws]
+  DOMString? getProperty(DOMString propertyName);
+  void setProperty(DOMString propertyName, DOMString propertyValue);
+  void removeProperty(DOMString propertyName);
+
+  // for stepping through content in the expanded dom with box-ordinal-group order
+  readonly attribute Element? parentBox;
+  readonly attribute Element? firstChild;
+  readonly attribute Element? lastChild;
+  readonly attribute Element? nextSibling;
+  readonly attribute Element? previousSibling;
+};
diff --git a/dom/webidl/BroadcastChannel.webidl b/dom/webidl/BroadcastChannel.webidl
new file mode 100644
index 000000000..70be23522
--- /dev/null
+++ b/dom/webidl/BroadcastChannel.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/web-messaging.html#broadcasting-to-other-browsing-contexts
+ */
+
+[Constructor(DOMString channel),
+ Exposed=(Window,Worker)]
+interface BroadcastChannel : EventTarget {
+  readonly attribute DOMString name;
+
+  [Throws]
+  void postMessage(any message);
+
+  void close();
+
+           attribute EventHandler onmessage;
+};
diff --git a/dom/webidl/BrowserElement.webidl b/dom/webidl/BrowserElement.webidl
new file mode 100644
index 000000000..2516d7da5
--- /dev/null
+++ b/dom/webidl/BrowserElement.webidl
@@ -0,0 +1,178 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+callback BrowserElementNextPaintEventCallback = void ();
+
+enum BrowserFindCaseSensitivity { "case-sensitive", "case-insensitive" };
+enum BrowserFindDirection { "forward", "backward" };
+
+dictionary BrowserElementDownloadOptions {
+  DOMString? filename;
+  DOMString? referrer;
+};
+
+dictionary BrowserElementExecuteScriptOptions {
+  DOMString? url;
+  DOMString? origin;
+};
+
+[NoInterfaceObject]
+interface BrowserElement {
+};
+
+BrowserElement implements BrowserElementCommon;
+BrowserElement implements BrowserElementPrivileged;
+
+[NoInterfaceObject]
+interface BrowserElementCommon {
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void setVisible(boolean visible);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getVisible();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void setActive(boolean active);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  boolean getActive();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void addNextPaintListener(BrowserElementNextPaintEventCallback listener);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void removeNextPaintListener(BrowserElementNextPaintEventCallback listener);
+};
+
+[NoInterfaceObject]
+interface BrowserElementPrivileged {
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void sendMouseEvent(DOMString type,
+                      unsigned long x,
+                      unsigned long y,
+                      unsigned long button,
+                      unsigned long clickCount,
+                      unsigned long modifiers);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   Func="TouchEvent::PrefEnabled",
+   ChromeOnly]
+  void sendTouchEvent(DOMString type,
+                      sequence<unsigned long> identifiers,
+                      sequence<long> x,
+                      sequence<long> y,
+                      sequence<unsigned long> rx,
+                      sequence<unsigned long> ry,
+                      sequence<float> rotationAngles,
+                      sequence<float> forces,
+                      unsigned long count,
+                      unsigned long modifiers);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void goBack();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void goForward();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void reload(optional boolean hardReload = false);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void stop();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest download(DOMString url,
+                      optional BrowserElementDownloadOptions options);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest purgeHistory();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getScreenshot([EnforceRange] unsigned long width,
+                           [EnforceRange] unsigned long height,
+                           optional DOMString mimeType="");
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void zoom(float zoom);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getCanGoBack();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getCanGoForward();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getContentDimensions();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest setInputMethodActive(boolean isActive);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void findAll(DOMString searchString, BrowserFindCaseSensitivity caseSensitivity);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void findNext(BrowserFindDirection direction);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void clearMatch();
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest executeScript(DOMString script,
+                           optional BrowserElementExecuteScriptOptions options);
+
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getWebManifest();
+
+};
diff --git a/dom/webidl/BrowserElementAudioChannel.webidl b/dom/webidl/BrowserElementAudioChannel.webidl
new file mode 100644
index 000000000..55dbe3fb4
--- /dev/null
+++ b/dom/webidl/BrowserElementAudioChannel.webidl
@@ -0,0 +1,77 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.mozBrowserFramesEnabled",
+ ChromeOnly]
+interface BrowserElementAudioChannel : EventTarget {
+  readonly attribute AudioChannel name;
+
+  // This event is dispatched when this audiochannel is actually in used by the
+  // app or one of the sub-iframes.
+  attribute EventHandler onactivestatechanged;
+
+  [Throws]
+  DOMRequest getVolume();
+
+  [Throws]
+  DOMRequest setVolume(float aVolume);
+
+  [Throws]
+  DOMRequest getMuted();
+
+  [Throws]
+  DOMRequest setMuted(boolean aMuted);
+
+  [Throws]
+  DOMRequest isActive();
+};
+
+partial interface BrowserElementPrivileged {
+  [Pure, Cached, Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  readonly attribute sequence<BrowserElementAudioChannel> allowedAudioChannels;
+
+  /**
+   * Mutes all audio in this browser.
+   */
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void mute();
+
+  /**
+   * Unmutes all audio in this browser.
+   */
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void unmute();
+
+  /**
+   * Obtains whether or not the browser is muted.
+   */
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getMuted();
+
+  /**
+   * Sets the volume for the browser.
+   */
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  void setVolume(float volume);
+
+  /**
+   * Gets the volume for the browser.
+   */
+  [Throws,
+   Pref="dom.mozBrowserFramesEnabled",
+   ChromeOnly]
+  DOMRequest getVolume();
+};
diff --git a/dom/webidl/BrowserElementDictionaries.webidl b/dom/webidl/BrowserElementDictionaries.webidl
new file mode 100644
index 000000000..400e40253
--- /dev/null
+++ b/dom/webidl/BrowserElementDictionaries.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary OpenWindowEventDetail {
+  DOMString url = "";
+  DOMString name = "";
+  DOMString features = "";
+  Node? frameElement = null;
+};
+
+dictionary DOMWindowResizeEventDetail {
+  long width = 0;
+  long height = 0;
+};
diff --git a/dom/webidl/BrowserElementProxy.webidl b/dom/webidl/BrowserElementProxy.webidl
new file mode 100644
index 000000000..6f6fb5ebe
--- /dev/null
+++ b/dom/webidl/BrowserElementProxy.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor,
+ JSImplementation="@mozilla.org/dom/browser-element-proxy;1",
+ NavigatorProperty="mozBrowserElementProxy",
+ Pref="dom.mozBrowserFramesEnabled",
+ ChromeOnly]
+interface BrowserElementProxy : EventTarget {
+};
+BrowserElementProxy implements BrowserElementCommon;
+BrowserElementProxy implements BrowserElementPrivileged;
diff --git a/dom/webidl/BrowserFeedWriter.webidl b/dom/webidl/BrowserFeedWriter.webidl
new file mode 100644
index 000000000..d756a8837
--- /dev/null
+++ b/dom/webidl/BrowserFeedWriter.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[JSImplementation="@mozilla.org/browser/feeds/result-writer;1",
+ Func="mozilla::FeedWriterEnabled::IsEnabled",
+ Constructor]
+interface BrowserFeedWriter {
+  /**
+   * Writes the feed content, assumes that the feed writer is initialized.
+   */
+  void writeContent();
+
+  /**
+   * Uninitialize the feed writer.
+   */
+  void close();
+};
diff --git a/dom/webidl/CDATASection.webidl b/dom/webidl/CDATASection.webidl
new file mode 100644
index 000000000..895dae089
--- /dev/null
+++ b/dom/webidl/CDATASection.webidl
@@ -0,0 +1,8 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface CDATASection : Text {
+};
diff --git a/dom/webidl/CSPDictionaries.webidl b/dom/webidl/CSPDictionaries.webidl
new file mode 100644
index 000000000..f8de1c9ad
--- /dev/null
+++ b/dom/webidl/CSPDictionaries.webidl
@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+  * Dictionary used to display CSP info.
+  */
+
+dictionary CSP {
+  boolean report-only = false;
+
+  sequence<DOMString> default-src;
+  sequence<DOMString> script-src;
+  sequence<DOMString> object-src;
+  sequence<DOMString> style-src;
+  sequence<DOMString> img-src;
+  sequence<DOMString> media-src;
+  sequence<DOMString> frame-src;
+  sequence<DOMString> font-src;
+  sequence<DOMString> connect-src;
+  sequence<DOMString> report-uri;
+  sequence<DOMString> frame-ancestors;
+  // sequence<DOMString> reflected-xss; // not supported in Firefox
+  sequence<DOMString> base-uri;
+  sequence<DOMString> form-action;
+  sequence<DOMString> referrer;
+  sequence<DOMString> manifest-src;
+  sequence<DOMString> upgrade-insecure-requests;
+  sequence<DOMString> child-src;
+  sequence<DOMString> block-all-mixed-content;
+  sequence<DOMString> require-sri-for;
+  sequence<DOMString> sandbox;
+  sequence<DOMString> worker-src;
+};
+
+dictionary CSPPolicies {
+  sequence<CSP> csp-policies;
+};
diff --git a/dom/webidl/CSPReport.webidl b/dom/webidl/CSPReport.webidl
new file mode 100644
index 000000000..390898c83
--- /dev/null
+++ b/dom/webidl/CSPReport.webidl
@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+  * This dictionary holds the parameters used to send
+  * CSP reports in JSON format.
+  */
+
+dictionary CSPReportProperties {
+  DOMString document-uri = "";
+  DOMString referrer = "";
+  DOMString blocked-uri = "";
+  DOMString violated-directive = "";
+  DOMString original-policy= "";
+  DOMString source-file;
+  DOMString script-sample;
+  long line-number;
+};
+
+dictionary CSPReport {
+  CSPReportProperties csp-report;
+};
diff --git a/dom/webidl/CSS.webidl b/dom/webidl/CSS.webidl
new file mode 100644
index 000000000..b5cdab2d1
--- /dev/null
+++ b/dom/webidl/CSS.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css3-conditional/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface CSS {
+  [Throws]
+  static boolean supports(DOMString property, DOMString value);
+
+  [Throws]
+  static boolean supports(DOMString conditionText);
+};
+
+// http://dev.w3.org/csswg/cssom/#the-css.escape%28%29-method
+partial interface CSS {
+  static DOMString escape(DOMString ident);
+};
diff --git a/dom/webidl/CSS2Properties.webidl.in b/dom/webidl/CSS2Properties.webidl.in
new file mode 100644
index 000000000..62603b229
--- /dev/null
+++ b/dom/webidl/CSS2Properties.webidl.in
@@ -0,0 +1,3 @@
+interface CSS2Properties : CSSStyleDeclaration {
+${props}
+};
diff --git a/dom/webidl/CSSAnimation.webidl b/dom/webidl/CSSAnimation.webidl
new file mode 100644
index 000000000..8799bfadb
--- /dev/null
+++ b/dom/webidl/CSSAnimation.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-animations-2/#the-CSSAnimation-interface
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::IsWebAnimationsEnabled",
+ HeaderFile="nsAnimationManager.h"]
+interface CSSAnimation : Animation {
+  [Constant] readonly attribute DOMString animationName;
+};
diff --git a/dom/webidl/CSSLexer.webidl b/dom/webidl/CSSLexer.webidl
new file mode 100644
index 000000000..86fbfcfff
--- /dev/null
+++ b/dom/webidl/CSSLexer.webidl
@@ -0,0 +1,168 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// The possible values for CSSToken.tokenType.
+enum CSSTokenType {
+  // Whitespace.
+  "whitespace",
+  // A CSS comment.
+  "comment",
+  // An identifier.  |text| holds the identifier text.
+  "ident",
+  // A function token.  |text| holds the function name.  Note that the
+  // function token includes (i.e., consumes) the "(" -- but this is
+  // not included in |text|.
+  "function",
+  // "@word".  |text| holds "word", without the "@".
+  "at",
+  // "#word".  |text| holds "word", without the "#".
+  "id",
+  // "#word".  ID is used when "word" would have been a valid IDENT
+  // token without the "#"; otherwise, HASH is used.
+  "hash",
+  // A number.
+  "number",
+  // A dimensioned number.
+  "dimension",
+  // A percentage.
+  "percentage",
+  // A string.
+  "string",
+  // A "bad string".  This can only be returned when a string is
+  // unterminated at EOF.  (However, currently the lexer returns
+  // ordinary STRING tokens in this situation.)
+  "bad_string",
+  // A URL.  |text| holds the URL.
+  "url",
+  // A "bad URL".  This is a URL that is unterminated at EOF.  |text|
+  // holds the URL.
+  "bad_url",
+  // A "symbol" is any one-character symbol.  This corresponds to the
+  // DELIM token in the CSS specification.
+  "symbol",
+  // The "~=" token.
+  "includes",
+  // The "|=" token.
+  "dashmatch",
+  // The "^=" token.
+  "beginsmatch",
+  // The "$=" token.
+  "endsmatch",
+  // The "*=" token.
+  "containsmatch",
+  // A unicode-range token.  This is currently not fully represented
+  // by CSSToken.
+  "urange",
+  // HTML comment delimiters, either "<!--" or "-->".  Note that each
+  // is emitted as a separate token, and the intervening text is lexed
+  // as normal; whereas ordinary CSS comments are lexed as a unit.
+  "htmlcomment"
+};
+
+dictionary CSSToken {
+  // The token type.
+  CSSTokenType tokenType = "whitespace";
+
+  // Offset of the first character of the token.
+  unsigned long startOffset = 0;
+  // Offset of the character after the final character of the token.
+  // This is chosen so that the offsets can be passed to |substring|
+  // to yield the exact contents of the token.
+  unsigned long endOffset = 0;
+
+  // If the token is a number, percentage, or dimension, this holds
+  // the value.  This is not present for other token types.
+  double number;
+  // If the token is a number, percentage, or dimension, this is true
+  // iff the number had an explicit sign.  This is not present for
+  // other token types.
+  boolean hasSign;
+  // If the token is a number, percentage, or dimension, this is true
+  // iff the number was specified as an integer.  This is not present
+  // for other token types.
+  boolean isInteger;
+
+  // Text associated with the token.  This is not present for all
+  // token types.  In particular it is:
+  //
+  // Token type    Meaning
+  // ===============================
+  //    ident      The identifier.
+  //    function   The function name.  Note that the "(" is part
+  //               of the token but is not present in |text|.
+  //    at         The word.
+  //    id         The word.
+  //    hash       The word.
+  //    dimension  The dimension.
+  //    string     The string contents after escape processing.
+  //    bad_string Ditto.
+  //    url        The URL after escape processing.
+  //    bad_url    Ditto.
+  //    symbol     The symbol text.
+  DOMString text;
+};
+
+/**
+ * CSSLexer is an interface to the CSS lexer.  It tokenizes an
+ * input stream and returns CSS tokens.
+ *
+ * @see inIDOMUtils.getCSSLexer to create an instance of the lexer.
+ */
+[ChromeOnly]
+interface CSSLexer
+{
+  /**
+   * The line number of the most recently returned token.  Line
+   * numbers are 0-based.
+   */
+  readonly attribute unsigned long lineNumber;
+
+  /**
+   * The column number of the most recently returned token.  Column
+   * numbers are 0-based.
+   */
+  readonly attribute unsigned long columnNumber;
+
+  /**
+   * When EOF is reached, the last token might be unterminated in some
+   * ways.  This method takes an input string and appends the needed
+   * terminators.  In particular:
+   *
+   * 1. If EOF occurs mid-string, this will append the correct quote.
+   * 2. If EOF occurs in a url token, this will append the close paren.
+   * 3. If EOF occurs in a comment this will append the comment closer.
+   *
+   * A trailing backslash might also have been present in the input
+   * string.  This is handled in different ways, depending on the
+   * context and arguments.
+   *
+   * If preserveBackslash is true, then the existing backslash at the
+   * end of inputString is preserved, and a new backslash is appended.
+   * That is, the input |\| is transformed to |\\|, and the
+   * input |'\| is transformed to |'\\'|.
+   *
+   * Otherwise, preserveBackslash is false:
+   * If the backslash appears in a string context, then the trailing
+   * backslash is dropped from inputString.  That is, |"\| is
+   * transformed to |""|.
+   * If the backslash appears outside of a string context, then
+   * U+FFFD is appended.  That is, |\| is transformed to a string
+   * with two characters: backslash followed by U+FFFD.
+   *
+   * Passing false for preserveBackslash makes the result conform to
+   * the CSS Syntax specification.  However, passing true may give
+   * somewhat more intuitive behavior.
+   *
+   * @param inputString the input string
+   * @param preserveBackslash how to handle trailing backslashes
+   * @return the input string with the termination characters appended
+   */
+  DOMString performEOFFixup(DOMString inputString, boolean preserveBackslash);
+
+  /**
+   * Return the next token, or null at EOF.
+   */
+  CSSToken? nextToken();
+};
diff --git a/dom/webidl/CSSPrimitiveValue.webidl b/dom/webidl/CSSPrimitiveValue.webidl
new file mode 100644
index 000000000..87141fee2
--- /dev/null
+++ b/dom/webidl/CSSPrimitiveValue.webidl
@@ -0,0 +1,56 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface Counter;
+
+interface CSSPrimitiveValue : CSSValue {
+
+  // UnitTypes
+  const unsigned short      CSS_UNKNOWN                    = 0;
+  const unsigned short      CSS_NUMBER                     = 1;
+  const unsigned short      CSS_PERCENTAGE                 = 2;
+  const unsigned short      CSS_EMS                        = 3;
+  const unsigned short      CSS_EXS                        = 4;
+  const unsigned short      CSS_PX                         = 5;
+  const unsigned short      CSS_CM                         = 6;
+  const unsigned short      CSS_MM                         = 7;
+  const unsigned short      CSS_IN                         = 8;
+  const unsigned short      CSS_PT                         = 9;
+  const unsigned short      CSS_PC                         = 10;
+  const unsigned short      CSS_DEG                        = 11;
+  const unsigned short      CSS_RAD                        = 12;
+  const unsigned short      CSS_GRAD                       = 13;
+  const unsigned short      CSS_MS                         = 14;
+  const unsigned short      CSS_S                          = 15;
+  const unsigned short      CSS_HZ                         = 16;
+  const unsigned short      CSS_KHZ                        = 17;
+  const unsigned short      CSS_DIMENSION                  = 18;
+  const unsigned short      CSS_STRING                     = 19;
+  const unsigned short      CSS_URI                        = 20;
+  const unsigned short      CSS_IDENT                      = 21;
+  const unsigned short      CSS_ATTR                       = 22;
+  const unsigned short      CSS_COUNTER                    = 23;
+  const unsigned short      CSS_RECT                       = 24;
+  const unsigned short      CSS_RGBCOLOR                   = 25;
+
+  readonly attribute unsigned short   primitiveType;
+  [Throws]
+  void               setFloatValue(unsigned short unitType,
+                                   float floatValue);
+  [Throws]
+  float              getFloatValue(unsigned short unitType);
+  [Throws]
+  void               setStringValue(unsigned short stringType,
+                                    DOMString stringValue);
+  [Throws]
+  DOMString          getStringValue();
+  [Throws]
+  Counter            getCounterValue();
+  [Throws]
+  Rect               getRectValue();
+  [Throws]
+  RGBColor           getRGBColorValue();
+};
diff --git a/dom/webidl/CSSPseudoElement.webidl b/dom/webidl/CSSPseudoElement.webidl
new file mode 100644
index 000000000..250bef03c
--- /dev/null
+++ b/dom/webidl/CSSPseudoElement.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://drafts.csswg.org/css-pseudo/#CSSPseudoElement-interface
+ * https://drafts.csswg.org/cssom/#pseudoelement
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// Both CSSOM and CSS Pseudo-Elements 4 provide contradictory definitions for
+// this interface.
+// What we implement here is a minimal subset of the two definitions which we
+// ship behind a pref until the specification issues have been resolved.
+[Func="nsDocument::IsWebAnimationsGetAnimationsEnabled"]
+interface CSSPseudoElement {
+  readonly attribute DOMString type;
+  readonly attribute Element parentElement;
+};
+
+// https://w3c.github.io/web-animations/#extensions-to-the-pseudoelement-interface
+CSSPseudoElement implements Animatable;
diff --git a/dom/webidl/CSSRuleList.webidl b/dom/webidl/CSSRuleList.webidl
new file mode 100644
index 000000000..c4faec148
--- /dev/null
+++ b/dom/webidl/CSSRuleList.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface CSSRuleList {
+  readonly attribute unsigned long length;
+  getter CSSRule? item(unsigned long index);
+};
diff --git a/dom/webidl/CSSStyleDeclaration.webidl b/dom/webidl/CSSStyleDeclaration.webidl
new file mode 100644
index 000000000..561e5cce1
--- /dev/null
+++ b/dom/webidl/CSSStyleDeclaration.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/cssom/
+ */
+
+interface CSSRule;
+
+interface CSSStyleDeclaration {
+  [CEReactions, SetterThrows]
+  attribute DOMString cssText;
+
+  readonly attribute unsigned long length;
+  getter DOMString item(unsigned long index);
+
+  [Throws]
+  DOMString getPropertyValue(DOMString property);
+  // Mozilla extension, sort of
+  [Throws]
+  CSSValue? getPropertyCSSValue(DOMString property);
+  DOMString getPropertyPriority(DOMString property);
+  [CEReactions, Throws]
+  void setProperty(DOMString property, [TreatNullAs=EmptyString] DOMString value, [TreatNullAs=EmptyString] optional DOMString priority = "");
+  [CEReactions, Throws]
+  DOMString removeProperty(DOMString property);
+
+  readonly attribute CSSRule? parentRule;
+};
+
+// Mozilla extensions
+partial interface CSSStyleDeclaration {
+  [ChromeOnly,Throws]
+  DOMString getAuthoredPropertyValue(DOMString property);
+};
diff --git a/dom/webidl/CSSStyleSheet.webidl b/dom/webidl/CSSStyleSheet.webidl
new file mode 100644
index 000000000..677d3ec52
--- /dev/null
+++ b/dom/webidl/CSSStyleSheet.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/cssom/
+ */
+
+interface CSSRule;
+
+enum CSSStyleSheetParsingMode {
+  "author",
+  "user",
+  "agent"
+};
+
+interface CSSStyleSheet : StyleSheet {
+  [Pure]
+  readonly attribute CSSRule? ownerRule;
+  [Throws, NeedsSubjectPrincipal]
+  readonly attribute CSSRuleList cssRules;
+  [ChromeOnly, BinaryName="parsingModeDOM"]
+  readonly attribute CSSStyleSheetParsingMode parsingMode;
+  [Throws, NeedsSubjectPrincipal]
+  unsigned long insertRule(DOMString rule, optional unsigned long index = 0);
+  [Throws, NeedsSubjectPrincipal]
+  void deleteRule(unsigned long index);
+
+  // Non-standard WebKit things, see https://github.com/w3c/csswg-drafts/pull/3900.
+  [Throws, NeedsSubjectPrincipal, BinaryName="cssRules"]
+  readonly attribute CSSRuleList rules;
+  [Throws, NeedsSubjectPrincipal, BinaryName="deleteRule"]
+  void removeRule(optional unsigned long index = 0);
+  [Throws, NeedsSubjectPrincipal]
+  long addRule(optional DOMString selector = "undefined", optional DOMString style = "undefined", optional unsigned long index);
+};
diff --git a/dom/webidl/CSSTransition.webidl b/dom/webidl/CSSTransition.webidl
new file mode 100644
index 000000000..44ffb79f2
--- /dev/null
+++ b/dom/webidl/CSSTransition.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-transitions-2/#the-CSSTransition-interface
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="nsDocument::IsWebAnimationsEnabled",
+ HeaderFile="nsTransitionManager.h"]
+interface CSSTransition : Animation {
+  [Constant] readonly attribute DOMString transitionProperty;
+};
diff --git a/dom/webidl/CSSValue.webidl b/dom/webidl/CSSValue.webidl
new file mode 100644
index 000000000..03bcb0a7e
--- /dev/null
+++ b/dom/webidl/CSSValue.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface CSSValue {
+
+  // UnitTypes
+  const unsigned short      CSS_INHERIT                    = 0;
+  const unsigned short      CSS_PRIMITIVE_VALUE            = 1;
+  const unsigned short      CSS_VALUE_LIST                 = 2;
+  const unsigned short      CSS_CUSTOM                     = 3;
+
+           [Throws]
+           attribute DOMString        cssText;
+
+  readonly attribute unsigned short   cssValueType;
+};
diff --git a/dom/webidl/CSSValueList.webidl b/dom/webidl/CSSValueList.webidl
new file mode 100644
index 000000000..d2a14b5fb
--- /dev/null
+++ b/dom/webidl/CSSValueList.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface CSSValueList : CSSValue {
+         readonly attribute unsigned long    length;
+  getter CSSValue?          item(unsigned long index);
+};
diff --git a/dom/webidl/Cache.webidl b/dom/webidl/Cache.webidl
new file mode 100644
index 000000000..b2c698bb0
--- /dev/null
+++ b/dom/webidl/Cache.webidl
@@ -0,0 +1,44 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::cache::Cache::PrefEnabled"]
+interface Cache {
+  [NewObject]
+  Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
+  [NewObject]
+  Promise<sequence<Response>> matchAll(optional RequestInfo request, optional CacheQueryOptions options);
+  [NewObject]
+  Promise<void> add(RequestInfo request);
+  [NewObject]
+  Promise<void> addAll(sequence<RequestInfo> requests);
+  [NewObject]
+  Promise<void> put(RequestInfo request, Response response);
+  [NewObject]
+  Promise<boolean> delete(RequestInfo request, optional CacheQueryOptions options);
+  [NewObject]
+  Promise<sequence<Request>> keys(optional RequestInfo request, optional CacheQueryOptions options);
+};
+
+dictionary CacheQueryOptions {
+  boolean ignoreSearch = false;
+  boolean ignoreMethod = false;
+  boolean ignoreVary = false;
+  DOMString cacheName;
+};
+
+dictionary CacheBatchOperation {
+  DOMString type;
+  Request request;
+  Response response;
+  CacheQueryOptions options;
+};
diff --git a/dom/webidl/CacheStorage.webidl b/dom/webidl/CacheStorage.webidl
new file mode 100644
index 000000000..cf5bad44b
--- /dev/null
+++ b/dom/webidl/CacheStorage.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#cache-storage
+
+interface Principal;
+
+[Exposed=(Window,Worker),
+ ChromeConstructor(CacheStorageNamespace namespace, Principal principal),
+ Func="mozilla::dom::cache::CacheStorage::PrefEnabled"]
+interface CacheStorage {
+  [NewObject]
+  Promise<Response> match(RequestInfo request, optional CacheQueryOptions options);
+  [NewObject]
+  Promise<boolean> has(DOMString cacheName);
+  [NewObject]
+  Promise<Cache> open(DOMString cacheName);
+  [NewObject]
+  Promise<boolean> delete(DOMString cacheName);
+  [NewObject]
+  Promise<sequence<DOMString>> keys();
+};
+
+// chrome-only, gecko specific extension
+enum CacheStorageNamespace {
+  "content", "chrome"
+};
diff --git a/dom/webidl/CanvasCaptureMediaStream.webidl b/dom/webidl/CanvasCaptureMediaStream.webidl
new file mode 100644
index 000000000..98b1adbf6
--- /dev/null
+++ b/dom/webidl/CanvasCaptureMediaStream.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/mediacapture-fromelement/index.html
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+[Pref="canvas.capturestream.enabled"]
+interface CanvasCaptureMediaStream : MediaStream {
+    readonly attribute HTMLCanvasElement canvas;
+    void requestFrame();
+};
diff --git a/dom/webidl/CanvasRenderingContext2D.webidl b/dom/webidl/CanvasRenderingContext2D.webidl
new file mode 100644
index 000000000..1c5564215
--- /dev/null
+++ b/dom/webidl/CanvasRenderingContext2D.webidl
@@ -0,0 +1,340 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+enum CanvasWindingRule { "nonzero", "evenodd" };
+
+dictionary ContextAttributes2D {
+  // whether or not we're planning to do a lot of readback operations
+  boolean willReadFrequently = false;
+  // signal if the canvas contains an alpha channel
+  boolean alpha = true;
+};
+
+dictionary HitRegionOptions {
+  Path2D? path = null;
+  DOMString id = "";
+  Element? control = null;
+};
+
+typedef (HTMLImageElement or
+         SVGImageElement) HTMLOrSVGImageElement;
+
+typedef (HTMLOrSVGImageElement or
+         HTMLCanvasElement or
+         HTMLVideoElement or
+         ImageBitmap) CanvasImageSource;
+
+interface CanvasRenderingContext2D {
+
+  // back-reference to the canvas.  Might be null if we're not
+  // associated with a canvas.
+  readonly attribute HTMLCanvasElement? canvas;
+
+  // state
+  void save(); // push state on state stack
+  void restore(); // pop state stack and restore state
+
+  // transformations (default transform is the identity matrix)
+// NOT IMPLEMENTED           attribute SVGMatrix currentTransform;
+  [Throws, LenientFloat]
+  void scale(double x, double y);
+  [Throws, LenientFloat]
+  void rotate(double angle);
+  [Throws, LenientFloat]
+  void translate(double x, double y);
+  [Throws, LenientFloat]
+  void transform(double a, double b, double c, double d, double e, double f);
+  [Throws, LenientFloat]
+  void setTransform(double a, double b, double c, double d, double e, double f);
+  [Throws]
+  void resetTransform();
+
+  // compositing
+           attribute unrestricted double globalAlpha; // (default 1.0)
+           [Throws]
+           attribute DOMString globalCompositeOperation; // (default source-over)
+
+  // colors and styles (see also the CanvasDrawingStyles interface)
+           attribute (DOMString or CanvasGradient or CanvasPattern) strokeStyle; // (default black)
+           attribute (DOMString or CanvasGradient or CanvasPattern) fillStyle; // (default black)
+  [NewObject]
+  CanvasGradient createLinearGradient(double x0, double y0, double x1, double y1);
+  [NewObject, Throws]
+  CanvasGradient createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1);
+  [NewObject, Throws]
+  CanvasPattern? createPattern(CanvasImageSource image, [TreatNullAs=EmptyString] DOMString repetition);
+
+  // shadows
+           [LenientFloat]
+           attribute double shadowOffsetX; // (default 0)
+           [LenientFloat]
+           attribute double shadowOffsetY; // (default 0)
+           [LenientFloat]
+           attribute double shadowBlur; // (default 0)
+           attribute DOMString shadowColor; // (default transparent black)
+
+  [Pref="canvas.filters.enabled", SetterThrows]
+  attribute DOMString filter; // (default empty string = no filter)
+
+  // rects
+  [LenientFloat]
+  void clearRect(double x, double y, double w, double h);
+  [LenientFloat]
+  void fillRect(double x, double y, double w, double h);
+  [LenientFloat]
+  void strokeRect(double x, double y, double w, double h);
+
+  // path API (see also CanvasPathMethods)
+  void beginPath();
+  void fill(optional CanvasWindingRule winding = "nonzero");
+  void fill(Path2D path, optional CanvasWindingRule winding = "nonzero");
+  void stroke();
+  void stroke(Path2D path);
+  [Pref="canvas.focusring.enabled", Throws] void drawFocusIfNeeded(Element element);
+// NOT IMPLEMENTED  void drawSystemFocusRing(Path path, HTMLElement element);
+  [Pref="canvas.customfocusring.enabled"] boolean drawCustomFocusRing(Element element);
+// NOT IMPLEMENTED  boolean drawCustomFocusRing(Path path, HTMLElement element);
+// NOT IMPLEMENTED  void scrollPathIntoView();
+// NOT IMPLEMENTED  void scrollPathIntoView(Path path);
+  void clip(optional CanvasWindingRule winding = "nonzero");
+  void clip(Path2D path, optional CanvasWindingRule winding = "nonzero");
+// NOT IMPLEMENTED  void resetClip();
+  boolean isPointInPath(unrestricted double x, unrestricted double y, optional CanvasWindingRule winding = "nonzero");
+  boolean isPointInPath(Path2D path, unrestricted double x, unrestricted double y, optional CanvasWindingRule winding = "nonzero");
+  boolean isPointInStroke(double x, double y);
+  boolean isPointInStroke(Path2D path, unrestricted double x, unrestricted double y);
+
+  // text (see also the CanvasDrawingStyles interface)
+  [Throws, LenientFloat]
+  void fillText(DOMString text, double x, double y, optional double maxWidth);
+  [Throws, LenientFloat]
+  void strokeText(DOMString text, double x, double y, optional double maxWidth);
+  [NewObject, Throws]
+  TextMetrics measureText(DOMString text);
+
+  // drawing images
+  attribute boolean imageSmoothingEnabled;
+
+  [Throws, LenientFloat]
+  void drawImage(CanvasImageSource image, double dx, double dy);
+  [Throws, LenientFloat]
+  void drawImage(CanvasImageSource image, double dx, double dy, double dw, double dh);
+  [Throws, LenientFloat]
+  void drawImage(CanvasImageSource image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh);
+
+  // hit regions
+  [Pref="canvas.hitregions.enabled", Throws] void addHitRegion(optional HitRegionOptions options);
+  [Pref="canvas.hitregions.enabled"] void removeHitRegion(DOMString id);
+  [Pref="canvas.hitregions.enabled"] void clearHitRegions();
+
+  // pixel manipulation
+  [NewObject, Throws]
+  ImageData createImageData(double sw, double sh);
+  [NewObject, Throws]
+  ImageData createImageData(ImageData imagedata);
+  [NewObject, Throws]
+  ImageData getImageData(double sx, double sy, double sw, double sh);
+  [Throws]
+  void putImageData(ImageData imagedata, double dx, double dy);
+  [Throws]
+  void putImageData(ImageData imagedata, double dx, double dy, double dirtyX, double dirtyY, double dirtyWidth, double dirtyHeight);
+
+  // Mozilla-specific stuff
+  // FIXME Bug 768048 mozCurrentTransform/mozCurrentTransformInverse should return a WebIDL array.
+  [Throws]
+  attribute object mozCurrentTransform; // [ m11, m12, m21, m22, dx, dy ], i.e. row major
+  [Throws]
+  attribute object mozCurrentTransformInverse;
+
+  [SetterThrows]
+  attribute DOMString mozTextStyle;
+
+  // image smoothing mode -- if disabled, images won't be smoothed
+  // if scaled.
+  [Deprecated="PrefixedImageSmoothingEnabled"]
+  attribute boolean mozImageSmoothingEnabled;
+
+  // Show the caret if appropriate when drawing
+  [ChromeOnly]
+  const unsigned long DRAWWINDOW_DRAW_CARET   = 0x01;
+  // Don't flush pending layout notifications that could otherwise
+  // be batched up
+  [ChromeOnly]
+  const unsigned long DRAWWINDOW_DO_NOT_FLUSH = 0x02;
+  // Draw scrollbars and scroll the viewport if they are present
+  [ChromeOnly]
+  const unsigned long DRAWWINDOW_DRAW_VIEW    = 0x04;
+  // Use the widget layer manager if available. This means hardware
+  // acceleration may be used, but it might actually be slower or
+  // lower quality than normal. It will however more accurately reflect
+  // the pixels rendered to the screen.
+  [ChromeOnly]
+  const unsigned long DRAWWINDOW_USE_WIDGET_LAYERS = 0x08;
+  // Don't synchronously decode images - draw what we have
+  [ChromeOnly]
+  const unsigned long DRAWWINDOW_ASYNC_DECODE_IMAGES = 0x10;
+
+  /**
+   * Renders a region of a window into the canvas.  The contents of
+   * the window's viewport are rendered, ignoring viewport clipping
+   * and scrolling.
+   *
+   * @param x
+   * @param y
+   * @param w
+   * @param h specify the area of the window to render, in CSS
+   * pixels.
+   *
+   * @param backgroundColor the canvas is filled with this color
+   * before we render the window into it. This color may be
+   * transparent/translucent. It is given as a CSS color string
+   * (e.g., rgb() or rgba()).
+   *
+   * @param flags Used to better control the drawWindow call.
+   * Flags can be ORed together.
+   *
+   * Of course, the rendering obeys the current scale, transform and
+   * globalAlpha values.
+   *
+   * Hints:
+   * -- If 'rgba(0,0,0,0)' is used for the background color, the
+   * drawing will be transparent wherever the window is transparent.
+   * -- Top-level browsed documents are usually not transparent
+   * because the user's background-color preference is applied,
+   * but IFRAMEs are transparent if the page doesn't set a background.
+   * -- If an opaque color is used for the background color, rendering
+   * will be faster because we won't have to compute the window's
+   * transparency.
+   *
+   * This API cannot currently be used by Web content. It is chrome
+   * only.
+   */
+  [Throws, ChromeOnly]
+  void drawWindow(Window window, double x, double y, double w, double h,
+                  DOMString bgColor, optional unsigned long flags = 0);
+  [Throws, ChromeOnly]
+  void asyncDrawXULElement(XULElement elem, double x, double y, double w,
+                           double h, DOMString bgColor,
+                           optional unsigned long flags = 0);
+
+  /**
+   * This causes a context that is currently using a hardware-accelerated
+   * backend to fallback to a software one. All state should be preserved.
+   */
+  [ChromeOnly]
+  void demote();
+};
+CanvasRenderingContext2D implements CanvasDrawingStyles;
+CanvasRenderingContext2D implements CanvasPathMethods;
+
+[NoInterfaceObject]
+interface CanvasDrawingStyles {
+  // line caps/joins
+           [LenientFloat]
+           attribute double lineWidth; // (default 1)
+           attribute DOMString lineCap; // "butt", "round", "square" (default "butt")
+           [GetterThrows]
+           attribute DOMString lineJoin; // "round", "bevel", "miter" (default "miter")
+           [LenientFloat]
+           attribute double miterLimit; // (default 10)
+
+  // dashed lines
+    [LenientFloat, Throws] void setLineDash(sequence<double> segments); // default empty
+    sequence<double> getLineDash();
+    [LenientFloat] attribute double lineDashOffset;
+
+  // text
+           [SetterThrows]
+           attribute DOMString font; // (default 10px sans-serif)
+           attribute DOMString textAlign; // "start", "end", "left", "right", "center" (default: "start")
+           attribute DOMString textBaseline; // "top", "hanging", "middle", "alphabetic", "ideographic", "bottom" (default: "alphabetic")
+};
+
+[NoInterfaceObject]
+interface CanvasPathMethods {
+  // shared path API methods
+  void closePath();
+  [LenientFloat]
+  void moveTo(double x, double y);
+  [LenientFloat]
+  void lineTo(double x, double y);
+  [LenientFloat]
+  void quadraticCurveTo(double cpx, double cpy, double x, double y);
+
+  [LenientFloat]
+  void bezierCurveTo(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y);
+
+  [Throws, LenientFloat]
+  void arcTo(double x1, double y1, double x2, double y2, double radius); 
+// NOT IMPLEMENTED  [LenientFloat] void arcTo(double x1, double y1, double x2, double y2, double radiusX, double radiusY, double rotation);
+
+  [LenientFloat]
+  void rect(double x, double y, double w, double h);
+
+  [Throws, LenientFloat]
+  void arc(double x, double y, double radius, double startAngle, double endAngle, optional boolean anticlockwise = false); 
+
+  [Throws, LenientFloat]
+  void ellipse(double x, double y, double radiusX, double radiusY, double rotation, double startAngle, double endAngle, optional boolean anticlockwise = false);
+};
+
+interface CanvasGradient {
+  // opaque object
+  [Throws]
+  // addColorStop should take a double
+  void addColorStop(float offset, DOMString color);
+};
+
+interface CanvasPattern {
+  // opaque object
+  // [Throws, LenientFloat] - could not do this overload because of bug 1020975
+  // void setTransform(double a, double b, double c, double d, double e, double f);
+
+  // No throw necessary here - SVGMatrix is always good.
+  void setTransform(SVGMatrix matrix);
+};
+
+interface TextMetrics {
+
+  // x-direction
+  readonly attribute double width; // advance width
+
+  /*
+   * NOT IMPLEMENTED YET
+
+  readonly attribute double actualBoundingBoxLeft;
+  readonly attribute double actualBoundingBoxRight;
+
+  // y-direction
+  readonly attribute double fontBoundingBoxAscent;
+  readonly attribute double fontBoundingBoxDescent;
+  readonly attribute double actualBoundingBoxAscent;
+  readonly attribute double actualBoundingBoxDescent;
+  readonly attribute double emHeightAscent;
+  readonly attribute double emHeightDescent;
+  readonly attribute double hangingBaseline;
+  readonly attribute double alphabeticBaseline;
+  readonly attribute double ideographicBaseline;
+  */
+
+};
+
+[Pref="canvas.path.enabled",
+ Constructor,
+ Constructor(Path2D other),
+ Constructor(DOMString pathString)]
+interface Path2D
+{
+  void addPath(Path2D path, optional SVGMatrix transformation);
+};
+Path2D implements CanvasPathMethods;
diff --git a/dom/webidl/CaretPosition.webidl b/dom/webidl/CaretPosition.webidl
new file mode 100644
index 000000000..5907b40d5
--- /dev/null
+++ b/dom/webidl/CaretPosition.webidl
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface CaretPosition {
+
+  /**
+   * The offsetNode could potentially be null due to anonymous content.
+   */
+  readonly attribute Node? offsetNode;
+  readonly attribute unsigned long offset;
+
+};
+
+/**
+ * Gecko specific methods and properties for CaretPosition.
+ */
+partial interface CaretPosition {
+  DOMRect? getClientRect();
+};
diff --git a/dom/webidl/CaretStateChangedEvent.webidl b/dom/webidl/CaretStateChangedEvent.webidl
new file mode 100644
index 000000000..39edd4d8f
--- /dev/null
+++ b/dom/webidl/CaretStateChangedEvent.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+enum CaretChangedReason {
+  "visibilitychange",
+  "updateposition",
+  "longpressonemptycontent",
+  "taponcaret",
+  "presscaret",
+  "releasecaret",
+  "scroll"
+};
+
+dictionary CaretStateChangedEventInit : EventInit {
+  boolean collapsed = true;
+  DOMRectReadOnly? boundingClientRect = null;
+  CaretChangedReason reason = "visibilitychange";
+  boolean caretVisible = false;
+  boolean caretVisuallyVisible = false;
+  boolean selectionVisible = false;
+  boolean selectionEditable = false;
+  DOMString selectedTextContent = "";
+};
+
+[Constructor(DOMString type, optional CaretStateChangedEventInit eventInit),
+ ChromeOnly]
+interface CaretStateChangedEvent : Event {
+  readonly attribute boolean collapsed;
+  readonly attribute DOMRectReadOnly? boundingClientRect;
+  readonly attribute CaretChangedReason reason;
+  readonly attribute boolean caretVisible;
+  readonly attribute boolean caretVisuallyVisible;
+  readonly attribute boolean selectionVisible;
+  readonly attribute boolean selectionEditable;
+  readonly attribute DOMString selectedTextContent;
+};
diff --git a/dom/webidl/ChannelMergerNode.webidl b/dom/webidl/ChannelMergerNode.webidl
new file mode 100644
index 000000000..a1a7148f2
--- /dev/null
+++ b/dom/webidl/ChannelMergerNode.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface ChannelMergerNode : AudioNode {
+
+};
+
diff --git a/dom/webidl/ChannelSplitterNode.webidl b/dom/webidl/ChannelSplitterNode.webidl
new file mode 100644
index 000000000..c7c0be498
--- /dev/null
+++ b/dom/webidl/ChannelSplitterNode.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface ChannelSplitterNode : AudioNode {
+
+};
+
diff --git a/dom/webidl/CharacterData.webidl b/dom/webidl/CharacterData.webidl
new file mode 100644
index 000000000..8d6a214e5
--- /dev/null
+++ b/dom/webidl/CharacterData.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#characterdata
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface CharacterData : Node {
+  [TreatNullAs=EmptyString, Pure, SetterThrows]
+  attribute DOMString data;
+  [Pure]
+  readonly attribute unsigned long length;
+  [Throws]
+  DOMString substringData(unsigned long offset, unsigned long count);
+  [Throws]
+  void appendData(DOMString data);
+  [Throws]
+  void insertData(unsigned long offset, DOMString data);
+  [Throws]
+  void deleteData(unsigned long offset, unsigned long count);
+  [Throws]
+  void replaceData(unsigned long offset, unsigned long count, DOMString data);
+};
+
+CharacterData implements ChildNode;
+CharacterData implements NonDocumentTypeChildNode;
diff --git a/dom/webidl/CheckerboardReportService.webidl b/dom/webidl/CheckerboardReportService.webidl
new file mode 100644
index 000000000..d5a624e0f
--- /dev/null
+++ b/dom/webidl/CheckerboardReportService.webidl
@@ -0,0 +1,58 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * This file declares data structures used to communicate checkerboard reports
+ * from C++ code to about:checkerboard (see bug 1238042). These dictionaries
+ * are NOT exposed to standard web content.
+ */
+
+enum CheckerboardReason {
+  "severe",
+  "recent"
+};
+
+// Individual checkerboard report. Contains fields for the severity of the
+// checkerboard event, the timestamp at which it was reported, the detailed
+// log of the event, and the reason this report was saved (currently either
+// "severe" or "recent").
+dictionary CheckerboardReport {
+  unsigned long severity;
+  DOMTimeStamp timestamp; // milliseconds since epoch
+  DOMString log;
+  CheckerboardReason reason;
+};
+
+// The guard function only allows creation of this interface on the
+// about:checkerboard page, and only if it's in the parent process.
+[Func="mozilla::dom::CheckerboardReportService::IsEnabled",
+ Constructor]
+interface CheckerboardReportService {
+  /**
+   * Gets the available checkerboard reports.
+   */
+  sequence<CheckerboardReport> getReports();
+
+  /**
+   * Gets the state of the apz.record_checkerboarding pref.
+   */
+  boolean isRecordingEnabled();
+
+  /**
+   * Sets the state of the apz.record_checkerboarding pref.
+   */
+  void setRecordingEnabled(boolean aEnabled);
+
+  /**
+   * Flush any in-progress checkerboard reports. Since this happens
+   * asynchronously, the caller may register an observer with the observer
+   * service to be notified when this operation is complete. The observer should
+   * listen for the topic "APZ:FlushActiveCheckerboard:Done". Upon receiving
+   * this notification, the caller may call getReports() to obtain the flushed
+   * reports, along with any other reports that are available.
+   */
+  void flushActiveReports();
+};
diff --git a/dom/webidl/ChildNode.webidl b/dom/webidl/ChildNode.webidl
new file mode 100644
index 000000000..ae36cd93e
--- /dev/null
+++ b/dom/webidl/ChildNode.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#interface-childnode
+ */
+
+[NoInterfaceObject]
+interface ChildNode {
+  [CEReactions, Throws, Unscopable]
+  void before((Node or DOMString)... nodes);
+  [CEReactions, Throws, Unscopable]
+  void after((Node or DOMString)... nodes);
+  [CEReactions, Throws, Unscopable]
+  void replaceWith((Node or DOMString)... nodes);
+  [CEReactions, Unscopable]
+  void remove();
+};
+
+[NoInterfaceObject]
+interface NonDocumentTypeChildNode {
+  [Pure]
+  readonly attribute Element? previousElementSibling;
+  [Pure]
+  readonly attribute Element? nextElementSibling;
+};
diff --git a/dom/webidl/ChromeNodeList.webidl b/dom/webidl/ChromeNodeList.webidl
new file mode 100644
index 000000000..3f062f2a3
--- /dev/null
+++ b/dom/webidl/ChromeNodeList.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor, Func="IsChromeOrXBL"]
+interface ChromeNodeList : NodeList {
+  [Throws]
+  void append(Node aNode);
+  [Throws]
+  void remove(Node aNode);
+};
diff --git a/dom/webidl/ChromeUtils.webidl b/dom/webidl/ChromeUtils.webidl
new file mode 100644
index 000000000..a66590e84
--- /dev/null
+++ b/dom/webidl/ChromeUtils.webidl
@@ -0,0 +1,92 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * A collection of static utility methods that are only exposed to Chrome. This
+ * interface is not exposed in workers, while ThreadSafeChromeUtils is.
+ */
+[ChromeOnly, Exposed=(Window,System)]
+interface ChromeUtils : ThreadSafeChromeUtils {
+  /**
+   * A helper that converts OriginAttributesDictionary to a opaque suffix string.
+   *
+   * @param originAttrs       The originAttributes from the caller.
+   */
+  static ByteString
+  originAttributesToSuffix(optional OriginAttributesDictionary originAttrs);
+
+  /**
+   * Returns true if the members of |originAttrs| match the provided members
+   * of |pattern|.
+   *
+   * @param originAttrs       The originAttributes under consideration.
+   * @param pattern           The pattern to use for matching.
+   */
+  static boolean
+  originAttributesMatchPattern(optional OriginAttributesDictionary originAttrs,
+                               optional OriginAttributesPatternDictionary pattern);
+
+  /**
+   * Returns an OriginAttributesDictionary with values from the |origin| suffix
+   * and unspecified attributes added and assigned default values.
+   *
+   * @param origin            The origin URI to create from.
+   * @returns                 An OriginAttributesDictionary with values from
+   *                          the origin suffix and unspecified attributes
+   *                          added and assigned default values.
+   */
+  [Throws]
+  static OriginAttributesDictionary
+  createOriginAttributesFromOrigin(DOMString origin);
+
+  /**
+   * Returns an OriginAttributesDictionary that is a copy of |originAttrs| with
+   * unspecified attributes added and assigned default values.
+   *
+   * @param originAttrs       The origin attributes to copy.
+   * @returns                 An OriginAttributesDictionary copy of |originAttrs|
+   *                          with unspecified attributes added and assigned
+   *                          default values.
+   */
+  static OriginAttributesDictionary
+  fillNonDefaultOriginAttributes(optional OriginAttributesDictionary originAttrs);
+
+  /**
+   * Returns true if the 2 OriginAttributes are equal.
+   */
+  static boolean
+  isOriginAttributesEqual(optional OriginAttributesDictionary aA,
+                          optional OriginAttributesDictionary aB);
+};
+
+/**
+ * Used by principals and the script security manager to represent origin
+ * attributes. The first dictionary is designed to contain the full set of
+ * OriginAttributes, the second is used for pattern-matching (i.e. does this
+ * OriginAttributesDictionary match the non-empty attributes in this pattern).
+ *
+ * IMPORTANT: If you add any members here, you need to do the following:
+ * (1) Add them to both dictionaries.
+ * (2) Update the methods on mozilla::OriginAttributes, including equality,
+ *     serialization, deserialization, and inheritance.
+ * (3) Update the methods on mozilla::OriginAttributesPattern, including matching.
+ */
+dictionary OriginAttributesDictionary {
+  unsigned long appId = 0;
+  unsigned long userContextId = 0;
+  boolean inIsolatedMozBrowser = false;
+  DOMString addonId = "";
+  unsigned long privateBrowsingId = 0;
+  DOMString firstPartyDomain = "";
+};
+dictionary OriginAttributesPatternDictionary {
+  unsigned long appId;
+  unsigned long userContextId;
+  boolean inIsolatedMozBrowser;
+  DOMString addonId;
+  unsigned long privateBrowsingId;
+  DOMString firstPartyDomain;
+};
diff --git a/dom/webidl/Client.webidl b/dom/webidl/Client.webidl
new file mode 100644
index 000000000..3e79c6a63
--- /dev/null
+++ b/dom/webidl/Client.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+[Exposed=ServiceWorker]
+interface Client {
+  readonly attribute USVString url;
+  readonly attribute FrameType frameType;
+  readonly attribute DOMString id;
+
+  [Throws]
+  void postMessage(any message, optional sequence<Transferable> transfer);
+};
+
+[Exposed=ServiceWorker]
+interface WindowClient : Client {
+  readonly attribute VisibilityState visibilityState;
+  readonly attribute boolean focused;
+
+  [Throws, NewObject]
+  Promise<WindowClient> focus();
+
+  [Throws, NewObject]
+  Promise<WindowClient> navigate(USVString url);
+};
+
+enum FrameType {
+  "auxiliary",
+  "top-level",
+  "nested",
+  "none"
+};
diff --git a/dom/webidl/Clients.webidl b/dom/webidl/Clients.webidl
new file mode 100644
index 000000000..ebe7bf8f2
--- /dev/null
+++ b/dom/webidl/Clients.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+[Exposed=ServiceWorker]
+interface Clients {
+  // The objects returned will be new instances every time
+  [NewObject]
+  Promise<any> get(DOMString id);
+  [NewObject]
+  Promise<sequence<Client>> matchAll(optional ClientQueryOptions options);
+  [NewObject,
+   Func="mozilla::dom::ServiceWorkerGlobalScope::OpenWindowEnabled"]
+  Promise<WindowClient?> openWindow(USVString url);
+  [NewObject]
+  Promise<void> claim();
+};
+
+dictionary ClientQueryOptions {
+  boolean includeUncontrolled = false;
+  ClientType type = "window";
+};
+
+enum ClientType {
+  "window",
+  "worker",
+  "sharedworker",
+  "all"
+};
+
diff --git a/dom/webidl/ClipboardEvent.webidl b/dom/webidl/ClipboardEvent.webidl
new file mode 100644
index 000000000..8fe8a4935
--- /dev/null
+++ b/dom/webidl/ClipboardEvent.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/clipops/#x5-clipboard-event-interfaces
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional ClipboardEventInit eventInitDict)]
+interface ClipboardEvent : Event
+{
+  readonly attribute DataTransfer? clipboardData;
+};
+
+dictionary ClipboardEventInit : EventInit
+{
+  DOMString data = "";
+  DOMString dataType = "";
+};
diff --git a/dom/webidl/CloseEvent.webidl b/dom/webidl/CloseEvent.webidl
new file mode 100644
index 000000000..946fdbebd
--- /dev/null
+++ b/dom/webidl/CloseEvent.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The nsIDOMCloseEvent interface is the interface to the event
+ * close on a WebSocket object.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/network.html#closeevent
+ */
+
+[Constructor(DOMString type, optional CloseEventInit eventInitDict),LegacyEventInit]
+interface CloseEvent : Event
+{
+  readonly attribute boolean wasClean;
+  readonly attribute unsigned short code;
+  readonly attribute DOMString reason;
+};
+
+dictionary CloseEventInit : EventInit
+{
+  boolean wasClean = false;
+  unsigned short code = 0;
+  DOMString reason = "";
+};
diff --git a/dom/webidl/CommandEvent.webidl b/dom/webidl/CommandEvent.webidl
new file mode 100644
index 000000000..9856c77c3
--- /dev/null
+++ b/dom/webidl/CommandEvent.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface CommandEvent : Event {
+  readonly attribute DOMString? command;
+
+  void initCommandEvent(DOMString type,
+                        optional boolean canBubble = false,
+                        optional boolean cancelable = false,
+                        optional DOMString? command = null);
+};
diff --git a/dom/webidl/Comment.webidl b/dom/webidl/Comment.webidl
new file mode 100644
index 000000000..023335f16
--- /dev/null
+++ b/dom/webidl/Comment.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#comment
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(optional DOMString data = "")]
+interface Comment : CharacterData {
+};
diff --git a/dom/webidl/CompositionEvent.webidl b/dom/webidl/CompositionEvent.webidl
new file mode 100644
index 000000000..e4a54d678
--- /dev/null
+++ b/dom/webidl/CompositionEvent.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#events-CompositionEvent
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface CompositionEvent : UIEvent
+{
+  readonly attribute DOMString? data;
+  readonly attribute DOMString  locale;
+
+ /**
+  * ranges is trying to expose TextRangeArray in Gecko so a
+  * js-plugin couble be able to know the clauses information
+  */
+  [ChromeOnly,Cached,Pure]
+  readonly attribute sequence<TextClause> ranges;
+};
+
+partial interface CompositionEvent
+{
+  void initCompositionEvent(DOMString typeArg,
+                            optional boolean canBubbleArg = false,
+                            optional boolean cancelableArg = false,
+                            optional Window? viewArg = null,
+                            optional DOMString? dataArg = null,
+                            optional DOMString localeArg = "");
+};
diff --git a/dom/webidl/Console.webidl b/dom/webidl/Console.webidl
new file mode 100644
index 000000000..c41c10383
--- /dev/null
+++ b/dom/webidl/Console.webidl
@@ -0,0 +1,108 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Exposed=(Window,Worker,WorkerDebugger,Worklet),
+ ClassString="Console",
+ ProtoObjectHack]
+namespace console {
+  void log(any... data);
+  void info(any... data);
+  void warn(any... data);
+  void error(any... data);
+  void _exception(any... data);
+  void debug(any... data);
+  void table(any... data);
+  void trace();
+  void dir(any... data);
+  void dirxml(any... data);
+  void group(any... data);
+  void groupCollapsed(any... data);
+  void groupEnd(any... data);
+  void time(optional any time);
+  void timeEnd(optional any time);
+  void timeStamp(optional any data);
+  void clear(any... data);
+
+  void profile(any... data);
+  void profileEnd(any... data);
+
+  void assert(boolean condition, any... data);
+  void count(any... data);
+
+  // No-op methods for compatibility with other browsers.
+  [BinaryName="noopMethod"]
+  void markTimeline();
+  [BinaryName="noopMethod"]
+  void timeline();
+  [BinaryName="noopMethod"]
+  void timelineEnd();
+
+  [ChromeOnly]
+  const boolean IS_NATIVE_CONSOLE = true;
+};
+
+// This is used to propagate console events to the observers.
+dictionary ConsoleEvent {
+  (unsigned long long or DOMString) ID;
+  (unsigned long long or DOMString) innerID;
+  any originAttributes = null;
+  DOMString level = "";
+  DOMString filename = "";
+  unsigned long lineNumber = 0;
+  unsigned long columnNumber = 0;
+  DOMString functionName = "";
+  double timeStamp = 0;
+  sequence<any> arguments;
+  sequence<DOMString?> styles;
+  boolean private = false;
+  // stacktrace is handled via a getter in some cases so we can construct it
+  // lazily.  Note that we're not making this whole thing an interface because
+  // consumers expect to see own properties on it, which would mean making the
+  // props unforgeable, which means lots of JSFunction allocations.  Maybe we
+  // should fix those consumers, of course....
+  // sequence<ConsoleStackEntry> stacktrace;
+  DOMString groupName = "";
+  any timer = null;
+  any counter = null;
+};
+
+// Event for profile operations
+dictionary ConsoleProfileEvent {
+  DOMString action = "";
+  sequence<any> arguments;
+};
+
+// This dictionary is used to manage stack trace data.
+dictionary ConsoleStackEntry {
+  DOMString filename = "";
+  unsigned long lineNumber = 0;
+  unsigned long columnNumber = 0;
+  DOMString functionName = "";
+  unsigned long language = 0;
+  DOMString? asyncCause;
+};
+
+dictionary ConsoleTimerStart {
+  DOMString name = "";
+  double started = 0;
+};
+
+dictionary ConsoleTimerEnd {
+  DOMString name = "";
+  double duration = 0;
+};
+
+dictionary ConsoleTimerError {
+  DOMString error = "maxTimersExceeded";
+};
+
+dictionary ConsoleCounter {
+  DOMString label = "";
+  unsigned long count = 0;
+};
+
+dictionary ConsoleCounterError {
+  DOMString error = "maxCountersExceeded";
+};
diff --git a/dom/webidl/ConstantSourceNode.webidl b/dom/webidl/ConstantSourceNode.webidl
new file mode 100644
index 000000000..eabdc304c
--- /dev/null
+++ b/dom/webidl/ConstantSourceNode.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary ConstantSourceOptions {
+    float offset = 1;
+};
+
+[Pref="dom.webaudio.enabled",
+ Constructor(AudioContext context, optional ConstantSourceOptions options)]
+interface ConstantSourceNode : AudioNode {
+    readonly        attribute AudioParam   offset;
+                    attribute EventHandler onended;
+    [Throws, UnsafeInPrerendering]
+    void start (optional double when = 0);
+    [Throws, UnsafeInPrerendering]
+    void stop (optional double when = 0);
+};
diff --git a/dom/webidl/ContainerBoxObject.webidl b/dom/webidl/ContainerBoxObject.webidl
new file mode 100644
index 000000000..f2dd9ffa5
--- /dev/null
+++ b/dom/webidl/ContainerBoxObject.webidl
@@ -0,0 +1,12 @@
+
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[NoInterfaceObject]
+interface ContainerBoxObject : BoxObject {
+    [ChromeOnly]
+    readonly attribute nsIDocShell? docShell;
+};
diff --git a/dom/webidl/ConvolverNode.webidl b/dom/webidl/ConvolverNode.webidl
new file mode 100644
index 000000000..b49af0400
--- /dev/null
+++ b/dom/webidl/ConvolverNode.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface ConvolverNode : AudioNode {
+
+      [SetterThrows]
+      attribute AudioBuffer? buffer;
+      attribute boolean normalize;
+
+};
+
+// Mozilla extension
+ConvolverNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Coordinates.webidl b/dom/webidl/Coordinates.webidl
new file mode 100644
index 000000000..840782f74
--- /dev/null
+++ b/dom/webidl/Coordinates.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/geolocation-API
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface Coordinates {
+  readonly attribute double latitude;
+  readonly attribute double longitude;
+  readonly attribute double? altitude;
+  readonly attribute double accuracy;
+  readonly attribute double? altitudeAccuracy;
+  readonly attribute double? heading;
+  readonly attribute double? speed;
+};
diff --git a/dom/webidl/CreateOfferRequest.webidl b/dom/webidl/CreateOfferRequest.webidl
new file mode 100644
index 000000000..134fe33fa
--- /dev/null
+++ b/dom/webidl/CreateOfferRequest.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This is an internal IDL file
+ */
+
+[ChromeOnly,
+ JSImplementation="@mozilla.org/dom/createofferrequest;1"]
+interface CreateOfferRequest {
+  readonly attribute unsigned long long windowID;
+  readonly attribute unsigned long long innerWindowID;
+  readonly attribute DOMString callID;
+  readonly attribute boolean isSecure;
+};
diff --git a/dom/webidl/Crypto.webidl b/dom/webidl/Crypto.webidl
new file mode 100644
index 000000000..31574a219
--- /dev/null
+++ b/dom/webidl/Crypto.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#crypto-interface
+ */
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface GlobalCrypto {
+  [Throws] readonly attribute Crypto crypto;
+};
+
+[Exposed=(Window,Worker)]
+interface Crypto {
+  readonly attribute SubtleCrypto subtle;
+
+  [Throws]
+  ArrayBufferView getRandomValues(ArrayBufferView array);
+};
diff --git a/dom/webidl/CustomElementRegistry.webidl b/dom/webidl/CustomElementRegistry.webidl
new file mode 100644
index 000000000..788b6a4ed
--- /dev/null
+++ b/dom/webidl/CustomElementRegistry.webidl
@@ -0,0 +1,19 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// https://html.spec.whatwg.org/#dom-window-customelements
+[Func="CustomElementRegistry::IsCustomElementEnabled"]
+interface CustomElementRegistry {
+  [CEReactions, Throws]
+  void define(DOMString name, Function functionConstructor,
+              optional ElementDefinitionOptions options);
+  any get(DOMString name);
+  [Throws]
+  Promise<void> whenDefined(DOMString name);
+};
+
+dictionary ElementDefinitionOptions {
+  DOMString extends;
+};
+
diff --git a/dom/webidl/CustomEvent.webidl b/dom/webidl/CustomEvent.webidl
new file mode 100644
index 000000000..1ea5572b7
--- /dev/null
+++ b/dom/webidl/CustomEvent.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional CustomEventInit eventInitDict),
+ Exposed=(Window, Worker)]
+interface CustomEvent : Event
+{
+  readonly attribute any detail;
+
+  // initCustomEvent is a Gecko specific deprecated method.
+  [Throws]
+  void initCustomEvent(DOMString type,
+                       optional boolean canBubble = false,
+                       optional boolean cancelable = false,
+                       optional any detail = null);
+};
+
+dictionary CustomEventInit : EventInit
+{
+  any detail = null;
+};
diff --git a/dom/webidl/DOMCursor.webidl b/dom/webidl/DOMCursor.webidl
new file mode 100644
index 000000000..f5d0447ea
--- /dev/null
+++ b/dom/webidl/DOMCursor.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Exposed=(Window,Worker)]
+interface DOMCursor : EventTarget {
+  readonly attribute boolean done;
+  [Throws]
+  void continue();
+};
+
+DOMCursor implements DOMRequestShared;
diff --git a/dom/webidl/DOMError.webidl b/dom/webidl/DOMError.webidl
new file mode 100644
index 000000000..bd4a7b39d
--- /dev/null
+++ b/dom/webidl/DOMError.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#domerror
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString name, optional DOMString message = ""),
+ Exposed=(Window,Worker,System)]
+interface DOMError {
+  [Constant]
+  readonly attribute DOMString name;
+
+  [Constant]
+  readonly attribute DOMString message;
+};
diff --git a/dom/webidl/DOMException.webidl b/dom/webidl/DOMException.webidl
new file mode 100644
index 000000000..e91e20cca
--- /dev/null
+++ b/dom/webidl/DOMException.webidl
@@ -0,0 +1,110 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#exception-domexception
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+
+// This is the WebIDL version of nsIException.  This is mostly legacy stuff.
+
+interface StackFrame;
+
+[NoInterfaceObject,
+ Exposed=(Window,Worker)]
+interface ExceptionMembers
+{
+  // A custom message set by the thrower.  LenientThis so it can be
+  // gotten on the prototype, which Error.prototype.toString will do
+  // if someone tries to stringify DOMException.prototype.
+  [LenientThis]
+  readonly attribute DOMString               message;
+  // The nsresult associated with this exception.
+  readonly attribute unsigned long           result;
+  // The name of the error code (ie, a string repr of |result|).
+  // LenientThis so it can be gotten on the prototype, which
+  // Error.prototype.toString will do if someone tries to stringify
+  // DOMException.prototype.
+  [LenientThis]
+  readonly attribute DOMString               name;
+
+  // Filename location.  This is the location that caused the
+  // error, which may or may not be a source file location.
+  // For example, standard language errors would generally have
+  // the same location as their top stack entry.  File
+  // parsers may put the location of the file they were parsing,
+  // etc.
+
+  // null indicates "no data"
+  readonly attribute DOMString               filename;
+  // Valid line numbers begin at '1'. '0' indicates unknown.
+  readonly attribute unsigned long           lineNumber;
+  // Valid column numbers begin at 0. 
+  // We don't have an unambiguous indicator for unknown.
+  readonly attribute unsigned long           columnNumber;
+
+  // A stack trace, if available.  nsIStackFrame does not have classinfo so
+  // this was only ever usefully available to chrome JS.
+  [ChromeOnly, Exposed=Window]
+  readonly attribute StackFrame?             location;
+
+  // Arbitary data for the implementation.
+  [Exposed=Window]
+  readonly attribute nsISupports?            data;
+
+  // Formatted exception stack
+  [Throws, Replaceable]
+  readonly attribute DOMString               stack;
+};
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface Exception {
+  // A generic formatter - make it suitable to print, etc.
+  stringifier;
+};
+
+Exception implements ExceptionMembers;
+
+// XXXkhuey this is an 'exception', not an interface, but we don't have any
+// parser or codegen mechanisms for dealing with exceptions.
+[ExceptionClass,
+ Exposed=(Window, Worker),
+ Constructor(optional DOMString message = "", optional DOMString name)]
+interface DOMException {
+  const unsigned short INDEX_SIZE_ERR = 1;
+  const unsigned short DOMSTRING_SIZE_ERR = 2; // historical
+  const unsigned short HIERARCHY_REQUEST_ERR = 3;
+  const unsigned short WRONG_DOCUMENT_ERR = 4;
+  const unsigned short INVALID_CHARACTER_ERR = 5;
+  const unsigned short NO_DATA_ALLOWED_ERR = 6; // historical
+  const unsigned short NO_MODIFICATION_ALLOWED_ERR = 7;
+  const unsigned short NOT_FOUND_ERR = 8;
+  const unsigned short NOT_SUPPORTED_ERR = 9;
+  const unsigned short INUSE_ATTRIBUTE_ERR = 10; // historical
+  const unsigned short INVALID_STATE_ERR = 11;
+  const unsigned short SYNTAX_ERR = 12;
+  const unsigned short INVALID_MODIFICATION_ERR = 13;
+  const unsigned short NAMESPACE_ERR = 14;
+  const unsigned short INVALID_ACCESS_ERR = 15;
+  const unsigned short VALIDATION_ERR = 16; // historical
+  const unsigned short TYPE_MISMATCH_ERR = 17; // historical; use JavaScript's TypeError instead
+  const unsigned short SECURITY_ERR = 18;
+  const unsigned short NETWORK_ERR = 19;
+  const unsigned short ABORT_ERR = 20;
+  const unsigned short URL_MISMATCH_ERR = 21;
+  const unsigned short QUOTA_EXCEEDED_ERR = 22;
+  const unsigned short TIMEOUT_ERR = 23;
+  const unsigned short INVALID_NODE_TYPE_ERR = 24;
+  const unsigned short DATA_CLONE_ERR = 25;
+
+  readonly attribute unsigned short code;
+};
+
+// XXXkhuey copy all of Gecko's non-standard stuff onto DOMException, but leave
+// the prototype chain sane.
+DOMException implements ExceptionMembers;
diff --git a/dom/webidl/DOMImplementation.webidl b/dom/webidl/DOMImplementation.webidl
new file mode 100644
index 000000000..5fa3c8592
--- /dev/null
+++ b/dom/webidl/DOMImplementation.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#interface-domimplementation
+ *
+ * Copyright:
+ * To the extent possible under law, the editors have waived all copyright and
+ * related or neighboring rights to this work.
+ */
+
+interface DOMImplementation {
+  boolean hasFeature();
+
+  [Throws]
+  DocumentType createDocumentType(DOMString qualifiedName, DOMString publicId,
+                                  DOMString systemId);
+  [Throws]
+  Document createDocument(DOMString? namespace,
+                          [TreatNullAs=EmptyString] DOMString qualifiedName,
+                          optional DocumentType? doctype = null);
+  [Throws]
+  Document createHTMLDocument(optional DOMString title);
+};
diff --git a/dom/webidl/DOMMatrix.webidl b/dom/webidl/DOMMatrix.webidl
new file mode 100644
index 000000000..6b236ae66
--- /dev/null
+++ b/dom/webidl/DOMMatrix.webidl
@@ -0,0 +1,148 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/geometry/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="layout.css.DOMMatrix.enabled"]
+interface DOMMatrixReadOnly {
+    // These attributes are simple aliases for certain elements of the 4x4 matrix
+    readonly attribute unrestricted double a;
+    readonly attribute unrestricted double b;
+    readonly attribute unrestricted double c;
+    readonly attribute unrestricted double d;
+    readonly attribute unrestricted double e;
+    readonly attribute unrestricted double f;
+
+    readonly attribute unrestricted double m11;
+    readonly attribute unrestricted double m12;
+    readonly attribute unrestricted double m13;
+    readonly attribute unrestricted double m14;
+    readonly attribute unrestricted double m21;
+    readonly attribute unrestricted double m22;
+    readonly attribute unrestricted double m23;
+    readonly attribute unrestricted double m24;
+    readonly attribute unrestricted double m31;
+    readonly attribute unrestricted double m32;
+    readonly attribute unrestricted double m33;
+    readonly attribute unrestricted double m34;
+    readonly attribute unrestricted double m41;
+    readonly attribute unrestricted double m42;
+    readonly attribute unrestricted double m43;
+    readonly attribute unrestricted double m44;
+
+    // Immutable transform methods
+    DOMMatrix translate(unrestricted double tx,
+                        unrestricted double ty,
+                        optional unrestricted double tz = 0);
+    DOMMatrix scale(unrestricted double scale,
+                    optional unrestricted double originX = 0,
+                    optional unrestricted double originY = 0);
+    DOMMatrix scale3d(unrestricted double scale,
+                      optional unrestricted double originX = 0,
+                      optional unrestricted double originY = 0,
+                      optional unrestricted double originZ = 0);
+    DOMMatrix scaleNonUniform(unrestricted double scaleX,
+                              optional unrestricted double scaleY = 1,
+                              optional unrestricted double scaleZ = 1,
+                              optional unrestricted double originX = 0,
+                              optional unrestricted double originY = 0,
+                              optional unrestricted double originZ = 0);
+    DOMMatrix rotate(unrestricted double angle,
+                     optional unrestricted double originX = 0,
+                     optional unrestricted double originY = 0);
+    DOMMatrix rotateFromVector(unrestricted double x,
+                               unrestricted double y);
+    DOMMatrix rotateAxisAngle(unrestricted double x,
+                              unrestricted double y,
+                              unrestricted double z,
+                              unrestricted double angle);
+    DOMMatrix skewX(unrestricted double sx);
+    DOMMatrix skewY(unrestricted double sy);
+    DOMMatrix multiply(DOMMatrix other);
+    DOMMatrix flipX();
+    DOMMatrix flipY();
+    DOMMatrix inverse();
+
+    // Helper methods
+    readonly attribute boolean is2D;
+    readonly attribute boolean identity;
+    DOMPoint                   transformPoint(optional DOMPointInit point);
+    [Throws] Float32Array      toFloat32Array();
+    [Throws] Float64Array      toFloat64Array();
+                               stringifier;
+};
+
+[Pref="layout.css.DOMMatrix.enabled",
+ Constructor,
+ Constructor(DOMString transformList),
+ Constructor(DOMMatrixReadOnly other),
+ Constructor(Float32Array array32),
+ Constructor(Float64Array array64),
+ Constructor(sequence<unrestricted double> numberSequence)]
+interface DOMMatrix : DOMMatrixReadOnly {
+    // These attributes are simple aliases for certain elements of the 4x4 matrix
+    inherit attribute unrestricted double a;
+    inherit attribute unrestricted double b;
+    inherit attribute unrestricted double c;
+    inherit attribute unrestricted double d;
+    inherit attribute unrestricted double e;
+    inherit attribute unrestricted double f;
+
+    inherit attribute unrestricted double m11;
+    inherit attribute unrestricted double m12;
+    inherit attribute unrestricted double m13;
+    inherit attribute unrestricted double m14;
+    inherit attribute unrestricted double m21;
+    inherit attribute unrestricted double m22;
+    inherit attribute unrestricted double m23;
+    inherit attribute unrestricted double m24;
+    inherit attribute unrestricted double m31;
+    inherit attribute unrestricted double m32;
+    inherit attribute unrestricted double m33;
+    inherit attribute unrestricted double m34;
+    inherit attribute unrestricted double m41;
+    inherit attribute unrestricted double m42;
+    inherit attribute unrestricted double m43;
+    inherit attribute unrestricted double m44;
+
+    // Mutable transform methods
+    DOMMatrix multiplySelf(DOMMatrix other);
+    DOMMatrix preMultiplySelf(DOMMatrix other);
+    DOMMatrix translateSelf(unrestricted double tx,
+                            unrestricted double ty,
+                            optional unrestricted double tz = 0);
+    DOMMatrix scaleSelf(unrestricted double scale,
+                        optional unrestricted double originX = 0,
+                        optional unrestricted double originY = 0);
+    DOMMatrix scale3dSelf(unrestricted double scale,
+                          optional unrestricted double originX = 0,
+                          optional unrestricted double originY = 0,
+                          optional unrestricted double originZ = 0);
+    DOMMatrix scaleNonUniformSelf(unrestricted double scaleX,
+                                  optional unrestricted double scaleY = 1,
+                                  optional unrestricted double scaleZ = 1,
+                                  optional unrestricted double originX = 0,
+                                  optional unrestricted double originY = 0,
+                                  optional unrestricted double originZ = 0);
+    DOMMatrix rotateSelf(unrestricted double angle,
+                         optional unrestricted double originX = 0,
+                         optional unrestricted double originY = 0);
+    DOMMatrix rotateFromVectorSelf(unrestricted double x,
+                                  unrestricted double y);
+    DOMMatrix rotateAxisAngleSelf(unrestricted double x,
+                                  unrestricted double y,
+                                  unrestricted double z,
+                                  unrestricted double angle);
+    DOMMatrix skewXSelf(unrestricted double sx);
+    DOMMatrix skewYSelf(unrestricted double sy);
+    DOMMatrix invertSelf();
+    [Throws] DOMMatrix setMatrixValue(DOMString transformList);
+};
+
diff --git a/dom/webidl/DOMParser.webidl b/dom/webidl/DOMParser.webidl
new file mode 100644
index 000000000..154666697
--- /dev/null
+++ b/dom/webidl/DOMParser.webidl
@@ -0,0 +1,46 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://domparsing.spec.whatwg.org/#the-domparser-interface
+ */
+
+interface Principal;
+interface URI;
+interface InputStream;
+
+enum SupportedType {
+  "text/html",
+  "text/xml",
+  "application/xml",
+  "application/xhtml+xml",
+  "image/svg+xml"
+};
+
+// the latter is Mozilla-specific
+[Constructor,
+ Constructor(Principal? prin, optional URI? documentURI = null,
+             optional URI? baseURI = null)]
+interface DOMParser {
+  [NewObject, Throws]
+  Document parseFromString(DOMString str, SupportedType type);
+
+  // Mozilla-specific stuff
+  // Throws if the passed-in length is greater than the actual sequence length
+  [NewObject, Throws, ChromeOnly]
+  Document parseFromBuffer(sequence<octet> buf, unsigned long bufLen,
+                           SupportedType type);
+  // Throws if the passed-in length is greater than the actual typed array length
+  [NewObject, Throws, ChromeOnly]
+  Document parseFromBuffer(Uint8Array buf, unsigned long bufLen,
+                           SupportedType type);
+  [NewObject, Throws, ChromeOnly]
+  Document parseFromStream(InputStream stream, DOMString? charset,
+                           long contentLength, SupportedType type);
+  [Throws, ChromeOnly]
+  void init(optional Principal? principal = null,
+            optional URI? documentURI = null,
+            optional URI? baseURI = null);
+};
+
diff --git a/dom/webidl/DOMPoint.webidl b/dom/webidl/DOMPoint.webidl
new file mode 100644
index 000000000..d092d900f
--- /dev/null
+++ b/dom/webidl/DOMPoint.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/geometry/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="layout.css.DOMPoint.enabled"]
+interface DOMPointReadOnly {
+    readonly attribute unrestricted double x;
+    readonly attribute unrestricted double y;
+    readonly attribute unrestricted double z;
+    readonly attribute unrestricted double w; 
+};
+
+[Pref="layout.css.DOMPoint.enabled",
+ Constructor(optional DOMPointInit point),
+ Constructor(unrestricted double x, unrestricted double y,
+             optional unrestricted double z = 0, optional unrestricted double w = 1)]
+interface DOMPoint : DOMPointReadOnly {
+    inherit attribute unrestricted double x;
+    inherit attribute unrestricted double y;
+    inherit attribute unrestricted double z;
+    inherit attribute unrestricted double w;
+};
+
+dictionary DOMPointInit {
+    unrestricted double x = 0;
+    unrestricted double y = 0;
+    unrestricted double z = 0;
+    unrestricted double w = 1;
+};
\ No newline at end of file
diff --git a/dom/webidl/DOMQuad.webidl b/dom/webidl/DOMQuad.webidl
new file mode 100644
index 000000000..b933987d5
--- /dev/null
+++ b/dom/webidl/DOMQuad.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/geometry/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="layout.css.DOMQuad.enabled",
+ Constructor(optional DOMPointInit p1, optional DOMPointInit p2,
+             optional DOMPointInit p3, optional DOMPointInit p4),
+ Constructor(DOMRectReadOnly rect)]
+interface DOMQuad {
+    [SameObject] readonly attribute DOMPoint p1;
+    [SameObject] readonly attribute DOMPoint p2;
+    [SameObject] readonly attribute DOMPoint p3;
+    [SameObject] readonly attribute DOMPoint p4;
+    [SameObject] readonly attribute DOMRectReadOnly bounds;
+};
\ No newline at end of file
diff --git a/dom/webidl/DOMRect.webidl b/dom/webidl/DOMRect.webidl
new file mode 100644
index 000000000..24a07900c
--- /dev/null
+++ b/dom/webidl/DOMRect.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/geometry/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor,
+ Constructor(unrestricted double x, unrestricted double y,
+             unrestricted double width, unrestricted double height)]
+interface DOMRect : DOMRectReadOnly {
+    inherit attribute unrestricted double x;
+    inherit attribute unrestricted double y;
+    inherit attribute unrestricted double width;
+    inherit attribute unrestricted double height;
+};
+
+interface DOMRectReadOnly {
+    readonly attribute unrestricted double x;
+    readonly attribute unrestricted double y;
+    readonly attribute unrestricted double width;
+    readonly attribute unrestricted double height;
+    readonly attribute unrestricted double top;
+    readonly attribute unrestricted double right;
+    readonly attribute unrestricted double bottom;
+    readonly attribute unrestricted double left;
+};
+
+dictionary DOMRectInit {
+    unrestricted double x = 0;
+    unrestricted double y = 0;
+    unrestricted double width = 0;
+    unrestricted double height = 0;
+};
diff --git a/dom/webidl/DOMRectList.webidl b/dom/webidl/DOMRectList.webidl
new file mode 100644
index 000000000..172235e17
--- /dev/null
+++ b/dom/webidl/DOMRectList.webidl
@@ -0,0 +1,11 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ArrayClass]
+interface DOMRectList {
+  readonly attribute unsigned long length;
+  getter DOMRect? item(unsigned long index);
+};
diff --git a/dom/webidl/DOMRequest.webidl b/dom/webidl/DOMRequest.webidl
new file mode 100644
index 000000000..60dc022a4
--- /dev/null
+++ b/dom/webidl/DOMRequest.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+enum DOMRequestReadyState { "pending", "done" };
+
+[Exposed=(Window,Worker,System), NoInterfaceObject]
+interface DOMRequestShared {
+  readonly attribute DOMRequestReadyState readyState;
+
+  readonly attribute any result;
+  readonly attribute DOMError? error;
+
+  attribute EventHandler onsuccess;
+  attribute EventHandler onerror;
+};
+
+[Exposed=(Window,Worker,System)]
+interface DOMRequest : EventTarget {
+  // The [TreatNonCallableAsNull] annotation is required since then() should do
+  // nothing instead of throwing errors when non-callable arguments are passed.
+  // See documentation for Promise.then to see why we return "any".
+  [NewObject, Throws]
+  any then([TreatNonCallableAsNull] optional AnyCallback? fulfillCallback = null,
+           [TreatNonCallableAsNull] optional AnyCallback? rejectCallback = null);
+};
+
+DOMRequest implements DOMRequestShared;
diff --git a/dom/webidl/DOMStringList.webidl b/dom/webidl/DOMStringList.webidl
new file mode 100644
index 000000000..56c5836ff
--- /dev/null
+++ b/dom/webidl/DOMStringList.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,Worker,System)]
+interface DOMStringList {
+  readonly attribute unsigned long length;
+  getter DOMString? item(unsigned long index);
+  boolean contains(DOMString string);
+};
diff --git a/dom/webidl/DOMStringMap.webidl b/dom/webidl/DOMStringMap.webidl
new file mode 100644
index 000000000..a59910e0b
--- /dev/null
+++ b/dom/webidl/DOMStringMap.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#domstringmap-0
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[OverrideBuiltins]
+interface DOMStringMap {
+  getter DOMString (DOMString name);
+  [CEReactions, Throws]
+  setter creator void (DOMString name, DOMString value);
+  [CEReactions]
+  deleter void (DOMString name);
+};
diff --git a/dom/webidl/DOMTokenList.webidl b/dom/webidl/DOMTokenList.webidl
new file mode 100644
index 000000000..69663d055
--- /dev/null
+++ b/dom/webidl/DOMTokenList.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface DOMTokenList {
+  readonly attribute unsigned long length;
+  getter DOMString? item(unsigned long index);
+  boolean contains(DOMString token);
+  [CEReactions, Throws]
+  void add(DOMString... tokens);
+  [CEReactions, Throws]
+  void remove(DOMString... tokens);
+  [CEReactions, Throws]
+  void replace(DOMString token, DOMString newToken);
+  [CEReactions, Throws]
+  boolean toggle(DOMString token, optional boolean force);
+  [CEReactions, Throws]
+  boolean supports(DOMString token);
+  [CEReactions, SetterThrows]
+  attribute DOMString value;
+  stringifier DOMString ();
+  iterable<DOMString?>;
+};
diff --git a/dom/webidl/DataContainerEvent.webidl b/dom/webidl/DataContainerEvent.webidl
new file mode 100644
index 000000000..968421040
--- /dev/null
+++ b/dom/webidl/DataContainerEvent.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface nsIVariant;
+
+[ChromeOnly]
+interface DataContainerEvent : Event {
+  /**
+   * Return the data associated with the given key.
+   *
+   * @param  key  the key
+   * @return      the data associated with the key
+   */
+  nsIVariant? getData(DOMString? key);
+
+  /**
+   * Set the data for the given key.
+   *
+   * @param  key   the data key
+   * @param  data  the data
+   * @throws       NS_ERROR_UNEXPECTED if the method is called during event
+   *               dispatch
+   */
+  [Throws]
+  void setData(DOMString? key, any data);
+};
+
diff --git a/dom/webidl/DataTransfer.webidl b/dom/webidl/DataTransfer.webidl
new file mode 100644
index 000000000..dd44e1ddc
--- /dev/null
+++ b/dom/webidl/DataTransfer.webidl
@@ -0,0 +1,148 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-datatransfer-interface
+ */
+
+[Constructor]
+interface DataTransfer {
+           attribute DOMString dropEffect;
+           attribute DOMString effectAllowed;
+
+  readonly attribute DataTransferItemList items;
+
+  [Throws]
+  void setDragImage(Element image, long x, long y);
+
+  // ReturnValueNeedsContainsHack on .types because lots of extension
+  // code was expecting .contains() back when it was a DOMStringList.
+  [Pure, Cached, Frozen, NeedsSubjectPrincipal, ReturnValueNeedsContainsHack]
+  readonly attribute sequence<DOMString> types;
+  [Throws, NeedsSubjectPrincipal]
+  DOMString getData(DOMString format);
+  [Throws, NeedsSubjectPrincipal]
+  void setData(DOMString format, DOMString data);
+  [Throws, NeedsSubjectPrincipal]
+  void clearData(optional DOMString format);
+  [Throws, NeedsSubjectPrincipal]
+  readonly attribute FileList? files;
+};
+
+partial interface DataTransfer {
+  [Throws, Pref="dom.input.dirpicker", NeedsSubjectPrincipal]
+  Promise<sequence<(File or Directory)>> getFilesAndDirectories();
+
+  [Throws, Pref="dom.input.dirpicker", NeedsSubjectPrincipal]
+  Promise<sequence<File>>                getFiles(optional boolean recursiveFlag = false);
+};
+
+// Mozilla specific stuff
+partial interface DataTransfer {
+  /*
+   * Set the drag source. Usually you would not change this, but it will
+   * affect which node the drag and dragend events are fired at. The
+   * default target is the node that was dragged.
+   *
+   * @param element drag source to use
+   * @throws NO_MODIFICATION_ALLOWED_ERR if the item cannot be modified
+   */
+  [Throws]
+  void addElement(Element element);
+
+  /**
+   * The number of items being dragged.
+   */
+  readonly attribute unsigned long mozItemCount;
+
+  /**
+   * Sets the drag cursor state. Primarily used to control the cursor during
+   * tab drags, but could be expanded to other uses. XXX Currently implemented
+   * on Win32 only.
+   *
+   * Possible values:
+   *  auto - use default system behavior.
+   *  default - set the cursor to an arrow during the drag operation.
+   *
+   * Values other than 'default' are indentical to setting mozCursor to
+   * 'auto'.
+   */
+  attribute DOMString mozCursor;
+
+  /**
+   * Holds a list of the format types of the data that is stored for an item
+   * at the specified index. If the index is not in the range from 0 to
+   * itemCount - 1, an empty string list is returned.
+   */
+  [Throws]
+  DOMStringList mozTypesAt(unsigned long index);
+
+  /**
+   * Remove the data associated with the given format for an item at the
+   * specified index. The index is in the range from zero to itemCount - 1.
+   *
+   * If the last format for the item is removed, the entire item is removed,
+   * reducing the itemCount by one.
+   *
+   * If format is empty, then the data associated with all formats is removed.
+   * If the format is not found, then this method has no effect.
+   *
+   * @param format the format to remove
+   * @throws NS_ERROR_DOM_INDEX_SIZE_ERR if index is greater or equal than itemCount
+   * @throws NO_MODIFICATION_ALLOWED_ERR if the item cannot be modified
+   */
+  [Throws, NeedsSubjectPrincipal]
+  void mozClearDataAt(DOMString format, unsigned long index);
+
+  /*
+   * A data transfer may store multiple items, each at a given zero-based
+   * index. setDataAt may only be called with an index argument less than
+   * itemCount in which case an existing item is modified, or equal to
+   * itemCount in which case a new item is added, and the itemCount is
+   * incremented by one.
+   *
+   * Data should be added in order of preference, with the most specific
+   * format added first and the least specific format added last. If data of
+   * the given format already exists, it is replaced in the same position as
+   * the old data.
+   *
+   * The data should be either a string, a primitive boolean or number type
+   * (which will be converted into a string) or an nsISupports.
+   *
+   * @param format the format to add
+   * @param data the data to add
+   * @throws NS_ERROR_NULL_POINTER if the data is null
+   * @throws NS_ERROR_DOM_INDEX_SIZE_ERR if index is greater than itemCount
+   * @throws NO_MODIFICATION_ALLOWED_ERR if the item cannot be modified
+   */
+  [Throws, NeedsSubjectPrincipal]
+  void mozSetDataAt(DOMString format, any data, unsigned long index);
+
+  /**
+   * Retrieve the data associated with the given format for an item at the
+   * specified index, or null if it does not exist. The index should be in the
+   * range from zero to itemCount - 1.
+   *
+   * @param format the format of the data to look up
+   * @returns the data of the given format, or null if it doesn't exist.
+   * @throws NS_ERROR_DOM_INDEX_SIZE_ERR if index is greater or equal than itemCount
+   */
+  [Throws, NeedsSubjectPrincipal]
+  any mozGetDataAt(DOMString format, unsigned long index);
+
+  /**
+   * Will be true when the user has cancelled the drag (typically by pressing
+   * Escape) and when the drag has been cancelled unexpectedly.  This will be
+   * false otherwise, including when the drop has been rejected by its target.
+   * This property is only relevant for the dragend event.
+   */
+  readonly attribute boolean mozUserCancelled;
+
+  /**
+   * The node that the mouse was pressed over to begin the drag. For external
+   * drags, or if the caller cannot access this node, this will be null.
+   */
+  readonly attribute Node? mozSourceNode;
+};
diff --git a/dom/webidl/DataTransferItem.webidl b/dom/webidl/DataTransferItem.webidl
new file mode 100644
index 000000000..449498104
--- /dev/null
+++ b/dom/webidl/DataTransferItem.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * https://html.spec.whatwg.org/multipage/interaction.html#the-datatransferitem-interface
+ */
+
+interface DataTransferItem {
+  readonly attribute DOMString kind;
+  readonly attribute DOMString type;
+  [Throws, NeedsSubjectPrincipal]
+  void getAsString(FunctionStringCallback? _callback);
+  [Throws, NeedsSubjectPrincipal]
+  File? getAsFile();
+};
+
+callback FunctionStringCallback = void (DOMString data);
+
+partial interface DataTransferItem {
+  [Pref="dom.webkitBlink.filesystem.enabled", BinaryName="getAsEntry", Throws,
+   NeedsSubjectPrincipal]
+  FileSystemEntry? webkitGetAsEntry();
+};
diff --git a/dom/webidl/DataTransferItemList.webidl b/dom/webidl/DataTransferItemList.webidl
new file mode 100644
index 000000000..079afdd14
--- /dev/null
+++ b/dom/webidl/DataTransferItemList.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * https://html.spec.whatwg.org/multipage/interaction.html#the-datatransferitemlist-interface
+ */
+
+interface DataTransferItemList {
+  readonly attribute unsigned long length;
+  getter DataTransferItem (unsigned long index);
+  [Throws, NeedsSubjectPrincipal]
+  DataTransferItem? add(DOMString data, DOMString type);
+  [Throws, NeedsSubjectPrincipal]
+  DataTransferItem? add(File data);
+  [Throws, NeedsSubjectPrincipal]
+  void remove(unsigned long index);
+  [Throws, NeedsSubjectPrincipal]
+  void clear();
+};
diff --git a/dom/webidl/DecoderDoctorNotification.webidl b/dom/webidl/DecoderDoctorNotification.webidl
new file mode 100644
index 000000000..ef4ca8311
--- /dev/null
+++ b/dom/webidl/DecoderDoctorNotification.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+enum DecoderDoctorNotificationType {
+  "cannot-play",
+  "platform-decoder-not-found",
+  "can-play-but-some-missing-decoders",
+  "cannot-initialize-pulseaudio",
+  "unsupported-libavcodec",
+};
+
+dictionary DecoderDoctorNotification {
+  required DecoderDoctorNotificationType type;
+  // True when the issue has been solved.
+  required boolean isSolved;
+  // Key from dom.properties, used for telemetry and prefs.
+  required DOMString decoderDoctorReportId;
+  // If provided, formats (or key systems) at issue.
+  DOMString formats;
+};
diff --git a/dom/webidl/DedicatedWorkerGlobalScope.webidl b/dom/webidl/DedicatedWorkerGlobalScope.webidl
new file mode 100644
index 000000000..26dca58da
--- /dev/null
+++ b/dom/webidl/DedicatedWorkerGlobalScope.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#the-workerglobalscope-common-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Global=(Worker,DedicatedWorker),
+ Exposed=DedicatedWorker]
+interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
+  [Throws]
+  void postMessage(any message, optional sequence<any> transfer);
+
+  attribute EventHandler onmessage;
+};
diff --git a/dom/webidl/DelayNode.webidl b/dom/webidl/DelayNode.webidl
new file mode 100644
index 000000000..6a8fb5c3a
--- /dev/null
+++ b/dom/webidl/DelayNode.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface DelayNode : AudioNode {
+
+    readonly attribute AudioParam delayTime;
+
+};
+
+// Mozilla extension
+DelayNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/DesktopNotification.webidl b/dom/webidl/DesktopNotification.webidl
new file mode 100644
index 000000000..18bfce9dc
--- /dev/null
+++ b/dom/webidl/DesktopNotification.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MozObserver;
+
+[HeaderFile="mozilla/dom/DesktopNotification.h"]
+interface DesktopNotificationCenter
+{
+  [NewObject]
+  DesktopNotification createNotification(DOMString title,
+                                         DOMString description,
+                                         optional DOMString iconURL = "");
+};
+
+interface DesktopNotification : EventTarget
+{
+  [Throws]
+  void show();
+
+  attribute EventHandler onclick;
+
+  attribute EventHandler onclose;
+};
diff --git a/dom/webidl/DeviceLightEvent.webidl b/dom/webidl/DeviceLightEvent.webidl
new file mode 100644
index 000000000..453c67613
--- /dev/null
+++ b/dom/webidl/DeviceLightEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional DeviceLightEventInit eventInitDict)]
+interface DeviceLightEvent : Event
+{
+  readonly attribute unrestricted double value;
+};
+
+dictionary DeviceLightEventInit : EventInit
+{
+  unrestricted double value = Infinity;
+};
diff --git a/dom/webidl/DeviceMotionEvent.webidl b/dom/webidl/DeviceMotionEvent.webidl
new file mode 100644
index 000000000..c26ab080c
--- /dev/null
+++ b/dom/webidl/DeviceMotionEvent.webidl
@@ -0,0 +1,57 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[NoInterfaceObject]
+interface DeviceAcceleration {
+  readonly attribute double? x;
+  readonly attribute double? y;
+  readonly attribute double? z;
+};
+
+[NoInterfaceObject]
+interface DeviceRotationRate {
+  readonly attribute double? alpha;
+  readonly attribute double? beta;
+  readonly attribute double? gamma;
+};
+
+[Constructor(DOMString type, optional DeviceMotionEventInit eventInitDict)]
+interface DeviceMotionEvent : Event {
+  readonly attribute DeviceAcceleration? acceleration;
+  readonly attribute DeviceAcceleration? accelerationIncludingGravity;
+  readonly attribute DeviceRotationRate? rotationRate;
+  readonly attribute double? interval;
+};
+
+dictionary DeviceAccelerationInit {
+  double? x = null;
+  double? y = null;
+  double? z = null;
+};
+
+dictionary DeviceRotationRateInit {
+  double? alpha = null;
+  double? beta = null;
+  double? gamma = null;
+};
+
+dictionary DeviceMotionEventInit : EventInit {
+  DeviceAccelerationInit acceleration;
+  DeviceAccelerationInit accelerationIncludingGravity;
+  DeviceRotationRateInit rotationRate;
+  double? interval = null;
+};
+
+// Mozilla extensions.
+partial interface DeviceMotionEvent {
+  void initDeviceMotionEvent(DOMString type,
+                             optional boolean canBubble = false,
+                             optional boolean cancelable = false,
+                             optional DeviceAccelerationInit acceleration,
+                             optional DeviceAccelerationInit accelerationIncludingGravity,
+                             optional DeviceRotationRateInit rotationRate,
+                             optional double? interval = null);
+};
diff --git a/dom/webidl/DeviceOrientationEvent.webidl b/dom/webidl/DeviceOrientationEvent.webidl
new file mode 100644
index 000000000..9802b3681
--- /dev/null
+++ b/dom/webidl/DeviceOrientationEvent.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional DeviceOrientationEventInit eventInitDict), LegacyEventInit]
+interface DeviceOrientationEvent : Event
+{
+  readonly attribute double? alpha;
+  readonly attribute double? beta;
+  readonly attribute double? gamma;
+  readonly attribute boolean absolute;
+
+  // initDeviceOrientationEvent is a Gecko specific deprecated method.
+  void initDeviceOrientationEvent(DOMString type,
+                                  optional boolean canBubble = false,
+                                  optional boolean cancelable = false,
+                                  optional double? alpha = null,
+                                  optional double? beta = null,
+                                  optional double? gamma = null,
+                                  optional boolean absolute = false);
+};
+
+dictionary DeviceOrientationEventInit : EventInit
+{
+  double? alpha = null;
+  double? beta = null;
+  double? gamma = null;
+  boolean absolute = false;
+};
diff --git a/dom/webidl/DeviceProximityEvent.webidl b/dom/webidl/DeviceProximityEvent.webidl
new file mode 100644
index 000000000..0d3dc1275
--- /dev/null
+++ b/dom/webidl/DeviceProximityEvent.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional DeviceProximityEventInit eventInitDict)]
+interface DeviceProximityEvent : Event
+{
+  readonly attribute double value;
+  readonly attribute double min;
+  readonly attribute double max;
+};
+
+dictionary DeviceProximityEventInit : EventInit
+{
+  unrestricted double value = Infinity;
+  unrestricted double min = -Infinity;
+  unrestricted double max = Infinity;
+};
diff --git a/dom/webidl/Directory.webidl b/dom/webidl/Directory.webidl
new file mode 100644
index 000000000..942d50c7c
--- /dev/null
+++ b/dom/webidl/Directory.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * All functions on Directory that accept DOMString arguments for file or
+ * directory names only allow relative path to current directory itself. The
+ * path should be a descendent path like "path/to/file.txt" and not contain a
+ * segment of ".." or ".". So the paths aren't allowed to walk up the directory
+ * tree. For example, paths like "../foo", "..", "/foo/bar" or "foo/../bar" are
+ * not allowed.
+ *
+ * http://w3c.github.io/filesystem-api/#idl-def-Directory
+ * https://microsoftedge.github.io/directory-upload/proposal.html#directory-interface
+ */
+
+// This chromeConstructor is used by the MockFilePicker for testing only.
+[ChromeConstructor(DOMString path),
+ Exposed=(Window,Worker)]
+interface Directory {
+  /*
+   * The leaf name of the directory.
+   */
+  [Throws]
+  readonly attribute DOMString name;
+};
+
+[Exposed=(Window,Worker)]
+partial interface Directory {
+  // Already defined in the main interface declaration:
+  //readonly attribute DOMString name;
+
+  /*
+   * The path of the Directory (includes both its basename and leafname).
+   * The path begins with the name of the ancestor Directory that was
+   * originally exposed to content (say via a directory picker) and traversed
+   * to obtain this Directory.  Full filesystem paths are not exposed to
+   * unprivilaged content.
+   */
+  [Throws]
+  readonly attribute DOMString path;
+
+  /*
+   * Getter for the immediate children of this directory.
+   */
+  [Throws]
+  Promise<sequence<(File or Directory)>> getFilesAndDirectories();
+
+  [Throws]
+  Promise<sequence<File>> getFiles(optional boolean recursiveFlag = false);
+};
diff --git a/dom/webidl/Document.webidl b/dom/webidl/Document.webidl
new file mode 100644
index 000000000..2ade9a2c9
--- /dev/null
+++ b/dom/webidl/Document.webidl
@@ -0,0 +1,456 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * http://dxr.mozilla.org/mozilla-central/source/dom/interfaces/core/nsIDOMDocument.idl
+ */
+
+interface WindowProxy;
+interface nsISupports;
+interface URI;
+interface nsIDocShell;
+interface nsILoadGroup;
+
+enum VisibilityState { "hidden", "visible", "prerender" };
+
+/* https://dom.spec.whatwg.org/#dictdef-elementcreationoptions */
+dictionary ElementCreationOptions {
+  DOMString is;
+
+  [ChromeOnly]
+  DOMString pseudo;
+};
+
+/* http://dom.spec.whatwg.org/#interface-document */
+[Constructor]
+interface Document : Node {
+  [Throws]
+  readonly attribute DOMImplementation implementation;
+  [Pure, Throws]
+  readonly attribute DOMString URL;
+  [Pure, Throws]
+  readonly attribute DOMString documentURI;
+  [Pure]
+  readonly attribute DOMString compatMode;
+  [Pure]
+  readonly attribute DOMString characterSet;
+  [Pure,BinaryName="characterSet"]
+  readonly attribute DOMString charset; // legacy alias of .characterSet
+  [Pure,BinaryName="characterSet"]
+  readonly attribute DOMString inputEncoding; // legacy alias of .characterSet
+  [Pure]
+  readonly attribute DOMString contentType;
+
+  [Pure]
+  readonly attribute DocumentType? doctype;
+  [Pure]
+  readonly attribute Element? documentElement;
+  [Pure]
+  HTMLCollection getElementsByTagName(DOMString localName);
+  [Pure, Throws]
+  HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
+  [Pure]
+  HTMLCollection getElementsByClassName(DOMString classNames);
+  [Pure]
+  Element? getElementById(DOMString elementId);
+
+  [NewObject, Throws]
+  Element createElement(DOMString localName, optional (ElementCreationOptions or DOMString) options);
+  [NewObject, Throws]
+  Element createElementNS(DOMString? namespace, DOMString qualifiedName, optional (ElementCreationOptions or DOMString) options);
+  [NewObject]
+  DocumentFragment createDocumentFragment();
+  [NewObject]
+  Text createTextNode(DOMString data);
+  [NewObject]
+  Comment createComment(DOMString data);
+  [NewObject, Throws]
+  ProcessingInstruction createProcessingInstruction(DOMString target, DOMString data);
+
+  [CEReactions, Throws]
+  Node importNode(Node node, optional boolean deep = false);
+  [CEReactions, Throws]
+  Node adoptNode(Node node);
+
+  [NewObject, Throws]
+  Event createEvent(DOMString interface);
+
+  [NewObject, Throws]
+  Range createRange();
+
+  // NodeFilter.SHOW_ALL = 0xFFFFFFFF
+  [NewObject, Throws]
+  NodeIterator createNodeIterator(Node root, optional unsigned long whatToShow = 0xFFFFFFFF, optional NodeFilter? filter = null);
+  [NewObject, Throws]
+  TreeWalker createTreeWalker(Node root, optional unsigned long whatToShow = 0xFFFFFFFF, optional NodeFilter? filter = null);
+
+  // NEW
+  // No support for prepend/append yet
+  // void prepend((Node or DOMString)... nodes);
+  // void append((Node or DOMString)... nodes);
+
+  // These are not in the spec, but leave them for now for backwards compat.
+  // So sort of like Gecko extensions
+  [NewObject, Throws]
+  CDATASection createCDATASection(DOMString data);
+  [NewObject, Throws]
+  Attr createAttribute(DOMString name);
+  [NewObject, Throws]
+  Attr createAttributeNS(DOMString? namespace, DOMString name);
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-document-object
+partial interface Document {
+  [PutForwards=href, Unforgeable] readonly attribute Location? location;
+  //(HTML only)         attribute DOMString domain;
+  readonly attribute DOMString referrer;
+  //(HTML only)         attribute DOMString cookie;
+  readonly attribute DOMString lastModified;
+  readonly attribute DOMString readyState;
+
+  // DOM tree accessors
+  //(Not proxy yet)getter object (DOMString name);
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString title;
+  [CEReactions, Pure]
+           attribute DOMString dir;
+  //(HTML only)         attribute HTMLElement? body;
+  //(HTML only)readonly attribute HTMLHeadElement? head;
+  //(HTML only)readonly attribute HTMLCollection images;
+  //(HTML only)readonly attribute HTMLCollection embeds;
+  //(HTML only)readonly attribute HTMLCollection plugins;
+  //(HTML only)readonly attribute HTMLCollection links;
+  //(HTML only)readonly attribute HTMLCollection forms;
+  //(HTML only)readonly attribute HTMLCollection scripts;
+  //(HTML only)NodeList getElementsByName(DOMString elementName);
+  //(Not implemented)readonly attribute DOMElementMap cssElementMap;
+
+  // dynamic markup insertion
+  //(HTML only)Document open(optional DOMString type, optional DOMString replace);
+  //(HTML only)WindowProxy open(DOMString url, DOMString name, DOMString features, optional boolean replace);
+  //(HTML only)void close();
+  //(HTML only)void write(DOMString... text);
+  //(HTML only)void writeln(DOMString... text);
+
+  // user interaction
+  [Pure]
+  readonly attribute WindowProxy? defaultView;
+  [Throws]
+  boolean hasFocus();
+  //(HTML only)         attribute DOMString designMode;
+  //(HTML only)boolean execCommand(DOMString commandId);
+  //(HTML only)boolean execCommand(DOMString commandId, boolean showUI);
+  //(HTML only)boolean execCommand(DOMString commandId, boolean showUI, DOMString value);
+  //(HTML only)boolean queryCommandEnabled(DOMString commandId);
+  //(HTML only)boolean queryCommandIndeterm(DOMString commandId);
+  //(HTML only)boolean queryCommandState(DOMString commandId);
+  //(HTML only)boolean queryCommandSupported(DOMString commandId);
+  //(HTML only)DOMString queryCommandValue(DOMString commandId);
+  //(Not implemented)readonly attribute HTMLCollection commands;
+
+  // special event handler IDL attributes that only apply to Document objects
+  [LenientThis] attribute EventHandler onreadystatechange;
+
+  // Gecko extensions?
+                attribute EventHandler onwheel;
+                attribute EventHandler oncopy;
+                attribute EventHandler oncut;
+                attribute EventHandler onpaste;
+                attribute EventHandler onbeforescriptexecute;
+                attribute EventHandler onafterscriptexecute;
+
+                [Pref="dom.select_events.enabled"]
+                attribute EventHandler onselectionchange;
+
+  /**
+   * True if this document is synthetic : stand alone image, video, audio file,
+   * etc.
+   */
+  [Func="IsChromeOrXBL"] readonly attribute boolean mozSyntheticDocument;
+  /**
+   * Returns the script element whose script is currently being processed.
+   *
+   * @see <https://developer.mozilla.org/en/DOM/document.currentScript>
+   */
+  [Pure]
+  readonly attribute Element? currentScript;
+  /**
+   * Release the current mouse capture if it is on an element within this
+   * document.
+   *
+   * @see <https://developer.mozilla.org/en/DOM/document.releaseCapture>
+   */
+  void releaseCapture();
+  /**
+   * Use the given DOM element as the source image of target |-moz-element()|.
+   *
+   * This function introduces a new special ID (called "image element ID"),
+   * which is only used by |-moz-element()|, and associates it with the given
+   * DOM element.  Image elements ID's have the higher precedence than general
+   * HTML id's, so if |document.mozSetImageElement(<id>, <element>)| is called,
+   * |-moz-element(#<id>)| uses |<element>| as the source image even if there
+   * is another element with id attribute = |<id>|.  To unregister an image
+   * element ID |<id>|, call |document.mozSetImageElement(<id>, null)|.
+   *
+   * Example:
+   * <script>
+   *   canvas = document.createElement("canvas");
+   *   canvas.setAttribute("width", 100);
+   *   canvas.setAttribute("height", 100);
+   *   // draw to canvas
+   *   document.mozSetImageElement("canvasbg", canvas);
+   * </script>
+   * <div style="background-image: -moz-element(#canvasbg);"></div>
+   *
+   * @param aImageElementId an image element ID to associate with
+   * |aImageElement|
+   * @param aImageElement a DOM element to be used as the source image of
+   * |-moz-element(#aImageElementId)|. If this is null, the function will
+   * unregister the image element ID |aImageElementId|.
+   *
+   * @see <https://developer.mozilla.org/en/DOM/document.mozSetImageElement>
+   */
+  void mozSetImageElement(DOMString aImageElementId,
+                          Element? aImageElement);
+
+  [ChromeOnly]
+  readonly attribute URI? documentURIObject;
+
+  /**
+   * Current referrer policy - one of the REFERRER_POLICY_* constants
+   * from nsIHttpChannel.
+   */
+  [ChromeOnly]
+  readonly attribute unsigned long referrerPolicy;
+
+};
+
+// https://fullscreen.spec.whatwg.org/#api
+partial interface Document {
+  // Note: Per spec the 'S' in these two is lowercase, but the "Moz"
+  // versions have it uppercase.
+  [LenientSetter, Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  readonly attribute boolean fullscreen;
+  [BinaryName="fullscreen"]
+  readonly attribute boolean mozFullScreen;
+  [LenientSetter, Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  readonly attribute boolean fullscreenEnabled;
+  [BinaryName="fullscreenEnabled"]
+  readonly attribute boolean mozFullScreenEnabled;
+  [LenientSetter, Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  readonly attribute Element? fullscreenElement;
+  [BinaryName="fullscreenElement"]
+  readonly attribute Element? mozFullScreenElement;
+
+  [Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  void exitFullscreen();
+  [BinaryName="exitFullscreen"]
+  void mozCancelFullScreen();
+
+  // Events handlers
+  [Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  attribute EventHandler onfullscreenchange;
+  [Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  attribute EventHandler onfullscreenerror;
+};
+
+// https://w3c.github.io/pointerlock/#extensions-to-the-document-interface
+// https://w3c.github.io/pointerlock/#extensions-to-the-documentorshadowroot-mixin
+partial interface Document {
+  readonly attribute Element? pointerLockElement;
+  [BinaryName="pointerLockElement", Pref="pointer-lock-api.prefixed.enabled"]
+  readonly attribute Element? mozPointerLockElement;
+  void exitPointerLock();
+  [BinaryName="exitPointerLock", Pref="pointer-lock-api.prefixed.enabled"]
+  void mozExitPointerLock();
+
+  // Event handlers
+  attribute EventHandler onpointerlockchange;
+  attribute EventHandler onpointerlockerror;
+};
+
+// https://w3c.github.io/page-visibility/#extensions-to-the-document-interface
+partial interface Document {
+  [Pref="dom.visibilityAPI.enabled"]
+  readonly attribute boolean hidden;
+  [Pref="dom.visibilityAPI.enabled"]
+  readonly attribute VisibilityState visibilityState;
+  [Pref="dom.visibilityAPI.enabled"]
+           attribute EventHandler onvisibilitychange;
+};
+
+// http://dev.w3.org/csswg/cssom/#extensions-to-the-document-interface
+partial interface Document {
+    attribute DOMString? selectedStyleSheetSet;
+    readonly attribute DOMString? lastStyleSheetSet;
+    readonly attribute DOMString? preferredStyleSheetSet;
+    [Constant]
+    readonly attribute DOMStringList styleSheetSets;
+    void enableStyleSheetsForSet (DOMString? name);
+};
+
+// http://dev.w3.org/csswg/cssom-view/#extensions-to-the-document-interface
+partial interface Document {
+    Element? elementFromPoint (float x, float y);
+    sequence<Element> elementsFromPoint (float x, float y);
+    CaretPosition? caretPositionFromPoint (float x, float y);
+
+    readonly attribute Element? scrollingElement;
+};
+
+// http://dev.w3.org/2006/webapi/selectors-api2/#interface-definitions
+partial interface Document {
+  [Throws, Pure]
+  Element?  querySelector(DOMString selectors);
+  [Throws, Pure]
+  NodeList  querySelectorAll(DOMString selectors);
+
+  //(Not implemented)Element?  find(DOMString selectors, optional (Element or sequence<Node>)? refNodes);
+  //(Not implemented)NodeList  findAll(DOMString selectors, optional (Element or sequence<Node>)? refNodes);
+};
+
+// http://w3c.github.io/web-animations/#extensions-to-the-document-interface
+partial interface Document {
+  [Func="nsDocument::AreWebAnimationsTimelinesEnabled"]
+  readonly attribute DocumentTimeline timeline;
+  [Func="nsDocument::IsWebAnimationsGetAnimationsEnabled"]
+  sequence<Animation> getAnimations();
+};
+
+// https://svgwg.org/svg2-draft/struct.html#InterfaceDocumentExtensions
+partial interface Document {
+  [BinaryName="SVGRootElement"]
+  readonly attribute SVGSVGElement? rootElement;
+};
+
+//  Mozilla extensions of various sorts
+partial interface Document {
+  // nsIDOMDocumentXBL.  Wish we could make these [ChromeOnly], but
+  // that would likely break bindings running with the page principal.
+  [Func="IsChromeOrXBL"]
+  NodeList? getAnonymousNodes(Element elt);
+  [Func="IsChromeOrXBL"]
+  Element? getAnonymousElementByAttribute(Element elt, DOMString attrName,
+                                          DOMString attrValue);
+  [Func="IsChromeOrXBL"]
+  Element? getBindingParent(Node node);
+  [Throws, Func="IsChromeOrXBL", NeedsSubjectPrincipal]
+  void loadBindingDocument(DOMString documentURL);
+
+  // nsIDOMDocumentTouch
+  // XXXbz I can't find the sane spec for this stuff, so just cribbing
+  // from our xpidl for now.
+  [NewObject, Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  Touch createTouch(optional Window? view = null,
+                    optional EventTarget? target = null,
+                    optional long identifier = 0,
+                    optional long pageX = 0,
+                    optional long pageY = 0,
+                    optional long screenX = 0,
+                    optional long screenY = 0,
+                    optional long clientX = 0,
+                    optional long clientY = 0,
+                    optional long radiusX = 0,
+                    optional long radiusY = 0,
+                    optional float rotationAngle = 0,
+                    optional float force = 0);
+  // XXXbz a hack to get around the fact that we don't support variadics as
+  // distinguishing arguments yet.  Once this hack is removed. we can also
+  // remove the corresponding overload on nsIDocument, since Touch... and
+  // sequence<Touch> look the same in the C++.
+  [NewObject, Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  TouchList createTouchList(Touch touch, Touch... touches);
+  // XXXbz and another hack for the fact that we can't usefully have optional
+  // distinguishing arguments but need a working zero-arg form of
+  // createTouchList().
+  [NewObject, Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  TouchList createTouchList();
+  [NewObject, Func="nsGenericHTMLElement::TouchEventsEnabled"]
+  TouchList createTouchList(sequence<Touch> touches);
+
+  [ChromeOnly]
+  attribute boolean styleSheetChangeEventsEnabled;
+
+  [ChromeOnly, Throws]
+  void obsoleteSheet(URI sheetURI);
+  [ChromeOnly, Throws]
+  void obsoleteSheet(DOMString sheetURI);
+
+  [ChromeOnly] readonly attribute nsIDocShell? docShell;
+
+  [ChromeOnly] readonly attribute DOMString contentLanguage;
+
+  [ChromeOnly] readonly attribute nsILoadGroup? documentLoadGroup;
+
+  // like documentURI, except that for error pages, it returns the URI we were
+  // trying to load when we hit an error, rather than the error page's own URI.
+  [ChromeOnly] readonly attribute URI? mozDocumentURIIfNotForErrorPages;
+};
+
+// Extension to give chrome JS the ability to determine when a document was
+// created to satisfy an iframe with srcdoc attribute.
+partial interface Document {
+  [ChromeOnly] readonly attribute boolean isSrcdocDocument;
+};
+
+
+// Extension to give chrome JS the ability to get the underlying
+// sandbox flag attribute
+partial interface Document {
+  [ChromeOnly] readonly attribute DOMString? sandboxFlagsAsString;
+};
+
+
+/**
+ * Chrome document anonymous content management.
+ * This is a Chrome-only API that allows inserting fixed positioned anonymous
+ * content on top of the current page displayed in the document.
+ * The supplied content is cloned and inserted into the document's CanvasFrame.
+ * Note that this only works for HTML documents.
+ */
+partial interface Document {
+  /**
+   * Deep-clones the provided element and inserts it into the CanvasFrame.
+   * Returns an AnonymousContent instance that can be used to manipulate the
+   * inserted element.
+   */
+  [ChromeOnly, NewObject, Throws]
+  AnonymousContent insertAnonymousContent(Element aElement);
+
+  /**
+   * Removes the element inserted into the CanvasFrame given an AnonymousContent
+   * instance.
+   */
+  [ChromeOnly, Throws]
+  void removeAnonymousContent(AnonymousContent aContent);
+};
+
+// http://w3c.github.io/selection-api/#extensions-to-document-interface
+partial interface Document {
+  [Throws]
+  Selection? getSelection();
+};
+
+// Extension to give chrome JS the ability to determine whether
+// the user has interacted with the document or not.
+partial interface Document {
+  [ChromeOnly] readonly attribute boolean userHasInteracted;
+};
+
+// Extension to give chrome and XBL JS the ability to determine whether
+// the document is sandboxed without permission to run scripts
+// and whether inline scripts are blocked by the document's CSP.
+partial interface Document {
+  [Func="IsChromeOrXBL"] readonly attribute boolean hasScriptsBlockedBySandbox;
+  [Func="IsChromeOrXBL"] readonly attribute boolean inlineScriptAllowedByCSP;
+};
+
+Document implements XPathEvaluator;
+Document implements GlobalEventHandlers;
+Document implements TouchEventHandlers;
+Document implements ParentNode;
+Document implements OnErrorEventHandlerForNodes;
+Document implements GeometryUtils;
+Document implements FontFaceSource;
+Document implements DocumentOrShadowRoot;
diff --git a/dom/webidl/DocumentFragment.webidl b/dom/webidl/DocumentFragment.webidl
new file mode 100644
index 000000000..0f814666f
--- /dev/null
+++ b/dom/webidl/DocumentFragment.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120405/#interface-documentfragment
+ * http://www.w3.org/TR/2012/WD-selectors-api-20120628/#interface-definitions
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor]
+interface DocumentFragment : Node {
+  Element? getElementById(DOMString elementId);
+};
+
+// http://www.w3.org/TR/2012/WD-selectors-api-20120628/#interface-definitions
+partial interface DocumentFragment {
+  [Throws]
+  Element?  querySelector(DOMString selectors);
+  [Throws]
+  NodeList  querySelectorAll(DOMString selectors);
+};
+
+DocumentFragment implements ParentNode;
diff --git a/dom/webidl/DocumentOrShadowRoot.webidl b/dom/webidl/DocumentOrShadowRoot.webidl
new file mode 100644
index 000000000..16388d126
--- /dev/null
+++ b/dom/webidl/DocumentOrShadowRoot.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dom.spec.whatwg.org/#documentorshadowroot
+ * http://w3c.github.io/webcomponents/spec/shadow/#extensions-to-the-documentorshadowroot-mixin
+ */
+
+[NoInterfaceObject]
+interface DocumentOrShadowRoot {
+  // Not implemented yet: bug 1430308.
+  // Selection? getSelection();
+  // Not implemented yet: bug 1430301.
+  // Element? elementFromPoint (float x, float y);
+  // Not implemented yet: bug 1430301.
+  // sequence<Element> elementsFromPoint (float x, float y);
+  // Not implemented yet: bug 1430307.
+  // CaretPosition? caretPositionFromPoint (float x, float y);
+
+  readonly attribute Element? activeElement;
+  readonly attribute StyleSheetList styleSheets;
+
+  // Not implemented yet: bug 1430303.
+  // readonly attribute Element? pointerLockElement;
+  // Not implemented yet: bug 1430305.
+  // readonly attribute Element? fullscreenElement;
+};
diff --git a/dom/webidl/DocumentTimeline.webidl b/dom/webidl/DocumentTimeline.webidl
new file mode 100644
index 000000000..f10e2b365
--- /dev/null
+++ b/dom/webidl/DocumentTimeline.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#documenttimeline
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary DocumentTimelineOptions {
+  DOMHighResTimeStamp originTime = 0;
+};
+
+[Func="nsDocument::AreWebAnimationsTimelinesEnabled",
+ Constructor (optional DocumentTimelineOptions options)]
+interface DocumentTimeline : AnimationTimeline {
+};
diff --git a/dom/webidl/DocumentType.webidl b/dom/webidl/DocumentType.webidl
new file mode 100644
index 000000000..89190266f
--- /dev/null
+++ b/dom/webidl/DocumentType.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#documenttype
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface DocumentType : Node {
+  readonly attribute DOMString name;
+  readonly attribute DOMString publicId;
+  readonly attribute DOMString systemId;
+};
+
+DocumentType implements ChildNode;
diff --git a/dom/webidl/DominatorTree.webidl b/dom/webidl/DominatorTree.webidl
new file mode 100644
index 000000000..7eac4a8be
--- /dev/null
+++ b/dom/webidl/DominatorTree.webidl
@@ -0,0 +1,70 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+typedef unsigned long long NodeId;
+typedef unsigned long long NodeSize;
+
+/**
+ * In a directed graph with a root node `R`, a node `A` is said to "dominate" a
+ * node `B` iff every path from `R` to `B` contains `A`. A node `A` is said to
+ * be the "immediate dominator" of a node `B` iff it dominates `B`, is not `B`
+ * itself, and does not dominate any other nodes which also dominate `B` in
+ * turn.
+ *
+ * If we take every node from a graph `G` and create a new graph `T` with edges
+ * to each node from its immediate dominator, then `T` is a tree (each node has
+ * only one immediate dominator, or none if it is the root). This tree is called
+ * a "dominator tree".
+ *
+ * This interface represents a dominator tree constructed from a HeapSnapshot's
+ * heap graph. The domination relationship and dominator trees are useful tools
+ * for analyzing heap graphs because they tell you:
+ *
+ *   - Exactly what could be reclaimed by the GC if some node `A` became
+ *     unreachable: those nodes which are dominated by `A`,
+ *
+ *   - The "retained size" of a node in the heap graph, in contrast to its
+ *     "shallow size". The "shallow size" is the space taken by a node itself,
+ *     not counting anything it references. The "retained size" of a node is its
+ *     shallow size plus the size of all the things that would be collected if
+ *     the original node wasn't (directly or indirectly) referencing them. In
+ *     other words, the retained size is the shallow size of a node plus the
+ *     shallow sizes of every other node it dominates. For example, the root
+ *     node in a binary tree might have a small shallow size that does not take
+ *     up much space itself, but it dominates the rest of the binary tree and
+ *     its retained size is therefore significant (assuming no external
+ *     references into the tree).
+ */
+[ChromeOnly, Exposed=(Window,System,Worker)]
+interface DominatorTree {
+  /**
+   * The `NodeId` for the root of the dominator tree. This is a "meta-root" in
+   * that it has an edge to each GC root in the heap snapshot this dominator
+   * tree was created from.
+   */
+  readonly attribute NodeId root;
+
+  /**
+   * Get the retained size of the node with the given id. If given an invalid
+   * id, null is returned. Throws an error on OOM.
+   */
+  [Throws]
+  NodeSize? getRetainedSize(NodeId node);
+
+  /**
+   * Get the set of ids of nodes immediately dominated by the node with the
+   * given id. The resulting array is sorted by greatest to least retained
+   * size. If given an invalid id, null is returned. Throws an error on OOM.
+   */
+  [Throws]
+  sequence<NodeId>? getImmediatelyDominated(NodeId node);
+
+  /**
+   * Get the immediate dominator of the node with the given id. Returns null if
+   * given an invalid id, or the id of the root node.
+   */
+  NodeId? getImmediateDominator(NodeId node);
+};
diff --git a/dom/webidl/DownloadEvent.webidl b/dom/webidl/DownloadEvent.webidl
new file mode 100644
index 000000000..8422ba62b
--- /dev/null
+++ b/dom/webidl/DownloadEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional DownloadEventInit eventInitDict),
+ Pref="dom.mozDownloads.enabled",
+ ChromeOnly]
+interface DownloadEvent : Event
+{
+  readonly attribute DOMDownload? download;
+};
+
+dictionary DownloadEventInit : EventInit
+{
+  DOMDownload? download = null;
+};
diff --git a/dom/webidl/Downloads.webidl b/dom/webidl/Downloads.webidl
new file mode 100644
index 000000000..ff840eac6
--- /dev/null
+++ b/dom/webidl/Downloads.webidl
@@ -0,0 +1,166 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Represents the state of a download.
+// "downloading": The resource is actively transfering.
+// "stopped"    : No network tranfer is happening.
+// "succeeded"  : The resource has been downloaded successfully.
+// "finalized"  : We won't try to download this resource, but the DOM
+//                object is still alive.
+enum DownloadState {
+  "downloading",
+  "stopped",
+  "succeeded",
+  "finalized"
+};
+
+[NoInterfaceObject,
+ NavigatorProperty="mozDownloadManager",
+ JSImplementation="@mozilla.org/downloads/manager;1",
+ Pref="dom.mozDownloads.enabled",
+ ChromeOnly]
+interface DOMDownloadManager : EventTarget {
+  // This promise returns an array of downloads with all the current
+  // download objects.
+  Promise<sequence<DOMDownload>> getDownloads();
+
+  // Removes one download from the downloads set. Returns a promise resolved
+  // with the finalized download.
+  [UnsafeInPrerendering]
+  Promise<DOMDownload> remove(DOMDownload download);
+
+  // Removes all completed downloads.  This kicks off an asynchronous process
+  // that will eventually complete, but will not have completed by the time this
+  // method returns.  If you care about the side-effects of this method, know
+  // that each existing download will have its onstatechange method invoked and
+  // will have a new state of "finalized".  (After the download is finalized, no
+  // further events will be generated on it.)
+  [UnsafeInPrerendering]
+  void clearAllDone();
+
+  // Add completed downloads from applications that must perform the download
+  // process themselves. For example, email.  The method is resolved with a
+  // fully populated DOMDownload instance on success, or rejected in the
+  // event all required options were not provided.
+  //
+  // The adopted download will also be reported via the ondownloadstart event
+  // handler.
+  //
+  // Applications must currently be certified to use this, but it could be
+  // widened at a later time.
+  //
+  // Note that "download" is not actually optional, but WebIDL requires that it
+  // be marked as such because it is not followed by a required argument.  The
+  // promise will be rejected if the dictionary is omitted or the specified
+  // file does not exist on disk.
+  Promise<DOMDownload> adoptDownload(optional AdoptDownloadDict download);
+
+  // Fires when a new download starts.
+  attribute EventHandler ondownloadstart;
+};
+
+[JSImplementation="@mozilla.org/downloads/download;1",
+ Pref="dom.mozDownloads.enabled",
+ ChromeOnly]
+interface DOMDownload : EventTarget {
+  // The full size of the resource.
+  readonly attribute long long totalBytes;
+
+  // The number of bytes that we have currently downloaded.
+  readonly attribute long long currentBytes;
+
+  // The url of the resource.
+  readonly attribute DOMString url;
+
+  // The full path in local storage where the file will end up once the download
+  // is complete. This is equivalent to the concatenation of the 'storagePath'
+  // to the 'mountPoint' of the nsIVolume associated with the 'storageName'
+  // (with delimiter).
+  readonly attribute DOMString path;
+
+  // The DeviceStorage volume name on which the file is being downloaded.
+  readonly attribute DOMString storageName;
+
+  // The DeviceStorage path on the volume with 'storageName' of the file being
+  // downloaded.
+  readonly attribute DOMString storagePath;
+
+  // The state of the download.  One of: downloading, stopped, succeeded, or
+  // finalized.  A finalized download is a download that has been removed /
+  // cleared and is no longer tracked by the download manager and will not
+  // receive any further onstatechange updates.
+  readonly attribute DownloadState state;
+
+  // The mime type for this resource.
+  readonly attribute DOMString contentType;
+
+  // The timestamp this download started.
+  readonly attribute Date startTime;
+
+  // An opaque identifier for this download. All instances of the same
+  // download (eg. in different windows) will have the same id.
+  readonly attribute DOMString id;
+
+  // The manifestURL of the application that added this download. Only used for
+  // downloads added via the adoptDownload API call.
+  readonly attribute DOMString? sourceAppManifestURL;
+
+  // A DOM error object, that will be not null when a download is stopped
+  // because something failed.
+  readonly attribute DOMError? error;
+
+  // Pauses the download.
+  [UnsafeInPrerendering]
+  Promise<DOMDownload> pause();
+
+  // Resumes the download. This resolves only once the download has
+  // succeeded.
+  [UnsafeInPrerendering]
+  Promise<DOMDownload> resume();
+
+  // This event is triggered anytime a property of the object changes:
+  // - when the transfer progresses, updating currentBytes.
+  // - when the state and/or error attributes change.
+  attribute EventHandler onstatechange;
+};
+
+// Used to initialize the DOMDownload object for adopted downloads.
+// fields directly maps to the DOMDownload fields.
+dictionary AdoptDownloadDict {
+  // The URL of this resource if there is one available. An empty string if
+  // the download is not accessible via URL. An empty string is chosen over
+  // null so that existinc code does not need to null-check but the value is
+  // still falsey.  (Note: If you do have a usable URL, you should probably not
+  // be using the adoptDownload API and instead be initiating downloads the
+  // normal way.)
+  DOMString url;
+
+  // The storageName of the DeviceStorage instance the file was saved to.
+  // Required but marked as optional so the bindings don't auto-coerce the value
+  // null to "null".
+  DOMString? storageName;
+  // The path of the file within the DeviceStorage instance named by
+  // 'storageName'.  This is used to automatically compute the 'path' of the
+  // download.  Note that when DeviceStorage gives you a path to a file, the
+  // first path segment is the name of the specific device storage and you do
+  // *not* want to include this.  For example, if DeviceStorage tells you the
+  // file has a path of '/sdcard1/actual/path/file.ext', then the storageName
+  // should be 'sdcard1' and the storagePath should be 'actual/path/file.ext'.
+  //
+  // The existence of the file will be validated will be validated with stat()
+  // and the size the file-system tells us will be what we use.
+  //
+  // Required but marked as optional so the bindings don't auto-coerce the value
+  // null to "null".
+  DOMString? storagePath;
+
+  // The mime type for this resource.  Required, but marked as optional because
+  // WebIDL otherwise auto-coerces the value null to "null".
+  DOMString? contentType;
+
+  // The time the download was started. If omitted, the current time is used.
+  Date? startTime;
+};
diff --git a/dom/webidl/DragEvent.webidl b/dom/webidl/DragEvent.webidl
new file mode 100644
index 000000000..806177790
--- /dev/null
+++ b/dom/webidl/DragEvent.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional DragEventInit eventInitDict)]
+interface DragEvent : MouseEvent
+{
+  readonly attribute DataTransfer? dataTransfer;
+
+  void initDragEvent(DOMString type,
+                     optional boolean canBubble = false,
+                     optional boolean cancelable = false,
+                     optional Window? aView = null,
+                     optional long aDetail = 0,
+                     optional long aScreenX = 0,
+                     optional long aScreenY = 0,
+                     optional long aClientX = 0,
+                     optional long aClientY = 0,
+                     optional boolean aCtrlKey = false,
+                     optional boolean aAltKey = false,
+                     optional boolean aShiftKey = false,
+                     optional boolean aMetaKey = false,
+                     optional unsigned short aButton = 0,
+                     optional EventTarget? aRelatedTarget = null,
+                     optional DataTransfer? aDataTransfer = null);
+};
+
+dictionary DragEventInit : MouseEventInit
+{
+  DataTransfer? dataTransfer = null;
+};
diff --git a/dom/webidl/DynamicsCompressorNode.webidl b/dom/webidl/DynamicsCompressorNode.webidl
new file mode 100644
index 000000000..dc0e46f63
--- /dev/null
+++ b/dom/webidl/DynamicsCompressorNode.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface DynamicsCompressorNode : AudioNode {
+
+    readonly attribute AudioParam threshold; // in Decibels
+    readonly attribute AudioParam knee; // in Decibels
+    readonly attribute AudioParam ratio; // unit-less
+    readonly attribute float reduction; // in Decibels
+    readonly attribute AudioParam attack; // in Seconds
+    readonly attribute AudioParam release; // in Seconds
+
+};
+
+// Mozilla extension
+DynamicsCompressorNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Element.webidl b/dom/webidl/Element.webidl
new file mode 100644
index 000000000..d5cac7c64
--- /dev/null
+++ b/dom/webidl/Element.webidl
@@ -0,0 +1,273 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#element and
+ * http://domparsing.spec.whatwg.org/ and
+ * http://dev.w3.org/csswg/cssom-view/ and
+ * http://www.w3.org/TR/selectors-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface Element : Node {
+  [Constant]
+  readonly attribute DOMString? namespaceURI;
+  [Constant]
+  readonly attribute DOMString? prefix;
+  [Constant]
+  readonly attribute DOMString localName;
+
+  // Not [Constant] because it depends on which document we're in
+  [Pure]
+  readonly attribute DOMString tagName;
+
+  [CEReactions, Pure]
+           attribute DOMString id;
+  [CEReactions, Pure]
+           attribute DOMString className;
+  [Constant, PutForwards=value]
+  readonly attribute DOMTokenList classList;
+
+  [SameObject]
+  readonly attribute NamedNodeMap attributes;
+  [Pure]
+  sequence<DOMString> getAttributeNames();
+  [Pure]
+  DOMString? getAttribute(DOMString name);
+  [Pure]
+  DOMString? getAttributeNS(DOMString? namespace, DOMString localName);
+  [CEReactions, Throws]
+  boolean toggleAttribute(DOMString name, optional boolean force);
+  [CEReactions, Throws]
+  void setAttribute(DOMString name, DOMString value);
+  [CEReactions, Throws]
+  void setAttributeNS(DOMString? namespace, DOMString name, DOMString value);
+  [CEReactions, Throws]
+  void removeAttribute(DOMString name);
+  [CEReactions, Throws]
+  void removeAttributeNS(DOMString? namespace, DOMString localName);
+  [Pure]
+  boolean hasAttribute(DOMString name);
+  [Pure]
+  boolean hasAttributeNS(DOMString? namespace, DOMString localName);
+  [Pure]
+  boolean hasAttributes();
+
+  [Throws, Pure]
+  Element? closest(DOMString selector);
+
+  [Throws, Pure]
+  boolean matches(DOMString selector);
+  [Throws, Pure, BinaryName="matches"]
+  boolean webkitMatchesSelector(DOMString selector);
+
+  [Pure]
+  HTMLCollection getElementsByTagName(DOMString localName);
+  [Throws, Pure]
+  HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
+  [Pure]
+  HTMLCollection getElementsByClassName(DOMString classNames);
+
+  [CEReactions, Throws, Pure]
+  Element? insertAdjacentElement(DOMString where, Element element); // historical
+
+  [Throws]
+  void insertAdjacentText(DOMString where, DOMString data); // historical
+
+  /**
+   * The ratio of font-size-inflated text font size to computed font
+   * size for this element. This will query the element for its primary frame,
+   * and then use this to get font size inflation information about the frame.
+   * This will be 1.0 if font size inflation is not enabled, and -1.0 if an
+   * error occurred during the retrieval of the font size inflation.
+   *
+   * @note The font size inflation ratio that is returned is actually the
+   *       font size inflation data for the element's _primary frame_, not the
+   *       element itself, but for most purposes, this should be sufficient.
+   */
+  [ChromeOnly]
+  readonly attribute float fontSizeInflation;
+
+  // Mozilla specific stuff
+  [Pure]
+           attribute EventHandler onwheel;
+
+  // Selectors API
+  /**
+   * Returns whether this element would be selected by the given selector
+   * string.
+   *
+   * See <http://dev.w3.org/2006/webapi/selectors-api2/#matchesselector>
+   */
+  [Throws, Pure, BinaryName="matches"]
+  boolean mozMatchesSelector(DOMString selector);
+
+  // Pointer events methods.
+  [Throws, Pref="dom.w3c_pointer_events.enabled", UnsafeInPrerendering]
+  void setPointerCapture(long pointerId);
+
+  [Throws, Pref="dom.w3c_pointer_events.enabled"]
+  void releasePointerCapture(long pointerId);
+
+  [Pref="dom.w3c_pointer_events.enabled"]
+  boolean hasPointerCapture(long pointerId);
+
+  // Proprietary extensions
+  /**
+   * Set this during a mousedown event to grab and retarget all mouse events
+   * to this element until the mouse button is released or releaseCapture is
+   * called. If retargetToElement is true, then all events are targetted at
+   * this element. If false, events can also fire at descendants of this
+   * element.
+   * 
+   */
+  void setCapture(optional boolean retargetToElement = false);
+
+  /**
+   * If this element has captured the mouse, release the capture. If another
+   * element has captured the mouse, this method has no effect.
+   */
+  void releaseCapture();
+
+  // Mozilla extensions
+
+  // Obsolete methods.
+  Attr? getAttributeNode(DOMString name);
+  [CEReactions, Throws]
+  Attr? setAttributeNode(Attr newAttr);
+  [CEReactions, Throws]
+  Attr? removeAttributeNode(Attr oldAttr);
+  Attr? getAttributeNodeNS(DOMString? namespaceURI, DOMString localName);
+  [CEReactions, Throws]
+  Attr? setAttributeNodeNS(Attr newAttr);
+
+  [ChromeOnly]
+  /**
+   * Scrolls the element by (dx, dy) CSS pixels without doing any
+   * layout flushing.
+   */
+  boolean scrollByNoFlush(long dx, long dy);
+
+  // Support reporting of Grid properties
+
+  /**
+   * If this element has a display:grid or display:inline-grid style,
+   * this property returns an object with computed values for grid
+   * tracks and lines.
+   */
+  [ChromeOnly, Pure]
+  sequence<Grid> getGridFragments();
+};
+
+// http://dev.w3.org/csswg/cssom-view/
+enum ScrollLogicalPosition { "start", "center", "end", "nearest" };
+dictionary ScrollIntoViewOptions : ScrollOptions {
+  ScrollLogicalPosition block = "start";
+  ScrollLogicalPosition inline = "nearest";
+};
+
+// http://dev.w3.org/csswg/cssom-view/#extensions-to-the-element-interface
+partial interface Element {
+  DOMRectList getClientRects();
+  DOMRect getBoundingClientRect();
+
+  // scrolling
+  void scrollIntoView(optional (boolean or ScrollIntoViewOptions) arg);
+  // None of the CSSOM attributes are [Pure], because they flush
+           attribute long scrollTop;   // scroll on setting
+           attribute long scrollLeft;  // scroll on setting
+  readonly attribute long scrollWidth;
+  readonly attribute long scrollHeight;
+  
+  void scroll(unrestricted double x, unrestricted double y);
+  void scroll(optional ScrollToOptions options);
+  void scrollTo(unrestricted double x, unrestricted double y);
+  void scrollTo(optional ScrollToOptions options);
+  void scrollBy(unrestricted double x, unrestricted double y);
+  void scrollBy(optional ScrollToOptions options);
+  // mozScrollSnap is used by chrome to perform scroll snapping after the
+  // user performs actions that may affect scroll position
+  // mozScrollSnap is deprecated, to be replaced by a web accessible API, such
+  // as an extension to the ScrollOptions dictionary.  See bug 1137937.
+  [ChromeOnly] void mozScrollSnap();
+
+  readonly attribute long clientTop;
+  readonly attribute long clientLeft;
+  readonly attribute long clientWidth;
+  readonly attribute long clientHeight;
+
+  // Mozilla specific stuff
+  /* The minimum/maximum offset that the element can be scrolled to
+     (i.e., the value that scrollLeft/scrollTop would be clamped to if they were
+     set to arbitrarily large values. */
+  [ChromeOnly] readonly attribute long scrollTopMin;
+               readonly attribute long scrollTopMax;
+  [ChromeOnly] readonly attribute long scrollLeftMin;
+               readonly attribute long scrollLeftMax;
+};
+
+// http://domparsing.spec.whatwg.org/#extensions-to-the-element-interface
+partial interface Element {
+  [CEReactions, Pure,SetterThrows,TreatNullAs=EmptyString]
+  attribute DOMString innerHTML;
+  [CEReactions, Pure,SetterThrows,TreatNullAs=EmptyString]
+  attribute DOMString outerHTML;
+  [CEReactions, Throws]
+  void insertAdjacentHTML(DOMString position, DOMString text);
+};
+
+// http://www.w3.org/TR/selectors-api/#interface-definitions
+partial interface Element {
+  [Throws, Pure]
+  Element?  querySelector(DOMString selectors);
+  [Throws, Pure]
+  NodeList  querySelectorAll(DOMString selectors);
+};
+
+// https://dom.spec.whatwg.org/#dictdef-shadowrootinit
+dictionary ShadowRootInit {
+  required ShadowRootMode mode;
+};
+
+// https://dom.spec.whatwg.org/#element
+partial interface Element {
+  // Shadow DOM v1
+  [Throws, Func="nsDocument::IsWebComponentsEnabled"]
+  ShadowRoot attachShadow(ShadowRootInit shadowRootInitDict);
+  [BinaryName="shadowRootByMode", Func="nsDocument::IsWebComponentsEnabled"]
+  readonly attribute ShadowRoot? shadowRoot;
+  [BinaryName="assignedSlotByMode", Func="nsDocument::IsWebComponentsEnabled"]
+  readonly attribute HTMLSlotElement? assignedSlot;
+  [CEReactions, Unscopable, SetterThrows, Func="nsDocument::IsWebComponentsEnabled"]
+           attribute DOMString slot;
+
+  // [deprecated] Shadow DOM v0
+  [Throws, Func="nsDocument::IsWebComponentsEnabled"]
+  ShadowRoot createShadowRoot();
+};
+
+Element implements ChildNode;
+Element implements NonDocumentTypeChildNode;
+Element implements ParentNode;
+Element implements Animatable;
+Element implements GeometryUtils;
+
+// https://fullscreen.spec.whatwg.org/#api
+partial interface Element {
+  [Throws, UnsafeInPrerendering, Func="nsDocument::IsUnprefixedFullscreenEnabled"]
+  void requestFullscreen();
+  [Throws, UnsafeInPrerendering, BinaryName="requestFullscreen"]
+  void mozRequestFullScreen();
+};
+
+// https://w3c.github.io/pointerlock/#extensions-to-the-element-interface
+partial interface Element {
+  [UnsafeInPrerendering]
+  void requestPointerLock();
+  [UnsafeInPrerendering, BinaryName="requestPointerLock", Pref="pointer-lock-api.prefixed.enabled"]
+  void mozRequestPointerLock();
+};
diff --git a/dom/webidl/ErrorEvent.webidl b/dom/webidl/ErrorEvent.webidl
new file mode 100644
index 000000000..5d12b879f
--- /dev/null
+++ b/dom/webidl/ErrorEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Constructor(DOMString type, optional ErrorEventInit eventInitDict),
+ Exposed=(Window,System)]
+interface ErrorEvent : Event
+{
+  readonly attribute DOMString message;
+  readonly attribute DOMString filename;
+  readonly attribute unsigned long lineno;
+  readonly attribute unsigned long colno;
+  readonly attribute any error;
+};
+
+dictionary ErrorEventInit : EventInit
+{
+  DOMString message = "";
+  DOMString filename = "";
+  unsigned long lineno = 0;
+  unsigned long colno = 0;
+  any error = null;
+};
diff --git a/dom/webidl/Event.webidl b/dom/webidl/Event.webidl
new file mode 100644
index 000000000..8a8e71c43
--- /dev/null
+++ b/dom/webidl/Event.webidl
@@ -0,0 +1,81 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional EventInit eventInitDict),
+ Exposed=(Window,Worker,System), ProbablyShortLivingObject]
+interface Event {
+  [Pure]
+  readonly attribute DOMString type;
+  [Pure]
+  readonly attribute EventTarget? target;
+  [Pure, BinaryName="target"]
+  readonly attribute EventTarget? srcElement;
+  [Pure]
+  readonly attribute EventTarget? currentTarget;
+
+  sequence<EventTarget> composedPath();
+
+  const unsigned short NONE = 0;
+  const unsigned short CAPTURING_PHASE = 1;
+  const unsigned short AT_TARGET = 2;
+  const unsigned short BUBBLING_PHASE = 3;
+  [Pure]
+  readonly attribute unsigned short eventPhase;
+
+  void stopPropagation();
+  void stopImmediatePropagation();
+
+  [Pure]
+  readonly attribute boolean bubbles;
+  [Pure]
+  readonly attribute boolean cancelable;
+  void preventDefault();
+  [Pure]
+  readonly attribute boolean defaultPrevented;
+  [ChromeOnly, Pure]
+  readonly attribute boolean defaultPreventedByChrome;
+  [ChromeOnly, Pure]
+  readonly attribute boolean defaultPreventedByContent;
+  [Pure]
+  readonly attribute boolean composed;
+
+  [Unforgeable, Pure]
+  readonly attribute boolean isTrusted;
+  [Pure]
+  readonly attribute DOMHighResTimeStamp timeStamp;
+
+  void initEvent(DOMString type,
+                 optional boolean bubbles = false,
+                 optional boolean cancelable = false);
+  attribute boolean cancelBubble;
+};
+
+// Mozilla specific legacy stuff.
+partial interface Event {
+  const long ALT_MASK     = 0x00000001;
+  const long CONTROL_MASK = 0x00000002;
+  const long SHIFT_MASK   = 0x00000004;
+  const long META_MASK    = 0x00000008;
+
+  readonly attribute EventTarget? originalTarget;
+  readonly attribute EventTarget? explicitOriginalTarget;
+  [ChromeOnly] readonly attribute EventTarget? composedTarget;
+  [ChromeOnly] readonly attribute boolean multipleActionsPrevented;
+  [ChromeOnly] readonly attribute boolean isSynthesized;
+  boolean getPreventDefault();
+};
+
+dictionary EventInit {
+  boolean bubbles = false;
+  boolean cancelable = false;
+  boolean composed = false;
+};
diff --git a/dom/webidl/EventHandler.webidl b/dom/webidl/EventHandler.webidl
new file mode 100644
index 000000000..f7acb66ef
--- /dev/null
+++ b/dom/webidl/EventHandler.webidl
@@ -0,0 +1,180 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#eventhandler
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+[TreatNonObjectAsNull]
+callback EventHandlerNonNull = any (Event event);
+typedef EventHandlerNonNull? EventHandler;
+
+[TreatNonObjectAsNull]
+// https://www.w3.org/Bugs/Public/show_bug.cgi?id=23489
+//callback OnBeforeUnloadEventHandlerNonNull = DOMString (Event event);
+callback OnBeforeUnloadEventHandlerNonNull = DOMString? (Event event);
+typedef OnBeforeUnloadEventHandlerNonNull? OnBeforeUnloadEventHandler;
+
+[TreatNonObjectAsNull]
+callback OnErrorEventHandlerNonNull = boolean ((Event or DOMString) event, optional DOMString source, optional unsigned long lineno, optional unsigned long column, optional any error);
+typedef OnErrorEventHandlerNonNull? OnErrorEventHandler;
+
+[NoInterfaceObject]
+interface GlobalEventHandlers {
+           attribute EventHandler onabort;
+           attribute EventHandler onblur;
+// We think the spec is wrong here. See OnErrorEventHandlerForNodes/Window
+// below.
+//         attribute OnErrorEventHandler onerror;
+           attribute EventHandler onfocus;
+           //(Not implemented)attribute EventHandler oncancel;
+           attribute EventHandler onauxclick;
+           attribute EventHandler oncanplay;
+           attribute EventHandler oncanplaythrough;
+           attribute EventHandler onchange;
+           attribute EventHandler onclick;
+           attribute EventHandler onclose;
+           attribute EventHandler oncontextmenu;
+           //(Not implemented)attribute EventHandler oncuechange;
+           attribute EventHandler ondblclick;
+           attribute EventHandler ondrag;
+           attribute EventHandler ondragend;
+           attribute EventHandler ondragenter;
+           attribute EventHandler ondragexit;
+           attribute EventHandler ondragleave;
+           attribute EventHandler ondragover;
+           attribute EventHandler ondragstart;
+           attribute EventHandler ondrop;
+           attribute EventHandler ondurationchange;
+           attribute EventHandler onemptied;
+           attribute EventHandler onended;
+           attribute EventHandler oninput;
+           attribute EventHandler oninvalid;
+           attribute EventHandler onkeydown;
+           attribute EventHandler onkeypress;
+           attribute EventHandler onkeyup;
+           attribute EventHandler onload;
+           attribute EventHandler onloadeddata;
+           attribute EventHandler onloadedmetadata;
+           attribute EventHandler onloadend;
+           attribute EventHandler onloadstart;
+           attribute EventHandler onmousedown;
+  [LenientThis] attribute EventHandler onmouseenter;
+  [LenientThis] attribute EventHandler onmouseleave;
+           attribute EventHandler onmousemove;
+           attribute EventHandler onmouseout;
+           attribute EventHandler onmouseover;
+           attribute EventHandler onmouseup;
+           //(Not implemented)attribute EventHandler onmousewheel;
+           attribute EventHandler onpause;
+           attribute EventHandler onplay;
+           attribute EventHandler onplaying;
+           attribute EventHandler onprogress;
+           attribute EventHandler onratechange;
+           attribute EventHandler onreset;
+           attribute EventHandler onresize;
+           attribute EventHandler onscroll;
+           attribute EventHandler onseeked;
+           attribute EventHandler onseeking;
+           attribute EventHandler onselect;
+           [Pref="dom.menuitem.enabled"]
+           attribute EventHandler onshow;
+           //(Not implemented)attribute EventHandler onsort;
+           attribute EventHandler onstalled;
+           attribute EventHandler onsubmit;
+           attribute EventHandler onsuspend;
+           attribute EventHandler ontimeupdate;
+           attribute EventHandler onvolumechange;
+           attribute EventHandler onwaiting;
+
+           [Pref="dom.select_events.enabled"]
+           attribute EventHandler onselectstart;
+
+           [Pref="dom.details_element.enabled"]
+           attribute EventHandler ontoggle;
+
+           // Pointer events handlers
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointercancel;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerdown;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerup;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointermove;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerout;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerover;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerenter;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onpointerleave;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler ongotpointercapture;
+           [Pref="dom.w3c_pointer_events.enabled"]
+           attribute EventHandler onlostpointercapture;
+
+           // Mozilla-specific handlers. Unprefixed handlers live in
+           // Document rather than here.
+           attribute EventHandler onmozfullscreenchange;
+           attribute EventHandler onmozfullscreenerror;
+           [Pref="pointer-lock-api.prefixed.enabled"]
+           attribute EventHandler onmozpointerlockchange;
+           [Pref="pointer-lock-api.prefixed.enabled"]
+           attribute EventHandler onmozpointerlockerror;
+
+           // CSS-Animation and CSS-Transition handlers.
+           attribute EventHandler onanimationcancel;
+           attribute EventHandler onanimationend;
+           attribute EventHandler onanimationiteration;
+           attribute EventHandler onanimationstart;
+           attribute EventHandler ontransitioncancel;
+           attribute EventHandler ontransitionend;
+           attribute EventHandler ontransitionrun;
+           attribute EventHandler ontransitionstart;
+
+           // CSS-Animation and CSS-Transition legacy handlers.
+           // This handler isn't standard.
+           attribute EventHandler onwebkitanimationend;
+           attribute EventHandler onwebkitanimationiteration;
+           attribute EventHandler onwebkitanimationstart;
+           attribute EventHandler onwebkittransitionend;
+};
+
+[NoInterfaceObject]
+interface WindowEventHandlers {
+           attribute EventHandler onafterprint;
+           attribute EventHandler onbeforeprint;
+           attribute OnBeforeUnloadEventHandler onbeforeunload;
+           attribute EventHandler onhashchange;
+           attribute EventHandler onlanguagechange;
+           attribute EventHandler onmessage;
+           attribute EventHandler onoffline;
+           attribute EventHandler ononline;
+           attribute EventHandler onpagehide;
+           attribute EventHandler onpageshow;
+           attribute EventHandler onpopstate;
+           attribute EventHandler onstorage;
+           attribute EventHandler onunload;
+};
+
+// The spec has |attribute OnErrorEventHandler onerror;| on
+// GlobalEventHandlers, and calls the handler differently depending on
+// whether an ErrorEvent was fired. We don't do that, and until we do we'll
+// need to distinguish between onerror on Window or on nodes.
+
+[NoInterfaceObject]
+interface OnErrorEventHandlerForNodes {
+           attribute EventHandler onerror;
+};
+
+[NoInterfaceObject]
+interface OnErrorEventHandlerForWindow {
+           attribute OnErrorEventHandler onerror;
+};
diff --git a/dom/webidl/EventListener.webidl b/dom/webidl/EventListener.webidl
new file mode 100644
index 000000000..46aa748d6
--- /dev/null
+++ b/dom/webidl/EventListener.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+callback interface EventListener {
+  void handleEvent(Event event);
+};
diff --git a/dom/webidl/EventSource.webidl b/dom/webidl/EventSource.webidl
new file mode 100644
index 000000000..1e8e9978e
--- /dev/null
+++ b/dom/webidl/EventSource.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/comms.html#the-eventsource-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[Constructor(USVString url, optional EventSourceInit eventSourceInitDict)]
+interface EventSource : EventTarget {
+  [Constant]
+  readonly attribute DOMString url;
+  [Constant]
+  readonly attribute boolean withCredentials;
+
+  // ready state
+  const unsigned short CONNECTING = 0;
+  const unsigned short OPEN = 1;
+  const unsigned short CLOSED = 2;
+  readonly attribute unsigned short readyState;
+
+  // networking
+  attribute EventHandler onopen;
+  attribute EventHandler onmessage;
+  attribute EventHandler onerror;
+  void close();
+};
+
+dictionary EventSourceInit {
+  boolean withCredentials = false;
+};
diff --git a/dom/webidl/EventTarget.webidl b/dom/webidl/EventTarget.webidl
new file mode 100644
index 000000000..123fac478
--- /dev/null
+++ b/dom/webidl/EventTarget.webidl
@@ -0,0 +1,68 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+
+dictionary EventListenerOptions {
+  boolean capture = false;
+  /* Setting to true make the listener be added to the system group. */
+  [Func="ThreadSafeIsChromeOrXBL"]
+  boolean mozSystemGroup = false;
+};
+
+dictionary AddEventListenerOptions : EventListenerOptions {
+  boolean passive = false;
+  boolean once = false;
+};
+
+[Constructor,
+ Exposed=(Window,Worker,WorkerDebugger,System)]
+interface EventTarget {
+  /* Passing null for wantsUntrusted means "default behavior", which
+     differs in content and chrome.  In content that default boolean
+     value is true, while in chrome the default boolean value is
+     false. */
+  [Throws]
+  void addEventListener(DOMString type,
+                        EventListener? listener,
+                        optional (AddEventListenerOptions or boolean) options,
+                        optional boolean? wantsUntrusted = null);
+  [Throws]
+  void removeEventListener(DOMString type,
+                           EventListener? listener,
+                           optional (EventListenerOptions or boolean) options);
+  [Throws]
+  boolean dispatchEvent(Event event);
+};
+
+// Mozilla extensions for use by JS-implemented event targets to
+// implement on* properties.
+partial interface EventTarget {
+  // The use of [TreatNonCallableAsNull] here is a bit of a hack: it just makes
+  // the codegen check whether the type involved is either
+  // [TreatNonCallableAsNull] or [TreatNonObjectAsNull] and if it is handle it
+  // accordingly.  In particular, it will NOT actually treat a non-null
+  // non-callable object as null here.
+  [ChromeOnly, Throws]
+  void setEventHandler(DOMString type,
+                       [TreatNonCallableAsNull] EventHandler handler);
+
+  [ChromeOnly]
+  EventHandler getEventHandler(DOMString type);
+};
+
+// Mozilla extension to make firing events on event targets from
+// chrome easier.  This returns the window which can be used to create
+// events to fire at this EventTarget, or null if there isn't one.
+partial interface EventTarget {
+  [ChromeOnly, Exposed=(Window,System), BinaryName="ownerGlobalForBindings"]
+  readonly attribute WindowProxy? ownerGlobal;
+};
diff --git a/dom/webidl/ExtendableEvent.webidl b/dom/webidl/ExtendableEvent.webidl
new file mode 100644
index 000000000..01dc545ef
--- /dev/null
+++ b/dom/webidl/ExtendableEvent.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ */
+
+[Constructor(DOMString type, optional ExtendableEventInit eventInitDict),
+ Exposed=ServiceWorker]
+interface ExtendableEvent : Event {
+  // https://github.com/slightlyoff/ServiceWorker/issues/261
+  [Throws]
+  void waitUntil(Promise<any> p);
+};
+
+dictionary ExtendableEventInit : EventInit {
+  // Defined for the forward compatibility across the derived events
+};
diff --git a/dom/webidl/ExtendableMessageEvent.webidl b/dom/webidl/ExtendableMessageEvent.webidl
new file mode 100644
index 000000000..b2bdf6792
--- /dev/null
+++ b/dom/webidl/ExtendableMessageEvent.webidl
@@ -0,0 +1,44 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * https://w3c.github.io/ServiceWorker/#extendablemessage-event-section
+ */
+
+[Constructor(DOMString type, optional ExtendableMessageEventInit eventInitDict),
+ Exposed=(ServiceWorker)]
+interface ExtendableMessageEvent : ExtendableEvent {
+  /**
+   * Custom data associated with this event.
+   */
+  [GetterThrows]
+  readonly attribute any data;
+
+  /**
+   * The origin of the site from which this event originated.
+   */
+  readonly attribute DOMString origin;
+
+  /**
+   * The last event ID string of the event source.
+   */
+  readonly attribute DOMString lastEventId;
+
+  /**
+   * The client, service worker or port which originated this event.
+   */
+  readonly attribute (Client or ServiceWorker or MessagePort)? source;
+
+  [Constant, Cached, Frozen]
+  readonly attribute sequence<MessagePort> ports;
+};
+
+dictionary ExtendableMessageEventInit : ExtendableEventInit {
+  any data = null;
+  DOMString origin = "";
+  DOMString lastEventId = "";
+  (Client or ServiceWorker or MessagePort)? source = null;
+  sequence<MessagePort> ports = [];
+};
diff --git a/dom/webidl/External.webidl b/dom/webidl/External.webidl
new file mode 100644
index 000000000..890dff306
--- /dev/null
+++ b/dom/webidl/External.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[JSImplementation="@mozilla.org/sidebar;1"]
+interface External
+{
+  [UnsafeInPrerendering] void AddSearchProvider(DOMString aDescriptionURL);
+  unsigned long IsSearchProviderInstalled(DOMString aSearchURL);
+};
+
+// Mozilla extension
+partial interface External {
+  [UnsafeInPrerendering, UseCounter]
+  void addSearchEngine(DOMString engineURL, DOMString iconURL,
+                       DOMString suggestedTitle, DOMString suggestedCategory);
+};
diff --git a/dom/webidl/FakePluginTagInit.webidl b/dom/webidl/FakePluginTagInit.webidl
new file mode 100644
index 000000000..93cbad7f8
--- /dev/null
+++ b/dom/webidl/FakePluginTagInit.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * A fake plugin is fundamentally identified by its handlerURI.
+ *
+ * In addition to that, a fake plugin registration needs to provide at least one
+ * FakePluginMimeEntry so we'll know what types(s) the plugin is registered for.
+ * Other information is optional, though having usable niceName is highly
+ * recommended.
+ */
+dictionary FakePluginTagInit {
+  required DOMString handlerURI;
+  required sequence<FakePluginMimeEntry> mimeEntries;
+
+  // The niceName should really be provided, and be unique, if possible; it can
+  // be used as a key to persist state for this plug-in.
+  DOMString niceName = "";
+
+  // Other things can be provided but don't really matter that much.
+  DOMString fullPath = "";
+  DOMString name = "";
+  DOMString description = "";
+  DOMString fileName = "";
+  DOMString version = "";
+};
+
+/**
+ * A single MIME entry for the fake plugin.
+ */
+dictionary FakePluginMimeEntry {
+  required DOMString type;
+  DOMString description = "";
+  DOMString extension = "";
+};
+
diff --git a/dom/webidl/Fetch.webidl b/dom/webidl/Fetch.webidl
new file mode 100644
index 000000000..4b2a0af7d
--- /dev/null
+++ b/dom/webidl/Fetch.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://fetch.spec.whatwg.org/
+ */
+
+typedef object JSON;
+typedef (ArrayBuffer or ArrayBufferView or Blob or FormData or USVString or URLSearchParams) BodyInit;
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface Body {
+  readonly attribute boolean bodyUsed;
+  [Throws]
+  Promise<ArrayBuffer> arrayBuffer();
+  [Throws]
+  Promise<Blob> blob();
+  [Throws]
+  Promise<FormData> formData();
+  [Throws]
+  Promise<JSON> json();
+  [Throws]
+  Promise<USVString> text();
+};
diff --git a/dom/webidl/FetchEvent.webidl b/dom/webidl/FetchEvent.webidl
new file mode 100644
index 000000000..3967c122e
--- /dev/null
+++ b/dom/webidl/FetchEvent.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ */
+
+[Constructor(DOMString type, FetchEventInit eventInitDict),
+ Func="mozilla::dom::workers::ServiceWorkerVisible",
+ Exposed=(ServiceWorker)]
+interface FetchEvent : ExtendableEvent {
+  [SameObject] readonly attribute Request request;
+  readonly attribute DOMString? clientId;
+  readonly attribute boolean isReload;
+
+  [Throws]
+  void respondWith(Promise<Response> r);
+};
+
+dictionary FetchEventInit : EventInit {
+  required Request request;
+  DOMString? clientId = null;
+  boolean isReload = false;
+};
diff --git a/dom/webidl/FetchObserver.webidl b/dom/webidl/FetchObserver.webidl
new file mode 100644
index 000000000..eecd67e66
--- /dev/null
+++ b/dom/webidl/FetchObserver.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+callback interface ObserverCallback {
+  void handleEvent(FetchObserver observer);
+};
+
+enum FetchState {
+  // Pending states
+  "requesting", "responding",
+  // Final states
+  "aborted", "errored", "complete"
+};
+
+[Exposed=(Window,Worker),
+ Func="FetchObserver::IsEnabled"]
+interface FetchObserver : EventTarget {
+  readonly attribute FetchState state;
+
+  // Events
+  attribute EventHandler onstatechange;
+  attribute EventHandler onrequestprogress;
+  attribute EventHandler onresponseprogress;
+};
diff --git a/dom/webidl/File.webidl b/dom/webidl/File.webidl
new file mode 100644
index 000000000..cd3241c52
--- /dev/null
+++ b/dom/webidl/File.webidl
@@ -0,0 +1,50 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/FileAPI/#file
+ */
+
+interface nsIFile;
+
+[Constructor(sequence<BlobPart> fileBits,
+             USVString fileName, optional FilePropertyBag options),
+ Exposed=(Window,Worker)]
+interface File : Blob {
+  readonly attribute DOMString name;
+
+  [GetterThrows]
+  readonly attribute long long lastModified;
+};
+
+dictionary FilePropertyBag {
+  DOMString type = "";
+  long long lastModified;
+};
+
+dictionary ChromeFilePropertyBag : FilePropertyBag {
+  DOMString name = "";
+  boolean temporary = false;
+};
+
+// Mozilla extensions
+partial interface File {
+  [GetterThrows, Deprecated="FileLastModifiedDate"]
+  readonly attribute Date lastModifiedDate;
+
+  [BinaryName="relativePath", Func="mozilla::dom::Directory::WebkitBlinkDirectoryPickerEnabled"]
+  readonly attribute USVString webkitRelativePath;
+
+  [GetterThrows, ChromeOnly]
+  readonly attribute DOMString mozFullPath;
+
+  [ChromeOnly, Throws]
+  static File createFromNsIFile(nsIFile file,
+                                optional ChromeFilePropertyBag options);
+
+  [ChromeOnly, Throws]
+  static File createFromFileName(USVString fileName,
+                                 optional ChromeFilePropertyBag options);
+};
diff --git a/dom/webidl/FileList.webidl b/dom/webidl/FileList.webidl
new file mode 100644
index 000000000..84a56be1b
--- /dev/null
+++ b/dom/webidl/FileList.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2006/webapi/FileAPI/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface FileList {
+  getter File? item(unsigned long index);
+  readonly attribute unsigned long length;
+};
diff --git a/dom/webidl/FileMode.webidl b/dom/webidl/FileMode.webidl
new file mode 100644
index 000000000..788c2c9bf
--- /dev/null
+++ b/dom/webidl/FileMode.webidl
@@ -0,0 +1,5 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+enum FileMode { "readonly", "readwrite" };
diff --git a/dom/webidl/FileReader.webidl b/dom/webidl/FileReader.webidl
new file mode 100644
index 000000000..f3647aea4
--- /dev/null
+++ b/dom/webidl/FileReader.webidl
@@ -0,0 +1,55 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2006/webapi/FileAPI/#dfn-filereader
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor,
+ Exposed=(Window,Worker,System)]
+interface FileReader : EventTarget {
+  // async read methods
+  [Throws]
+  void readAsArrayBuffer(Blob blob);
+  [Throws]
+  void readAsText(Blob blob, optional DOMString label = "");
+  [Throws]
+  void readAsDataURL(Blob blob);
+
+  [Throws]
+  void abort();
+
+  // states
+  const unsigned short EMPTY = 0;
+  const unsigned short LOADING = 1;
+  const unsigned short DONE = 2;
+
+
+  readonly attribute unsigned short readyState;
+
+  // File or Blob data
+  // bug 858217: readonly attribute (DOMString or ArrayBuffer)? result;
+  [Throws]
+  readonly attribute any result;
+
+  readonly attribute DOMError? error;
+
+  // event handler attributes
+  attribute EventHandler onloadstart;
+  attribute EventHandler onprogress;
+  attribute EventHandler onload;
+  attribute EventHandler onabort;
+  attribute EventHandler onerror;
+  attribute EventHandler onloadend;
+};
+
+// Mozilla extensions.
+partial interface FileReader {
+  [Throws]
+  void readAsBinaryString(Blob filedata);
+};
diff --git a/dom/webidl/FileReaderSync.webidl b/dom/webidl/FileReaderSync.webidl
new file mode 100644
index 000000000..8b586f4a7
--- /dev/null
+++ b/dom/webidl/FileReaderSync.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2006/webapi/FileAPI/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor,
+ Exposed=Worker]
+interface FileReaderSync {
+
+  // Synchronously return strings
+
+  [Throws]
+  ArrayBuffer readAsArrayBuffer(Blob blob);
+  [Throws]
+  DOMString readAsBinaryString(Blob blob);
+  [Throws]
+  DOMString readAsText(Blob blob, optional DOMString encoding);
+  [Throws]
+  DOMString readAsDataURL(Blob blob);
+};
diff --git a/dom/webidl/FileSystem.webidl b/dom/webidl/FileSystem.webidl
new file mode 100644
index 000000000..06b88c5ce
--- /dev/null
+++ b/dom/webidl/FileSystem.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+
+dictionary FileSystemFlags {
+    boolean create = false;
+    boolean exclusive = false;
+};
+
+callback interface FileSystemEntryCallback {
+    void handleEvent(FileSystemEntry entry);
+};
+
+callback interface VoidCallback {
+    void handleEvent();
+};
+
+callback interface ErrorCallback {
+    void handleEvent(DOMException err);
+};
+
+interface FileSystem {
+    readonly    attribute USVString name;
+    readonly    attribute FileSystemDirectoryEntry root;
+};
diff --git a/dom/webidl/FileSystemDirectoryEntry.webidl b/dom/webidl/FileSystemDirectoryEntry.webidl
new file mode 100644
index 000000000..f972d216f
--- /dev/null
+++ b/dom/webidl/FileSystemDirectoryEntry.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface FileSystemDirectoryEntry : FileSystemEntry {
+    FileSystemDirectoryReader createReader();
+
+    void getFile(optional USVString? path,
+                 optional FileSystemFlags options,
+                 optional FileSystemEntryCallback successCallback,
+                 optional ErrorCallback errorCallback);
+
+    void getDirectory(optional USVString? path,
+                      optional FileSystemFlags options,
+                      optional FileSystemEntryCallback successCallback,
+                      optional ErrorCallback errorCallback);
+};
diff --git a/dom/webidl/FileSystemDirectoryReader.webidl b/dom/webidl/FileSystemDirectoryReader.webidl
new file mode 100644
index 000000000..3be94830c
--- /dev/null
+++ b/dom/webidl/FileSystemDirectoryReader.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+callback interface FileSystemEntriesCallback {
+    void handleEvent(sequence<FileSystemEntry> entries);
+};
+
+interface FileSystemDirectoryReader {
+
+    // readEntries can be called just once. The second time it returns no data.
+
+    [Throws]
+    void readEntries(FileSystemEntriesCallback successCallback,
+                     optional ErrorCallback errorCallback);
+};
diff --git a/dom/webidl/FileSystemEntry.webidl b/dom/webidl/FileSystemEntry.webidl
new file mode 100644
index 000000000..af112282d
--- /dev/null
+++ b/dom/webidl/FileSystemEntry.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface FileSystemEntry {
+    readonly attribute boolean isFile;
+    readonly attribute boolean isDirectory;
+
+    [GetterThrows]
+    readonly attribute USVString name;
+
+    [GetterThrows]
+    readonly attribute USVString fullPath;
+
+    readonly attribute FileSystem filesystem;
+
+    void getParent(optional FileSystemEntryCallback successCallback,
+                   optional ErrorCallback errorCallback);
+};
diff --git a/dom/webidl/FileSystemFileEntry.webidl b/dom/webidl/FileSystemFileEntry.webidl
new file mode 100644
index 000000000..3f141e54a
--- /dev/null
+++ b/dom/webidl/FileSystemFileEntry.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+callback interface FileCallback {
+    void handleEvent(File file);
+};
+
+interface FileSystemFileEntry : FileSystemEntry {
+    [BinaryName="GetFile"]
+    void file (FileCallback successCallback,
+               optional ErrorCallback errorCallback);
+};
diff --git a/dom/webidl/FocusEvent.webidl b/dom/webidl/FocusEvent.webidl
new file mode 100644
index 000000000..52a2f1fde
--- /dev/null
+++ b/dom/webidl/FocusEvent.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString typeArg, optional FocusEventInit focusEventInitDict)]
+interface FocusEvent : UIEvent {
+  // Introduced in DOM Level 3:
+  readonly attribute EventTarget?   relatedTarget;
+};
+
+dictionary FocusEventInit : UIEventInit {
+    EventTarget? relatedTarget = null;
+};
diff --git a/dom/webidl/FontFace.webidl b/dom/webidl/FontFace.webidl
new file mode 100644
index 000000000..136658cc7
--- /dev/null
+++ b/dom/webidl/FontFace.webidl
@@ -0,0 +1,50 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-font-loading/#fontface-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+typedef (ArrayBuffer or ArrayBufferView) BinaryData;
+
+dictionary FontFaceDescriptors {
+  DOMString style = "normal";
+  DOMString weight = "normal";
+  DOMString stretch = "normal";
+  DOMString unicodeRange = "U+0-10FFFF";
+  DOMString variant = "normal";
+  DOMString featureSettings = "normal";
+  DOMString display = "auto";
+};
+
+enum FontFaceLoadStatus { "unloaded", "loading", "loaded", "error" };
+
+// Bug 1072107 is for exposing this in workers.
+// [Exposed=(Window,Worker)]
+[Constructor(DOMString family,
+             (DOMString or BinaryData) source,
+             optional FontFaceDescriptors descriptors),
+ Pref="layout.css.font-loading-api.enabled"]
+interface FontFace {
+  [SetterThrows] attribute DOMString family;
+  [SetterThrows] attribute DOMString style;
+  [SetterThrows] attribute DOMString weight;
+  [SetterThrows] attribute DOMString stretch;
+  [SetterThrows] attribute DOMString unicodeRange;
+  [SetterThrows] attribute DOMString variant;
+  [SetterThrows] attribute DOMString featureSettings;
+  [SetterThrows, Pref="layout.css.font-display.enabled"] attribute DOMString display;
+
+  readonly attribute FontFaceLoadStatus status;
+
+  [Throws]
+  Promise<FontFace> load();
+
+  [Throws]
+  readonly attribute Promise<FontFace> loaded;
+};
diff --git a/dom/webidl/FontFaceSet.webidl b/dom/webidl/FontFaceSet.webidl
new file mode 100644
index 000000000..7f58fbe5e
--- /dev/null
+++ b/dom/webidl/FontFaceSet.webidl
@@ -0,0 +1,64 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-font-loading/#FontFaceSet-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// To implement FontFaceSet's iterator until we can use setlike.
+dictionary FontFaceSetIteratorResult
+{
+  required any value;
+  required boolean done;
+};
+
+// To implement FontFaceSet's iterator until we can use setlike.
+[NoInterfaceObject]
+interface FontFaceSetIterator {
+  [Throws] FontFaceSetIteratorResult next();
+};
+
+callback FontFaceSetForEachCallback = void (FontFace value, FontFace key, FontFaceSet set);
+
+enum FontFaceSetLoadStatus { "loading", "loaded" };
+
+// Bug 1072762 is for the FontFaceSet constructor.
+// [Constructor(sequence<FontFace> initialFaces)]
+[Pref="layout.css.font-loading-api.enabled"]
+interface FontFaceSet : EventTarget {
+
+  // Emulate setlike behavior until we can use that directly.
+  readonly attribute unsigned long size;
+  [Throws] void add(FontFace font);
+  boolean has(FontFace font);
+  boolean delete(FontFace font);
+  void clear();
+  [NewObject] FontFaceSetIterator entries();
+  // Iterator keys();
+  [NewObject, Alias=keys, Alias="@@iterator"] FontFaceSetIterator values();
+  [Throws] void forEach(FontFaceSetForEachCallback cb, optional any thisArg);
+
+  // -- events for when loading state changes
+  attribute EventHandler onloading;
+  attribute EventHandler onloadingdone;
+  attribute EventHandler onloadingerror;
+
+  // check and start loads if appropriate
+  // and fulfill promise when all loads complete
+  [NewObject] Promise<sequence<FontFace>> load(DOMString font, optional DOMString text = " ");
+
+  // return whether all fonts in the fontlist are loaded
+  // (does not initiate load if not available)
+  [Throws] boolean check(DOMString font, optional DOMString text = " ");
+
+  // async notification that font loading and layout operations are done
+  [Throws] readonly attribute Promise<void> ready;
+
+  // loading state, "loading" while one or more fonts loading, "loaded" otherwise
+  readonly attribute FontFaceSetLoadStatus status;
+};
diff --git a/dom/webidl/FontFaceSetLoadEvent.webidl b/dom/webidl/FontFaceSetLoadEvent.webidl
new file mode 100644
index 000000000..6090d194e
--- /dev/null
+++ b/dom/webidl/FontFaceSetLoadEvent.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-font-loading/#FontFaceSet-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary FontFaceSetLoadEventInit : EventInit {
+  sequence<FontFace> fontfaces = [];
+};
+
+[Constructor(DOMString type, optional FontFaceSetLoadEventInit eventInitDict),
+ Pref="layout.css.font-loading-api.enabled"]
+interface FontFaceSetLoadEvent : Event {
+  [Cached, Constant] readonly attribute sequence<FontFace> fontfaces;
+};
diff --git a/dom/webidl/FontFaceSource.webidl b/dom/webidl/FontFaceSource.webidl
new file mode 100644
index 000000000..96e1c6d76
--- /dev/null
+++ b/dom/webidl/FontFaceSource.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-font-loading/#font-face-source
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface FontFaceSource {
+
+  [Pref="layout.css.font-loading-api.enabled"]
+  readonly attribute FontFaceSet fonts;
+};
diff --git a/dom/webidl/FormData.webidl b/dom/webidl/FormData.webidl
new file mode 100644
index 000000000..16f780d5d
--- /dev/null
+++ b/dom/webidl/FormData.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://xhr.spec.whatwg.org
+ */
+
+typedef (Blob or Directory or USVString) FormDataEntryValue;
+
+[Constructor(optional HTMLFormElement form),
+ Exposed=(Window,Worker)]
+interface FormData {
+  [Throws]
+  void append(USVString name, Blob value, optional USVString filename);
+  [Throws]
+  void append(USVString name, USVString value);
+  void delete(USVString name);
+  FormDataEntryValue? get(USVString name);
+  sequence<FormDataEntryValue> getAll(USVString name);
+  boolean has(USVString name);
+  [Throws]
+  void set(USVString name, Blob value, optional USVString filename);
+  [Throws]
+  void set(USVString name, USVString value);
+  iterable<USVString, FormDataEntryValue>;
+};
diff --git a/dom/webidl/Function.webidl b/dom/webidl/Function.webidl
new file mode 100644
index 000000000..3b44ee111
--- /dev/null
+++ b/dom/webidl/Function.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#functiocn
+ *
+ * © Copyright 2004-2022 Apple Computer, Inc., Mozilla Foundation,
+ * Opera Software ASA and Moonchild Productions. You are granted a license to use,
+ * reproduce and create derivative works of this document.
+ */
+
+callback Function = any(any... arguments);
+
+callback VoidFunction = void ();
diff --git a/dom/webidl/GainNode.webidl b/dom/webidl/GainNode.webidl
new file mode 100644
index 000000000..143325c70
--- /dev/null
+++ b/dom/webidl/GainNode.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface GainNode : AudioNode {
+
+    readonly attribute AudioParam gain;
+
+};
+
+// Mozilla extension
+GainNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Gamepad.webidl b/dom/webidl/Gamepad.webidl
new file mode 100644
index 000000000..d36df735d
--- /dev/null
+++ b/dom/webidl/Gamepad.webidl
@@ -0,0 +1,65 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Pref="dom.gamepad.enabled"]
+interface GamepadButton {
+  readonly    attribute boolean pressed;
+  readonly    attribute double  value;
+};
+
+enum GamepadMappingType {
+  "",
+  "standard"
+};
+
+[Pref="dom.gamepad.enabled"]
+interface Gamepad {
+  /**
+   * An identifier, unique per type of device.
+   */
+  readonly attribute DOMString id;
+
+  /**
+   * The game port index for the device. Unique per device
+   * attached to this system.
+   */
+  readonly attribute unsigned long index;
+
+  /**
+   * The mapping in use for this device. The empty string
+   * indicates that no mapping is in use.
+   */
+  readonly attribute GamepadMappingType mapping;
+
+  /**
+   * true if this gamepad is currently connected to the system.
+   */
+  readonly attribute boolean connected;
+
+  /**
+   * The current state of all buttons on the device, an
+   * array of GamepadButton.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<GamepadButton> buttons;
+
+  /**
+   * The current position of all axes on the device, an
+   * array of doubles.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<double> axes;
+
+  /**
+   * Timestamp from when the data of this device was last updated.
+   */
+  readonly attribute DOMHighResTimeStamp timestamp;
+
+  /**
+   * The current pose of the device, a GamepadPose.
+   */
+  [Pref="dom.gamepad.extensions.enabled"]
+  readonly attribute GamepadPose? pose;
+};
diff --git a/dom/webidl/GamepadAxisMoveEvent.webidl b/dom/webidl/GamepadAxisMoveEvent.webidl
new file mode 100644
index 000000000..7699674b4
--- /dev/null
+++ b/dom/webidl/GamepadAxisMoveEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.gamepad.non_standard_events.enabled",
+ Constructor(DOMString type, optional GamepadAxisMoveEventInit eventInitDict)]
+interface GamepadAxisMoveEvent : GamepadEvent
+{
+  readonly attribute unsigned long axis;
+  readonly attribute double value;
+};
+
+dictionary GamepadAxisMoveEventInit : GamepadEventInit
+{
+  unsigned long axis = 0;
+  double value = 0;
+};
diff --git a/dom/webidl/GamepadButtonEvent.webidl b/dom/webidl/GamepadButtonEvent.webidl
new file mode 100644
index 000000000..b8a9e086b
--- /dev/null
+++ b/dom/webidl/GamepadButtonEvent.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.gamepad.non_standard_events.enabled",
+ Constructor(DOMString type, optional GamepadButtonEventInit eventInitDict)]
+interface GamepadButtonEvent : GamepadEvent
+{
+  readonly attribute unsigned long button;
+};
+
+dictionary GamepadButtonEventInit : GamepadEventInit
+{
+  unsigned long button = 0;
+};
diff --git a/dom/webidl/GamepadEvent.webidl b/dom/webidl/GamepadEvent.webidl
new file mode 100644
index 000000000..f4c3092ac
--- /dev/null
+++ b/dom/webidl/GamepadEvent.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.gamepad.enabled",
+ Constructor(DOMString type, optional GamepadEventInit eventInitDict)]
+interface GamepadEvent : Event
+{
+  readonly attribute Gamepad? gamepad;
+};
+
+dictionary GamepadEventInit : EventInit
+{
+  Gamepad? gamepad = null;
+};
diff --git a/dom/webidl/GamepadPose.webidl b/dom/webidl/GamepadPose.webidl
new file mode 100644
index 000000000..4b8420090
--- /dev/null
+++ b/dom/webidl/GamepadPose.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.gamepad.extensions.enabled"]
+interface GamepadPose
+{
+  readonly attribute boolean hasOrientation;
+  readonly attribute boolean hasPosition;
+
+  /**
+   * position, linearVelocity, and linearAcceleration are 3-component vectors.
+   * position is relative to a sitting space. Transforming this point with
+   * VRStageParameters.sittingToStandingTransform converts this to standing space.
+   */
+  [Constant, Throws] readonly attribute Float32Array? position;
+  [Constant, Throws] readonly attribute Float32Array? linearVelocity;
+  [Constant, Throws] readonly attribute Float32Array? linearAcceleration;
+
+  /* orientation is a 4-entry array representing the components of a quaternion. */
+  [Constant, Throws] readonly attribute Float32Array? orientation;
+  /* angularVelocity and angularAcceleration are the components of 3-dimensional vectors. */
+  [Constant, Throws] readonly attribute Float32Array? angularVelocity;
+  [Constant, Throws] readonly attribute Float32Array? angularAcceleration;
+};
diff --git a/dom/webidl/GamepadServiceTest.webidl b/dom/webidl/GamepadServiceTest.webidl
new file mode 100644
index 000000000..7b52625c1
--- /dev/null
+++ b/dom/webidl/GamepadServiceTest.webidl
@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Pref="dom.gamepad.test.enabled"]
+interface GamepadServiceTest
+{
+  readonly attribute unsigned long noMapping;
+  readonly attribute unsigned long standardMapping;
+
+  [Throws]
+  Promise<unsigned long> addGamepad(DOMString id,
+                                    unsigned long mapping,
+                                    unsigned long numButtons,
+                                    unsigned long numAxes);
+
+  void removeGamepad(unsigned long index);
+
+  void newButtonEvent(unsigned long index,
+                      unsigned long button,
+                      boolean pressed);
+
+  void newButtonValueEvent(unsigned long index,
+                           unsigned long button,
+                           boolean pressed,
+                           double value);
+
+  void newAxisMoveEvent(unsigned long index,
+                        unsigned long axis,
+                        double value);
+};
\ No newline at end of file
diff --git a/dom/webidl/Geolocation.webidl b/dom/webidl/Geolocation.webidl
new file mode 100644
index 000000000..35acaa186
--- /dev/null
+++ b/dom/webidl/Geolocation.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/geolocation-API
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary PositionOptions {
+  boolean enableHighAccuracy = false;
+  [Clamp] unsigned long timeout = 0x7fffffff;
+  [Clamp] unsigned long maximumAge = 0;
+};
+
+[NoInterfaceObject]
+interface Geolocation {
+  [Throws]
+  void getCurrentPosition(PositionCallback successCallback,
+                          optional PositionErrorCallback? errorCallback = null,
+                          optional PositionOptions options);
+
+  [Throws]
+  long watchPosition(PositionCallback successCallback,
+                     optional PositionErrorCallback? errorCallback = null,
+                     optional PositionOptions options);
+
+  void clearWatch(long watchId);
+};
+
+callback PositionCallback = void (Position position);
+
+callback PositionErrorCallback = void (PositionError positionError);
diff --git a/dom/webidl/GeometryUtils.webidl b/dom/webidl/GeometryUtils.webidl
new file mode 100644
index 000000000..7a468baa1
--- /dev/null
+++ b/dom/webidl/GeometryUtils.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/cssom-view/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum CSSBoxType { "margin", "border", "padding", "content" };
+dictionary BoxQuadOptions {
+  CSSBoxType box = "border";
+  GeometryNode relativeTo;
+};
+
+dictionary ConvertCoordinateOptions {
+  CSSBoxType fromBox = "border";
+  CSSBoxType toBox = "border";
+};
+
+[NoInterfaceObject]
+interface GeometryUtils {
+  [Throws, Func="nsINode::HasBoxQuadsSupport"]
+  sequence<DOMQuad> getBoxQuads(optional BoxQuadOptions options);
+  [Throws, Pref="layout.css.convertFromNode.enabled"]
+  DOMQuad convertQuadFromNode(DOMQuad quad, GeometryNode from, optional ConvertCoordinateOptions options);
+  [Throws, Pref="layout.css.convertFromNode.enabled"]
+  DOMQuad convertRectFromNode(DOMRectReadOnly rect, GeometryNode from, optional ConvertCoordinateOptions options);
+  [Throws, Pref="layout.css.convertFromNode.enabled"]
+  DOMPoint convertPointFromNode(DOMPointInit point, GeometryNode from, optional ConvertCoordinateOptions options);
+};
+
+// PseudoElement implements GeometryUtils;
+
+typedef (Text or Element /* or PseudoElement */ or Document) GeometryNode;
diff --git a/dom/webidl/GetUserMediaRequest.webidl b/dom/webidl/GetUserMediaRequest.webidl
new file mode 100644
index 000000000..9fd378e6e
--- /dev/null
+++ b/dom/webidl/GetUserMediaRequest.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This is an internal IDL file
+ */
+
+[NoInterfaceObject]
+interface GetUserMediaRequest {
+  readonly attribute unsigned long long windowID;
+  readonly attribute unsigned long long innerWindowID;
+  readonly attribute DOMString callID;
+  MediaStreamConstraints getConstraints();
+  readonly attribute boolean isSecure;
+};
diff --git a/dom/webidl/Grid.webidl b/dom/webidl/Grid.webidl
new file mode 100644
index 000000000..b10de9383
--- /dev/null
+++ b/dom/webidl/Grid.webidl
@@ -0,0 +1,113 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/* These objects support visualization of a css-grid by the dev tools. */
+
+/**
+ * Explicit and implicit types apply to tracks, lines, and areas.
+ * https://drafts.csswg.org/css-grid/#explicit-grids
+ * https://drafts.csswg.org/css-grid/#implicit-grids
+ */
+enum GridDeclaration { "explicit", "implicit" };
+
+/**
+ * Tracks expanded from auto-fill are repeat , auto-fits with elements are
+ * also repeat, auto-fits with no elements are removed, other tracks are static.
+ */
+enum GridTrackState { "static", "repeat", "removed" };
+
+[ChromeOnly]
+interface Grid
+{
+  readonly attribute GridDimension rows;
+  readonly attribute GridDimension cols;
+  [Cached, Constant]
+  readonly attribute sequence<GridArea> areas;
+};
+
+[ChromeOnly]
+interface GridDimension
+{
+  readonly attribute GridLines lines;
+  readonly attribute GridTracks tracks;
+};
+
+[ChromeOnly]
+interface GridLines
+{
+  readonly attribute unsigned long length;
+
+  /**
+   * This accessor method allows array-like access to lines.
+   * @param index A 0-indexed value.
+   */
+  getter GridLine? item(unsigned long index);
+};
+
+[ChromeOnly]
+interface GridLine
+{
+  /**
+   * Names include both explicit names and implicit names, which will be
+   * assigned if the line contributes to a named area.
+   * https://drafts.csswg.org/css-grid/#implicit-named-lines
+   */
+  [Cached, Constant]
+  readonly attribute sequence<DOMString> names;
+
+  readonly attribute double start;
+
+  /**
+   * Breadth is the gap between the start of this line and the start of the
+   * next track in flow direction. It primarily is set by use of the -gap
+   * properties.
+   * https://drafts.csswg.org/css-grid/#gutters
+   */
+  readonly attribute double breadth;
+
+  readonly attribute GridDeclaration type;
+
+  /**
+   * Number is the 1-indexed index of the line in flow order.
+   */
+  readonly attribute unsigned long number;
+};
+
+[ChromeOnly]
+interface GridTracks
+{
+  readonly attribute unsigned long length;
+
+  /**
+   * This accessor method allows array-like access to tracks.
+   * @param index A 0-indexed value.
+   */
+  getter GridTrack? item(unsigned long index);
+};
+
+[ChromeOnly]
+interface GridTrack
+{
+  readonly attribute double start;
+  readonly attribute double breadth;
+  readonly attribute GridDeclaration type;
+  readonly attribute GridTrackState state;
+};
+
+[ChromeOnly]
+interface GridArea
+{
+  readonly attribute DOMString name;
+  readonly attribute GridDeclaration type;
+
+  /**
+   * These values are 1-indexed line numbers bounding the area.
+   */
+  readonly attribute unsigned long rowStart;
+  readonly attribute unsigned long rowEnd;
+  readonly attribute unsigned long columnStart;
+  readonly attribute unsigned long columnEnd;
+};
diff --git a/dom/webidl/HTMLAllCollection.webidl b/dom/webidl/HTMLAllCollection.webidl
new file mode 100644
index 000000000..b35213888
--- /dev/null
+++ b/dom/webidl/HTMLAllCollection.webidl
@@ -0,0 +1,14 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Emulates undefined through Codegen.py. */
+[LegacyUnenumerableNamedProperties]
+interface HTMLAllCollection {
+  readonly attribute unsigned long length;
+  getter Node? (unsigned long index);
+  Node? item(unsigned long index);
+  (Node or HTMLCollection)? item(DOMString name);
+  legacycaller (Node or HTMLCollection)? (DOMString name);
+  getter (Node or HTMLCollection)? namedItem(DOMString name);
+};
diff --git a/dom/webidl/HTMLAnchorElement.webidl b/dom/webidl/HTMLAnchorElement.webidl
new file mode 100644
index 000000000..0326dff6a
--- /dev/null
+++ b/dom/webidl/HTMLAnchorElement.webidl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-a-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-a-element
+[HTMLConstructor]
+interface HTMLAnchorElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString target;
+           [CEReactions, SetterThrows]
+           attribute DOMString download;
+           [CEReactions, SetterThrows]
+           attribute DOMString ping;
+           [CEReactions, SetterThrows]
+           attribute DOMString rel;
+           [CEReactions, SetterThrows, Pref="network.http.enablePerElementReferrer"]
+           attribute DOMString referrerPolicy;
+           [PutForwards=value]
+  readonly attribute DOMTokenList relList;
+           [CEReactions, SetterThrows]
+           attribute DOMString hreflang;
+           [CEReactions, SetterThrows]
+           attribute DOMString type;
+
+           [CEReactions, SetterThrows]
+           attribute DOMString text;
+};
+
+HTMLAnchorElement implements HTMLHyperlinkElementUtils;
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLAnchorElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString coords;
+           [CEReactions, SetterThrows]
+           attribute DOMString charset;
+           [CEReactions, SetterThrows]
+           attribute DOMString name;
+           [CEReactions, SetterThrows]
+           attribute DOMString rev;
+           [CEReactions, SetterThrows]
+           attribute DOMString shape;
+};
diff --git a/dom/webidl/HTMLAppletElement.webidl b/dom/webidl/HTMLAppletElement.webidl
new file mode 100644
index 000000000..d75c42d15
--- /dev/null
+++ b/dom/webidl/HTMLAppletElement.webidl
@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-applet-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-applet-element
+[NeedResolve, UnsafeInPrerendering]
+interface HTMLAppletElement : HTMLElement {
+  [Pure, SetterThrows]
+           attribute DOMString align;
+  [Pure, SetterThrows]
+           attribute DOMString alt;
+  [Pure, SetterThrows]
+           attribute DOMString archive;
+  [Pure, SetterThrows]
+           attribute DOMString code;
+  [Pure, SetterThrows]
+           attribute DOMString codeBase;
+  [Pure, SetterThrows]
+           attribute DOMString height;
+  [Pure, SetterThrows]
+           attribute unsigned long hspace;
+  [Pure, SetterThrows]
+           attribute DOMString name;
+  [Pure, SetterThrows]
+           attribute DOMString _object;
+  [Pure, SetterThrows]
+           attribute unsigned long vspace;
+  [Pure, SetterThrows]
+           attribute DOMString width;
+};
+
+HTMLAppletElement implements MozImageLoadingContent;
+HTMLAppletElement implements MozFrameLoaderOwner;
+HTMLAppletElement implements MozObjectLoadingContent;
diff --git a/dom/webidl/HTMLAreaElement.webidl b/dom/webidl/HTMLAreaElement.webidl
new file mode 100644
index 000000000..0980d178a
--- /dev/null
+++ b/dom/webidl/HTMLAreaElement.webidl
@@ -0,0 +1,44 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-area-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ &
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-area-element
+[HTMLConstructor]
+interface HTMLAreaElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString alt;
+           [CEReactions, SetterThrows]
+           attribute DOMString coords;
+           [CEReactions, SetterThrows]
+           attribute DOMString shape;
+           [CEReactions, SetterThrows]
+           attribute DOMString target;
+           [CEReactions, SetterThrows]
+           attribute DOMString download;
+           [CEReactions, SetterThrows]
+           attribute DOMString ping;
+           [CEReactions, SetterThrows]
+           attribute DOMString rel;
+           [SetterThrows, Pref="network.http.enablePerElementReferrer"]
+           attribute DOMString referrerPolicy;
+           [PutForwards=value]
+  readonly attribute DOMTokenList relList;
+};
+
+HTMLAreaElement implements HTMLHyperlinkElementUtils;
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLAreaElement {
+           [CEReactions, SetterThrows]
+           attribute boolean noHref;
+};
diff --git a/dom/webidl/HTMLAudioElement.webidl b/dom/webidl/HTMLAudioElement.webidl
new file mode 100644
index 000000000..725669839
--- /dev/null
+++ b/dom/webidl/HTMLAudioElement.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-audio-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor, NamedConstructor=Audio(optional DOMString src)]
+interface HTMLAudioElement : HTMLMediaElement {};
+
diff --git a/dom/webidl/HTMLBRElement.webidl b/dom/webidl/HTMLBRElement.webidl
new file mode 100644
index 000000000..b0b0f80ed
--- /dev/null
+++ b/dom/webidl/HTMLBRElement.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-br-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-br-element
+[HTMLConstructor]
+interface HTMLBRElement : HTMLElement {};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLBRElement {
+             [CEReactions, SetterThrows]
+             attribute DOMString clear;
+};
+
diff --git a/dom/webidl/HTMLBaseElement.webidl b/dom/webidl/HTMLBaseElement.webidl
new file mode 100644
index 000000000..ed86f8c77
--- /dev/null
+++ b/dom/webidl/HTMLBaseElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-base-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-base-element
+[HTMLConstructor]
+interface HTMLBaseElement : HTMLElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString href;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString target;
+};
+
diff --git a/dom/webidl/HTMLBodyElement.webidl b/dom/webidl/HTMLBodyElement.webidl
new file mode 100644
index 000000000..f89c287d7
--- /dev/null
+++ b/dom/webidl/HTMLBodyElement.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLBodyElement : HTMLElement {
+};
+
+partial interface HTMLBodyElement {
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString text;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString link;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString vLink;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString aLink;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString bgColor;
+  [CEReactions, SetterThrows]
+  attribute DOMString background;
+};
+
+HTMLBodyElement implements WindowEventHandlers;
diff --git a/dom/webidl/HTMLButtonElement.webidl b/dom/webidl/HTMLButtonElement.webidl
new file mode 100644
index 000000000..f129dbd7b
--- /dev/null
+++ b/dom/webidl/HTMLButtonElement.webidl
@@ -0,0 +1,49 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-button-element
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-button-element
+[HTMLConstructor]
+interface HTMLButtonElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean autofocus;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean disabled;
+  [Pure]
+  readonly attribute HTMLFormElement? form;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString formAction;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString formEnctype;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString formMethod;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean formNoValidate;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString formTarget;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString type;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString value;
+// Not yet implemented:
+//           attribute HTMLMenuElement? menu;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  readonly attribute NodeList labels;
+};
diff --git a/dom/webidl/HTMLCanvasElement.webidl b/dom/webidl/HTMLCanvasElement.webidl
new file mode 100644
index 000000000..b567c69eb
--- /dev/null
+++ b/dom/webidl/HTMLCanvasElement.webidl
@@ -0,0 +1,68 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-canvas-element
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface nsISupports;
+interface Variant;
+
+[HTMLConstructor]
+interface HTMLCanvasElement : HTMLElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long width;
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long height;
+
+  [Throws]
+  nsISupports? getContext(DOMString contextId, optional any contextOptions = null);
+
+  [Throws]
+  DOMString toDataURL(optional DOMString type = "",
+                      optional any encoderOptions);
+  [Throws]
+  void toBlob(BlobCallback _callback,
+              optional DOMString type = "",
+              optional any encoderOptions);
+};
+
+// Mozilla specific bits
+partial interface HTMLCanvasElement {
+  [Pure, SetterThrows]
+           attribute boolean mozOpaque;
+  [Throws]
+  File mozGetAsFile(DOMString name, optional DOMString? type = null);
+  [ChromeOnly, Throws]
+  nsISupports? MozGetIPCContext(DOMString contextId);
+           attribute PrintCallback? mozPrintCallback;
+
+  [Throws, UnsafeInPrerendering, Pref="canvas.capturestream.enabled"]
+  CanvasCaptureMediaStream captureStream(optional double frameRate);
+};
+
+// For OffscreenCanvas
+// Reference: https://wiki.whatwg.org/wiki/OffscreenCanvas
+partial interface HTMLCanvasElement {
+  [Pref="gfx.offscreencanvas.enabled", Throws]
+  OffscreenCanvas transferControlToOffscreen();
+};
+
+[ChromeOnly]
+interface MozCanvasPrintState
+{
+  // A canvas rendering context.
+  readonly attribute nsISupports context;
+
+  // To be called when rendering to the context is done.
+  void done();
+};
+
+callback PrintCallback = void(MozCanvasPrintState ctx);
+
+callback BlobCallback = void(Blob blob);
diff --git a/dom/webidl/HTMLCollection.webidl b/dom/webidl/HTMLCollection.webidl
new file mode 100644
index 000000000..f7f020c0f
--- /dev/null
+++ b/dom/webidl/HTMLCollection.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[LegacyUnenumerableNamedProperties]
+interface HTMLCollection {
+  readonly attribute unsigned long length;
+  getter Element? item(unsigned long index);
+  getter Element? namedItem(DOMString name);
+};
diff --git a/dom/webidl/HTMLDListElement.webidl b/dom/webidl/HTMLDListElement.webidl
new file mode 100644
index 000000000..4cf1c2183
--- /dev/null
+++ b/dom/webidl/HTMLDListElement.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-dl-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-dl-element
+[HTMLConstructor]
+interface HTMLDListElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLDListElement {
+           [CEReactions, SetterThrows]
+           attribute boolean compact;
+};
diff --git a/dom/webidl/HTMLDataElement.webidl b/dom/webidl/HTMLDataElement.webidl
new file mode 100644
index 000000000..d24537871
--- /dev/null
+++ b/dom/webidl/HTMLDataElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-data-element
+ */
+
+[HTMLConstructor]
+interface HTMLDataElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString value;
+};
diff --git a/dom/webidl/HTMLDataListElement.webidl b/dom/webidl/HTMLDataListElement.webidl
new file mode 100644
index 000000000..4c38fddf3
--- /dev/null
+++ b/dom/webidl/HTMLDataListElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLDataListElement : HTMLElement {
+  readonly attribute HTMLCollection options;
+};
diff --git a/dom/webidl/HTMLDetailsElement.webidl b/dom/webidl/HTMLDetailsElement.webidl
new file mode 100644
index 000000000..0ef20428f
--- /dev/null
+++ b/dom/webidl/HTMLDetailsElement.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/forms.html#the-details-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor, Pref="dom.details_element.enabled"]
+interface HTMLDetailsElement : HTMLElement {
+  [CEReactions, SetterThrows]
+  attribute boolean open;
+};
diff --git a/dom/webidl/HTMLDialogElement.webidl b/dom/webidl/HTMLDialogElement.webidl
new file mode 100644
index 000000000..563740c87
--- /dev/null
+++ b/dom/webidl/HTMLDialogElement.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/forms.html#the-dialog-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[Pref="dom.dialog_element.enabled"]
+interface HTMLDialogElement : HTMLElement {
+  [CEReactions, SetterThrows]
+  attribute boolean open;
+  attribute DOMString returnValue;
+  [CEReactions]
+  void show();
+  [CEReactions, Throws]
+  void showModal();
+  [CEReactions]
+  void close(optional DOMString returnValue);
+};
diff --git a/dom/webidl/HTMLDirectoryElement.webidl b/dom/webidl/HTMLDirectoryElement.webidl
new file mode 100644
index 000000000..65becbb60
--- /dev/null
+++ b/dom/webidl/HTMLDirectoryElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+[HTMLConstructor]
+interface HTMLDirectoryElement : HTMLElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute boolean compact;
+};
+
diff --git a/dom/webidl/HTMLDivElement.webidl b/dom/webidl/HTMLDivElement.webidl
new file mode 100644
index 000000000..2b762c6fa
--- /dev/null
+++ b/dom/webidl/HTMLDivElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLDivElement : HTMLElement {};
+
+partial interface HTMLDivElement {
+  [CEReactions, SetterThrows]
+           attribute DOMString align;
+};
diff --git a/dom/webidl/HTMLDocument.webidl b/dom/webidl/HTMLDocument.webidl
new file mode 100644
index 000000000..ffa38d97d
--- /dev/null
+++ b/dom/webidl/HTMLDocument.webidl
@@ -0,0 +1,97 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[OverrideBuiltins]
+interface HTMLDocument : Document {
+           [SetterThrows]
+           attribute DOMString domain;
+           [Throws]
+           attribute DOMString cookie;
+  // DOM tree accessors
+  [Throws]
+  getter object (DOMString name);
+  [CEReactions, Pure, SetterThrows]
+           attribute HTMLElement? body;
+  [Pure]
+  readonly attribute HTMLHeadElement? head;
+  [Pure]
+  readonly attribute HTMLCollection images;
+  [Pure]
+  readonly attribute HTMLCollection embeds;
+  [Pure]
+  readonly attribute HTMLCollection plugins;
+  [Pure]
+  readonly attribute HTMLCollection links;
+  [Pure]
+  readonly attribute HTMLCollection forms;
+  [Pure]
+  readonly attribute HTMLCollection scripts;
+  NodeList getElementsByName(DOMString elementName);
+
+  // dynamic markup insertion
+  [CEReactions, Throws]
+  Document open(optional DOMString type = "text/html", optional DOMString replace = "");
+  [CEReactions, Throws]
+  WindowProxy? open(DOMString url, DOMString name, DOMString features, optional boolean replace = false);
+  [CEReactions, Throws]
+  void close();
+  [CEReactions, Throws]
+  void write(DOMString... text);
+  [CEReactions, Throws]
+  void writeln(DOMString... text);
+
+  [CEReactions, SetterThrows, NeedsSubjectPrincipal]
+           attribute DOMString designMode;
+  [CEReactions, Throws]
+  boolean execCommand(DOMString commandId, optional boolean showUI = false,
+                      optional DOMString value = "");
+  [Throws]
+  boolean queryCommandEnabled(DOMString commandId);
+  [Throws]
+  boolean queryCommandIndeterm(DOMString commandId);
+  [Throws]
+  boolean queryCommandState(DOMString commandId);
+  boolean queryCommandSupported(DOMString commandId);
+  [Throws]
+  DOMString queryCommandValue(DOMString commandId);
+
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString fgColor;
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString linkColor;
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString vlinkColor;
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString alinkColor;
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString bgColor;
+
+  [Pure]
+  readonly attribute HTMLCollection anchors;
+  [Pure]
+  readonly attribute HTMLCollection applets;
+
+  void clear();
+
+  readonly attribute HTMLAllCollection all;
+
+  // @deprecated These are old Netscape 4 methods. Do not use,
+  //             the implementation is no-op.
+  // XXXbz do we actually need these anymore?
+  void                      captureEvents();
+  void                      releaseEvents();
+};
+
+partial interface HTMLDocument {
+  /*
+   * Number of nodes that have been blocked by
+   * the Safebrowsing API to prevent tracking.
+   */
+  [ChromeOnly, Pure]
+  readonly attribute long blockedTrackingNodeCount;
+
+  /*
+   * List of nodes that have been blocked by
+   * the Safebrowsing API to prevent tracking.
+   */
+  [ChromeOnly, Pure]
+  readonly attribute NodeList blockedTrackingNodes;
+};
diff --git a/dom/webidl/HTMLElement.webidl b/dom/webidl/HTMLElement.webidl
new file mode 100644
index 000000000..cd1fd7d6a
--- /dev/null
+++ b/dom/webidl/HTMLElement.webidl
@@ -0,0 +1,108 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/ and
+ * http://dev.w3.org/csswg/cssom-view/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLElement : Element {
+  // metadata attributes
+  [CEReactions]
+           attribute DOMString title;
+  [CEReactions]
+           attribute DOMString lang;
+  //         attribute boolean translate;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString dir;
+  [Constant]
+  readonly attribute DOMStringMap dataset;
+
+  [CEReactions, GetterThrows, Pure, TreatNullAs=EmptyString]
+           attribute DOMString innerText;
+
+  // user interaction
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean hidden;
+  void click();
+  [CEReactions, SetterThrows, Pure]
+           attribute long tabIndex;
+  [Throws]
+  void focus();
+  [Throws]
+  void blur();
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString accessKey;
+  [Pure]
+  readonly attribute DOMString accessKeyLabel;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean draggable;
+  //[PutForwards=value] readonly attribute DOMTokenList dropzone;
+  [SetterThrows, Pure]
+           attribute DOMString contentEditable;
+  [Pure]
+  readonly attribute boolean isContentEditable;
+  [Pure, Pref="dom.menuitem.enabled"]
+  readonly attribute HTMLMenuElement? contextMenu;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean spellcheck;
+
+  // command API
+  //readonly attribute DOMString? commandType;
+  //readonly attribute DOMString? commandLabel;
+  //readonly attribute DOMString? commandIcon;
+  //readonly attribute boolean? commandHidden;
+  //readonly attribute boolean? commandDisabled;
+  //readonly attribute boolean? commandChecked;
+
+  // styling
+  [PutForwards=cssText, Constant]
+  readonly attribute CSSStyleDeclaration style;
+
+  // Mozilla specific stuff
+           attribute EventHandler oncopy;
+           attribute EventHandler oncut;
+           attribute EventHandler onpaste;
+};
+
+// http://dev.w3.org/csswg/cssom-view/#extensions-to-the-htmlelement-interface
+partial interface HTMLElement {
+  // CSSOM things are not [Pure] because they can flush
+  readonly attribute Element? offsetParent;
+  readonly attribute long offsetTop;
+  readonly attribute long offsetLeft;
+  readonly attribute long offsetWidth;
+  readonly attribute long offsetHeight;
+};
+
+// Extension for scroll-grabbing, used in the B2G dynamic toolbar.
+// This is likely to be revised.
+partial interface HTMLElement {
+  [Func="nsGenericHTMLElement::IsScrollGrabAllowed"]
+           attribute boolean scrollgrab;
+};
+
+[NoInterfaceObject]
+interface TouchEventHandlers {
+  [Func="nsGenericHTMLElement::TouchEventsEnabled"]
+           attribute EventHandler ontouchstart;
+  [Func="nsGenericHTMLElement::TouchEventsEnabled"]
+           attribute EventHandler ontouchend;
+  [Func="nsGenericHTMLElement::TouchEventsEnabled"]
+           attribute EventHandler ontouchmove;
+  [Func="nsGenericHTMLElement::TouchEventsEnabled"]
+           attribute EventHandler ontouchcancel;
+};
+
+HTMLElement implements GlobalEventHandlers;
+HTMLElement implements TouchEventHandlers;
+HTMLElement implements OnErrorEventHandlerForNodes;
+
+interface HTMLUnknownElement : HTMLElement {};
diff --git a/dom/webidl/HTMLEmbedElement.webidl b/dom/webidl/HTMLEmbedElement.webidl
new file mode 100644
index 000000000..9c5361221
--- /dev/null
+++ b/dom/webidl/HTMLEmbedElement.webidl
@@ -0,0 +1,46 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-embed-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#HTMLEmbedElement-partial
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-embed-element
+[HTMLConstructor, NeedResolve]
+interface HTMLEmbedElement : HTMLElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString src;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString type;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString width;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString height;
+  [Throws]
+  legacycaller any (any... arguments);
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#HTMLEmbedElement-partial
+partial interface HTMLEmbedElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString align;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString name;
+};
+
+partial interface HTMLEmbedElement {
+  // GetSVGDocument
+  [NeedsSubjectPrincipal]
+  Document? getSVGDocument();
+};
+
+HTMLEmbedElement implements MozImageLoadingContent;
+HTMLEmbedElement implements MozFrameLoaderOwner;
+HTMLEmbedElement implements MozObjectLoadingContent;
diff --git a/dom/webidl/HTMLFieldSetElement.webidl b/dom/webidl/HTMLFieldSetElement.webidl
new file mode 100644
index 000000000..63393bf42
--- /dev/null
+++ b/dom/webidl/HTMLFieldSetElement.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-fieldset-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLFieldSetElement : HTMLElement {
+  [CEReactions, SetterThrows]
+           attribute boolean disabled;
+  readonly attribute HTMLFormElement? form;
+  [CEReactions, SetterThrows]
+           attribute DOMString name;
+
+  readonly attribute DOMString type;
+
+  readonly attribute HTMLCollection elements;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+
+  boolean checkValidity();
+  boolean reportValidity();
+
+  void setCustomValidity(DOMString error);
+};
diff --git a/dom/webidl/HTMLFontElement.webidl b/dom/webidl/HTMLFontElement.webidl
new file mode 100644
index 000000000..8db6d3246
--- /dev/null
+++ b/dom/webidl/HTMLFontElement.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLFontElement : HTMLElement {
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows] attribute DOMString color;
+  [CEReactions, SetterThrows]                          attribute DOMString face;
+  [CEReactions, SetterThrows]                          attribute DOMString size;
+};
diff --git a/dom/webidl/HTMLFormControlsCollection.webidl b/dom/webidl/HTMLFormControlsCollection.webidl
new file mode 100644
index 000000000..eb2d83d42
--- /dev/null
+++ b/dom/webidl/HTMLFormControlsCollection.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#htmlformcontrolscollection
+ *
+ * © Copyright 2004-2013 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface HTMLFormControlsCollection : HTMLCollection {
+  // inherits length and item()
+  /* legacycaller */ getter (RadioNodeList or Element)? namedItem(DOMString name); // shadows inherited namedItem()
+};
diff --git a/dom/webidl/HTMLFormElement.webidl b/dom/webidl/HTMLFormElement.webidl
new file mode 100644
index 000000000..064fe9fad
--- /dev/null
+++ b/dom/webidl/HTMLFormElement.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#htmlformelement
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[OverrideBuiltins, LegacyUnenumerableNamedProperties, HTMLConstructor]
+interface HTMLFormElement : HTMLElement {
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString acceptCharset;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString action;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString autocomplete;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString enctype;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString encoding;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString method;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString name;
+           [CEReactions, Pure, SetterThrows]
+           attribute boolean noValidate;
+           [CEReactions, Pure, SetterThrows]
+           attribute DOMString target;
+
+  [Constant]
+  readonly attribute HTMLCollection elements;
+  [Pure]
+  readonly attribute long length;
+
+  getter Element (unsigned long index);
+  // TODO this should be: getter (RadioNodeList or HTMLInputElement or HTMLImageElement) (DOMString name);
+  getter nsISupports (DOMString name);
+
+  [Throws]
+  void submit();
+  [CEReactions]
+  void reset();
+  boolean checkValidity();
+  boolean reportValidity();
+
+  [Pref="dom.forms.requestAutocomplete"]
+  void requestAutocomplete();
+};
diff --git a/dom/webidl/HTMLFrameElement.webidl b/dom/webidl/HTMLFrameElement.webidl
new file mode 100644
index 000000000..c3ba0de63
--- /dev/null
+++ b/dom/webidl/HTMLFrameElement.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#htmlframeelement
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#htmlframeelement
+[HTMLConstructor]
+interface HTMLFrameElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString name;
+           [CEReactions, SetterThrows]
+           attribute DOMString scrolling;
+           [CEReactions, SetterThrows]
+           attribute DOMString src;
+           [CEReactions, SetterThrows]
+           attribute DOMString frameBorder;
+           [CEReactions, SetterThrows]
+           attribute DOMString longDesc;
+           [CEReactions, SetterThrows]
+           attribute boolean noResize;
+  [NeedsSubjectPrincipal]
+  readonly attribute Document? contentDocument;
+  readonly attribute WindowProxy? contentWindow;
+
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString marginHeight;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+  attribute DOMString marginWidth;
+};
+
+HTMLFrameElement implements MozFrameLoaderOwner;
diff --git a/dom/webidl/HTMLFrameSetElement.webidl b/dom/webidl/HTMLFrameSetElement.webidl
new file mode 100644
index 000000000..afc4465d1
--- /dev/null
+++ b/dom/webidl/HTMLFrameSetElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLFrameSetElement : HTMLElement {
+  [CEReactions, SetterThrows]
+  attribute DOMString cols;
+  [CEReactions, SetterThrows]
+  attribute DOMString rows;
+};
+
+HTMLFrameSetElement implements WindowEventHandlers;
diff --git a/dom/webidl/HTMLHRElement.webidl b/dom/webidl/HTMLHRElement.webidl
new file mode 100644
index 000000000..24ba3112a
--- /dev/null
+++ b/dom/webidl/HTMLHRElement.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-hr-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-hr-element
+[HTMLConstructor]
+interface HTMLHRElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLHRElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString color;
+           [CEReactions, SetterThrows]
+           attribute boolean noShade;
+           [CEReactions, SetterThrows]
+           attribute DOMString size;
+           [CEReactions, SetterThrows]
+           attribute DOMString width;
+};
diff --git a/dom/webidl/HTMLHeadElement.webidl b/dom/webidl/HTMLHeadElement.webidl
new file mode 100644
index 000000000..b649712a6
--- /dev/null
+++ b/dom/webidl/HTMLHeadElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-head-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-head-element
+[HTMLConstructor]
+interface HTMLHeadElement : HTMLElement {};
+
diff --git a/dom/webidl/HTMLHeadingElement.webidl b/dom/webidl/HTMLHeadingElement.webidl
new file mode 100644
index 000000000..a39e24cfb
--- /dev/null
+++ b/dom/webidl/HTMLHeadingElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
+[HTMLConstructor]
+interface HTMLHeadingElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLHeadingElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+};
diff --git a/dom/webidl/HTMLHtmlElement.webidl b/dom/webidl/HTMLHtmlElement.webidl
new file mode 100644
index 000000000..5b2a9a926
--- /dev/null
+++ b/dom/webidl/HTMLHtmlElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-html-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-html-element
+[HTMLConstructor]
+interface HTMLHtmlElement : HTMLElement {};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLHtmlElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString version;
+};
diff --git a/dom/webidl/HTMLHyperlinkElementUtils.webidl b/dom/webidl/HTMLHyperlinkElementUtils.webidl
new file mode 100644
index 000000000..ae53fd75e
--- /dev/null
+++ b/dom/webidl/HTMLHyperlinkElementUtils.webidl
@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/semantics.html#htmlhyperlinkelementutils
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[NoInterfaceObject]
+interface HTMLHyperlinkElementUtils {
+  // Bug 824857: no support for stringifier attributes yet.
+  //  stringifier attribute USVString href;
+
+  // Bug 824857 should remove this.
+  stringifier;
+
+  [CEReactions, SetterThrows]
+           attribute USVString href;
+
+  readonly attribute USVString origin;
+  [CEReactions]
+           attribute USVString protocol;
+  [CEReactions]
+           attribute USVString username;
+  [CEReactions]
+           attribute USVString password;
+  [CEReactions]
+           attribute USVString host;
+  [CEReactions]
+           attribute USVString hostname;
+  [CEReactions]
+           attribute USVString port;
+  [CEReactions]
+           attribute USVString pathname;
+  [CEReactions]
+           attribute USVString search;
+  [CEReactions]
+           attribute USVString hash;
+};
diff --git a/dom/webidl/HTMLIFrameElement.webidl b/dom/webidl/HTMLIFrameElement.webidl
new file mode 100644
index 000000000..d2859c6db
--- /dev/null
+++ b/dom/webidl/HTMLIFrameElement.webidl
@@ -0,0 +1,73 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-iframe-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLIFrameElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString src;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString srcdoc;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [PutForwards=value] readonly attribute DOMTokenList sandbox;
+           // attribute boolean seamless;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean allowFullscreen;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString width;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString height;
+  [CEReactions, SetterThrows, Pure, Pref="network.http.enablePerElementReferrer"]
+           attribute DOMString referrerPolicy;
+  [NeedsSubjectPrincipal]
+  readonly attribute Document? contentDocument;
+  readonly attribute WindowProxy? contentWindow;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLIFrameElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString align;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString scrolling;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString frameBorder;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString longDesc;
+
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows, Pure]
+           attribute DOMString marginHeight;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows, Pure]
+           attribute DOMString marginWidth;
+};
+
+partial interface HTMLIFrameElement {
+  // GetSVGDocument
+  [NeedsSubjectPrincipal]
+  Document? getSVGDocument();
+};
+
+partial interface HTMLIFrameElement {
+  // nsIDOMMozBrowserFrame
+  [ChromeOnly,SetterThrows]
+           attribute boolean mozbrowser;
+};
+
+partial interface HTMLIFrameElement {
+  // nsIMozBrowserFrame
+  [ChromeOnly]
+  readonly attribute DOMString appManifestURL;
+};
+
+HTMLIFrameElement implements MozFrameLoaderOwner;
+HTMLIFrameElement implements BrowserElement;
diff --git a/dom/webidl/HTMLImageElement.webidl b/dom/webidl/HTMLImageElement.webidl
new file mode 100644
index 000000000..e50a9ef8e
--- /dev/null
+++ b/dom/webidl/HTMLImageElement.webidl
@@ -0,0 +1,111 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#htmlimageelement
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface imgINotificationObserver;
+interface imgIRequest;
+interface URI;
+interface nsIStreamListener;
+
+[HTMLConstructor,
+ NamedConstructor=Image(optional unsigned long width, optional unsigned long height)]
+interface HTMLImageElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString alt;
+           [CEReactions, SetterThrows]
+           attribute DOMString src;
+           [CEReactions, SetterThrows]
+           attribute DOMString srcset;
+           [CEReactions, SetterThrows]
+           attribute DOMString? crossOrigin;
+           [CEReactions, SetterThrows]
+           attribute DOMString useMap;
+           [CEReactions, SetterThrows, Pref="network.http.enablePerElementReferrer"]
+           attribute DOMString referrerPolicy;
+           [CEReactions, SetterThrows]
+           attribute boolean isMap;
+           [CEReactions, SetterThrows]
+           attribute unsigned long width;
+           [CEReactions, SetterThrows]
+           attribute unsigned long height;
+  readonly attribute unsigned long naturalWidth;
+  readonly attribute unsigned long naturalHeight;
+  readonly attribute boolean complete;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLImageElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString name;
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute unsigned long hspace;
+           [CEReactions, SetterThrows]
+           attribute unsigned long vspace;
+           [CEReactions, SetterThrows]
+           attribute DOMString longDesc;
+
+  [CEReactions, TreatNullAs=EmptyString,SetterThrows] attribute DOMString border;
+};
+
+// [Update me: not in whatwg spec yet]
+// http://picture.responsiveimages.org/#the-img-element
+partial interface HTMLImageElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString sizes;
+  readonly attribute DOMString currentSrc;
+};
+
+// Mozilla extensions.
+partial interface HTMLImageElement {
+           [CEReactions]
+           attribute DOMString lowsrc;
+
+  // These attributes are offsets from the closest view (to mimic
+  // NS4's "offset-from-layer" behavior).
+  readonly attribute long x;
+  readonly attribute long y;
+};
+
+[NoInterfaceObject]
+interface MozImageLoadingContent {
+  // Mirrored chrome-only nsIImageLoadingContent methods.  Please make sure
+  // to update this list if nsIImageLoadingContent changes.
+  [ChromeOnly]
+  const long UNKNOWN_REQUEST = -1;
+  [ChromeOnly]
+  const long CURRENT_REQUEST = 0;
+  [ChromeOnly]
+  const long PENDING_REQUEST = 1;
+
+  [ChromeOnly]
+  attribute boolean loadingEnabled;
+  [ChromeOnly]
+  readonly attribute short imageBlockingStatus;
+  [ChromeOnly]
+  void addObserver(imgINotificationObserver aObserver);
+  [ChromeOnly]
+  void removeObserver(imgINotificationObserver aObserver);
+  [ChromeOnly,Throws]
+  imgIRequest? getRequest(long aRequestType);
+  [ChromeOnly,Throws]
+  long getRequestType(imgIRequest aRequest);
+  [ChromeOnly,Throws]
+  readonly attribute URI? currentURI;
+  [ChromeOnly,Throws]
+  void forceReload(optional boolean aNotify);
+  [ChromeOnly]
+  void forceImageState(boolean aForce, unsigned long long aState);
+};
+
+HTMLImageElement implements MozImageLoadingContent;
diff --git a/dom/webidl/HTMLInputElement.webidl b/dom/webidl/HTMLInputElement.webidl
new file mode 100644
index 000000000..93ad90f45
--- /dev/null
+++ b/dom/webidl/HTMLInputElement.webidl
@@ -0,0 +1,282 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-input-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+enum SelectionMode {
+  "select",
+  "start",
+  "end",
+  "preserve",
+};
+
+interface nsIControllers;
+
+[HTMLConstructor]
+interface HTMLInputElement : HTMLElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString accept;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString alt;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString autocomplete;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean autofocus;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean defaultChecked;
+  [Pure]
+           attribute boolean checked;
+           // Bug 850337 - attribute DOMString dirName;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean disabled;
+  readonly attribute HTMLFormElement? form;
+  [Pure]
+  readonly attribute FileList? files;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString formAction;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString formEnctype;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString formMethod;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean formNoValidate;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString formTarget;
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long height;
+  [Pure]
+           attribute boolean indeterminate;
+  [CEReactions, Pure, SetterThrows, Pref="dom.forms.inputmode"]
+           attribute DOMString inputMode;
+  [Pure]
+  readonly attribute HTMLElement? list;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString max;
+  [CEReactions, Pure, SetterThrows]
+           attribute long maxLength;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString min;
+  [CEReactions, Pure, SetterThrows]
+           attribute long minLength;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean multiple;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString name;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString pattern;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString placeholder;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean readOnly;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean required;
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long size;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString src;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString step;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString type;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString defaultValue;
+  [CEReactions, Pure, TreatNullAs=EmptyString, Throws]
+           attribute DOMString value;
+  [Throws, Func="HTMLInputElement::ValueAsDateEnabled"]
+           attribute Date? valueAsDate;
+  [Pure, SetterThrows]
+           attribute unrestricted double valueAsNumber;
+  [CEReactions]
+           attribute unsigned long width;
+
+  [Throws]
+  void stepUp(optional long n = 1);
+  [Throws]
+  void stepDown(optional long n = 1);
+
+  [Pure]
+  readonly attribute boolean willValidate;
+  [Pure]
+  readonly attribute ValidityState validity;
+  [GetterThrows]
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  readonly attribute NodeList? labels;
+
+  void select();
+
+  [Throws]
+           // TODO: unsigned vs signed
+           attribute long? selectionStart;
+  [Throws]
+           attribute long? selectionEnd;
+  [Throws]
+           attribute DOMString? selectionDirection;
+  [Throws]
+  void setRangeText(DOMString replacement);
+  [Throws]
+  void setRangeText(DOMString replacement, unsigned long start,
+    unsigned long end, optional SelectionMode selectionMode = "preserve");
+
+  // also has obsolete members
+};
+
+partial interface HTMLInputElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString align;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString useMap;
+};
+
+// Mozilla extensions
+
+partial interface HTMLInputElement {
+  [Throws]
+  void setSelectionRange(long start, long end, optional DOMString direction);
+
+  [GetterThrows, ChromeOnly]
+  readonly attribute nsIControllers        controllers;
+  [GetterThrows]
+  readonly attribute long                  textLength;
+
+  [Throws, ChromeOnly]
+  sequence<DOMString> mozGetFileNameArray();
+
+  [ChromeOnly, Throws]
+  void mozSetFileNameArray(sequence<DOMString> fileNames);
+
+  [ChromeOnly]
+  void mozSetFileArray(sequence<File> files);
+
+  // This method is meant to use for testing only.
+  [ChromeOnly, Throws]
+  void mozSetDirectory(DOMString directoryPath);
+
+  // This method is meant to use for testing only.
+  [ChromeOnly]
+  void mozSetDndFilesAndDirectories(sequence<(File or Directory)> list);
+
+  // Number controls (<input type=number>) have an anonymous text control
+  // (<input type=text>) in the anonymous shadow tree that they contain. On
+  // such an anonymous text control this property provides access to the
+  // number control that owns the text control. This is useful, for example,
+  // in code that looks at the currently focused element to make decisions
+  // about which IME to bring up. Such code needs to be able to check for any
+  // owning number control since it probably wants to bring up a number pad
+  // instead of the standard keyboard, even when the anonymous text control has
+  // focus.
+  [ChromeOnly]
+  readonly attribute HTMLInputElement? ownerNumberControl;
+
+  boolean mozIsTextField(boolean aExcludePassword);
+
+  [ChromeOnly]
+  // This function will return null if @autocomplete is not defined for the
+  // current @type
+  AutocompleteInfo? getAutocompleteInfo();
+};
+
+partial interface HTMLInputElement {
+  // Mirrored chrome-only nsIDOMNSEditableElement methods.  Please make sure
+  // to update this list if nsIDOMNSEditableElement changes.
+
+  [Pure, ChromeOnly]
+  readonly attribute nsIEditor? editor;
+
+  // This is similar to set .value on nsIDOMInput/TextAreaElements, but handling
+  // of the value change is closer to the normal user input, so 'change' event
+  // for example will be dispatched when focusing out the element.
+  [Func="IsChromeOrXBL", NeedsSubjectPrincipal]
+  void setUserInput(DOMString input);
+};
+
+partial interface HTMLInputElement {
+  [Pref="dom.input.dirpicker", SetterThrows]
+  attribute boolean allowdirs;
+
+  [Pref="dom.input.dirpicker"]
+  readonly attribute boolean isFilesAndDirectoriesSupported;
+
+  [Throws, Pref="dom.input.dirpicker"]
+  Promise<sequence<(File or Directory)>> getFilesAndDirectories();
+
+  [Throws, Pref="dom.input.dirpicker"]
+  Promise<sequence<File>> getFiles(optional boolean recursiveFlag = false);
+
+  [Throws, Pref="dom.input.dirpicker"]
+  void chooseDirectory();
+};
+
+[NoInterfaceObject]
+interface MozPhonetic {
+  [Pure, ChromeOnly]
+  readonly attribute DOMString phonetic;
+};
+
+HTMLInputElement implements MozImageLoadingContent;
+HTMLInputElement implements MozPhonetic;
+
+// Webkit/Blink
+partial interface HTMLInputElement {
+  [Pref="dom.webkitBlink.filesystem.enabled", Frozen, Cached, Pure]
+  readonly attribute sequence<FileSystemEntry> webkitEntries;
+
+  [Pref="dom.webkitBlink.dirPicker.enabled", BinaryName="WebkitDirectoryAttr", SetterThrows]
+          attribute boolean webkitdirectory;
+};
+
+dictionary DateTimeValue {
+  long hour;
+  long minute;
+  long year;
+  long month;
+  long day;
+};
+
+partial interface HTMLInputElement {
+  [Pref="dom.forms.datetime", ChromeOnly]
+  DateTimeValue getDateTimeInputBoxValue();
+
+  [Pref="dom.forms.datetime", ChromeOnly]
+  void updateDateTimeInputBox(optional DateTimeValue value);
+
+  [Pref="dom.forms.datetime", ChromeOnly]
+  void setDateTimePickerState(boolean open);
+
+  [Pref="dom.forms.datetime", ChromeOnly,
+   BinaryName="getMinimumAsDouble"]
+  double getMinimum();
+
+  [Pref="dom.forms.datetime", ChromeOnly,
+   BinaryName="getMaximumAsDouble"]
+  double getMaximum();
+
+  [Pref="dom.forms.datetime", Func="IsChromeOrXBL"]
+  void openDateTimePicker(optional DateTimeValue initialValue);
+
+  [Pref="dom.forms.datetime", Func="IsChromeOrXBL"]
+  void updateDateTimePicker(optional DateTimeValue value);
+
+  [Pref="dom.forms.datetime", Func="IsChromeOrXBL"]
+  void closeDateTimePicker();
+
+  [Pref="dom.forms.datetime", Func="IsChromeOrXBL",
+   BinaryName="getStepAsDouble"]
+  double getStep();
+
+  [Pref="dom.forms.datetime", Func="IsChromeOrXBL",
+   BinaryName="getStepBaseAsDouble"]
+  double getStepBase();
+};
diff --git a/dom/webidl/HTMLLIElement.webidl b/dom/webidl/HTMLLIElement.webidl
new file mode 100644
index 000000000..3f104d09e
--- /dev/null
+++ b/dom/webidl/HTMLLIElement.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-li-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-li-element
+[HTMLConstructor]
+interface HTMLLIElement : HTMLElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute long value;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLLIElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString type;
+};
diff --git a/dom/webidl/HTMLLabelElement.webidl b/dom/webidl/HTMLLabelElement.webidl
new file mode 100644
index 000000000..4b624dfaf
--- /dev/null
+++ b/dom/webidl/HTMLLabelElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLLabelElement : HTMLElement {
+  readonly attribute HTMLFormElement? form;
+  [CEReactions]
+           attribute DOMString htmlFor;
+  readonly attribute HTMLElement? control;
+};
diff --git a/dom/webidl/HTMLLegendElement.webidl b/dom/webidl/HTMLLegendElement.webidl
new file mode 100644
index 000000000..6f03ecf1b
--- /dev/null
+++ b/dom/webidl/HTMLLegendElement.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-legend-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-legend-element
+[HTMLConstructor]
+interface HTMLLegendElement : HTMLElement {
+  readonly attribute HTMLFormElement? form;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLLegendElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+};
diff --git a/dom/webidl/HTMLLinkElement.webidl b/dom/webidl/HTMLLinkElement.webidl
new file mode 100644
index 000000000..0089ab84e
--- /dev/null
+++ b/dom/webidl/HTMLLinkElement.webidl
@@ -0,0 +1,61 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-link-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-link-element
+[HTMLConstructor]
+interface HTMLLinkElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean disabled;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString href;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString? crossOrigin;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString rel;
+  [PutForwards=value]
+  readonly attribute DOMTokenList relList;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString media;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString nonce;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString hreflang;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString type;
+  [CEReactions, SetterThrows, Pure, Pref="network.http.enablePerElementReferrer"]
+           attribute DOMString referrerPolicy;
+  [PutForwards=value] readonly attribute DOMTokenList sizes;
+};
+HTMLLinkElement implements LinkStyle;
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLLinkElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString charset;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString rev;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString target;
+};
+
+// http://w3c.github.io/webcomponents/spec/imports/#interface-import
+partial interface HTMLLinkElement {
+    [Func="nsDocument::IsWebComponentsEnabled"]
+    readonly attribute Document? import;
+};
+
+// https://w3c.github.io/webappsec/specs/subresourceintegrity/#htmllinkelement-1
+partial interface HTMLLinkElement {
+  [CEReactions, SetterThrows]
+  attribute DOMString integrity;
+};
diff --git a/dom/webidl/HTMLMapElement.webidl b/dom/webidl/HTMLMapElement.webidl
new file mode 100644
index 000000000..199c70876
--- /dev/null
+++ b/dom/webidl/HTMLMapElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-map-element
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-map-element
+[HTMLConstructor]
+interface HTMLMapElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [Constant]
+  readonly attribute HTMLCollection areas;
+  // Not supported yet.
+  //readonly attribute HTMLCollection images;
+};
diff --git a/dom/webidl/HTMLMediaElement.webidl b/dom/webidl/HTMLMediaElement.webidl
new file mode 100644
index 000000000..7f0f9f857
--- /dev/null
+++ b/dom/webidl/HTMLMediaElement.webidl
@@ -0,0 +1,208 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#media-elements
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface HTMLMediaElement : HTMLElement {
+
+  // error state
+  readonly attribute MediaError? error;
+
+  // network state
+  [CEReactions, SetterThrows]
+           attribute DOMString src;
+  readonly attribute DOMString currentSrc;
+
+  [CEReactions, SetterThrows]
+           attribute DOMString? crossOrigin;
+  const unsigned short NETWORK_EMPTY = 0;
+  const unsigned short NETWORK_IDLE = 1;
+  const unsigned short NETWORK_LOADING = 2;
+  const unsigned short NETWORK_NO_SOURCE = 3;
+  readonly attribute unsigned short networkState;
+  [CEReactions, SetterThrows]
+           attribute DOMString preload;
+  [NewObject]
+  readonly attribute TimeRanges buffered;
+  void load();
+  DOMString canPlayType(DOMString type);
+
+  // ready state
+  const unsigned short HAVE_NOTHING = 0;
+  const unsigned short HAVE_METADATA = 1;
+  const unsigned short HAVE_CURRENT_DATA = 2;
+  const unsigned short HAVE_FUTURE_DATA = 3;
+  const unsigned short HAVE_ENOUGH_DATA = 4;
+  readonly attribute unsigned short readyState;
+  readonly attribute boolean seeking;
+
+  // playback state
+  [SetterThrows]
+           attribute double currentTime;
+  [Throws]
+  void fastSeek(double time);
+  readonly attribute unrestricted double duration;
+  [ChromeOnly]
+  readonly attribute boolean isEncrypted;
+  // TODO: Bug 847376 - readonly attribute any startDate;
+  readonly attribute boolean paused;
+  [SetterThrows]
+           attribute double defaultPlaybackRate;
+  [SetterThrows]
+           attribute double playbackRate;
+  [NewObject]
+  readonly attribute TimeRanges played;
+  [NewObject]
+  readonly attribute TimeRanges seekable;
+  readonly attribute boolean ended;
+  [CEReactions, SetterThrows]
+           attribute boolean autoplay;
+  [CEReactions, SetterThrows]
+           attribute boolean loop;
+  [Throws]
+  Promise<void> play();
+  [Throws]
+  void pause();
+
+  // TODO: Bug 847377 - mediaGroup and MediaController
+  // media controller
+  //         attribute DOMString mediaGroup;
+  //         attribute MediaController? controller;
+
+  // controls
+  [CEReactions, SetterThrows]
+           attribute boolean controls;
+  [SetterThrows]
+           attribute double volume;
+           attribute boolean muted;
+  [CEReactions, SetterThrows]
+           attribute boolean defaultMuted;
+
+  // TODO: Bug 847379
+  // tracks
+  [Pref="media.track.enabled"]
+  readonly attribute AudioTrackList audioTracks;
+  [Pref="media.track.enabled"]
+  readonly attribute VideoTrackList videoTracks;
+  readonly attribute TextTrackList? textTracks;
+  TextTrack addTextTrack(TextTrackKind kind,
+                         optional DOMString label = "",
+                         optional DOMString language = "");
+};
+
+// Mozilla extensions:
+partial interface HTMLMediaElement {
+  [ChromeOnly]
+  readonly attribute MediaSource? mozMediaSourceObject;
+  [ChromeOnly]
+  readonly attribute DOMString mozDebugReaderData;
+
+  [Pref="media.test.dumpDebugInfo"]
+  void mozDumpDebugInfo();
+
+  attribute MediaStream? srcObject;
+  // TODO: remove prefixed version soon (1183495).
+  attribute MediaStream? mozSrcObject;
+
+  attribute boolean mozPreservesPitch;
+  readonly attribute boolean mozAutoplayEnabled;
+
+  // NB: for internal use with the video controls:
+  [Func="IsChromeOrXBL"] attribute boolean mozAllowCasting;
+  [Func="IsChromeOrXBL"] attribute boolean mozIsCasting;
+
+  // Mozilla extension: stream capture
+  [Throws, UnsafeInPrerendering]
+  MediaStream mozCaptureStream();
+  [Throws, UnsafeInPrerendering]
+  MediaStream mozCaptureStreamUntilEnded();
+  readonly attribute boolean mozAudioCaptured;
+
+  // Mozilla extension: return embedded metadata from the stream as a
+  // JSObject with key:value pairs for each tag. This can be used by
+  // player interfaces to display the song title, artist, etc.
+  [Throws]
+  object? mozGetMetadata();
+
+  // Mozilla extension: provides access to the fragment end time if
+  // the media element has a fragment URI for the currentSrc, otherwise
+  // it is equal to the media duration.
+  readonly attribute double mozFragmentEnd;
+
+  // Mozilla extension: an audio channel type for media elements.
+  // Read AudioChannel.webidl for more information about this attribute.
+  [SetterThrows, Pref="media.useAudioChannelAPI"]
+  attribute AudioChannel mozAudioChannelType;
+
+  // In addition the media element has this new events:
+  // * onmozinterruptbegin - called when the media element is interrupted
+  //   because of the audiochannel manager.
+  // * onmozinterruptend - called when the interruption is concluded
+  [Pref="media.useAudioChannelAPI"]
+  attribute EventHandler onmozinterruptbegin;
+
+  [Pref="media.useAudioChannelAPI"]
+  attribute EventHandler onmozinterruptend;
+};
+
+// This is just for testing
+partial interface HTMLMediaElement {
+  [Pref="media.useAudioChannelService.testing"]
+  readonly attribute double computedVolume;
+  [Pref="media.useAudioChannelService.testing"]
+  readonly attribute boolean computedMuted;
+  [Pref="media.useAudioChannelService.testing"]
+  readonly attribute unsigned long computedSuspended;
+};
+
+/*
+ * HTMLMediaElement::seekToNextFrame() is a Mozilla experimental feature.
+ *
+ * The SeekToNextFrame() method provides a way to access a video element's video
+ * frames one by one without going through the realtime playback. So, it lets
+ * authors use "frame" as unit to access the video element's underlying data,
+ * instead of "time".
+ *
+ * The SeekToNextFrame() is a kind of seek operation, so normally, once it is
+ * invoked, a "seeking" event is dispatched. However, if the media source has no
+ * video data or is not seekable, the operation is ignored without filing the
+ * "seeking" event.
+ *
+ * Once the SeekToNextFrame() is done, a "seeked" event should always be filed
+ * and a "ended" event might also be filed depends on where the media element's
+ * position before seeking was. There are two cases:
+ * Assume the media source has n+1 video frames where n is a non-negative
+ * integers and the frame sequence is indexed from zero.
+ * (1) If the currentTime is at anywhere smaller than the n-th frame's beginning
+ *     time, say the currentTime is now pointing to a position which is smaller
+ *     than the x-th frame's beginning time and larger or equal to the (x-1)-th
+ *     frame's beginning time, where x belongs to [1, n], then the
+ *     SeekToNextFrame() operation seeks the media to the x-th frame, sets the
+ *     media's currentTime to the x-th frame's beginning time and dispatches a
+ *     "seeked" event.
+ * (2) Otherwise, if the currentTime is larger or equal to the n-th frame's
+ *     beginning time, then the SeekToNextFrame() operation sets the media's
+ *     currentTime to the duration of the media source and dispatches a "seeked"
+ *     event and an "ended" event.
+ */
+partial interface HTMLMediaElement {
+  [Throws, Pref="media.seekToNextFrame.enabled"]
+  Promise<void> seekToNextFrame();
+};
+
+/*
+ * This is an API for simulating visibility changes to help debug and write
+ * tests about suspend-video-decoding.
+ */
+partial interface HTMLMediaElement {
+  [Pref="media.test.setVisible"]
+  void setVisible(boolean aVisible);
+};
diff --git a/dom/webidl/HTMLMenuElement.webidl b/dom/webidl/HTMLMenuElement.webidl
new file mode 100644
index 000000000..dc9a78ae8
--- /dev/null
+++ b/dom/webidl/HTMLMenuElement.webidl
@@ -0,0 +1,60 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-menu-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface MenuBuilder;
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-menu-element
+[HTMLConstructor]
+interface HTMLMenuElement : HTMLElement {
+           [CEReactions, SetterThrows, Pref="dom.menuitem.enabled"]
+           attribute DOMString type;
+           [CEReactions, SetterThrows, Pref="dom.menuitem.enabled"]
+           attribute DOMString label;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLMenuElement {
+           [CEReactions, SetterThrows]
+           attribute boolean compact;
+};
+
+// Mozilla specific stuff
+partial interface HTMLMenuElement {
+  /**
+   * Creates and dispatches a trusted event named "show".
+   * The event is not cancelable and does not bubble.
+   * See http://www.whatwg.org/specs/web-apps/current-work/multipage/interactive-elements.html#context-menus
+   */
+  [ChromeOnly]
+  void sendShowEvent();
+
+  /**
+   * Creates a native menu builder. The builder type is dependent on menu type.
+   * Currently, it returns the @mozilla.org/content/html-menu-builder;1
+   * component. Toolbar menus are not yet supported (the method returns null).
+   */
+  [ChromeOnly]
+  MenuBuilder? createBuilder();
+
+  /*
+   * Builds a menu by iterating over menu children.
+   * See http://www.whatwg.org/specs/web-apps/current-work/multipage/interactive-elements.html#building-menus-and-toolbars
+   * The caller can use a native builder by calling createBuilder() or provide
+   * a custom builder that implements the nsIMenuBuilder interface.
+   * A custom builder can be used for example to build native context menus
+   * that are not defined using <menupopup>.
+   */
+  [ChromeOnly]
+  void build(MenuBuilder aBuilder);
+};
diff --git a/dom/webidl/HTMLMenuItemElement.webidl b/dom/webidl/HTMLMenuItemElement.webidl
new file mode 100644
index 000000000..6005bd7d2
--- /dev/null
+++ b/dom/webidl/HTMLMenuItemElement.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-menuitem-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-menuitem-element
+[HTMLConstructor, Pref="dom.menuitem.enabled"]
+interface HTMLMenuItemElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString type;
+           [CEReactions, SetterThrows]
+           attribute DOMString label;
+           [CEReactions, SetterThrows]
+           attribute DOMString icon;
+           [CEReactions, SetterThrows]
+           attribute boolean disabled;
+           [CEReactions, SetterThrows]
+           attribute boolean checked;
+           [CEReactions, SetterThrows]
+           attribute DOMString radiogroup;
+
+           // This should be 'default' but in the IDL implementation
+           // this has been renamed 'defaultChecked'.
+           [CEReactions, SetterThrows]
+           attribute boolean defaultChecked;
+
+           // Currently not implemented.
+//  readonly attribute HTMLElement? command;
+};
diff --git a/dom/webidl/HTMLMetaElement.webidl b/dom/webidl/HTMLMetaElement.webidl
new file mode 100644
index 000000000..30014a955
--- /dev/null
+++ b/dom/webidl/HTMLMetaElement.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-meta-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-meta-element
+[HTMLConstructor]
+interface HTMLMetaElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString httpEquiv;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString content;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLMetaElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString scheme;
+};
diff --git a/dom/webidl/HTMLMeterElement.webidl b/dom/webidl/HTMLMeterElement.webidl
new file mode 100644
index 000000000..8f93bd71e
--- /dev/null
+++ b/dom/webidl/HTMLMeterElement.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-meter-element	
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-meter-element
+[HTMLConstructor]
+interface HTMLMeterElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute double value;
+           [CEReactions, SetterThrows]
+           attribute double min;
+           [CEReactions, SetterThrows]
+           attribute double max;
+           [CEReactions, SetterThrows]
+           attribute double low;
+           [CEReactions, SetterThrows]
+           attribute double high;
+           [CEReactions, SetterThrows]
+           attribute double optimum;
+
+           readonly attribute NodeList labels;
+};
diff --git a/dom/webidl/HTMLModElement.webidl b/dom/webidl/HTMLModElement.webidl
new file mode 100644
index 000000000..8ed8b994b
--- /dev/null
+++ b/dom/webidl/HTMLModElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#attributes-common-to-ins-and-del-elements
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#attributes-common-to-ins-and-del-elements
+[HTMLConstructor]
+interface HTMLModElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString cite;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString dateTime;
+};
diff --git a/dom/webidl/HTMLOListElement.webidl b/dom/webidl/HTMLOListElement.webidl
new file mode 100644
index 000000000..93084c227
--- /dev/null
+++ b/dom/webidl/HTMLOListElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-ol-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-ol-element
+[HTMLConstructor]
+interface HTMLOListElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute boolean reversed;
+           [CEReactions, SetterThrows]
+           attribute long start;
+           [CEReactions, SetterThrows]
+           attribute DOMString type;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLOListElement {
+           [CEReactions, SetterThrows]
+           attribute boolean compact;
+};
diff --git a/dom/webidl/HTMLObjectElement.webidl b/dom/webidl/HTMLObjectElement.webidl
new file mode 100644
index 000000000..7c9f7f8bc
--- /dev/null
+++ b/dom/webidl/HTMLObjectElement.webidl
@@ -0,0 +1,225 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-object-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#HTMLObjectElement-partial
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-object-element
+[HTMLConstructor, NeedResolve, UnsafeInPrerendering]
+interface HTMLObjectElement : HTMLElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString data;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString type;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean typeMustMatch;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString name;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString useMap;
+  [Pure]
+  readonly attribute HTMLFormElement? form;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString width;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString height;
+  // Not pure: can trigger about:blank instantiation
+  [NeedsSubjectPrincipal]
+  readonly attribute Document? contentDocument;
+  // Not pure: can trigger about:blank instantiation
+  [NeedsSubjectPrincipal]
+  readonly attribute WindowProxy? contentWindow;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  [Throws]
+  legacycaller any (any... arguments);
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#HTMLObjectElement-partial
+partial interface HTMLObjectElement {
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString align;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString archive;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString code;
+  [CEReactions, Pure, SetterThrows]
+           attribute boolean declare;
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long hspace;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString standby;
+  [CEReactions, Pure, SetterThrows]
+           attribute unsigned long vspace;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString codeBase;
+  [CEReactions, Pure, SetterThrows]
+           attribute DOMString codeType;
+
+  [CEReactions, TreatNullAs=EmptyString, Pure, SetterThrows]
+           attribute DOMString border;
+};
+
+partial interface HTMLObjectElement {
+  // GetSVGDocument
+  [NeedsSubjectPrincipal]
+  Document? getSVGDocument();
+};
+
+[NoInterfaceObject]
+interface MozObjectLoadingContent {
+  // Mirrored chrome-only scriptable nsIObjectLoadingContent methods.  Please
+  // make sure to update this list if nsIObjectLoadingContent changes.  Also,
+  // make sure everything on here is [ChromeOnly].
+  [ChromeOnly]
+  const unsigned long TYPE_LOADING  = 0;
+  [ChromeOnly]
+  const unsigned long TYPE_IMAGE    = 1;
+  [ChromeOnly]
+  const unsigned long TYPE_PLUGIN   = 2;
+  [ChromeOnly]
+  const unsigned long TYPE_DOCUMENT = 3;
+  [ChromeOnly]
+  const unsigned long TYPE_NULL     = 4;
+
+  // The content type is not supported (e.g. plugin not installed)
+  [ChromeOnly]
+  const unsigned long PLUGIN_UNSUPPORTED          = 0;
+  // Showing alternate content
+  [ChromeOnly]
+  const unsigned long PLUGIN_ALTERNATE            = 1;
+  // The plugin exists, but is disabled
+  [ChromeOnly]
+  const unsigned long PLUGIN_DISABLED             = 2;
+  // The plugin is blocklisted and disabled
+  [ChromeOnly]
+  const unsigned long PLUGIN_BLOCKLISTED          = 3;
+  // The plugin is considered outdated, but not disabled
+  [ChromeOnly]
+  const unsigned long PLUGIN_OUTDATED             = 4;
+  // The plugin has crashed
+  [ChromeOnly]
+  const unsigned long PLUGIN_CRASHED              = 5;
+  // Suppressed by security policy
+  [ChromeOnly]
+  const unsigned long PLUGIN_SUPPRESSED           = 6;
+  // Blocked by content policy
+  [ChromeOnly]
+  const unsigned long PLUGIN_USER_DISABLED        = 7;
+  /// ** All values >= PLUGIN_CLICK_TO_PLAY are plugin placeholder types that
+  ///    would be replaced by a real plugin if activated (playPlugin())
+  /// ** Furthermore, values >= PLUGIN_CLICK_TO_PLAY and
+  ///    <= PLUGIN_VULNERABLE_NO_UPDATE are click-to-play types.
+  // The plugin is disabled until the user clicks on it
+  [ChromeOnly]
+  const unsigned long PLUGIN_CLICK_TO_PLAY        = 8;
+  // The plugin is vulnerable (update available)
+  [ChromeOnly]
+  const unsigned long PLUGIN_VULNERABLE_UPDATABLE = 9;
+  // The plugin is vulnerable (no update available)
+  [ChromeOnly]
+  const unsigned long PLUGIN_VULNERABLE_NO_UPDATE = 10;
+
+  /**
+   * The actual mime type (the one we got back from the network
+   * request) for the element.
+   */
+  [ChromeOnly]
+  readonly attribute DOMString actualType;
+
+  /**
+   * Gets the type of the content that's currently loaded. See
+   * the constants above for the list of possible values.
+   */
+  [ChromeOnly]
+  readonly attribute unsigned long displayedType;
+
+  /**
+   * Gets the content type that corresponds to the give MIME type.  See the
+   * constants above for the list of possible values.  If nothing else fits,
+   * TYPE_NULL will be returned.
+   */
+  [ChromeOnly]
+  unsigned long getContentTypeForMIMEType(DOMString aMimeType);
+
+
+  [ChromeOnly]
+  sequence<MozPluginParameter> getPluginAttributes();
+
+  [ChromeOnly]
+  sequence<MozPluginParameter> getPluginParameters();
+
+  /**
+   * This method will play a plugin that has been stopped by the click-to-play
+   * feature.
+   */
+  [ChromeOnly, Throws]
+  void playPlugin();
+
+  /**
+   * Forces a re-evaluation and reload of the tag, optionally invalidating its
+   * click-to-play state.  This can be used when the MIME type that provides a
+   * type has changed, for instance, to force the tag to re-evalulate the
+   * handler to use.
+   */
+  [ChromeOnly, Throws]
+  void reload(boolean aClearActivation);
+
+  /**
+   * This attribute will return true if the current content type has been
+   * activated, either explicitly or by passing checks that would have it be
+   * click-to-play.
+   */
+  [ChromeOnly]
+  readonly attribute boolean activated;
+
+  /**
+   * The URL of the data/src loaded in the object. This may be null (i.e.
+   * an <embed> with no src).
+   */
+  [ChromeOnly]
+  readonly attribute URI? srcURI;
+
+  [ChromeOnly]
+  readonly attribute unsigned long defaultFallbackType;
+
+  [ChromeOnly]
+  readonly attribute unsigned long pluginFallbackType;
+
+  /**
+   * If this object currently owns a running plugin, regardless of whether or
+   * not one is pending spawn/despawn.
+   */
+  [ChromeOnly]
+  readonly attribute boolean hasRunningPlugin;
+
+  [ChromeOnly, Throws]
+  readonly attribute unsigned long runID;
+};
+
+/**
+ * Name:Value pair type used for passing parameters to NPAPI or javascript
+ * plugins.
+ */
+dictionary MozPluginParameter {
+  DOMString name = "";
+  DOMString value = "";
+};
+
+HTMLObjectElement implements MozImageLoadingContent;
+HTMLObjectElement implements MozFrameLoaderOwner;
+HTMLObjectElement implements MozObjectLoadingContent;
diff --git a/dom/webidl/HTMLOptGroupElement.webidl b/dom/webidl/HTMLOptGroupElement.webidl
new file mode 100644
index 000000000..d46fb869d
--- /dev/null
+++ b/dom/webidl/HTMLOptGroupElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-optgroup-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLOptGroupElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute boolean disabled;
+           [CEReactions, SetterThrows]
+           attribute DOMString label;
+};
diff --git a/dom/webidl/HTMLOptionElement.webidl b/dom/webidl/HTMLOptionElement.webidl
new file mode 100644
index 000000000..b94afa3e9
--- /dev/null
+++ b/dom/webidl/HTMLOptionElement.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-option-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor, NamedConstructor=Option(optional DOMString text, optional DOMString value, optional boolean defaultSelected, optional boolean selected)]
+interface HTMLOptionElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute boolean disabled;
+  readonly attribute HTMLFormElement? form;
+           [CEReactions, SetterThrows]
+           attribute DOMString label;
+           [CEReactions, SetterThrows]
+           attribute boolean defaultSelected;
+           [CEReactions, SetterThrows]
+           attribute boolean selected;
+           [CEReactions, SetterThrows]
+           attribute DOMString value;
+
+           [CEReactions, SetterThrows]
+           attribute DOMString text;
+  readonly attribute long index;
+};
diff --git a/dom/webidl/HTMLOptionsCollection.webidl b/dom/webidl/HTMLOptionsCollection.webidl
new file mode 100644
index 000000000..d8d1046ad
--- /dev/null
+++ b/dom/webidl/HTMLOptionsCollection.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-html5-20120329/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface HTMLOptionsCollection : HTMLCollection {
+  [CEReactions]
+           attribute unsigned long length;
+  [CEReactions, Throws]
+  setter creator void (unsigned long index, HTMLOptionElement? option);
+  [CEReactions, Throws]
+  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
+  [CEReactions, Throws]
+  void remove(long index);
+  [CEReactions, Throws]
+           attribute long selectedIndex;
+};
diff --git a/dom/webidl/HTMLOutputElement.webidl b/dom/webidl/HTMLOutputElement.webidl
new file mode 100644
index 000000000..4d65209a9
--- /dev/null
+++ b/dom/webidl/HTMLOutputElement.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-output-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-output-element
+[HTMLConstructor]
+interface HTMLOutputElement : HTMLElement {
+  [PutForwards=value, Constant]
+  readonly attribute DOMTokenList htmlFor;
+  readonly attribute HTMLFormElement? form;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+
+  [Constant]
+  readonly attribute DOMString type;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString defaultValue;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString value;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  readonly attribute NodeList labels;
+};
diff --git a/dom/webidl/HTMLParagraphElement.webidl b/dom/webidl/HTMLParagraphElement.webidl
new file mode 100644
index 000000000..289af4c9f
--- /dev/null
+++ b/dom/webidl/HTMLParagraphElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-p-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-p-element
+[HTMLConstructor]
+interface HTMLParagraphElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLParagraphElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+};
diff --git a/dom/webidl/HTMLParamElement.webidl b/dom/webidl/HTMLParamElement.webidl
new file mode 100644
index 000000000..cf6b5a35a
--- /dev/null
+++ b/dom/webidl/HTMLParamElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-param-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-param-element
+[HTMLConstructor]
+interface HTMLParamElement : HTMLElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString value;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLParamElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString type;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString valueType;
+};
diff --git a/dom/webidl/HTMLPictureElement.webidl b/dom/webidl/HTMLPictureElement.webidl
new file mode 100644
index 000000000..387eee78d
--- /dev/null
+++ b/dom/webidl/HTMLPictureElement.webidl
@@ -0,0 +1,9 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[HTMLConstructor]
+interface HTMLPictureElement : HTMLElement {
+};
diff --git a/dom/webidl/HTMLPreElement.webidl b/dom/webidl/HTMLPreElement.webidl
new file mode 100644
index 000000000..6929cd533
--- /dev/null
+++ b/dom/webidl/HTMLPreElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-pre-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-pre-element
+[HTMLConstructor]
+interface HTMLPreElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLPreElement {
+           [CEReactions, SetterThrows]
+           attribute long width;
+};
diff --git a/dom/webidl/HTMLProgressElement.webidl b/dom/webidl/HTMLProgressElement.webidl
new file mode 100644
index 000000000..564b9f2a4
--- /dev/null
+++ b/dom/webidl/HTMLProgressElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-progress-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLProgressElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute double value;
+           [CEReactions, SetterThrows]
+           attribute double max;
+  readonly attribute double position;
+  readonly attribute NodeList labels;
+};
diff --git a/dom/webidl/HTMLQuoteElement.webidl b/dom/webidl/HTMLQuoteElement.webidl
new file mode 100644
index 000000000..c999b1478
--- /dev/null
+++ b/dom/webidl/HTMLQuoteElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-blockquote-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-blockquote-element
+[HTMLConstructor]
+interface HTMLQuoteElement : HTMLElement {
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString cite;
+};
+
diff --git a/dom/webidl/HTMLScriptElement.webidl b/dom/webidl/HTMLScriptElement.webidl
new file mode 100644
index 000000000..6b48a5244
--- /dev/null
+++ b/dom/webidl/HTMLScriptElement.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-script-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ */
+
+[HTMLConstructor]
+interface HTMLScriptElement : HTMLElement {
+  [CEReactions, SetterThrows]
+  attribute DOMString src;
+  [CEReactions, SetterThrows]
+  attribute DOMString type;
+  [CEReactions, SetterThrows, Pref="dom.moduleScripts.enabled"]
+  attribute boolean noModule;
+  [CEReactions, SetterThrows]
+  attribute DOMString charset;
+  [CEReactions, SetterThrows]
+  attribute boolean async;
+  [CEReactions, SetterThrows]
+  attribute boolean defer;
+  [CEReactions, SetterThrows]
+  attribute DOMString? crossOrigin;
+  [CEReactions, SetterThrows]
+  attribute DOMString text;
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString nonce;
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString integrity;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLScriptElement {
+  [CEReactions, SetterThrows]
+  attribute DOMString event;
+  [CEReactions, SetterThrows]
+  attribute DOMString htmlFor;
+};
diff --git a/dom/webidl/HTMLSelectElement.webidl b/dom/webidl/HTMLSelectElement.webidl
new file mode 100644
index 000000000..537e9d84f
--- /dev/null
+++ b/dom/webidl/HTMLSelectElement.webidl
@@ -0,0 +1,68 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/html/#the-select-element
+ */
+
+[HTMLConstructor]
+interface HTMLSelectElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean autofocus;
+  [CEReactions, Pref="dom.forms.autocomplete.experimental", SetterThrows, Pure]
+           attribute DOMString autocomplete;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean disabled;
+  [Pure]
+  readonly attribute HTMLFormElement? form;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean multiple;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean required;
+  [CEReactions, SetterThrows, Pure]
+           attribute unsigned long size;
+
+  [Pure]
+  readonly attribute DOMString type;
+
+  [Constant]
+  readonly attribute HTMLOptionsCollection options;
+  [CEReactions, SetterThrows, Pure]
+           attribute unsigned long length;
+  getter Element? item(unsigned long index);
+  HTMLOptionElement? namedItem(DOMString name);
+  [CEReactions, Throws]
+  void add((HTMLOptionElement or HTMLOptGroupElement) element, optional (HTMLElement or long)? before = null);
+  [CEReactions]
+  void remove(long index);
+  [CEReactions, Throws]
+  setter creator void (unsigned long index, HTMLOptionElement? option);
+
+  readonly attribute HTMLCollection selectedOptions;
+  [SetterThrows, Pure]
+           attribute long selectedIndex;
+  [Pure]
+           attribute DOMString value;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  readonly attribute NodeList labels;
+
+  // https://www.w3.org/Bugs/Public/show_bug.cgi?id=20720
+  [CEReactions]
+  void remove();
+};
+
+partial interface HTMLSelectElement {
+  [ChromeOnly]
+  attribute boolean openInParentProcess;
+};
diff --git a/dom/webidl/HTMLSlotElement.webidl b/dom/webidl/HTMLSlotElement.webidl
new file mode 100644
index 000000000..9fd2da628
--- /dev/null
+++ b/dom/webidl/HTMLSlotElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/forms.html#the-dialog-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[Func="nsDocument::IsWebComponentsEnabled", Exposed=Window, HTMLConstructor]
+interface HTMLSlotElement : HTMLElement {
+  [CEReactions, SetterThrows] attribute DOMString name;
+  sequence<Node> assignedNodes(optional AssignedNodesOptions options);
+  sequence<Element> assignedElements(optional AssignedNodesOptions options);
+};
+
+dictionary AssignedNodesOptions {
+  boolean flatten = false;
+};
\ No newline at end of file
diff --git a/dom/webidl/HTMLSourceElement.webidl b/dom/webidl/HTMLSourceElement.webidl
new file mode 100644
index 000000000..55f25e469
--- /dev/null
+++ b/dom/webidl/HTMLSourceElement.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-source-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLSourceElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString src;
+           [CEReactions, SetterThrows]
+           attribute DOMString type;
+};
+
+partial interface HTMLSourceElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString srcset;
+           [CEReactions, SetterThrows]
+           attribute DOMString sizes;
+           [CEReactions, SetterThrows]
+           attribute DOMString media;
+};
diff --git a/dom/webidl/HTMLSpanElement.webidl b/dom/webidl/HTMLSpanElement.webidl
new file mode 100644
index 000000000..6f65cdfb3
--- /dev/null
+++ b/dom/webidl/HTMLSpanElement.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-span-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-span-element
+[HTMLConstructor]
+interface HTMLSpanElement : HTMLElement {};
diff --git a/dom/webidl/HTMLStyleElement.webidl b/dom/webidl/HTMLStyleElement.webidl
new file mode 100644
index 000000000..3f2e0c863
--- /dev/null
+++ b/dom/webidl/HTMLStyleElement.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-style-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ */
+
+[HTMLConstructor]
+interface HTMLStyleElement : HTMLElement {
+           [Pure]
+           attribute boolean disabled;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString media;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString nonce;
+           [CEReactions, SetterThrows, Pure]
+           attribute DOMString type;
+           [SetterThrows, Pure]
+           attribute boolean scoped;
+};
+HTMLStyleElement implements LinkStyle;
+
diff --git a/dom/webidl/HTMLTableCaptionElement.webidl b/dom/webidl/HTMLTableCaptionElement.webidl
new file mode 100644
index 000000000..48c9d354a
--- /dev/null
+++ b/dom/webidl/HTMLTableCaptionElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableCaptionElement : HTMLElement {};
+
+partial interface HTMLTableCaptionElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+};
diff --git a/dom/webidl/HTMLTableCellElement.webidl b/dom/webidl/HTMLTableCellElement.webidl
new file mode 100644
index 000000000..aff94914f
--- /dev/null
+++ b/dom/webidl/HTMLTableCellElement.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableCellElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute unsigned long colSpan;
+           [CEReactions, SetterThrows]
+           attribute unsigned long rowSpan;
+  //[PutForwards=value] readonly attribute DOMTokenList headers;
+           [CEReactions, SetterThrows]
+           attribute DOMString headers;
+  readonly attribute long cellIndex;
+
+  // Mozilla-specific extensions
+           [CEReactions, SetterThrows]
+           attribute DOMString abbr;
+           [CEReactions, SetterThrows]
+           attribute DOMString scope;
+};
+
+partial interface HTMLTableCellElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString axis;
+           [CEReactions, SetterThrows]
+           attribute DOMString height;
+           [CEReactions, SetterThrows]
+           attribute DOMString width;
+
+           [CEReactions, SetterThrows]
+           attribute DOMString ch;
+           [CEReactions, SetterThrows]
+           attribute DOMString chOff;
+           [CEReactions, SetterThrows]
+           attribute boolean noWrap;
+           [CEReactions, SetterThrows]
+           attribute DOMString vAlign;
+
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+           attribute DOMString bgColor;
+};
diff --git a/dom/webidl/HTMLTableColElement.webidl b/dom/webidl/HTMLTableColElement.webidl
new file mode 100644
index 000000000..02be4590a
--- /dev/null
+++ b/dom/webidl/HTMLTableColElement.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableColElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute unsigned long span;
+};
+
+partial interface HTMLTableColElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString ch;
+           [CEReactions, SetterThrows]
+           attribute DOMString chOff;
+           [CEReactions, SetterThrows]
+           attribute DOMString vAlign;
+           [CEReactions, SetterThrows]
+           attribute DOMString width;
+};
diff --git a/dom/webidl/HTMLTableElement.webidl b/dom/webidl/HTMLTableElement.webidl
new file mode 100644
index 000000000..f81e00041
--- /dev/null
+++ b/dom/webidl/HTMLTableElement.webidl
@@ -0,0 +1,62 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute HTMLTableCaptionElement? caption;
+  HTMLElement createCaption();
+  [CEReactions]
+  void deleteCaption();
+           [CEReactions, SetterThrows]
+           attribute HTMLTableSectionElement? tHead;
+  HTMLElement createTHead();
+  [CEReactions]
+  void deleteTHead();
+           [CEReactions, SetterThrows]
+           attribute HTMLTableSectionElement? tFoot;
+  HTMLElement createTFoot();
+  [CEReactions]
+  void deleteTFoot();
+  readonly attribute HTMLCollection tBodies;
+  HTMLElement createTBody();
+  readonly attribute HTMLCollection rows;
+  [Throws]
+  HTMLElement insertRow(optional long index = -1);
+  [CEReactions, Throws]
+  void deleteRow(long index);
+  //         attribute boolean sortable;
+  //void stopSorting();
+};
+
+partial interface HTMLTableElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString border;
+           [CEReactions, SetterThrows]
+           attribute DOMString frame;
+           [CEReactions, SetterThrows]
+           attribute DOMString rules;
+           [CEReactions, SetterThrows]
+           attribute DOMString summary;
+           [CEReactions, SetterThrows]
+           attribute DOMString width;
+
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+           attribute DOMString bgColor;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+           attribute DOMString cellPadding;
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+           attribute DOMString cellSpacing;
+};
diff --git a/dom/webidl/HTMLTableRowElement.webidl b/dom/webidl/HTMLTableRowElement.webidl
new file mode 100644
index 000000000..153d271f1
--- /dev/null
+++ b/dom/webidl/HTMLTableRowElement.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableRowElement : HTMLElement {
+  readonly attribute long rowIndex;
+  readonly attribute long sectionRowIndex;
+  readonly attribute HTMLCollection cells;
+  [CEReactions, Throws]
+  HTMLElement insertCell(optional long index = -1);
+  [Throws]
+  void deleteCell(long index);
+};
+
+partial interface HTMLTableRowElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString ch;
+           [CEReactions, SetterThrows]
+           attribute DOMString chOff;
+           [CEReactions, SetterThrows]
+           attribute DOMString vAlign;
+
+  [CEReactions, TreatNullAs=EmptyString, SetterThrows]
+           attribute DOMString bgColor;
+};
diff --git a/dom/webidl/HTMLTableSectionElement.webidl b/dom/webidl/HTMLTableSectionElement.webidl
new file mode 100644
index 000000000..a71682fc1
--- /dev/null
+++ b/dom/webidl/HTMLTableSectionElement.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLTableSectionElement : HTMLElement {
+  readonly attribute HTMLCollection rows;
+  [Throws]
+  HTMLElement insertRow(optional long index = -1);
+  [CEReactions, Throws]
+  void deleteRow(long index);
+};
+
+partial interface HTMLTableSectionElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString align;
+           [CEReactions, SetterThrows]
+           attribute DOMString ch;
+           [CEReactions, SetterThrows]
+           attribute DOMString chOff;
+           [CEReactions, SetterThrows]
+           attribute DOMString vAlign;
+};
diff --git a/dom/webidl/HTMLTemplateElement.webidl b/dom/webidl/HTMLTemplateElement.webidl
new file mode 100644
index 000000000..f77eeaa42
--- /dev/null
+++ b/dom/webidl/HTMLTemplateElement.webidl
@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/templates/index.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[HTMLConstructor]
+interface HTMLTemplateElement : HTMLElement {
+    readonly attribute DocumentFragment content;
+};
+
diff --git a/dom/webidl/HTMLTextAreaElement.webidl b/dom/webidl/HTMLTextAreaElement.webidl
new file mode 100644
index 000000000..7a181bf39
--- /dev/null
+++ b/dom/webidl/HTMLTextAreaElement.webidl
@@ -0,0 +1,100 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-textarea-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface nsIEditor;
+interface MozControllers;
+
+[HTMLConstructor]
+interface HTMLTextAreaElement : HTMLElement {
+           // attribute DOMString autocomplete;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean autofocus;
+  [CEReactions, SetterThrows, Pure]
+           attribute unsigned long cols;
+           // attribute DOMString dirName;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean disabled;
+  [Pure]
+  readonly attribute HTMLFormElement? form;
+           // attribute DOMString inputMode;
+  [CEReactions, SetterThrows, Pure]
+           attribute long maxLength;
+  [CEReactions, SetterThrows, Pure]
+           attribute long minLength;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString name;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString placeholder;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean readOnly;
+  [CEReactions, SetterThrows, Pure]
+           attribute boolean required;
+  [CEReactions, SetterThrows, Pure]
+           attribute unsigned long rows;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString wrap;
+
+  [Constant]
+  readonly attribute DOMString type;
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString defaultValue;
+  [CEReactions, TreatNullAs=EmptyString] attribute DOMString value;
+  readonly attribute unsigned long textLength;
+
+  readonly attribute boolean willValidate;
+  readonly attribute ValidityState validity;
+  readonly attribute DOMString validationMessage;
+  boolean checkValidity();
+  boolean reportValidity();
+  void setCustomValidity(DOMString error);
+
+  readonly attribute NodeList labels;
+
+  void select();
+  [Throws]
+           attribute unsigned long? selectionStart;
+  [Throws]
+           attribute unsigned long? selectionEnd;
+  [Throws]
+           attribute DOMString? selectionDirection;
+  [Throws]
+  void setRangeText(DOMString replacement);
+  [Throws]
+  void setRangeText(DOMString replacement, unsigned long start,
+    unsigned long end, optional SelectionMode selectionMode = "preserve");
+  [Throws]
+  void setSelectionRange(unsigned long start, unsigned long end, optional DOMString direction);
+};
+
+partial interface HTMLTextAreaElement {
+  // Mirrored chrome-only Mozilla extensions to nsIDOMHTMLTextAreaElement.
+  // Please make sure to update this list of nsIDOMHTMLTextAreaElement changes.
+
+  [Throws, ChromeOnly]
+  readonly attribute MozControllers controllers;
+};
+
+partial interface HTMLTextAreaElement {
+  // Mirrored chrome-only nsIDOMNSEditableElement methods.  Please make sure
+  // to update this list if nsIDOMNSEditableElement changes.
+
+  [ChromeOnly]
+  readonly attribute nsIEditor? editor;
+
+  // This is similar to set .value on nsIDOMInput/TextAreaElements, but
+  // handling of the value change is closer to the normal user input, so
+  // 'change' event for example will be dispatched when focusing out the
+  // element.
+  [ChromeOnly]
+  void setUserInput(DOMString input);
+};
diff --git a/dom/webidl/HTMLTimeElement.webidl b/dom/webidl/HTMLTimeElement.webidl
new file mode 100644
index 000000000..35c06fef3
--- /dev/null
+++ b/dom/webidl/HTMLTimeElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element
+ */
+
+[HTMLConstructor]
+interface HTMLTimeElement : HTMLElement {
+           [CEReactions, SetterThrows]
+           attribute DOMString dateTime;
+};
diff --git a/dom/webidl/HTMLTitleElement.webidl b/dom/webidl/HTMLTitleElement.webidl
new file mode 100644
index 000000000..bbce70bb2
--- /dev/null
+++ b/dom/webidl/HTMLTitleElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-title-element
+ */
+
+[HTMLConstructor]
+interface HTMLTitleElement : HTMLElement {
+           [CEReactions, Throws]
+           attribute DOMString text;
+};
diff --git a/dom/webidl/HTMLTrackElement.webidl b/dom/webidl/HTMLTrackElement.webidl
new file mode 100644
index 000000000..cbb70db2a
--- /dev/null
+++ b/dom/webidl/HTMLTrackElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-track-element
+ */
+
+[HTMLConstructor]
+interface HTMLTrackElement : HTMLElement {
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString kind;
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString src;
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString srclang;
+  [CEReactions, SetterThrows, Pure]
+  attribute DOMString label;
+  [CEReactions, SetterThrows, Pure]
+  attribute boolean default;
+
+  const unsigned short NONE = 0;
+  const unsigned short LOADING = 1;
+  const unsigned short LOADED = 2;
+  const unsigned short ERROR = 3;
+  readonly attribute unsigned short readyState;
+
+  readonly attribute TextTrack? track;
+};
diff --git a/dom/webidl/HTMLUListElement.webidl b/dom/webidl/HTMLUListElement.webidl
new file mode 100644
index 000000000..725437494
--- /dev/null
+++ b/dom/webidl/HTMLUListElement.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-ul-element
+ * http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-ul-element
+[HTMLConstructor]
+interface HTMLUListElement : HTMLElement {
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#other-elements,-attributes-and-apis
+partial interface HTMLUListElement {
+           [CEReactions, SetterThrows]
+           attribute boolean compact;
+           [CEReactions, SetterThrows]
+           attribute DOMString type;
+};
diff --git a/dom/webidl/HTMLVideoElement.webidl b/dom/webidl/HTMLVideoElement.webidl
new file mode 100644
index 000000000..5ae4c016f
--- /dev/null
+++ b/dom/webidl/HTMLVideoElement.webidl
@@ -0,0 +1,58 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-video-element
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[HTMLConstructor]
+interface HTMLVideoElement : HTMLMediaElement {
+  [CEReactions, SetterThrows]
+           attribute unsigned long width;
+  [CEReactions, SetterThrows]
+           attribute unsigned long height;
+  readonly attribute unsigned long videoWidth;
+  readonly attribute unsigned long videoHeight;
+  [CEReactions, SetterThrows]
+           attribute DOMString poster;
+};
+
+partial interface HTMLVideoElement {
+  // A count of the number of video frames that have demuxed from the media
+  // resource. If we were playing perfectly, we'd be able to paint this many
+  // frames.
+  readonly attribute unsigned long mozParsedFrames;
+
+  // A count of the number of frames that have been decoded. We may drop
+  // frames if the decode is taking too much time.
+  readonly attribute unsigned long mozDecodedFrames;
+
+  // A count of the number of frames that have been presented to the rendering
+  // pipeline. We may drop frames if they arrive late at the renderer.
+  readonly attribute unsigned long mozPresentedFrames;
+
+  // Number of presented frames which were painted on screen.
+  readonly attribute unsigned long mozPaintedFrames;
+
+  // Time which the last painted video frame was late by, in seconds.
+  readonly attribute double mozFrameDelay;
+
+  // True if the video has an audio track available.
+  readonly attribute boolean mozHasAudio;
+
+  // True if the video should use a screen wake lock.
+  [Pref="dom.wakelock.enabled", Func="Navigator::HasWakeLockSupport"]
+  attribute boolean mozUseScreenWakeLock;
+};
+
+// https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#idl-def-HTMLVideoElement
+partial interface HTMLVideoElement {
+  [Func="mozilla::dom::MediaSource::Enabled", NewObject]
+  VideoPlaybackQuality getVideoPlaybackQuality();
+};
diff --git a/dom/webidl/HashChangeEvent.webidl b/dom/webidl/HashChangeEvent.webidl
new file mode 100644
index 000000000..6e8be455c
--- /dev/null
+++ b/dom/webidl/HashChangeEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional HashChangeEventInit eventInitDict), LegacyEventInit]
+interface HashChangeEvent : Event
+{
+  readonly attribute DOMString oldURL;
+  readonly attribute DOMString newURL;
+
+  void initHashChangeEvent(DOMString typeArg,
+                           optional boolean canBubbleArg = false,
+                           optional boolean cancelableArg = false,
+                           optional DOMString oldURLArg = "",
+                           optional DOMString newURLArg = "");
+};
+
+dictionary HashChangeEventInit : EventInit
+{
+  DOMString oldURL = "";
+  DOMString newURL = "";
+};
diff --git a/dom/webidl/Headers.webidl b/dom/webidl/Headers.webidl
new file mode 100644
index 000000000..f99741501
--- /dev/null
+++ b/dom/webidl/Headers.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://fetch.spec.whatwg.org/#headers-class
+ */
+
+typedef (Headers or sequence<sequence<ByteString>> or record<ByteString, ByteString>) HeadersInit;
+
+enum HeadersGuardEnum {
+  "none",
+  "request",
+  "request-no-cors",
+  "response",
+  "immutable"
+};
+
+[Constructor(optional HeadersInit init),
+ Exposed=(Window,Worker)]
+interface Headers {
+  [Throws] void append(ByteString name, ByteString value);
+  [Throws] void delete(ByteString name);
+  [Throws] ByteString? get(ByteString name);
+  [Throws] boolean has(ByteString name);
+  [Throws] void set(ByteString name, ByteString value);
+  iterable<ByteString, ByteString>;
+
+  // Used to test different guard states from mochitest.
+  // Note: Must be set prior to populating headers or will throw.
+  [ChromeOnly, SetterThrows] attribute HeadersGuardEnum guard;
+};
diff --git a/dom/webidl/HeapSnapshot.webidl b/dom/webidl/HeapSnapshot.webidl
new file mode 100644
index 000000000..f1418dc28
--- /dev/null
+++ b/dom/webidl/HeapSnapshot.webidl
@@ -0,0 +1,105 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * A HeapSnapshot represents a snapshot of the heap graph
+ */
+[ChromeOnly, Exposed=(Window,System,Worker)]
+interface HeapSnapshot {
+  /**
+   * A time stamp of when the heap snapshot was taken, if available. Units are
+   * microseconds since midnight (00:00:00) 1 January 1970 UTC.
+   */
+  readonly attribute unsigned long long? creationTime;
+
+  /**
+   * Take a census of the heap snapshot.
+   *
+   * This is the same as |Debugger.Memory.prototype.takeCensus|, but operates on
+   * the offline heap snapshot's serialized heap graph rather than the live heap
+   * graph. The same optional configuration options that can be passed to that
+   * function can be passed here.
+   *
+   * The returned value is determined by the `"breakdown"` option used, and is
+   * usually a `Map`, `Object`, or `Array`. For example, the following breakdown
+   *
+   *     {
+   *       by: "coarseType",
+   *       objects: { by: "objectClass" },
+   *       other:   { by: "internalType" }
+   *     }
+   *
+   * produces a result like this:
+   *
+   *     {
+   *       "objects": {
+   *         "Function":         { "count": 404, "bytes": 37328 },
+   *         "Object":           { "count": 11,  "bytes": 1264 },
+   *         "Debugger":         { "count": 1,   "bytes": 416 },
+   *         "ScriptSource":     { "count": 1,   "bytes": 64 },
+   *         // ... omitted for brevity...
+   *       },
+   *       "scripts":            { "count": 1,   "bytes": 0 },
+   *       "strings":            { "count": 701, "bytes": 49080 },
+   *       "other": {
+   *         "js::Shape":        { "count": 450, "bytes": 0 },
+   *         "js::BaseShape":    { "count": 21,  "bytes": 0 },
+   *         "js::ObjectGroup":  { "count": 17,  "bytes": 0 }
+   *       }
+   *     }
+   *
+   * See the `takeCensus` section of the `js/src/doc/Debugger/Debugger.Memory.md`
+   * file for detailed documentation.
+   */
+  [Throws]
+  any takeCensus(object? options);
+
+  /**
+   * Describe `node` with the specified `breakdown`. See the comment above
+   * `takeCensus` or `js/src/doc/Debugger/Debugger.Memory.md` for detailed
+   * documentation on breakdowns.
+   *
+   * Throws an error when `node` is not the id of a node in the heap snapshot,
+   * or if the breakdown is invalid.
+   */
+  [Throws]
+  any describeNode(object breakdown, NodeId node);
+
+  /**
+   * Compute the dominator tree for this heap snapshot.
+   *
+   * @see DominatorTree.webidl
+   */
+  [Throws]
+  DominatorTree computeDominatorTree();
+
+  /**
+   * Find the shortest retaining paths from the node associated with the ID
+   * `start` to each node associated with the IDs in `targets`. Find at most
+   * `maxNumPaths` retaining paths for each target node.
+   *
+   * The return value is a Map object mapping from each target node ID to an
+   * array of retaining paths. The array may be empty if we did not find any
+   * retaining paths.
+   *
+   * A path is an array of objects of the form:
+   *
+   *     {
+   *         predecessor: <node ID>,
+   *         edge: <string or null>,
+   *     }
+   *
+   * The first `predecessor` will always be `start`. The last edge in the path
+   * leads to the `target` node that is mapped to the path; the `target` does
+   * not appear as a `predecessor` in the path.
+   *
+   * Throws when `start` or any of the elements of `targets` are not an ID of a
+   * node in the snapshot, or if we encounter an out of memory exception.
+   */
+  [Throws]
+  object computeShortestPaths(NodeId start, sequence<NodeId> targets,
+                              unsigned long long maxNumPaths);
+};
diff --git a/dom/webidl/HiddenPluginEvent.webidl b/dom/webidl/HiddenPluginEvent.webidl
new file mode 100644
index 000000000..1ba09acb6
--- /dev/null
+++ b/dom/webidl/HiddenPluginEvent.webidl
@@ -0,0 +1,12 @@
+interface PluginTag;

+

+[Constructor(DOMString type, optional HiddenPluginEventInit eventInit), ChromeOnly]

+interface HiddenPluginEvent : Event

+{

+  readonly attribute PluginTag? tag;

+};

+

+dictionary HiddenPluginEventInit : EventInit

+{

+  PluginTag? tag = null;

+};

diff --git a/dom/webidl/History.webidl b/dom/webidl/History.webidl
new file mode 100644
index 000000000..48032212a
--- /dev/null
+++ b/dom/webidl/History.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-history-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+enum ScrollRestoration { "auto", "manual" };
+
+interface History {
+  [Throws]
+  readonly attribute unsigned long length;
+  [Throws]
+  attribute ScrollRestoration scrollRestoration;
+  [Throws]
+  readonly attribute any state;
+  [Throws, UnsafeInPrerendering]
+  void go(optional long delta = 0);
+  [Throws, UnsafeInPrerendering]
+  void back();
+  [Throws, UnsafeInPrerendering]
+  void forward();
+  [Throws]
+  void pushState(any data, DOMString title, optional DOMString? url = null);
+  [Throws]
+  void replaceState(any data, DOMString title, optional DOMString? url = null);
+};
diff --git a/dom/webidl/IDBCursor.webidl b/dom/webidl/IDBCursor.webidl
new file mode 100644
index 000000000..159f9ba87
--- /dev/null
+++ b/dom/webidl/IDBCursor.webidl
@@ -0,0 +1,49 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBCursorDirection
+ */
+
+enum IDBCursorDirection {
+    "next",
+    "nextunique",
+    "prev",
+    "prevunique"
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBCursor {
+    readonly    attribute (IDBObjectStore or IDBIndex) source;
+
+    readonly    attribute IDBCursorDirection           direction;
+
+    [Throws]
+    readonly    attribute any                          key;
+
+    [Throws]
+    readonly    attribute any                          primaryKey;
+
+    [Throws]
+    IDBRequest update (any value);
+
+    [Throws]
+    void       advance ([EnforceRange] unsigned long count);
+
+    [Throws]
+    void       continue (optional any key);
+
+    [Throws]
+    void       continuePrimaryKey(any key, any primaryKey);
+
+    [Throws]
+    IDBRequest delete ();
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBCursorWithValue : IDBCursor {
+    [Throws]
+    readonly    attribute any value;
+};
diff --git a/dom/webidl/IDBDatabase.webidl b/dom/webidl/IDBDatabase.webidl
new file mode 100644
index 000000000..36fe465f3
--- /dev/null
+++ b/dom/webidl/IDBDatabase.webidl
@@ -0,0 +1,48 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBObjectStoreParameters
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,Worker,System)]
+interface IDBDatabase : EventTarget {
+    readonly    attribute DOMString          name;
+    readonly    attribute unsigned long long version;
+
+    readonly    attribute DOMStringList      objectStoreNames;
+
+    [Throws]
+    IDBObjectStore createObjectStore (DOMString name, optional IDBObjectStoreParameters optionalParameters);
+
+    [Throws]
+    void           deleteObjectStore (DOMString name);
+
+    [Throws]
+    IDBTransaction transaction ((DOMString or sequence<DOMString>) storeNames,
+                                optional IDBTransactionMode mode = "readonly");
+
+    void           close ();
+
+                attribute EventHandler       onabort;
+                attribute EventHandler       onclose;
+                attribute EventHandler       onerror;
+                attribute EventHandler       onversionchange;
+};
+
+partial interface IDBDatabase {
+    [Func="mozilla::dom::IndexedDatabaseManager::ExperimentalFeaturesEnabled"]
+    readonly    attribute StorageType        storage;
+
+    [Exposed=Window, Throws]
+    IDBRequest createMutableFile (DOMString name, optional DOMString type);
+
+    // this is deprecated due to renaming in the spec
+    [Exposed=Window, Throws]
+    IDBRequest mozCreateFileHandle (DOMString name, optional DOMString type); // now createMutableFile
+};
diff --git a/dom/webidl/IDBFactory.webidl b/dom/webidl/IDBFactory.webidl
new file mode 100644
index 000000000..2fdaf7b57
--- /dev/null
+++ b/dom/webidl/IDBFactory.webidl
@@ -0,0 +1,65 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBFactory
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface Principal;
+
+dictionary IDBOpenDBOptions
+{
+  [EnforceRange] unsigned long long version;
+  StorageType storage;
+};
+
+/**
+ * Interface that defines the indexedDB property on a window.  See
+ * http://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBFactory
+ * for more information.
+ */
+[Exposed=(Window,Worker,System)]
+interface IDBFactory {
+  [Throws]
+  IDBOpenDBRequest
+  open(DOMString name,
+       [EnforceRange] unsigned long long version);
+
+  [Throws]
+  IDBOpenDBRequest
+  open(DOMString name,
+       optional IDBOpenDBOptions options);
+
+  [Throws]
+  IDBOpenDBRequest
+  deleteDatabase(DOMString name,
+                 optional IDBOpenDBOptions options);
+
+  [Throws]
+  short
+  cmp(any first,
+      any second);
+
+  [Throws, ChromeOnly]
+  IDBOpenDBRequest
+  openForPrincipal(Principal principal,
+                   DOMString name,
+                   [EnforceRange] unsigned long long version);
+
+  [Throws, ChromeOnly]
+  IDBOpenDBRequest
+  openForPrincipal(Principal principal,
+                   DOMString name,
+                   optional IDBOpenDBOptions options);
+
+  [Throws, ChromeOnly]
+  IDBOpenDBRequest
+  deleteForPrincipal(Principal principal,
+                     DOMString name,
+                     optional IDBOpenDBOptions options);
+};
diff --git a/dom/webidl/IDBFileHandle.webidl b/dom/webidl/IDBFileHandle.webidl
new file mode 100644
index 000000000..e312742c6
--- /dev/null
+++ b/dom/webidl/IDBFileHandle.webidl
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtaone at http://mozilla.org/MPL/2.0/. */
+
+dictionary IDBFileMetadataParameters
+{
+  boolean size = true;
+  boolean lastModified = true;
+};
+
+[Exposed=(Window,System)]
+interface IDBFileHandle : EventTarget
+{
+  readonly attribute IDBMutableFile? mutableFile;
+  // this is deprecated due to renaming in the spec
+  readonly attribute IDBMutableFile? fileHandle; // now mutableFile
+  readonly attribute FileMode mode;
+  readonly attribute boolean active;
+  attribute unsigned long long? location;
+
+  [Throws]
+  IDBFileRequest? getMetadata(optional IDBFileMetadataParameters parameters);
+  [Throws]
+  IDBFileRequest? readAsArrayBuffer(unsigned long long size);
+  [Throws]
+  IDBFileRequest? readAsText(unsigned long long size,
+                             optional DOMString? encoding = null);
+
+  [Throws]
+  IDBFileRequest? write((DOMString or ArrayBuffer or ArrayBufferView or Blob) value);
+  [Throws]
+  IDBFileRequest? append((DOMString or ArrayBuffer or ArrayBufferView or Blob) value);
+  [Throws]
+  IDBFileRequest? truncate(optional unsigned long long size);
+  [Throws]
+  IDBFileRequest? flush();
+  [Throws]
+  void abort();
+
+  attribute EventHandler oncomplete;
+  attribute EventHandler onabort;
+  attribute EventHandler onerror;
+};
diff --git a/dom/webidl/IDBFileRequest.webidl b/dom/webidl/IDBFileRequest.webidl
new file mode 100644
index 000000000..c48963068
--- /dev/null
+++ b/dom/webidl/IDBFileRequest.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Exposed=(Window,System)]
+interface IDBFileRequest : DOMRequest {
+  readonly attribute IDBFileHandle? fileHandle;
+  // this is deprecated due to renaming in the spec
+  readonly attribute IDBFileHandle? lockedFile; // now fileHandle
+
+  attribute EventHandler onprogress;
+};
diff --git a/dom/webidl/IDBIndex.webidl b/dom/webidl/IDBIndex.webidl
new file mode 100644
index 000000000..0e436650a
--- /dev/null
+++ b/dom/webidl/IDBIndex.webidl
@@ -0,0 +1,71 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBIndexParameters
+ */
+
+dictionary IDBIndexParameters {
+    boolean unique = false;
+    boolean multiEntry = false;
+    // <null>:   Not locale-aware, uses normal JS sorting.
+    // <string>: Always sorted based on the rules of the specified
+    //           locale (e.g. "en-US", etc.).
+    // "auto":   Sorted by the platform default, may change based on
+    //           user agent options.
+    DOMString? locale = null;
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBIndex {
+    [SetterThrows]
+    attribute DOMString name;
+
+    readonly    attribute IDBObjectStore objectStore;
+
+    [Throws]
+    readonly    attribute any            keyPath;
+
+    readonly    attribute boolean        multiEntry;
+    readonly    attribute boolean        unique;
+
+    // <null>:   Not locale-aware, uses normal JS sorting.
+    // <string>: Sorted based on the rules of the specified locale.
+    //           Note: never returns "auto", only the current locale.
+    [Func="mozilla::dom::IndexedDatabaseManager::ExperimentalFeaturesEnabled"]
+    readonly attribute DOMString? locale;
+
+    [Func="mozilla::dom::IndexedDatabaseManager::ExperimentalFeaturesEnabled"]
+    readonly attribute boolean isAutoLocale;
+
+    [Throws]
+    IDBRequest openCursor (optional any range, optional IDBCursorDirection direction = "next");
+
+    [Throws]
+    IDBRequest openKeyCursor (optional any range, optional IDBCursorDirection direction = "next");
+
+    [Throws]
+    IDBRequest get (any key);
+
+    [Throws]
+    IDBRequest getKey (any key);
+
+    [Throws]
+    IDBRequest count (optional any key);
+};
+
+partial interface IDBIndex {
+    [Throws]
+    IDBRequest mozGetAll (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest mozGetAllKeys (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest getAll (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest getAllKeys (optional any key, [EnforceRange] optional unsigned long limit);
+};
diff --git a/dom/webidl/IDBKeyRange.webidl b/dom/webidl/IDBKeyRange.webidl
new file mode 100644
index 000000000..1caba7618
--- /dev/null
+++ b/dom/webidl/IDBKeyRange.webidl
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,Worker,System)]
+interface IDBKeyRange {
+  [Throws]
+  readonly attribute any     lower;
+  [Throws]
+  readonly attribute any     upper;
+  [Constant]
+  readonly attribute boolean lowerOpen;
+  [Constant]
+  readonly attribute boolean upperOpen;
+  [Throws]
+  boolean includes(any key);
+
+
+  [NewObject, Throws]
+  static IDBKeyRange only (any value);
+  [NewObject, Throws]
+  static IDBKeyRange lowerBound (any lower, optional boolean open = false);
+  [NewObject, Throws]
+  static IDBKeyRange upperBound (any upper, optional boolean open = false);
+  [NewObject, Throws]
+  static IDBKeyRange bound (any lower, any upper, optional boolean lowerOpen = false, optional boolean upperOpen = false);
+};
+
+[Exposed=(Window,Worker,System),
+ Func="mozilla::dom::IndexedDatabaseManager::ExperimentalFeaturesEnabled"]
+interface IDBLocaleAwareKeyRange : IDBKeyRange {
+  [NewObject, Throws]
+  static IDBLocaleAwareKeyRange bound (any lower, any upper, optional boolean lowerOpen = false, optional boolean upperOpen = false);
+};
diff --git a/dom/webidl/IDBMutableFile.webidl b/dom/webidl/IDBMutableFile.webidl
new file mode 100644
index 000000000..945a79d77
--- /dev/null
+++ b/dom/webidl/IDBMutableFile.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Exposed=(Window,System)]
+interface IDBMutableFile : EventTarget {
+  readonly attribute DOMString name;
+  readonly attribute DOMString type;
+
+  readonly attribute IDBDatabase database;
+
+  [Throws]
+  IDBFileHandle open(optional FileMode mode = "readonly");
+
+  [Throws]
+  DOMRequest getFile();
+
+  attribute EventHandler onabort;
+  attribute EventHandler onerror;
+};
diff --git a/dom/webidl/IDBObjectStore.webidl b/dom/webidl/IDBObjectStore.webidl
new file mode 100644
index 000000000..a06ac8897
--- /dev/null
+++ b/dom/webidl/IDBObjectStore.webidl
@@ -0,0 +1,74 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBObjectStore
+ */
+
+dictionary IDBObjectStoreParameters {
+    (DOMString or sequence<DOMString>)? keyPath = null;
+    boolean                             autoIncrement = false;
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBObjectStore {
+    [SetterThrows]
+    attribute DOMString name;
+
+    [Throws]
+    readonly    attribute any            keyPath;
+
+    readonly    attribute DOMStringList  indexNames;
+    readonly    attribute IDBTransaction transaction;
+    readonly    attribute boolean        autoIncrement;
+
+    [Throws]
+    IDBRequest put (any value, optional any key);
+
+    [Throws]
+    IDBRequest add (any value, optional any key);
+
+    [Throws]
+    IDBRequest delete (any key);
+
+    [Throws]
+    IDBRequest get (any key);
+
+    [Throws]
+    IDBRequest getKey (any key);
+
+    [Throws]
+    IDBRequest clear ();
+
+    [Throws]
+    IDBRequest openCursor (optional any range, optional IDBCursorDirection direction = "next");
+
+    [Throws]
+    IDBIndex   createIndex (DOMString name, (DOMString or sequence<DOMString>) keyPath, optional IDBIndexParameters optionalParameters);
+
+    [Throws]
+    IDBIndex   index (DOMString name);
+
+    [Throws]
+    void       deleteIndex (DOMString indexName);
+
+    [Throws]
+    IDBRequest count (optional any key);
+};
+
+partial interface IDBObjectStore {
+    // Success fires IDBTransactionEvent, result == array of values for given keys
+    [Throws]
+    IDBRequest mozGetAll (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest getAll (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest getAllKeys (optional any key, [EnforceRange] optional unsigned long limit);
+
+    [Throws]
+    IDBRequest openKeyCursor (optional any range, optional IDBCursorDirection direction = "next");
+};
diff --git a/dom/webidl/IDBOpenDBRequest.webidl b/dom/webidl/IDBOpenDBRequest.webidl
new file mode 100644
index 000000000..ba0ebf837
--- /dev/null
+++ b/dom/webidl/IDBOpenDBRequest.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBOpenDBRequest
+ */
+
+[Exposed=(Window,Worker,System)]
+interface IDBOpenDBRequest : IDBRequest {
+                attribute EventHandler onblocked;
+
+                attribute EventHandler onupgradeneeded;
+};
diff --git a/dom/webidl/IDBRequest.webidl b/dom/webidl/IDBRequest.webidl
new file mode 100644
index 000000000..623e6c16a
--- /dev/null
+++ b/dom/webidl/IDBRequest.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBRequest
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBRequestReadyState
+ */
+
+enum IDBRequestReadyState {
+    "pending",
+    "done"
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBRequest : EventTarget {
+    [Throws]
+    readonly    attribute any                  result;
+
+    [Throws]
+    readonly    attribute DOMError?            error;
+
+    readonly    attribute (IDBObjectStore or IDBIndex or IDBCursor)? source;
+    readonly    attribute IDBTransaction?      transaction;
+    readonly    attribute IDBRequestReadyState readyState;
+
+                attribute EventHandler         onsuccess;
+
+                attribute EventHandler         onerror;
+};
diff --git a/dom/webidl/IDBTransaction.webidl b/dom/webidl/IDBTransaction.webidl
new file mode 100644
index 000000000..44628432a
--- /dev/null
+++ b/dom/webidl/IDBTransaction.webidl
@@ -0,0 +1,44 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBTransaction
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBTransactionMode
+ */
+
+enum IDBTransactionMode {
+    "readonly",
+    "readwrite",
+    // The "readwriteflush" mode is only available when the
+    // |IndexedDatabaseManager::ExperimentalFeaturesEnabled()| function returns
+    // true. This mode is not yet part of the standard.
+    "readwriteflush",
+    "cleanup",
+    "versionchange"
+};
+
+[Exposed=(Window,Worker,System)]
+interface IDBTransaction : EventTarget {
+    [Throws]
+    readonly    attribute IDBTransactionMode mode;
+    readonly    attribute IDBDatabase        db;
+
+    readonly    attribute DOMError?          error;
+
+    [Throws]
+    IDBObjectStore objectStore (DOMString name);
+
+    [Throws]
+    void           abort();
+
+                attribute EventHandler       onabort;
+                attribute EventHandler       oncomplete;
+                attribute EventHandler       onerror;
+};
+
+// This seems to be custom
+partial interface IDBTransaction {
+    readonly    attribute DOMStringList objectStoreNames;
+};
diff --git a/dom/webidl/IDBVersionChangeEvent.webidl b/dom/webidl/IDBVersionChangeEvent.webidl
new file mode 100644
index 000000000..1c9385004
--- /dev/null
+++ b/dom/webidl/IDBVersionChangeEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#idl-def-IDBVersionChangeEvent
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary IDBVersionChangeEventInit : EventInit {
+    unsigned long long  oldVersion = 0;
+    unsigned long long? newVersion = null;
+};
+
+[Constructor(DOMString type, optional IDBVersionChangeEventInit eventInitDict),
+ Exposed=(Window,Worker,System)]
+interface IDBVersionChangeEvent : Event {
+    readonly    attribute unsigned long long  oldVersion;
+    readonly    attribute unsigned long long? newVersion;
+};
+
diff --git a/dom/webidl/IIRFilterNode.webidl b/dom/webidl/IIRFilterNode.webidl
new file mode 100644
index 000000000..a1164b6ae
--- /dev/null
+++ b/dom/webidl/IIRFilterNode.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is https://www.w3.org/TR/webaudio
+ *
+ * Copyright © 2016 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface IIRFilterNode : AudioNode {
+    void getFrequencyResponse(Float32Array frequencyHz, Float32Array magResponse, Float32Array phaseResponse);
+};
+
+// Mozilla extension
+IIRFilterNode implements AudioNodePassThrough;
diff --git a/dom/webidl/IdleDeadline.webidl b/dom/webidl/IdleDeadline.webidl
new file mode 100644
index 000000000..983c97996
--- /dev/null
+++ b/dom/webidl/IdleDeadline.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * https://w3c.github.io/requestidlecallback/
+ */
+
+[Pref="dom.requestIdleCallback.enabled"]
+interface IdleDeadline {
+  DOMHighResTimeStamp timeRemaining();
+  readonly attribute boolean didTimeout;
+};
diff --git a/dom/webidl/ImageBitmap.webidl b/dom/webidl/ImageBitmap.webidl
new file mode 100644
index 000000000..3cfabff12
--- /dev/null
+++ b/dom/webidl/ImageBitmap.webidl
@@ -0,0 +1,412 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/multipage/webappapis.html#images
+ *
+ * The origin of the extended IDL file is
+ * http://w3c.github.io/mediacapture-worker/#imagebitmap-extensions
+ */
+
+// Extensions
+// Bug 1141979 - [FoxEye] Extend ImageBitmap with interfaces to access its
+// underlying image data
+//
+// Note:
+// Our overload resolution implementation doesn't deal with a union as the
+// distinguishing argument which means we cannot overload functions via union
+// types, a.k.a. we cannot overload createImageBitmap() via ImageBitmapSource
+// and BufferSource. Here, we work around this issue by adding the BufferSource
+// into ImageBitmapSource.
+
+typedef (HTMLImageElement or
+         HTMLVideoElement or
+         HTMLCanvasElement or
+         Blob or
+         ImageData or
+         CanvasRenderingContext2D or
+         ImageBitmap or
+         BufferSource) ImageBitmapSource;
+
+[Exposed=(Window,Worker)]
+interface ImageBitmap {
+  [Constant]
+  readonly attribute unsigned long width;
+  [Constant]
+  readonly attribute unsigned long height;
+};
+
+// It's crucial that there be a way to explicitly dispose of ImageBitmaps
+// since they refer to potentially large graphics resources. Some uses
+// of this API proposal will result in repeated allocations of ImageBitmaps,
+// and garbage collection will not reliably reclaim them quickly enough.
+// Here we reuse close(), which also exists on another Transferable type,
+// MessagePort. Potentially, all Transferable types should inherit from a
+// new interface type "Closeable".
+partial interface ImageBitmap {
+  // Dispose of all graphical resources associated with this ImageBitmap.
+  void close();
+};
+
+// ImageBitmap-extensions
+// Bug 1141979 - [FoxEye] Extend ImageBitmap with interfaces to access its
+// underlying image data
+
+/*
+ * An image or a video frame is conceptually a two-dimensional array of data and
+ * each element in the array is called a pixel. The pixels are usually stored in
+ * a one-dimensional array and could be arranged in a variety of image formats.
+ * Developers need to know how the pixels are formatted so that they are able to
+ * process them.
+ *
+ * The image format describes how pixels in an image are arranged. A single
+ * pixel has at least one, but usually multiple pixel values. The range of a
+ * pixel value varies, which means different image formats use different data
+ * types to store a single pixel value.
+ *
+ * The most frequently used data type is 8-bit unsigned integer whose range is
+ * from 0 to 255, others could be 16-bit integer or 32-bit floating points and
+ * so forth. The number of pixel values of a single pixel is called the number
+ * of channels of the image format. Multiple pixel values of a pixel are used
+ * together to describe the captured property which could be color or depth
+ * information. For example, if the data is a color image in RGB color space,
+ * then it is a three-channel image format and a pixel is described by R, G and
+ * B three pixel values with range from 0 to 255. As another example, if the
+ * data is a gray image, then it is a single-channel image format with 8-bit
+ * unsigned integer data type and the pixel value describes the gray scale. For
+ * depth data, it is a single channel image format too, but the data type is
+ * 16-bit unsigned integer and the pixel value is the depth level.
+ *
+ * For those image formats whose pixels contain multiple pixel values, the pixel
+ * values might be arranged in one of the following ways:
+ * 1) Planar pixel layout:
+ *    each channel has its pixel values stored consecutively in separated
+ *    buffers (a.k.a. planes) and then all channel buffers are stored
+ *    consecutively in memory.
+ *    (Ex: RRRRRR......GGGGGG......BBBBBB......)
+ * 2) Interleaving pixel layout:
+ *    each pixel has its pixel values from all channels stored together and
+ *    interleaves all channels.
+ *    (Ex: RGBRGBRGBRGBRGB......)
+ */
+
+
+/*
+ * The ImageBitmap extensions use this enumeration to negotiate the image format
+ * while 1) accessing the underlying data of an ImageBitmap and
+ *       2) creating a new ImageBitmap.
+ *
+ * For each format in this enumeration, we use a 2x2 small image (4 pixels) as
+ * example to illustrate the pixel layout.
+ *
+ * 2x2 image:   +--------+--------+
+ *              | pixel1 | pixel2 |
+ *              +--------+--------+
+ *              | pixel3 | pixel4 |
+ *              +--------+--------+
+ *
+ */
+enum ImageBitmapFormat {
+  /*
+   * Channel order: R, G, B, A
+   * Channel size: full rgba-chennels
+   * Pixel layout: interleaving rgba-channels
+   * Pixel layout illustration:
+   *   [Plane1]: R1 G1 B1 A1 R2 G2 B2 A2 R3 G3 B3 A3 R4 G4 B4 A4
+   * Data type: 8-bit unsigned integer
+   */
+  "RGBA32",
+
+  /*
+   * Channel order: B, G, R, A
+   * Channel size: full bgra-channels
+   * Pixel layout: interleaving bgra-channels
+   * Pixel layout illustration:
+   *   [Plane1]: B1 G1 R1 A1 B2 G2 R2 A2 B3 G3 R3 A3 B4 G4 R4 A4
+   * Data type: 8-bit unsigned integer
+   */
+  "BGRA32",
+
+  /*
+   * Channel order: R, G, B
+   * Channel size: full rgb-channels
+   * Pixel layout: interleaving rgb-channels
+   * Pixel layout illustration:
+   *   [Plane1]: R1 G1 B1 R2 G2 B2 R3 G3 B3 R4 G4 B4
+   * Data type: 8-bit unsigned integer
+   */
+  "RGB24",
+
+  /*
+   * Channel order: B, G, R
+   * Channel size: full bgr-channels
+   * Pixel layout: interleaving bgr-channels
+   * Pixel layout illustration:
+   *   [Plane1]: B1 G1 R1 B2 G2 R2 B3 G3 R3 B4 G4 R4
+   * Data type: 8-bit unsigned integer
+   */
+  "BGR24",
+
+  /*
+   * Channel order: GRAY
+   * Channel size: full gray-channel
+   * Pixel layout: planar gray-channel
+   * Pixel layout illustration:
+   *   [Plane1]: GRAY1 GRAY2 GRAY3 GRAY4
+   * Data type: 8-bit unsigned integer
+   */
+  "GRAY8",
+
+  /*
+   * Channel order: Y, U, V
+   * Channel size: full yuv-channels
+   * Pixel layout: planar yuv-channels
+   * Pixel layout illustration:
+   *   [Plane1]: Y1 Y2 Y3 Y4
+   *   [Plane2]: U1 U2 U3 U4
+   *   [Plane3]: V1 V2 V3 V4
+   * Data type: 8-bit unsigned integer
+   */
+  "YUV444P",
+
+  /*
+   * Channel order: Y, U, V
+   * Channel size: full y-channel, half uv-channels
+   * Pixel layout: planar yuv-channels
+   * Pixel layout illustration:
+   *   [Plane1]: Y1 Y2 Y3 Y4
+   *   [Plane2]: U1 U3
+   *   [Plane3]: V1 V3
+   * Data type: 8-bit unsigned integer
+   */
+  "YUV422P",
+
+  /*
+   * Channel order: Y, U, V
+   * Channel size: full y-channel, quarter uv-channels
+   * Pixel layout: planar yuv-channels
+   * Pixel layout illustration:
+   *   [Plane1]: Y1 Y2 Y3 Y4
+   *   [Plane2]: U1
+   *   [Plane3]: V1
+   * Data type: 8-bit unsigned integer
+   */
+  "YUV420P",
+
+  /*
+   * Channel order: Y, U, V
+   * Channel size: full y-channel, quarter uv-channels
+   * Pixel layout: planar y-channel, interleaving uv-channels
+   * Pixel layout illustration:
+   *   [Plane1]: Y1 Y2 Y3 Y4
+   *   [Plane2]: U1 V1
+   * Data type: 8-bit unsigned integer
+   */
+  "YUV420SP_NV12",
+
+  /*
+   * Channel order: Y, V, U
+   * Channel size: full y-channel, quarter vu-channels
+   * Pixel layout: planar y-channel, interleaving vu-channels
+   * Pixel layout illustration:
+   *   [Plane1]: Y1 Y2 Y3 Y4
+   *   [Plane2]: V1 U1
+   * Data type: 8-bit unsigned integer
+   */
+  "YUV420SP_NV21",
+
+  /*
+   * Channel order: H, S, V
+   * Channel size: full hsv-channels
+   * Pixel layout: interleaving hsv-channels
+   * Pixel layout illustration:
+   *   [Plane1]: H1 S1 V1 H2 S2 V2 H3 S3 V3
+   * Data type: 32-bit floating point value
+   */
+  "HSV",
+
+  /*
+   * Channel order: l, a, b
+   * Channel size: full lab-channels
+   * Pixel layout: interleaving lab-channels
+   * Pixel layout illustration:
+   *   [Plane1]: l1 a1 b1 l2 a2 b2 l3 a3 b3
+   * Data type: 32-bit floating point value
+   */
+  "Lab",
+
+  /*
+   * Channel order: DEPTH
+   * Channel size: full depth-channel
+   * Pixel layout: planar depth-channel
+   * Pixel layout illustration:
+   *   [Plane1]: DEPTH1 DEPTH2 DEPTH3 DEPTH4
+   * Data type: 16-bit unsigned integer
+   */
+  "DEPTH",
+};
+
+enum ChannelPixelLayoutDataType {
+  "uint8",
+  "int8",
+  "uint16",
+  "int16",
+  "uint32",
+  "int32",
+  "float32",
+  "float64"
+};
+
+/*
+ * Two concepts, ImagePixelLayout and ChannelPixelLayout, together generalize
+ * the variety of pixel layouts among image formats.
+ *
+ * The ChannelPixelLayout represents the pixel layout of a single channel in a
+ * certain image format and the ImagePixelLayout is just the collection of
+ * ChannelPixelLayouts. So, the ChannelPixelLayout is defined as a dictionary
+ * type with properties to describe the layout and the ImagePixelLayout is just
+ * an alias name to a sequence of ChannelPixelLayout objects.
+ *
+ * Since an image format is composed of at least one channel, an
+ * ImagePixelLayout object contains at least one ChannelPixelLayout object.
+ *
+ * Although an image or a video frame is a two-dimensional structure, its data
+ * is usually stored in a one-dimensional array in the row-major way and the
+ * ChannelPixelLayout objects use the following properties to describe the
+ * layout of pixel values in the buffer.
+ *
+ * 1) offset:
+ *    denotes the beginning position of the channel's data relative to the
+ *    beginning position of the one-dimensional array.
+ * 2) width & height:
+ *    denote the width and height of the channel respectively. Each channel in
+ *    an image format may have different height and width.
+ * 3) data type:
+ *    denotes the format used to store one single pixel value.
+ * 4) stride:
+ *    the number of bytes between the beginning two consecutive rows in memory.
+ *    (The total bytes of each row plus the padding bytes of each raw.)
+ * 5) skip value:
+ *    the value is zero for the planar pixel layout, and a positive integer for
+ *    the interleaving pixel layout. (Describes how many bytes there are between
+ *    two adjacent pixel values in this channel.)
+ */
+
+/*
+ * Example1: RGBA image, width = 620, height = 480, stride = 2560
+ *
+ * chanel_r: offset = 0, width = 620, height = 480, data type = uint8, stride = 2560, skip = 3
+ * chanel_g: offset = 1, width = 620, height = 480, data type = uint8, stride = 2560, skip = 3
+ * chanel_b: offset = 2, width = 620, height = 480, data type = uint8, stride = 2560, skip = 3
+ * chanel_a: offset = 3, width = 620, height = 480, data type = uint8, stride = 2560, skip = 3
+ *
+ *         <---------------------------- stride ---------------------------->
+ *         <---------------------- width x 4 ---------------------->
+ * [index] 01234   8   12  16  20  24  28                           2479    2559
+ *         |||||---|---|---|---|---|---|----------------------------|-------|
+ * [data]  RGBARGBARGBARGBARGBAR___R___R...                         A%%%%%%%%
+ * [data]  RGBARGBARGBARGBARGBAR___R___R...                         A%%%%%%%%
+ * [data]  RGBARGBARGBARGBARGBAR___R___R...                         A%%%%%%%%
+ *              ^^^
+ *              r-skip
+ */
+
+/*
+ * Example2: YUV420P image, width = 620, height = 480, stride = 640
+ *
+ * chanel_y: offset = 0, width = 620, height = 480, stride = 640, skip = 0
+ * chanel_u: offset = 307200, width = 310, height = 240, data type = uint8, stride = 320, skip = 0
+ * chanel_v: offset = 384000, width = 310, height = 240, data type = uint8, stride = 320, skip = 0
+ *
+ *         <--------------------------- y-stride --------------------------->
+ *         <----------------------- y-width ----------------------->
+ * [index] 012345                                                  619      639
+ *         ||||||--------------------------------------------------|--------|
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                        Y%%%%%%%%%
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                        Y%%%%%%%%%
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                        Y%%%%%%%%%
+ * [data]  ......
+ *         <-------- u-stride ---------->
+ *         <----- u-width ----->
+ * [index] 307200              307509   307519
+ *         |-------------------|--------|
+ * [data]  UUUUUUUUUU...       U%%%%%%%%%
+ * [data]  UUUUUUUUUU...       U%%%%%%%%%
+ * [data]  UUUUUUUUUU...       U%%%%%%%%%
+ * [data]  ......
+ *         <-------- v-stride ---------->
+ *         <- --- v-width ----->
+ * [index] 384000              384309   384319
+ *         |-------------------|--------|
+ * [data]  VVVVVVVVVV...       V%%%%%%%%%
+ * [data]  VVVVVVVVVV...       V%%%%%%%%%
+ * [data]  VVVVVVVVVV...       V%%%%%%%%%
+ * [data]  ......
+ */
+
+/*
+ * Example3: YUV420SP_NV12 image, width = 620, height = 480, stride = 640
+ *
+ * chanel_y: offset = 0, width = 620, height = 480, stride = 640, skip = 0
+ * chanel_u: offset = 307200, width = 310, height = 240, data type = uint8, stride = 640, skip = 1
+ * chanel_v: offset = 307201, width = 310, height = 240, data type = uint8, stride = 640, skip = 1
+ *
+ *         <--------------------------- y-stride -------------------------->
+ *         <----------------------- y-width ---------------------->
+ * [index] 012345                                                 619      639
+ *         ||||||-------------------------------------------------|--------|
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                       Y%%%%%%%%%
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                       Y%%%%%%%%%
+ * [data]  YYYYYYYYYYYYYYYYYYYYYYYYYYYYY...                       Y%%%%%%%%%
+ * [data]  ......
+ *         <--------------------- u-stride / v-stride -------------------->
+ *         <------------------ u-width + v-width ----------------->
+ * [index] 307200(u-offset)                                       307819  307839
+ *         |------------------------------------------------------|-------|
+ * [index] |307201(v-offset)                                      |307820 |
+ *         ||-----------------------------------------------------||------|
+ * [data]  UVUVUVUVUVUVUVUVUVUVUVUVUVUVUV...                      UV%%%%%%%
+ * [data]  UVUVUVUVUVUVUVUVUVUVUVUVUVUVUV...                      UV%%%%%%%
+ * [data]  UVUVUVUVUVUVUVUVUVUVUVUVUVUVUV...                      UV%%%%%%%
+ *          ^            ^
+ *         u-skip        v-skip
+ */
+
+/*
+ * Example4: DEPTH image, width = 640, height = 480, stride = 1280
+ *
+ * chanel_d: offset = 0, width = 640, height = 480, data type = uint16, stride = 1280, skip = 0
+ *
+ * note: each DEPTH value uses two bytes
+ *
+ *         <----------------------- d-stride ---------------------->
+ *         <----------------------- d-width ----------------------->
+ * [index] 02468                                                   1278
+ *         |||||---------------------------------------------------|
+ * [data]  DDDDDDDDDDDDDDDDDDDDDDDDDDDDD...                        D
+ * [data]  DDDDDDDDDDDDDDDDDDDDDDDDDDDDD...                        D
+ * [data]  DDDDDDDDDDDDDDDDDDDDDDDDDDDDD...                        D
+ * [data]  ......
+ */
+
+dictionary ChannelPixelLayout {
+    required unsigned long              offset;
+    required unsigned long              width;
+    required unsigned long              height;
+    required ChannelPixelLayoutDataType dataType;
+    required unsigned long              stride;
+    required unsigned long              skip;
+};
+
+typedef sequence<ChannelPixelLayout> ImagePixelLayout;
+
+partial interface ImageBitmap {
+    [Throws, Func="mozilla::dom::ImageBitmap::ExtensionsEnabled"]
+    ImageBitmapFormat               findOptimalFormat (optional sequence<ImageBitmapFormat> aPossibleFormats);
+    [Throws, Func="mozilla::dom::ImageBitmap::ExtensionsEnabled"]
+    long                            mappedDataLength (ImageBitmapFormat aFormat);
+    [Throws, Func="mozilla::dom::ImageBitmap::ExtensionsEnabled"]
+    Promise<ImagePixelLayout> mapDataInto (ImageBitmapFormat aFormat, BufferSource aBuffer, long aOffset);
+};
diff --git a/dom/webidl/ImageBitmapRenderingContext.webidl b/dom/webidl/ImageBitmapRenderingContext.webidl
new file mode 100644
index 000000000..b94447cd9
--- /dev/null
+++ b/dom/webidl/ImageBitmapRenderingContext.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://wiki.whatwg.org/wiki/OffscreenCanvas
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+// The new ImageBitmapRenderingContext is a canvas rendering context
+// which only provides the functionality to replace the canvas's
+// contents with the given ImageBitmap. Its context id (the first argument
+// to getContext) is "bitmaprenderer".
+[Exposed=(Window,Worker)]
+interface ImageBitmapRenderingContext {
+  // Displays the given ImageBitmap in the canvas associated with this
+  // rendering context. Ownership of the ImageBitmap is transferred to
+  // the canvas. The caller may not use its reference to the ImageBitmap
+  // after making this call. (This semantic is crucial to enable prompt
+  // reclamation of expensive graphics resources, rather than relying on
+  // garbage collection to do so.)
+  //
+  // The ImageBitmap conceptually replaces the canvas's bitmap, but
+  // it does not change the canvas's intrinsic width or height.
+  //
+  // The ImageBitmap, when displayed, is clipped to the rectangle
+  // defined by the canvas's instrinsic width and height. Pixels that
+  // would be covered by the canvas's bitmap which are not covered by
+  // the supplied ImageBitmap are rendered transparent black. Any CSS
+  // styles affecting the display of the canvas are applied as usual.
+  void transferFromImageBitmap(ImageBitmap bitmap);
+
+  // Deprecated version of transferFromImageBitmap
+  [Deprecated="ImageBitmapRenderingContext_TransferImageBitmap"]
+  void transferImageBitmap(ImageBitmap bitmap);
+};
diff --git a/dom/webidl/ImageCapture.webidl b/dom/webidl/ImageCapture.webidl
new file mode 100644
index 000000000..22f330335
--- /dev/null
+++ b/dom/webidl/ImageCapture.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/ImageCapture.html
+ *
+ * Copyright © 2012-2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.imagecapture.enabled", Constructor(VideoStreamTrack track)]
+interface ImageCapture : EventTarget {
+  // readonly attribute PhotoSettingsOptions photoSettingsOptions;
+  readonly attribute VideoStreamTrack videoStreamTrack;
+  attribute EventHandler onphoto;
+  attribute EventHandler onerror;
+  // attribute EventHandler onphotosettingschange;
+  // attribute EventHandler onframegrab;
+
+  // [Throws]
+  // void setOptions (PhotoSettings? photoSettings);
+  [Throws]
+  void takePhoto();
+  // [Throws]
+  // void getFrame();
+};
diff --git a/dom/webidl/ImageCaptureErrorEvent.webidl b/dom/webidl/ImageCaptureErrorEvent.webidl
new file mode 100644
index 000000000..b7300aa30
--- /dev/null
+++ b/dom/webidl/ImageCaptureErrorEvent.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/ImageCapture.html
+ *
+ * Copyright © 2012-2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.imagecapture.enabled",
+Constructor(DOMString type, optional ImageCaptureErrorEventInit imageCaptureErrorInitDict)]
+interface ImageCaptureErrorEvent : Event {
+  readonly attribute ImageCaptureError? imageCaptureError;
+};
+
+dictionary ImageCaptureErrorEventInit : EventInit {
+  ImageCaptureError? imageCaptureError = null;
+};
+
+[NoInterfaceObject]
+interface ImageCaptureError {
+  const unsigned short FRAME_GRAB_ERROR = 1;
+  const unsigned short SETTINGS_ERROR = 2;
+  const unsigned short PHOTO_ERROR = 3;
+  const unsigned short ERROR_UNKNOWN = 4;
+  readonly attribute unsigned short code;
+  readonly attribute DOMString message;
+};
+
diff --git a/dom/webidl/ImageData.webidl b/dom/webidl/ImageData.webidl
new file mode 100644
index 000000000..f6000bd05
--- /dev/null
+++ b/dom/webidl/ImageData.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#imagedata
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of this document.
+ */
+
+[Constructor(unsigned long sw, unsigned long sh),
+ Constructor(Uint8ClampedArray data, unsigned long sw, optional unsigned long sh),
+ Exposed=(Window,Worker)]
+interface ImageData {
+ [Constant]
+ readonly attribute unsigned long width;
+ [Constant]
+ readonly attribute unsigned long height;
+ [Constant, StoreInSlot]
+ readonly attribute Uint8ClampedArray data;
+};
diff --git a/dom/webidl/ImageDocument.webidl b/dom/webidl/ImageDocument.webidl
new file mode 100644
index 000000000..571e345dd
--- /dev/null
+++ b/dom/webidl/ImageDocument.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * dom/html/public/nsIImageDocument.idl
+ */
+
+interface imgIRequest;
+
+[ChromeOnly, OverrideBuiltins]
+interface ImageDocument : HTMLDocument {
+  /* Whether the image is overflowing visible area. */
+  readonly attribute boolean imageIsOverflowing;
+
+  /* Whether the image has been resized to fit visible area. */
+  readonly attribute boolean imageIsResized;
+
+  /* The image request being displayed in the content area */
+  [Throws]
+  readonly attribute imgIRequest? imageRequest;
+
+  /* Resize the image to fit visible area. */
+  void shrinkToFit();
+
+  /* Restore image original size. */
+  void restoreImage();
+
+  /* Restore the image, trying to keep a certain pixel in the same position.
+   * The coordinate system is that of the shrunken image.
+   */
+  void restoreImageTo(long x, long y);
+
+  /* A helper method for switching between states.
+   * The switching logic is as follows. If the image has been resized
+   * restore image original size, otherwise if the image is overflowing
+   * current visible area resize the image to fit the area.
+   */
+  void toggleImageSize();
+};
diff --git a/dom/webidl/InputEvent.webidl b/dom/webidl/InputEvent.webidl
new file mode 100644
index 000000000..805b0510c
--- /dev/null
+++ b/dom/webidl/InputEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional InputEventInit eventInitDict)]
+interface InputEvent : UIEvent
+{
+  readonly attribute boolean       isComposing;
+};
+
+dictionary InputEventInit : UIEventInit
+{
+  boolean isComposing = false;
+};
diff --git a/dom/webidl/InputMethod.webidl b/dom/webidl/InputMethod.webidl
new file mode 100644
index 000000000..ca22dcc1b
--- /dev/null
+++ b/dom/webidl/InputMethod.webidl
@@ -0,0 +1,738 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * InputMethod API implements a bridge between the web content hosting an input
+ * element and the input content (a.k.a. input app, virtual keyboard app,
+ * or IME). This API is input content facing in order for it to interact with
+ * the remote input element.
+ * The API also contains a few Gaia System app only methods
+ * (marked with "input-manage" permission) for Gaia System app to interact with
+ * some types of inputs and to regulate the input apps.
+ */
+[JSImplementation="@mozilla.org/b2g-inputmethod;1",
+ NavigatorProperty="mozInputMethod",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputMethod : EventTarget {
+  /**
+   * Activate or decactive current API instance.
+   * Gaia System app call this method via BrowserElement#setInputMethodActive.
+   */
+  [ChromeOnly]
+  void setActive(boolean isActive);
+
+  /**
+   * InputMethodManager contain a few global methods expose to input apps.
+   */
+  readonly attribute MozInputMethodManager mgmt;
+
+  /**
+   * Fired when the input context changes, include changes from and to null.
+   * The new InputContext instance will be available in the event
+   * object under |inputcontext| property.  When it changes to null it
+   * means the app (the user of this API) no longer has the control of
+   * the original focused input field.
+   * Note that if the app saves the original context, it might get
+   * void; implementation decides when to void the input context.
+   */
+  attribute EventHandler oninputcontextchange;
+
+  /**
+   * An "input context" is mapped to a text field that the app is
+   * allow to mutate. This attribute should be null when there is no
+   * text field currently focused.
+   */
+  readonly attribute MozInputContext? inputcontext;
+
+  /**
+   * Add a dynamically declared input.
+   *
+   * The id must not be the same with any statically declared input in the app
+   * manifest. If an input of the same id is already declared, the info of that
+   * input will be updated.
+   */
+  Promise<void> addInput(DOMString inputId,
+                         MozInputMethodInputManifest inputManifest);
+
+  /**
+   * Remove a dynamically declared input.
+   *
+   * The id must not be the same with any statically declared input in the app
+   * manifest. Silently resolves if the input is not previously declared;
+   * rejects if attempt to remove a statically declared input.
+   */
+  Promise<void> removeInput(DOMString id);
+
+  /**
+   * Remove focus from the current input, usable by Gaia System app, globally,
+   * regardless of the current focus state.
+   */
+  void removeFocus();
+
+  /**
+   * The following are internal methods for Firefox OS System app only,
+   * for handling the "option" group inputs.
+   */
+
+  /**
+   * Set the value on the currently focused element. This has to be used
+   * for special situations where the value had to be chosen amongst a
+   * list (type=month) or a widget (type=date, time, etc.).
+   * If the value passed in parameter isn't valid (in the term of HTML5
+   * Forms Validation), the value will simply be ignored by the element.
+   */
+  void setValue(DOMString value);
+
+  /**
+   * Select the <select> option specified by index.
+   * If this method is called on a <select> that support multiple
+   * selection, then the option specified by index will be added to
+   * the selection.
+   * If this method is called for a select that does not support multiple
+   * selection the previous element will be unselected.
+   */
+  void setSelectedOption(long index);
+
+  /**
+   * Select the <select> options specified by indexes. All other options
+   * will be deselected.
+   * If this method is called for a <select> that does not support multiple
+   * selection, then the last index specified in indexes will be selected.
+   */
+  void setSelectedOptions(sequence<long> indexes);
+};
+
+/**
+ * InputMethodManager contains a few of the global methods for the input app.
+ */
+[JSImplementation="@mozilla.org/b2g-imm;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputMethodManager : EventTarget {
+  /**
+   * Ask the OS to show a list of available inputs for users to switch from.
+   * OS should sliently ignore this request if the app is currently not the
+   * active one.
+   */
+  void showAll();
+
+  /**
+   * Ask the OS to switch away from the current active input app.
+   * OS should sliently ignore this request if the app is currently not the
+   * active one.
+   */
+  void next();
+
+  /**
+   * If this method returns true, it is recommended that the input app provides
+   * a shortcut that would invoke the next() method above, for easy switching
+   * between inputs -- i.e. show a "global" button on screen if the input app
+   * implements an on-screen virtual keyboard.
+   *
+   * The returning value is depend on the inputType of the current input context.
+   */
+  boolean supportsSwitching();
+
+  /**
+   * Ask the OS to remove the input focus, will cause the lost of input context.
+   * OS should sliently ignore this request if the app is currently not the
+   * active one.
+   */
+  void hide();
+
+  /**
+   * Update Gecko with information on the input types which supportsSwitching()
+   * should return ture.
+   *
+   * @param types Array of input types in which supportsSwitching() should
+   *              return true.
+   */
+  void setSupportsSwitchingTypes(sequence<MozInputMethodInputContextInputTypes> types);
+
+  /**
+   * CustomEvent dispatches to System when there is an input to handle.
+   * If the API consumer failed to handle and call preventDefault(),
+   * there will be a message printed on the console.
+   *
+   * evt.detail is defined by MozInputContextFocusEventDetail.
+   */
+  attribute EventHandler oninputcontextfocus;
+
+  /**
+   * Event dispatches to System when there is no longer an input to handle.
+   * If the API consumer failed to handle and call preventDefault(),
+   * there will be a message printed on the console.
+   */
+  attribute EventHandler oninputcontextblur;
+
+  /**
+   * Event dispatches to System when there is a showAll() call.
+   * If the API consumer failed to handle and call preventDefault(),
+   * there will be a message printed on the console.
+   */
+  attribute EventHandler onshowallrequest;
+
+  /**
+   * Event dispatches to System when there is a next() call.
+   * If the API consumer failed to handle and call preventDefault(),
+   * there will be a message printed on the console.
+   */
+  attribute EventHandler onnextrequest;
+
+  /**
+   * Event dispatches to System when there is a addInput() call.
+   * The API consumer must call preventDefault() to indicate the event is
+   * consumed, otherwise the request is not considered handled even if
+   * waitUntil() was called.
+   *
+   * evt.detail is defined by MozInputRegistryEventDetail.
+   */
+  attribute EventHandler onaddinputrequest;
+
+  /**
+   * Event dispatches to System when there is a removeInput() call.
+   * The API consumer must call preventDefault() to indicate the event is
+   * consumed, otherwise the request is not considered handled even if
+   * waitUntil() was called.
+   *
+   * evt.detail is defined by MozInputRegistryEventDetail.
+   */
+  attribute EventHandler onremoveinputrequest;
+};
+
+/**
+ * Detail of the inputcontextfocus event.
+ */
+[JSImplementation="@mozilla.org/b2g-imm-focus;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputContextFocusEventDetail {
+  /**
+   * The type of the focused input.
+   */
+  readonly attribute MozInputMethodInputContextTypes type;
+  /**
+   * The input type of the focused input.
+   */
+  readonly attribute MozInputMethodInputContextInputTypes inputType;
+
+  /**
+   * The following is only needed for rendering and handling "option" input types,
+   * in System app.
+   */
+
+  /**
+   * Current value of the input.
+   */
+  readonly attribute DOMString? value;
+  /**
+   * An object representing all the <optgroup> and <option> elements
+   * in the <select> element.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute MozInputContextChoicesInfo? choices;
+  /**
+   * Max/min value of <input>
+   */
+  readonly attribute DOMString? min;
+  readonly attribute DOMString? max;
+};
+
+/**
+ * Information about the options within the <select> element.
+ */
+dictionary MozInputContextChoicesInfo {
+  boolean multiple;
+  sequence<MozInputMethodChoiceDict> choices;
+};
+
+/**
+ * Content of the option header (<optgroup>) or an option (<option>).
+ */
+dictionary MozInputMethodChoiceDict {
+  boolean group;
+  DOMString text;
+  boolean disabled;
+  boolean? inGroup;
+  boolean? selected;
+  long? optionIndex;
+};
+
+/**
+ * detail of addinputrequest or removeinputrequest event.
+ */
+[JSImplementation="@mozilla.org/b2g-imm-input-registry;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputRegistryEventDetail {
+  /**
+   * Manifest URL of the requesting app.
+   */
+  readonly attribute DOMString manifestURL;
+  /**
+   * ID of the input
+   */
+  readonly attribute DOMString inputId;
+  /**
+   * Input manifest of the input to add.
+   * Null for removeinputrequest event.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute MozInputMethodInputManifest? inputManifest;
+  /**
+   * Resolve or Reject the addInput() or removeInput() call when the passed
+   * promises are resolved.
+   */
+  [Throws]
+  void waitUntil(Promise<any> p);
+};
+
+/**
+ * The input context, which consists of attributes and information of current
+ * input field. It also hosts the methods available to the keyboard app to
+ * mutate the input field represented. An "input context" gets void when the
+ * app is no longer allowed to interact with the text field,
+ * e.g., the text field does no longer exist, the app is being switched to
+ * background, and etc.
+ */
+[JSImplementation="@mozilla.org/b2g-inputcontext;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputContext: EventTarget {
+  /**
+   * Type of the InputContext. See MozInputMethodInputContextTypes
+   */
+  readonly attribute MozInputMethodInputContextTypes? type;
+
+  /**
+   * InputType of the InputContext. See MozInputMethodInputContextInputTypes.
+   */
+  readonly attribute MozInputMethodInputContextInputTypes? inputType;
+
+  /**
+   * The inputmode string, representing the inputmode of the input.
+   * See http://www.whatwg.org/specs/web-apps/current-work/multipage/association-of-controls-and-forms.html#input-modalities:-the-inputmode-attribute
+   */
+  readonly attribute DOMString? inputMode;
+
+  /**
+   * The primary language for the input field.
+   * It is the value of HTMLElement.lang.
+   * See http://www.whatwg.org/specs/web-apps/current-work/multipage/elements.html#htmlelement
+   */
+  readonly attribute DOMString? lang;
+
+  /**
+   * Get the whole text content of the input field.
+   * @return DOMString
+   */
+  Promise<DOMString> getText(optional long offset, optional long length);
+
+  /**
+   * The start and stop position of the current selection.
+   */
+  readonly attribute long selectionStart;
+  readonly attribute long selectionEnd;
+
+  /**
+   * The text in the current input.
+   */
+  readonly attribute DOMString? text;
+
+  /**
+   * The text before and after the begining of the selected text.
+   *
+   * You should use the text property instead because these properties are
+   * truncated at 100 characters.
+   */
+  readonly attribute DOMString? textBeforeCursor;
+  readonly attribute DOMString? textAfterCursor;
+
+  /**
+   * Set the selection range of the the editable text.
+   * Note: This method cannot be used to move the cursor during composition. Calling this
+   * method will cancel composition.
+   * @param start The beginning of the selected text.
+   * @param length The length of the selected text.
+   *
+   * Note that the start position should be less or equal to the end position.
+   * To move the cursor, set the start and end position to the same value.
+   *
+   * @return boolean
+   */
+  Promise<boolean> setSelectionRange(long start, long length);
+
+  /* User moves the cursor, or changes the selection with other means. If the text around
+   * cursor has changed, but the cursor has not been moved, the IME won't get notification.
+   *
+   * evt.detail is defined by MozInputContextSelectionChangeEventDetail.
+   */
+  attribute EventHandler onselectionchange;
+
+  /**
+   * Commit text to current input field and replace text around
+   * cursor position. It will clear the current composition.
+   *
+   * @param text The string to be replaced with.
+   * @param offset The offset from the cursor position where replacing starts. Defaults to 0.
+   * @param length The length of text to replace. Defaults to 0.
+   * @return boolean
+   */
+  Promise<boolean> replaceSurroundingText(DOMString text, optional long offset, optional long length);
+
+  /**
+   * Delete text around the cursor.
+   * @param offset The offset from the cursor position where deletion starts.
+   * @param length The length of text to delete.
+   * TODO: maybe updateSurroundingText(DOMString beforeText, DOMString afterText); ?
+   * @return boolean
+   */
+  Promise<boolean> deleteSurroundingText(long offset, long length);
+
+  /**
+   * Notifies when the text around the cursor is changed, due to either text
+   * editing or cursor movement. If the cursor has been moved, but the text around has not
+   * changed, the IME won't get notification.
+   *
+   * evt.detail is defined by MozInputContextSurroundingTextChangeEventDetail.
+   */
+  attribute EventHandler onsurroundingtextchange;
+
+  /**
+   * Send a string/character with its key events. There are two ways of invocating
+   * the method for backward compability purpose.
+   *
+   * (1) The recommended way, allow specifying DOM level 3 properties like |code|.
+   * @param dictOrKeyCode See MozInputMethodKeyboardEventDict.
+   * @param charCode disregarded
+   * @param modifiers disregarded
+   * @param repeat disregarded
+   *
+   * (2) Deprecated, reserved for backward compability.
+   * @param dictOrKeyCode keyCode of the key to send, should be one of the DOM_VK_ value in KeyboardEvent.
+   * @param charCode charCode of the character, should be 0 for non-printable keys.
+   * @param modifiers this paramater is no longer honored.
+   * @param repeat indicates whether a key would be sent repeatedly.
+   *
+   * @return A promise. Resolve to true if succeeds.
+   *                    Rejects to a string indicating the error.
+   *
+   * Note that, if you want to send a key n times repeatedly, make sure set
+   * parameter repeat to true and invoke sendKey n times, and invoke keyup
+   * after the end of the input.
+   */
+  Promise<boolean> sendKey((MozInputMethodRequiredKeyboardEventDict or long) dictOrKeyCode,
+                           optional long charCode,
+                           optional long modifiers,
+                           optional boolean repeat);
+
+  /**
+   * Send a string/character with keydown, and keypress events.
+   * keyup should be called afterwards to ensure properly sequence.
+   *
+   * @param dict See MozInputMethodKeyboardEventDict.
+   *
+   * @return A promise. Resolve to true if succeeds.
+   *                    Rejects to a string indicating the error.
+   */
+  Promise<boolean> keydown(MozInputMethodRequiredKeyboardEventDict dict);
+
+  /**
+   * Send a keyup event. keydown should be called first to ensure properly sequence.
+   *
+   * @param dict See MozInputMethodKeyboardEventDict.
+   *
+   * @return A promise. Resolve to true if succeeds.
+   *                    Rejects to a string indicating the error.
+   */
+  Promise<boolean> keyup(MozInputMethodRequiredKeyboardEventDict dict);
+
+  /**
+   * Set current composing text. This method will start composition or update
+   * composition if it has started. The composition will be started right
+   * before the cursor position and any selected text will be replaced by the
+   * composing text. When the composition is started, calling this method can
+   * update the text and move cursor winthin the range of the composing text.
+   * @param text The new composition text to show.
+   * @param cursor The new cursor position relative to the start of the
+   * composition text. The cursor should be positioned within the composition
+   * text. This means the value should be >= 0 and <= the length of
+   * composition text. Defaults to the lenght of composition text, i.e., the
+   * cursor will be positioned after the composition text.
+   * @param clauses The array of composition clause information. If not set,
+   * only one clause is supported.
+   * @param dict The properties of the keyboard event that cause the composition
+   * to set. keydown or keyup event will be fired if it's necessary.
+   * For compatibility, we recommend that you should always set this argument
+   * if it's caused by a key operation.
+   *
+   * The composing text, which is shown with underlined style to distinguish
+   * from the existing text, is used to compose non-ASCII characters from
+   * keystrokes, e.g. Pinyin or Hiragana. The composing text is the
+   * intermediate text to help input complex character and is not committed to
+   * current input field. Therefore if any text operation other than
+   * composition is performed, the composition will automatically end. Same
+   * apply when the inputContext is lost during an unfinished composition
+   * session.
+   *
+   * To finish composition and commit text to current input field, an IME
+   * should call |endComposition|.
+   */
+  Promise<boolean> setComposition(DOMString text,
+                                  optional long cursor,
+                                  optional sequence<CompositionClauseParameters> clauses,
+                                  optional MozInputMethodKeyboardEventDict dict);
+
+  /**
+   * End composition, clear the composing text and commit given text to
+   * current input field. The text will be committed before the cursor
+   * position.
+   * @param text The text to commited before cursor position. If empty string
+   * is given, no text will be committed.
+   * @param dict The properties of the keyboard event that cause the composition
+   * to end. keydown or keyup event will be fired if it's necessary.
+   * For compatibility, we recommend that you should always set this argument
+   * if it's caused by a key operation.
+   *
+   * Note that composition always ends automatically with nothing to commit if
+   * the composition does not explicitly end by calling |endComposition|, but
+   * is interrupted by |sendKey|, |setSelectionRange|,
+   * |replaceSurroundingText|, |deleteSurroundingText|, user moving the
+   * cursor, changing the focus, etc.
+   */
+  Promise<boolean> endComposition(optional DOMString text,
+                                  optional MozInputMethodKeyboardEventDict dict);
+
+  /**
+   * The interface used to receive the native events from hardware keyboard
+   */
+  readonly attribute MozHardwareInput? hardwareinput;
+};
+
+/*
+ * This interface will be added into inputcontext and used to receive the
+ * events from the hardware keyboard.
+ * Example:
+ *   mozInputMethod.inputcontext.hardwareinput.addEventListener('keyup', this);
+ *   mozInputMethod.inputcontext.hardwareinput.removeEventListener('keyup', this);
+ */
+[JSImplementation="@mozilla.org/b2g-hardwareinput;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozHardwareInput: EventTarget {
+};
+
+/**
+ * Detail of the selectionchange event.
+ */
+[JSImplementation="@mozilla.org/b2g-imm-selectionchange;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputContextSelectionChangeEventDetail {
+  /**
+   * Indicate whether or not the change is due to our own action from,
+   * for example, sendKey() call.
+   *
+   * Note: this property is untrustworthy because it would still be true even
+   * if script in the page changed the text synchronously upon responding to
+   * events trigger by the call.
+   */
+  readonly attribute boolean ownAction;
+
+  /**
+   * The start and stop position of the current selection.
+   */
+  readonly attribute long selectionStart;
+  readonly attribute long selectionEnd;
+};
+
+/**
+ * Detail of the surroundingtextchange event.
+ */
+[JSImplementation="@mozilla.org/b2g-imm-surroundingtextchange;1",
+ Pref="dom.mozInputMethod.enabled",
+ ChromeOnly]
+interface MozInputContextSurroundingTextChangeEventDetail {
+  /**
+   * Indicate whether or not the change is due to our own action from,
+   * for example, sendKey() call.
+   *
+   * Note: this property is untrustworthy because it would still be true even
+   * if script in the page changed the text synchronously upon responding to
+   * events trigger by the call.
+   */
+  readonly attribute boolean ownAction;
+
+  /**
+   * The text in the current input.
+   */
+  readonly attribute DOMString? text;
+
+  /**
+   * The text before and after the begining of the selected text.
+   *
+   * You should use the text property instead because these properties are
+   * truncated at 100 characters.
+   */
+  readonly attribute DOMString? textBeforeCursor;
+  readonly attribute DOMString? textAfterCursor;
+};
+
+enum CompositionClauseSelectionType {
+  "raw-input",
+  "selected-raw-text",
+  "converted-text",
+  "selected-converted-text"
+};
+
+dictionary CompositionClauseParameters {
+  CompositionClauseSelectionType selectionType = "raw-input";
+  long length;
+};
+
+/**
+ * Types are HTML tag names of the inputs that is explosed with InputContext,
+ * *and* the special keyword "contenteditable" for contenteditable element.
+ */
+enum MozInputMethodInputContextTypes {
+  "input", "textarea", "contenteditable",
+  /**
+   * <select> is managed by the API but it is handled by the System app only,
+   * so this value is only accessible by System app from inputcontextfocus event.
+   */
+  "select"
+};
+
+/**
+ * InputTypes of the input that InputContext is representing. The value
+ * is inferred from the type attribute of element.
+ *
+ * See https://html.spec.whatwg.org/multipage/forms.html#states-of-the-type-attribute
+ * for types of HTMLInputElement.
+ *
+ * They are divided into groups -- an layout/input capable of handling one type
+ * in the group is considered as capable of handling all of the types in the
+ * same group.
+ * The layout/input that could handle type "text" is considered as the fallback
+ * if none of layout/input installed can handle a specific type.
+ *
+ * Groups and fallbacks is enforced in Gaia System app currently.
+ *
+ * Noted that the actual virtual keyboard to show, for example in the case of
+ * Gaia Keyboard app, will also depend on the inputMode of the input element.
+ */
+enum MozInputMethodInputContextInputTypes {
+  /**
+   * Group "text". Be reminded that contenteditable element is assigned with
+   * an input type of "textarea".
+   */
+  "text", "search", "textarea",
+  /**
+   * Group "number"
+   */
+  "number", "tel",
+  /**
+   * Group "url"
+   */
+  "url",
+  /**
+   * Group "email"
+   */
+  "email",
+  /**
+   * Group "password".
+   * An non-Latin alphabet layout/input should not be able to handle this type.
+   */
+  "password",
+  /**
+   * Group "option". These types are handled by System app itself currently, so
+   * no input app will be set to active for these input types.
+   * System app access these types from inputcontextfocus event.
+   * ("select-one" and "select-multiple" are valid HTMLSelectElement#type.)
+   */
+  "datetime", "date", "month", "week", "time", "datetime-local", "color",
+  "select-one", "select-multiple"
+  /**
+   * These types are ignored by the API even though they are valid
+   * HTMLInputElement#type.
+   */
+  //"checkbox", "radio", "file", "submit", "image", "range", "reset", "button"
+};
+
+/**
+ * An input app can host multiple inputs (a.k.a. layouts) and the capability of
+ * the input is described by the input manifest.
+ */
+dictionary MozInputMethodInputManifest {
+  required DOMString launch_path;
+  required DOMString name;
+  DOMString? description;
+  sequence<MozInputMethodInputContextInputTypes> types;
+};
+
+/**
+ * A MozInputMethodKeyboardEventDictBase contains the following properties,
+ * indicating the properties of the keyboard event caused.
+ *
+ * This is the base dictionary type for us to create two child types that could
+ * be used as argument type in two types of methods, as WebIDL parser required.
+ *
+ */
+dictionary MozInputMethodKeyboardEventDictBase {
+  /**
+   * String/character to output, or a registered name of non-printable key.
+   * (To be defined in the inheriting dictionary types.)
+   */
+  // DOMString key;
+  /**
+   * String/char indicating the virtual hardware key pressed. Optional.
+   * Must be a value defined in
+   * http://www.w3.org/TR/DOM-Level-3-Events-code/#keyboard-chording-virtual
+   * If your keyboard app emulates physical keyboard layout, this value should
+   * not be empty string. Otherwise, it should be empty string.
+   */
+  DOMString code = "";
+  /**
+   * keyCode of the keyboard event. Optional.
+   * To be disregarded if |key| is an alphanumeric character.
+   * If the key causes inputting a character and if your keyboard app emulates
+   * a physical keyboard layout, this value should be same as the value used
+   * by Firefox for desktop. If the key causes inputting an ASCII character
+   * but if your keyboard app doesn't emulate any physical keyboard layouts,
+   * the value should be proper value for the key value.
+   */
+  long? keyCode;
+  /**
+   * Indicates whether a key would be sent repeatedly. Optional.
+   */
+  boolean repeat = false;
+  /**
+   * Optional. True if |key| property is explicitly referring to a printable key.
+   * When this is set, key will be printable even if the |key| value matches any
+   * of the registered name of non-printable keys.
+   */
+  boolean printable = false;
+};
+
+/**
+ * For methods like setComposition() and endComposition(), the optional
+ * dictionary type argument is really optional when all of it's property
+ * are optional.
+ * This dictionary type is used to denote that argument.
+ */
+dictionary MozInputMethodKeyboardEventDict : MozInputMethodKeyboardEventDictBase {
+  DOMString? key;
+};
+
+/**
+ * For methods like keydown() and keyup(), the dictionary type argument is
+ * considered required only if at least one of it's property is required.
+ * This dictionary type is used to denote that argument.
+ */
+dictionary MozInputMethodRequiredKeyboardEventDict : MozInputMethodKeyboardEventDictBase {
+  required DOMString key;
+};
diff --git a/dom/webidl/InspectorUtils.webidl b/dom/webidl/InspectorUtils.webidl
new file mode 100644
index 000000000..289fafaf5
--- /dev/null
+++ b/dom/webidl/InspectorUtils.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+dictionary InspectorRGBTriple {
+  /*
+   * NOTE: Using octet for RGB components is not generally OK, because
+   * they can be outside the 0-255 range, but for backwards-compatible
+   * named colors (which is what we use this dictionary for) the 0-255
+   * assumption is fine.
+   */
+  octet r = 0;
+  octet g = 0;
+  octet b = 0;
+};
+
+dictionary InspectorRGBATuple {
+  /*
+   * NOTE: This tuple is in the normal 0-255-sized RGB space but can be
+   * fractional and may extend outside the 0-255 range.
+   *
+   * a is in the range 0 - 1.
+   */
+  double r = 0;
+  double g = 0;
+  double b = 0;
+  double a = 1;
+};
diff --git a/dom/webidl/InstallTrigger.webidl b/dom/webidl/InstallTrigger.webidl
new file mode 100644
index 000000000..68f48ddc6
--- /dev/null
+++ b/dom/webidl/InstallTrigger.webidl
@@ -0,0 +1,90 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+
+/**
+ * A callback function that webpages can implement to be notified when triggered
+ * installs complete.
+ */
+callback InstallTriggerCallback = void(DOMString url, short status);
+
+dictionary InstallTriggerData {
+  DOMString URL;
+  DOMString? IconURL;
+  DOMString? Hash;
+};
+
+/**
+ * The interface for the InstallTrigger object available to all websites.
+ */
+[ChromeOnly,
+ JSImplementation="@mozilla.org/addons/installtrigger;1"]
+interface InstallTriggerImpl {
+  /**
+   * Retained for backwards compatibility.
+   */
+  const unsigned short SKIN = 1;
+  const unsigned short LOCALE = 2;
+  const unsigned short CONTENT = 4;
+  const unsigned short PACKAGE = 7;
+
+  /**
+   * Tests if installation is enabled.
+   */
+  boolean enabled();
+
+  /**
+   * Tests if installation is enabled.
+   *
+   * @deprecated Use "enabled" in the future.
+   */
+  boolean updateEnabled();
+
+  /**
+   * Starts a new installation of a set of add-ons.
+   *
+   * @param  aArgs
+   *         The add-ons to install. This should be a JS object, each property
+   *         is the name of an add-on to be installed. The value of the
+   *         property should either be a string URL, or an object with the
+   *         following properties:
+   *          * URL for the add-on's URL
+   *          * IconURL for an icon for the add-on
+   *          * Hash for a hash of the add-on
+   * @param  aCallback
+   *         A callback to call as each installation succeeds or fails
+   * @return true if the installations were successfully started
+   */
+  boolean install(record<DOMString, (DOMString or InstallTriggerData)> installs,
+                  optional InstallTriggerCallback callback);
+
+  /**
+   * Starts installing a new add-on.
+   *
+   * @deprecated use "install" in the future.
+   *
+   * @param  aType
+   *         Unused, retained for backwards compatibility
+   * @param  aUrl
+   *         The URL of the add-on
+   * @param  aSkin
+   *         Unused, retained for backwards compatibility
+   * @return true if the installation was successfully started
+   */
+  boolean installChrome(unsigned short type, DOMString url, DOMString skin);
+
+  /**
+   * Starts installing a new add-on.
+   *
+   * @deprecated use "install" in the future.
+   *
+   * @param  aUrl
+   *         The URL of the add-on
+   * @param  aFlags
+   *         Unused, retained for backwards compatibility
+   * @return true if the installation was successfully started
+   */
+  boolean startSoftwareUpdate(DOMString url, optional unsigned short flags);
+};
diff --git a/dom/webidl/IntersectionObserver.webidl b/dom/webidl/IntersectionObserver.webidl
new file mode 100644
index 000000000..83200d950
--- /dev/null
+++ b/dom/webidl/IntersectionObserver.webidl
@@ -0,0 +1,62 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://wicg.github.io/IntersectionObserver/
+ */
+
+[ProbablyShortLivingObject, Pref="dom.intersectionObserver.enabled"]
+interface IntersectionObserverEntry {
+  [Constant]
+  readonly attribute DOMHighResTimeStamp time;
+  [Constant]
+  readonly attribute DOMRectReadOnly? rootBounds;
+  [Constant]
+  readonly attribute DOMRectReadOnly boundingClientRect;
+  [Constant]
+  readonly attribute DOMRectReadOnly intersectionRect;
+  [Constant]
+  readonly attribute boolean isIntersecting;
+  [Constant]
+  readonly attribute double intersectionRatio;
+  [Constant]
+  readonly attribute Element target;
+};
+
+[Constructor(IntersectionCallback intersectionCallback,
+             optional IntersectionObserverInit options),
+ Pref="dom.intersectionObserver.enabled"]
+interface IntersectionObserver {
+  [Constant]
+  readonly attribute Element? root;
+  [Constant]
+  readonly attribute DOMString rootMargin;
+  [Constant,Cached]
+  readonly attribute sequence<double> thresholds;
+  void observe(Element target);
+  void unobserve(Element target);
+  void disconnect();
+  sequence<IntersectionObserverEntry> takeRecords();
+
+  [ChromeOnly]
+  readonly attribute IntersectionCallback intersectionCallback;
+};
+
+callback IntersectionCallback =
+  void (sequence<IntersectionObserverEntry> entries, IntersectionObserver observer);
+
+dictionary IntersectionObserverEntryInit {
+  required DOMHighResTimeStamp time;
+  required DOMRectInit rootBounds;
+  required DOMRectInit boundingClientRect;
+  required DOMRectInit intersectionRect;
+  required Element target;
+};
+
+dictionary IntersectionObserverInit {
+  Element?  root = null;
+  DOMString rootMargin = "0px";
+  (double or sequence<double>) threshold = 0;
+};
diff --git a/dom/webidl/IterableIterator.webidl b/dom/webidl/IterableIterator.webidl
new file mode 100644
index 000000000..633b67b1e
--- /dev/null
+++ b/dom/webidl/IterableIterator.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+dictionary IterableKeyOrValueResult {
+  any value;
+  boolean done = false;
+};
+
+dictionary IterableKeyAndValueResult {
+  sequence<any> value = [];
+  boolean done = false;
+};
diff --git a/dom/webidl/KeyAlgorithm.webidl b/dom/webidl/KeyAlgorithm.webidl
new file mode 100644
index 000000000..260b1e624
--- /dev/null
+++ b/dom/webidl/KeyAlgorithm.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/WebCryptoAPI/
+ */
+
+dictionary KeyAlgorithm {
+  required DOMString name;
+};
+
+dictionary AesKeyAlgorithm : KeyAlgorithm {
+  required unsigned short length;
+};
+
+dictionary EcKeyAlgorithm : KeyAlgorithm {
+  required DOMString namedCurve;
+};
+
+dictionary HmacKeyAlgorithm : KeyAlgorithm {
+  required KeyAlgorithm hash;
+  required unsigned long length;
+};
+
+dictionary RsaHashedKeyAlgorithm : KeyAlgorithm {
+  required unsigned short modulusLength;
+  required Uint8Array publicExponent;
+  required KeyAlgorithm hash;
+};
+
+dictionary DhKeyAlgorithm : KeyAlgorithm {
+  required Uint8Array prime;
+  required Uint8Array generator;
+};
+
diff --git a/dom/webidl/KeyEvent.webidl b/dom/webidl/KeyEvent.webidl
new file mode 100644
index 000000000..abb4b6a34
--- /dev/null
+++ b/dom/webidl/KeyEvent.webidl
@@ -0,0 +1,237 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// http://www.w3.org/TR/1999/WD-DOM-Level-2-19990923/events.html#Events-KeyEvent
+interface KeyEvent
+{
+  const unsigned long DOM_VK_CANCEL         = 0x03;
+  const unsigned long DOM_VK_HELP           = 0x06;
+  const unsigned long DOM_VK_BACK_SPACE     = 0x08;
+  const unsigned long DOM_VK_TAB            = 0x09;
+  const unsigned long DOM_VK_CLEAR          = 0x0C;
+  const unsigned long DOM_VK_RETURN         = 0x0D;
+  // DOM_VK_ENTER has been never used for representing native key events.
+  // Therefore, it's removed for preventing developers being confused.
+  // const unsigned long DOM_VK_ENTER          = 0x0E;
+  const unsigned long DOM_VK_SHIFT          = 0x10;
+  const unsigned long DOM_VK_CONTROL        = 0x11;
+  const unsigned long DOM_VK_ALT            = 0x12;
+  const unsigned long DOM_VK_PAUSE          = 0x13;
+  const unsigned long DOM_VK_CAPS_LOCK      = 0x14;
+  const unsigned long DOM_VK_KANA           = 0x15;
+  const unsigned long DOM_VK_HANGUL         = 0x15;
+  const unsigned long DOM_VK_EISU           = 0x16; // Japanese Mac keyboard only
+  const unsigned long DOM_VK_JUNJA          = 0x17;
+  const unsigned long DOM_VK_FINAL          = 0x18;
+  const unsigned long DOM_VK_HANJA          = 0x19;
+  const unsigned long DOM_VK_KANJI          = 0x19;
+  const unsigned long DOM_VK_ESCAPE         = 0x1B;
+  const unsigned long DOM_VK_CONVERT        = 0x1C;
+  const unsigned long DOM_VK_NONCONVERT     = 0x1D;
+  const unsigned long DOM_VK_ACCEPT         = 0x1E;
+  const unsigned long DOM_VK_MODECHANGE     = 0x1F;
+  const unsigned long DOM_VK_SPACE          = 0x20;
+  const unsigned long DOM_VK_PAGE_UP        = 0x21;
+  const unsigned long DOM_VK_PAGE_DOWN      = 0x22;
+  const unsigned long DOM_VK_END            = 0x23;
+  const unsigned long DOM_VK_HOME           = 0x24;
+  const unsigned long DOM_VK_LEFT           = 0x25;
+  const unsigned long DOM_VK_UP             = 0x26;
+  const unsigned long DOM_VK_RIGHT          = 0x27;
+  const unsigned long DOM_VK_DOWN           = 0x28;
+  const unsigned long DOM_VK_SELECT         = 0x29;
+  const unsigned long DOM_VK_PRINT          = 0x2A;
+  const unsigned long DOM_VK_EXECUTE        = 0x2B;
+  const unsigned long DOM_VK_PRINTSCREEN    = 0x2C;
+  const unsigned long DOM_VK_INSERT         = 0x2D;
+  const unsigned long DOM_VK_DELETE         = 0x2E;
+
+  // DOM_VK_0 - DOM_VK_9 match their ascii values
+  const unsigned long DOM_VK_0              = 0x30;
+  const unsigned long DOM_VK_1              = 0x31;
+  const unsigned long DOM_VK_2              = 0x32;
+  const unsigned long DOM_VK_3              = 0x33;
+  const unsigned long DOM_VK_4              = 0x34;
+  const unsigned long DOM_VK_5              = 0x35;
+  const unsigned long DOM_VK_6              = 0x36;
+  const unsigned long DOM_VK_7              = 0x37;
+  const unsigned long DOM_VK_8              = 0x38;
+  const unsigned long DOM_VK_9              = 0x39;
+
+  const unsigned long DOM_VK_COLON          = 0x3A;
+  const unsigned long DOM_VK_SEMICOLON      = 0x3B;
+  const unsigned long DOM_VK_LESS_THAN      = 0x3C;
+  const unsigned long DOM_VK_EQUALS         = 0x3D;
+  const unsigned long DOM_VK_GREATER_THAN   = 0x3E;
+  const unsigned long DOM_VK_QUESTION_MARK  = 0x3F;
+  const unsigned long DOM_VK_AT             = 0x40;
+
+  // DOM_VK_A - DOM_VK_Z match their ascii values
+  const unsigned long DOM_VK_A              = 0x41;
+  const unsigned long DOM_VK_B              = 0x42;
+  const unsigned long DOM_VK_C              = 0x43;
+  const unsigned long DOM_VK_D              = 0x44;
+  const unsigned long DOM_VK_E              = 0x45;
+  const unsigned long DOM_VK_F              = 0x46;
+  const unsigned long DOM_VK_G              = 0x47;
+  const unsigned long DOM_VK_H              = 0x48;
+  const unsigned long DOM_VK_I              = 0x49;
+  const unsigned long DOM_VK_J              = 0x4A;
+  const unsigned long DOM_VK_K              = 0x4B;
+  const unsigned long DOM_VK_L              = 0x4C;
+  const unsigned long DOM_VK_M              = 0x4D;
+  const unsigned long DOM_VK_N              = 0x4E;
+  const unsigned long DOM_VK_O              = 0x4F;
+  const unsigned long DOM_VK_P              = 0x50;
+  const unsigned long DOM_VK_Q              = 0x51;
+  const unsigned long DOM_VK_R              = 0x52;
+  const unsigned long DOM_VK_S              = 0x53;
+  const unsigned long DOM_VK_T              = 0x54;
+  const unsigned long DOM_VK_U              = 0x55;
+  const unsigned long DOM_VK_V              = 0x56;
+  const unsigned long DOM_VK_W              = 0x57;
+  const unsigned long DOM_VK_X              = 0x58;
+  const unsigned long DOM_VK_Y              = 0x59;
+  const unsigned long DOM_VK_Z              = 0x5A;
+
+  const unsigned long DOM_VK_WIN            = 0x5B;
+  const unsigned long DOM_VK_CONTEXT_MENU   = 0x5D;
+  const unsigned long DOM_VK_SLEEP          = 0x5F;
+
+  // Numpad keys
+  const unsigned long DOM_VK_NUMPAD0        = 0x60;
+  const unsigned long DOM_VK_NUMPAD1        = 0x61;
+  const unsigned long DOM_VK_NUMPAD2        = 0x62;
+  const unsigned long DOM_VK_NUMPAD3        = 0x63;
+  const unsigned long DOM_VK_NUMPAD4        = 0x64;
+  const unsigned long DOM_VK_NUMPAD5        = 0x65;
+  const unsigned long DOM_VK_NUMPAD6        = 0x66;
+  const unsigned long DOM_VK_NUMPAD7        = 0x67;
+  const unsigned long DOM_VK_NUMPAD8        = 0x68;
+  const unsigned long DOM_VK_NUMPAD9        = 0x69;
+  const unsigned long DOM_VK_MULTIPLY       = 0x6A;
+  const unsigned long DOM_VK_ADD            = 0x6B;
+  const unsigned long DOM_VK_SEPARATOR      = 0x6C;
+  const unsigned long DOM_VK_SUBTRACT       = 0x6D;
+  const unsigned long DOM_VK_DECIMAL        = 0x6E;
+  const unsigned long DOM_VK_DIVIDE         = 0x6F;
+
+  const unsigned long DOM_VK_F1             = 0x70;
+  const unsigned long DOM_VK_F2             = 0x71;
+  const unsigned long DOM_VK_F3             = 0x72;
+  const unsigned long DOM_VK_F4             = 0x73;
+  const unsigned long DOM_VK_F5             = 0x74;
+  const unsigned long DOM_VK_F6             = 0x75;
+  const unsigned long DOM_VK_F7             = 0x76;
+  const unsigned long DOM_VK_F8             = 0x77;
+  const unsigned long DOM_VK_F9             = 0x78;
+  const unsigned long DOM_VK_F10            = 0x79;
+  const unsigned long DOM_VK_F11            = 0x7A;
+  const unsigned long DOM_VK_F12            = 0x7B;
+  const unsigned long DOM_VK_F13            = 0x7C;
+  const unsigned long DOM_VK_F14            = 0x7D;
+  const unsigned long DOM_VK_F15            = 0x7E;
+  const unsigned long DOM_VK_F16            = 0x7F;
+  const unsigned long DOM_VK_F17            = 0x80;
+  const unsigned long DOM_VK_F18            = 0x81;
+  const unsigned long DOM_VK_F19            = 0x82;
+  const unsigned long DOM_VK_F20            = 0x83;
+  const unsigned long DOM_VK_F21            = 0x84;
+  const unsigned long DOM_VK_F22            = 0x85;
+  const unsigned long DOM_VK_F23            = 0x86;
+  const unsigned long DOM_VK_F24            = 0x87;
+
+  const unsigned long DOM_VK_NUM_LOCK       = 0x90;
+  const unsigned long DOM_VK_SCROLL_LOCK    = 0x91;
+
+  // OEM specific virtual keyCode of Windows should pass through DOM keyCode
+  // for compatibility with the other web browsers on Windows.
+  const unsigned long DOM_VK_WIN_OEM_FJ_JISHO   = 0x92;
+  const unsigned long DOM_VK_WIN_OEM_FJ_MASSHOU = 0x93;
+  const unsigned long DOM_VK_WIN_OEM_FJ_TOUROKU = 0x94;
+  const unsigned long DOM_VK_WIN_OEM_FJ_LOYA    = 0x95;
+  const unsigned long DOM_VK_WIN_OEM_FJ_ROYA    = 0x96;
+
+  const unsigned long DOM_VK_CIRCUMFLEX     = 0xA0;
+  const unsigned long DOM_VK_EXCLAMATION    = 0xA1;
+  const unsigned long DOM_VK_DOUBLE_QUOTE   = 0xA2;
+  const unsigned long DOM_VK_HASH           = 0xA3;
+  const unsigned long DOM_VK_DOLLAR         = 0xA4;
+  const unsigned long DOM_VK_PERCENT        = 0xA5;
+  const unsigned long DOM_VK_AMPERSAND      = 0xA6;
+  const unsigned long DOM_VK_UNDERSCORE     = 0xA7;
+  const unsigned long DOM_VK_OPEN_PAREN     = 0xA8;
+  const unsigned long DOM_VK_CLOSE_PAREN    = 0xA9;
+  const unsigned long DOM_VK_ASTERISK       = 0xAA;
+  const unsigned long DOM_VK_PLUS           = 0xAB;
+  const unsigned long DOM_VK_PIPE           = 0xAC;
+  const unsigned long DOM_VK_HYPHEN_MINUS   = 0xAD;
+
+  const unsigned long DOM_VK_OPEN_CURLY_BRACKET  = 0xAE;
+  const unsigned long DOM_VK_CLOSE_CURLY_BRACKET = 0xAF;
+
+  const unsigned long DOM_VK_TILDE          = 0xB0;
+
+  const unsigned long DOM_VK_VOLUME_MUTE    = 0xB5;
+  const unsigned long DOM_VK_VOLUME_DOWN    = 0xB6;
+  const unsigned long DOM_VK_VOLUME_UP      = 0xB7;
+
+  const unsigned long DOM_VK_COMMA          = 0xBC;
+  const unsigned long DOM_VK_PERIOD         = 0xBE;
+  const unsigned long DOM_VK_SLASH          = 0xBF;
+  const unsigned long DOM_VK_BACK_QUOTE     = 0xC0;
+  const unsigned long DOM_VK_OPEN_BRACKET   = 0xDB; // square bracket
+  const unsigned long DOM_VK_BACK_SLASH     = 0xDC;
+  const unsigned long DOM_VK_CLOSE_BRACKET  = 0xDD; // square bracket
+  const unsigned long DOM_VK_QUOTE          = 0xDE; // Apostrophe
+
+  const unsigned long DOM_VK_META           = 0xE0;
+  const unsigned long DOM_VK_ALTGR          = 0xE1;
+
+  // OEM specific virtual keyCode of Windows should pass through DOM keyCode
+  // for compatibility with the other web browsers on Windows.
+  const unsigned long DOM_VK_WIN_ICO_HELP    = 0xE3;
+  const unsigned long DOM_VK_WIN_ICO_00      = 0xE4;
+  const unsigned long DOM_VK_WIN_ICO_CLEAR   = 0xE6;
+  const unsigned long DOM_VK_WIN_OEM_RESET   = 0xE9;
+  const unsigned long DOM_VK_WIN_OEM_JUMP    = 0xEA;
+  const unsigned long DOM_VK_WIN_OEM_PA1     = 0xEB;
+  const unsigned long DOM_VK_WIN_OEM_PA2     = 0xEC;
+  const unsigned long DOM_VK_WIN_OEM_PA3     = 0xED;
+  const unsigned long DOM_VK_WIN_OEM_WSCTRL  = 0xEE;
+  const unsigned long DOM_VK_WIN_OEM_CUSEL   = 0xEF;
+  const unsigned long DOM_VK_WIN_OEM_ATTN    = 0xF0;
+  const unsigned long DOM_VK_WIN_OEM_FINISH  = 0xF1;
+  const unsigned long DOM_VK_WIN_OEM_COPY    = 0xF2;
+  const unsigned long DOM_VK_WIN_OEM_AUTO    = 0xF3;
+  const unsigned long DOM_VK_WIN_OEM_ENLW    = 0xF4;
+  const unsigned long DOM_VK_WIN_OEM_BACKTAB = 0xF5;
+
+  // Following keys are not used on most keyboards.  However, for compatibility
+  // with other browsers on Windows, we should define them.
+  const unsigned long DOM_VK_ATTN           = 0xF6;
+  const unsigned long DOM_VK_CRSEL          = 0xF7;
+  const unsigned long DOM_VK_EXSEL          = 0xF8;
+  const unsigned long DOM_VK_EREOF          = 0xF9;
+  const unsigned long DOM_VK_PLAY           = 0xFA;
+  const unsigned long DOM_VK_ZOOM           = 0xFB;
+  const unsigned long DOM_VK_PA1            = 0xFD;
+
+  // OEM specific virtual keyCode of Windows should pass through DOM keyCode
+  // for compatibility with the other web browsers on Windows.
+  const unsigned long DOM_VK_WIN_OEM_CLEAR  = 0xFE;
+
+  void initKeyEvent(DOMString type,
+                    optional boolean canBubble = false,
+                    optional boolean cancelable = false,
+                    optional Window? view = null,
+                    optional boolean ctrlKey = false,
+                    optional boolean altKey = false,
+                    optional boolean shiftKey = false,
+                    optional boolean metaKey = false,
+                    optional unsigned long keyCode = 0,
+                    optional unsigned long charCode = 0);
+};
diff --git a/dom/webidl/KeyIdsInitData.webidl b/dom/webidl/KeyIdsInitData.webidl
new file mode 100644
index 000000000..108a5572e
--- /dev/null
+++ b/dom/webidl/KeyIdsInitData.webidl
@@ -0,0 +1,11 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// "KeyIds" EME init data format definition/parser, as defined by
+// https://w3c.github.io/encrypted-media/format-registry/initdata/keyids.html
+dictionary KeyIdsInitData {
+  required sequence<DOMString> kids;
+};
diff --git a/dom/webidl/KeyboardEvent.webidl b/dom/webidl/KeyboardEvent.webidl
new file mode 100644
index 000000000..f6b7b33c5
--- /dev/null
+++ b/dom/webidl/KeyboardEvent.webidl
@@ -0,0 +1,54 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString typeArg, optional KeyboardEventInit keyboardEventInitDict)]
+interface KeyboardEvent : UIEvent
+{
+  readonly attribute unsigned long    charCode;
+  readonly attribute unsigned long    keyCode;
+
+  readonly attribute boolean          altKey;
+  readonly attribute boolean          ctrlKey;
+  readonly attribute boolean          shiftKey;
+  readonly attribute boolean          metaKey;
+
+  boolean getModifierState(DOMString key);
+
+  const unsigned long DOM_KEY_LOCATION_STANDARD = 0x00;
+  const unsigned long DOM_KEY_LOCATION_LEFT     = 0x01;
+  const unsigned long DOM_KEY_LOCATION_RIGHT    = 0x02;
+  const unsigned long DOM_KEY_LOCATION_NUMPAD   = 0x03;
+
+  readonly attribute unsigned long location;
+  readonly attribute boolean       repeat;
+  readonly attribute boolean       isComposing;
+
+  readonly attribute DOMString key;
+  [Pref="dom.keyboardevent.code.enabled"]
+  readonly attribute DOMString code;
+
+  // This returns the initialized dictionary for generating a
+  // same-type keyboard event
+  [Cached, ChromeOnly, Constant]
+  readonly attribute KeyboardEventInit initDict;
+};
+
+dictionary KeyboardEventInit : EventModifierInit
+{
+  DOMString      key           = "";
+  DOMString      code          = "";
+  unsigned long  location      = 0;
+  boolean        repeat        = false;
+  boolean        isComposing   = false;
+
+  // legacy attributes
+  unsigned long  charCode      = 0;
+  unsigned long  keyCode       = 0;
+  unsigned long  which         = 0;
+};
+
+// Mozilla extensions
+KeyboardEvent implements KeyEvent;
diff --git a/dom/webidl/KeyframeAnimationOptions.webidl b/dom/webidl/KeyframeAnimationOptions.webidl
new file mode 100644
index 000000000..047f46ed1
--- /dev/null
+++ b/dom/webidl/KeyframeAnimationOptions.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/fxtf/web-animations/#the-animatable-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// This typedef is off in its own file, because of bug 995352.
+typedef (unrestricted double or KeyframeAnimationOptions) UnrestrictedDoubleOrKeyframeAnimationOptions;
diff --git a/dom/webidl/KeyframeEffect.webidl b/dom/webidl/KeyframeEffect.webidl
new file mode 100644
index 000000000..c5e790b33
--- /dev/null
+++ b/dom/webidl/KeyframeEffect.webidl
@@ -0,0 +1,78 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/web-animations/#the-keyframeeffect-interfaces
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum IterationCompositeOperation {
+  "replace",
+  "accumulate"
+};
+
+dictionary KeyframeEffectOptions : AnimationEffectTimingProperties {
+  IterationCompositeOperation iterationComposite = "replace";
+  CompositeOperation          composite = "replace";
+  DOMString                   spacing = "distribute";
+};
+
+// Bug 1241783: For the constructor we use (Element or CSSPseudoElement)? for
+// the first argument since we cannot convert a mixin into a union type
+// automatically.
+[Func="nsDocument::IsWebAnimationsEnabled",
+ Constructor ((Element or CSSPseudoElement)? target,
+              object? keyframes,
+              optional (unrestricted double or KeyframeEffectOptions) options),
+ Constructor (KeyframeEffectReadOnly source)]
+interface KeyframeEffectReadOnly : AnimationEffectReadOnly {
+  // Bug 1241783: As with the constructor, we use (Element or CSSPseudoElement)?
+  // for the type of |target| instead of Animatable?
+  readonly attribute (Element or CSSPseudoElement)?  target;
+  readonly attribute IterationCompositeOperation iterationComposite;
+  readonly attribute CompositeOperation          composite;
+  readonly attribute DOMString                   spacing;
+
+  // We use object instead of ComputedKeyframe so that we can put the
+  // property-value pairs on the object.
+  [Throws] sequence<object> getKeyframes();
+};
+
+// Non-standard extensions
+dictionary AnimationPropertyValueDetails {
+  required double             offset;
+  required DOMString          value;
+           DOMString          easing;
+  required CompositeOperation composite;
+};
+
+dictionary AnimationPropertyDetails {
+  required DOMString                               property;
+  required boolean                                 runningOnCompositor;
+           DOMString                               warning;
+  required sequence<AnimationPropertyValueDetails> values;
+};
+
+partial interface KeyframeEffectReadOnly {
+  [ChromeOnly, Throws] sequence<AnimationPropertyDetails> getProperties();
+};
+
+[Func="nsDocument::IsWebAnimationsEnabled",
+ Constructor ((Element or CSSPseudoElement)? target,
+              object? keyframes,
+              optional (unrestricted double or KeyframeEffectOptions) options),
+ Constructor (KeyframeEffectReadOnly source)]
+interface KeyframeEffect : KeyframeEffectReadOnly {
+  inherit attribute (Element or CSSPseudoElement)? target;
+  inherit attribute IterationCompositeOperation    iterationComposite;
+  // Bug 1216844 - implement additive animation
+  // inherit attribute CompositeOperation          composite;
+  [SetterThrows]
+  inherit attribute DOMString                   spacing;
+  [Throws]
+  void setKeyframes (object? keyframes);
+};
diff --git a/dom/webidl/LegacyQueryInterface.webidl b/dom/webidl/LegacyQueryInterface.webidl
new file mode 100644
index 000000000..96048b03c
--- /dev/null
+++ b/dom/webidl/LegacyQueryInterface.webidl
@@ -0,0 +1,90 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface nsISupports;
+interface IID;
+
+[NoInterfaceObject,
+ // Need Exposed here, because this is a mixin onto things like Event
+ // that are exposed in workers.
+ Exposed=(Window,Worker,System)]
+interface LegacyQueryInterface {
+  // Legacy QueryInterface, only exposed to chrome or XBL code on the
+  // main thread.
+  [Exposed=Window]
+  nsISupports queryInterface(IID iid);
+};
+
+Attr implements LegacyQueryInterface;
+BarProp implements LegacyQueryInterface;
+BoxObject implements LegacyQueryInterface;
+CaretPosition implements LegacyQueryInterface;
+Comment implements LegacyQueryInterface;
+Crypto implements LegacyQueryInterface;
+CSSPrimitiveValue implements LegacyQueryInterface;
+CSSStyleDeclaration implements LegacyQueryInterface;
+CSSValueList implements LegacyQueryInterface;
+DOMImplementation implements LegacyQueryInterface;
+DOMParser implements LegacyQueryInterface;
+DOMStringMap implements LegacyQueryInterface;
+DOMTokenList implements LegacyQueryInterface;
+Document implements LegacyQueryInterface;
+DocumentFragment implements LegacyQueryInterface;
+DocumentType implements LegacyQueryInterface;
+Element implements LegacyQueryInterface;
+Event implements LegacyQueryInterface;
+EventSource implements LegacyQueryInterface;
+FileList implements LegacyQueryInterface;
+FormData implements LegacyQueryInterface;
+HTMLCollection implements LegacyQueryInterface;
+History implements LegacyQueryInterface;
+MimeTypeArray implements LegacyQueryInterface;
+NamedNodeMap implements LegacyQueryInterface;
+MutationObserver implements LegacyQueryInterface;
+MutationRecord implements LegacyQueryInterface;
+Navigator implements LegacyQueryInterface;
+NodeIterator implements LegacyQueryInterface;
+NodeList implements LegacyQueryInterface;
+Notification implements LegacyQueryInterface;
+OfflineResourceList implements LegacyQueryInterface;
+PaintRequest implements LegacyQueryInterface;
+PaintRequestList implements LegacyQueryInterface;
+Performance implements LegacyQueryInterface;
+Plugin implements LegacyQueryInterface;
+PluginArray implements LegacyQueryInterface;
+ProcessingInstruction implements LegacyQueryInterface;
+Range implements LegacyQueryInterface;
+Rect implements LegacyQueryInterface;
+Selection implements LegacyQueryInterface;
+SVGAnimatedEnumeration implements LegacyQueryInterface;
+SVGAnimatedInteger implements LegacyQueryInterface;
+SVGAnimatedNumber implements LegacyQueryInterface;
+SVGAnimatedNumberList implements LegacyQueryInterface;
+SVGAnimatedPreserveAspectRatio implements LegacyQueryInterface;
+SVGAnimatedString implements LegacyQueryInterface;
+SVGLengthList implements LegacyQueryInterface;
+SVGNumberList implements LegacyQueryInterface;
+SVGPathSegList implements LegacyQueryInterface;
+SVGPoint implements LegacyQueryInterface;
+SVGPointList implements LegacyQueryInterface;
+SVGPreserveAspectRatio implements LegacyQueryInterface;
+SVGRect implements LegacyQueryInterface;
+SVGStringList implements LegacyQueryInterface;
+SVGTransformList implements LegacyQueryInterface;
+Screen implements LegacyQueryInterface;
+StyleSheet implements LegacyQueryInterface;
+Text implements LegacyQueryInterface;
+Touch implements LegacyQueryInterface;
+TouchList implements LegacyQueryInterface;
+TreeColumns implements LegacyQueryInterface;
+TreeWalker implements LegacyQueryInterface;
+ValidityState implements LegacyQueryInterface;
+WebSocket implements LegacyQueryInterface;
+Window implements LegacyQueryInterface;
+XMLHttpRequest implements LegacyQueryInterface;
+XMLHttpRequestUpload implements LegacyQueryInterface;
+XMLSerializer implements LegacyQueryInterface;
+XPathEvaluator implements LegacyQueryInterface;
diff --git a/dom/webidl/LinkStyle.webidl b/dom/webidl/LinkStyle.webidl
new file mode 100644
index 000000000..db0bc031a
--- /dev/null
+++ b/dom/webidl/LinkStyle.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/cssom/#the-linkstyle-interface
+ */
+
+[NoInterfaceObject]
+interface LinkStyle {
+      readonly attribute StyleSheet? sheet;
+};
+
diff --git a/dom/webidl/ListBoxObject.webidl b/dom/webidl/ListBoxObject.webidl
new file mode 100644
index 000000000..5e11e923f
--- /dev/null
+++ b/dom/webidl/ListBoxObject.webidl
@@ -0,0 +1,21 @@
+
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[NoInterfaceObject]
+interface ListBoxObject : BoxObject {
+
+  long getRowCount();
+  long getNumberOfVisibleRows();
+  long getIndexOfFirstVisibleRow();
+
+  void ensureIndexIsVisible(long rowIndex);
+  void scrollToIndex(long rowIndex);
+  void scrollByLines(long numLines);
+
+  Element? getItemAtIndex(long index);
+  long getIndexOfItem(Element item);
+};
diff --git a/dom/webidl/LocalMediaStream.webidl b/dom/webidl/LocalMediaStream.webidl
new file mode 100644
index 000000000..1ef7474a2
--- /dev/null
+++ b/dom/webidl/LocalMediaStream.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origins of this IDL file are
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface LocalMediaStream : MediaStream {
+    void stop();
+};
diff --git a/dom/webidl/Location.webidl b/dom/webidl/Location.webidl
new file mode 100644
index 000000000..991da99a9
--- /dev/null
+++ b/dom/webidl/Location.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-location-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+[Unforgeable, NonOrdinaryGetPrototypeOf]
+interface Location {
+  // Bug 824857: no support for stringifier attributes yet.
+  //  stringifier attribute USVString href;
+
+  // Bug 824857 should remove this.
+  [Throws, NeedsSubjectPrincipal]
+  stringifier;
+
+  [Throws, CrossOriginWritable, NeedsSubjectPrincipal]
+           attribute USVString href;
+  [Throws, NeedsSubjectPrincipal]
+  readonly attribute USVString origin;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString protocol;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString host;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString hostname;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString port;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString pathname;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString search;
+  [Throws, NeedsSubjectPrincipal]
+           attribute USVString hash;
+
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal]
+  void assign(USVString url);
+
+  [Throws, CrossOriginCallable, UnsafeInPrerendering, NeedsSubjectPrincipal]
+  void replace(USVString url);
+
+  // XXXbz there is no forceget argument in the spec!  See bug 1037721.
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal]
+  void reload(optional boolean forceget = false);
+
+  // Bug 1085214 [SameObject] readonly attribute USVString[] ancestorOrigins;
+};
diff --git a/dom/webidl/MediaDeviceInfo.webidl b/dom/webidl/MediaDeviceInfo.webidl
new file mode 100644
index 000000000..b42519ad1
--- /dev/null
+++ b/dom/webidl/MediaDeviceInfo.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ */
+
+enum MediaDeviceKind {
+  "audioinput",
+  "audiooutput",
+  "videoinput"
+};
+
+[Func="Navigator::HasUserMediaSupport"]
+interface MediaDeviceInfo {
+  readonly attribute DOMString       deviceId;
+  readonly attribute MediaDeviceKind kind;
+  readonly attribute DOMString       label;
+  readonly attribute DOMString       groupId;
+
+  jsonifier;
+};
diff --git a/dom/webidl/MediaDevices.webidl b/dom/webidl/MediaDevices.webidl
new file mode 100644
index 000000000..e8af32325
--- /dev/null
+++ b/dom/webidl/MediaDevices.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="Navigator::HasUserMediaSupport"]
+interface MediaDevices : EventTarget {
+  [Pref="media.ondevicechange.enabled"]
+  attribute EventHandler ondevicechange;
+  MediaTrackSupportedConstraints getSupportedConstraints();
+
+  [Throws]
+  Promise<sequence<MediaDeviceInfo>> enumerateDevices();
+
+  [Throws]
+  Promise<MediaStream> getUserMedia(optional MediaStreamConstraints constraints);
+};
diff --git a/dom/webidl/MediaElementAudioSourceNode.webidl b/dom/webidl/MediaElementAudioSourceNode.webidl
new file mode 100644
index 000000000..f1ac17473
--- /dev/null
+++ b/dom/webidl/MediaElementAudioSourceNode.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface MediaElementAudioSourceNode : AudioNode {
+
+};
+
+// Mozilla extensions
+MediaElementAudioSourceNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/MediaError.webidl b/dom/webidl/MediaError.webidl
new file mode 100644
index 000000000..bd1ed4e3f
--- /dev/null
+++ b/dom/webidl/MediaError.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/html/#mediaerror
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface MediaError {
+  // Keep these constants in sync with the ones defined in HTMLMediaElement.h
+  const unsigned short MEDIA_ERR_ABORTED = 1;
+  const unsigned short MEDIA_ERR_NETWORK = 2;
+  const unsigned short MEDIA_ERR_DECODE = 3;
+  const unsigned short MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
+
+  [Constant]
+  readonly attribute unsigned short code;
+  readonly attribute DOMString message;
+};
diff --git a/dom/webidl/MediaList.webidl b/dom/webidl/MediaList.webidl
new file mode 100644
index 000000000..44e733190
--- /dev/null
+++ b/dom/webidl/MediaList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// http://dev.w3.org/csswg/cssom/#the-medialist-interface
+
+[ArrayClass]
+interface MediaList {
+  [TreatNullAs=EmptyString]
+           attribute DOMString        mediaText;
+
+  readonly attribute unsigned long    length;
+  getter DOMString?  item(unsigned long index);
+  [Throws]
+  void               deleteMedium(DOMString oldMedium);
+  [Throws]
+  void               appendMedium(DOMString newMedium);
+};
diff --git a/dom/webidl/MediaQueryList.webidl b/dom/webidl/MediaQueryList.webidl
new file mode 100644
index 000000000..af641a268
--- /dev/null
+++ b/dom/webidl/MediaQueryList.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://drafts.csswg.org/cssom-view/#mediaquerylist
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface MediaQueryList : EventTarget {
+  readonly attribute DOMString media;
+  readonly attribute boolean matches;
+
+  [Throws]
+  void addListener(EventListener? listener);
+
+  [Throws]
+  void removeListener(EventListener? listener);
+
+           attribute EventHandler onchange;
+};
diff --git a/dom/webidl/MediaQueryListEvent.webidl b/dom/webidl/MediaQueryListEvent.webidl
new file mode 100644
index 000000000..f3a66fb57
--- /dev/null
+++ b/dom/webidl/MediaQueryListEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

+/* This Source Code Form is subject to the terms of the Mozilla Public

+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,

+ * You can obtain one at http://mozilla.org/MPL/2.0/.

+ *

+ * https://drafts.csswg.org/cssom-view/#mediaquerylistevent

+ */

+

+[Constructor(DOMString type, optional MediaQueryListEventInit eventInitDict)]

+interface MediaQueryListEvent : Event {

+  readonly attribute DOMString media;

+  readonly attribute boolean matches;

+};

+

+dictionary MediaQueryListEventInit : EventInit {

+  DOMString media = "";

+  boolean matches = false;

+};

diff --git a/dom/webidl/MediaRecorder.webidl b/dom/webidl/MediaRecorder.webidl
new file mode 100644
index 000000000..65d1893e9
--- /dev/null
+++ b/dom/webidl/MediaRecorder.webidl
@@ -0,0 +1,59 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/dap/raw-file/default/media-stream-capture/MediaRecorder.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum RecordingState { "inactive", "recording", "paused" };
+
+[Constructor(MediaStream stream, optional MediaRecorderOptions options),
+ Constructor(AudioNode node, optional unsigned long output = 0,
+             optional MediaRecorderOptions options)]
+interface MediaRecorder : EventTarget {
+
+  readonly attribute MediaStream stream;
+
+  readonly attribute RecordingState state;
+
+  readonly attribute DOMString mimeType;
+
+  attribute EventHandler ondataavailable;
+
+  attribute EventHandler onerror;
+
+  attribute EventHandler onstart;
+
+  attribute EventHandler onstop;
+
+  attribute EventHandler onwarning;
+
+  [Throws]
+  void start(optional long timeSlice);
+
+  [Throws]
+  void stop();
+
+  [Throws]
+  void pause();
+
+  [Throws]
+  void resume();
+
+  [Throws]
+  void requestData();
+
+  static boolean isTypeSupported(DOMString type);
+};
+
+dictionary MediaRecorderOptions {
+  DOMString mimeType = ""; // Default encoding mimeType.
+  unsigned long audioBitsPerSecond;
+  unsigned long videoBitsPerSecond;
+  unsigned long bitsPerSecond;
+};
diff --git a/dom/webidl/MediaSource.webidl b/dom/webidl/MediaSource.webidl
new file mode 100644
index 000000000..63691e090
--- /dev/null
+++ b/dom/webidl/MediaSource.webidl
@@ -0,0 +1,47 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum MediaSourceReadyState {
+  "closed",
+  "open",
+  "ended"
+};
+
+enum MediaSourceEndOfStreamError {
+  "network",
+  "decode"
+};
+
+[Constructor, Func="mozilla::dom::MediaSource::Enabled"]
+interface MediaSource : EventTarget {
+  readonly attribute SourceBufferList sourceBuffers;
+  readonly attribute SourceBufferList activeSourceBuffers;
+  readonly attribute MediaSourceReadyState readyState;
+  [SetterThrows]
+  attribute unrestricted double duration;
+  attribute EventHandler onsourceopen;
+  attribute EventHandler onsourceended;
+  attribute EventHandler onsourceclosed;
+  [NewObject, Throws]
+  SourceBuffer addSourceBuffer(DOMString type);
+  [Throws]
+  void removeSourceBuffer(SourceBuffer sourceBuffer);
+  [Throws]
+  void endOfStream(optional MediaSourceEndOfStreamError error);
+  [Throws]
+  void setLiveSeekableRange(double start, double end);
+  [Throws]
+  void clearLiveSeekableRange();
+  static boolean isTypeSupported(DOMString type);
+  [ChromeOnly]
+  readonly attribute DOMString mozDebugReaderData;
+};
diff --git a/dom/webidl/MediaStream.webidl b/dom/webidl/MediaStream.webidl
new file mode 100644
index 000000000..c61dbff98
--- /dev/null
+++ b/dom/webidl/MediaStream.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origins of this IDL file are
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright � 2012 W3C� (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// These dictionaries need to be in a separate file from their
+// MediaTrackConstraints* counterparts due to a webidl compiler limitation.
+
+dictionary MediaStreamConstraints {
+    (boolean or MediaTrackConstraints) audio = false;
+    (boolean or MediaTrackConstraints) video = false;
+    boolean picture = false; // Mozilla legacy
+    boolean fake;       // For testing purpose. Generates frames of solid
+                        // colors if video is enabled, and sound of 1Khz sine
+                        // wave if audio is enabled.
+};
+
+[Exposed=Window,
+ Constructor,
+ Constructor (MediaStream stream),
+ Constructor (sequence<MediaStreamTrack> tracks)]
+interface MediaStream : EventTarget {
+    readonly    attribute DOMString    id;
+    sequence<AudioStreamTrack> getAudioTracks ();
+    sequence<VideoStreamTrack> getVideoTracks ();
+    sequence<MediaStreamTrack> getTracks ();
+    MediaStreamTrack?          getTrackById (DOMString trackId);
+    void                       addTrack (MediaStreamTrack track);
+    void                       removeTrack (MediaStreamTrack track);
+    MediaStream                clone ();
+    readonly    attribute boolean      active;
+                attribute EventHandler onaddtrack;
+    //             attribute EventHandler onremovetrack;
+    readonly attribute double currentTime;
+};
diff --git a/dom/webidl/MediaStreamAudioDestinationNode.webidl b/dom/webidl/MediaStreamAudioDestinationNode.webidl
new file mode 100644
index 000000000..aafff964e
--- /dev/null
+++ b/dom/webidl/MediaStreamAudioDestinationNode.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface MediaStreamAudioDestinationNode : AudioNode {
+
+    readonly attribute MediaStream stream;
+
+};
diff --git a/dom/webidl/MediaStreamAudioSourceNode.webidl b/dom/webidl/MediaStreamAudioSourceNode.webidl
new file mode 100644
index 000000000..e717ef254
--- /dev/null
+++ b/dom/webidl/MediaStreamAudioSourceNode.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface MediaStreamAudioSourceNode : AudioNode {
+
+};
+
+// Mozilla extensions
+MediaStreamAudioSourceNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/MediaStreamError.webidl b/dom/webidl/MediaStreamError.webidl
new file mode 100644
index 000000000..54c8f5792
--- /dev/null
+++ b/dom/webidl/MediaStreamError.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/mediacapture-main/getusermedia.html#idl-def-MediaStreamError
+ */
+
+// The future of MediaStreamError is uncertain.
+// https://www.w3.org/Bugs/Public/show_bug.cgi?id=26776
+
+// TODO: This is an 'exception', not an interface, by virtue of needing to be
+// passed as a promise rejection-reason. Revisit if DOMException grows a customArg
+
+[ExceptionClass, NoInterfaceObject]
+interface MediaStreamError {
+  readonly attribute DOMString  name;
+  readonly attribute DOMString? message;
+  readonly attribute DOMString? constraint;
+};
diff --git a/dom/webidl/MediaStreamEvent.webidl b/dom/webidl/MediaStreamEvent.webidl
new file mode 100644
index 000000000..56bac3a86
--- /dev/null
+++ b/dom/webidl/MediaStreamEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/webrtc.html#mediastreamevent
+ */
+
+dictionary MediaStreamEventInit : EventInit {
+    MediaStream? stream = null;
+};
+
+[Pref="media.peerconnection.enabled",
+ Constructor(DOMString type, optional MediaStreamEventInit eventInitDict)]
+interface MediaStreamEvent : Event {
+  readonly attribute MediaStream? stream;
+};
diff --git a/dom/webidl/MediaStreamTrack.webidl b/dom/webidl/MediaStreamTrack.webidl
new file mode 100644
index 000000000..7831beecb
--- /dev/null
+++ b/dom/webidl/MediaStreamTrack.webidl
@@ -0,0 +1,93 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// These two enums are in the spec even though they're not used directly in the
+// API due to https://www.w3.org/Bugs/Public/show_bug.cgi?id=19936
+// Their binding code is used in the implementation.
+
+enum VideoFacingModeEnum {
+    "user",
+    "environment",
+    "left",
+    "right"
+};
+
+enum MediaSourceEnum {
+    "camera",
+    "screen",
+    "application",
+    "window",
+    "browser",
+    "microphone",
+    "audioCapture",
+    "other"
+    // If values are added, adjust n_values in Histograms.json (2 places)
+};
+
+typedef (long or ConstrainLongRange) ConstrainLong;
+typedef (double or ConstrainDoubleRange) ConstrainDouble;
+typedef (boolean or ConstrainBooleanParameters) ConstrainBoolean;
+typedef (DOMString or sequence<DOMString> or ConstrainDOMStringParameters) ConstrainDOMString;
+
+// Note: When adding new constraints, remember to update the SelectSettings()
+// function in MediaManager.cpp to make OverconstrainedError's constraint work!
+
+dictionary MediaTrackConstraintSet {
+    ConstrainLong width;
+    ConstrainLong height;
+    ConstrainDouble frameRate;
+    ConstrainDOMString facingMode;
+    DOMString mediaSource = "camera";
+    long long browserWindow;
+    boolean scrollWithPage;
+    ConstrainDOMString deviceId;
+    ConstrainLong viewportOffsetX;
+    ConstrainLong viewportOffsetY;
+    ConstrainLong viewportWidth;
+    ConstrainLong viewportHeight;
+    ConstrainBoolean echoCancellation;
+    ConstrainBoolean mozNoiseSuppression;
+    ConstrainBoolean mozAutoGainControl;
+};
+
+dictionary MediaTrackConstraints : MediaTrackConstraintSet {
+    sequence<MediaTrackConstraintSet> advanced;
+};
+
+enum MediaStreamTrackState {
+    "live",
+    "ended"
+};
+
+[Exposed=Window]
+interface MediaStreamTrack : EventTarget {
+    readonly    attribute DOMString             kind;
+    readonly    attribute DOMString             id;
+    readonly    attribute DOMString             label;
+                attribute boolean               enabled;
+//  readonly    attribute boolean               muted;
+//              attribute EventHandler          onmute;
+//              attribute EventHandler          onunmute;
+//  readonly    attribute boolean               _readonly;
+//  readonly    attribute boolean               remote;
+    readonly    attribute MediaStreamTrackState readyState;
+                attribute EventHandler          onended;
+    MediaStreamTrack       clone ();
+    void                   stop ();
+//  MediaTrackCapabilities getCapabilities ();
+    MediaTrackConstraints  getConstraints ();
+    MediaTrackSettings     getSettings ();
+
+    [Throws]
+    Promise<void>          applyConstraints (optional MediaTrackConstraints constraints);
+//              attribute EventHandler          onoverconstrained;
+};
diff --git a/dom/webidl/MediaStreamTrackEvent.webidl b/dom/webidl/MediaStreamTrackEvent.webidl
new file mode 100644
index 000000000..538adf2f9
--- /dev/null
+++ b/dom/webidl/MediaStreamTrackEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/webrtc.html#mediastreamevent
+ */
+
+dictionary MediaStreamTrackEventInit : EventInit {
+    required MediaStreamTrack track;
+};
+
+[Exposed=Window,
+ Constructor (DOMString type, MediaStreamTrackEventInit eventInitDict)]
+interface MediaStreamTrackEvent : Event {
+    [SameObject]
+    readonly        attribute MediaStreamTrack track;
+};
diff --git a/dom/webidl/MediaTrackConstraintSet.webidl b/dom/webidl/MediaTrackConstraintSet.webidl
new file mode 100644
index 000000000..63bc6bac5
--- /dev/null
+++ b/dom/webidl/MediaTrackConstraintSet.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ */
+
+// These dictionaries need to be in a separate file from their use in unions
+// in MediaSreamTrack.webidl due to a webidl compiler limitation:
+//
+// TypeError: Dictionary contains a union that contains a dictionary in the same
+// WebIDL file.  This won't compile.  Move the inner dictionary to a different file.
+
+dictionary ConstrainLongRange {
+    long min;
+    long max;
+    long exact;
+    long ideal;
+};
+
+dictionary ConstrainDoubleRange {
+    double min;
+    double max;
+    double exact;
+    double ideal;
+};
+
+dictionary ConstrainBooleanParameters {
+    boolean exact;
+    boolean ideal;
+};
+
+dictionary ConstrainDOMStringParameters {
+    (DOMString or sequence<DOMString>) exact;
+    (DOMString or sequence<DOMString>) ideal;
+};
diff --git a/dom/webidl/MediaTrackSettings.webidl b/dom/webidl/MediaTrackSettings.webidl
new file mode 100644
index 000000000..909b9f60b
--- /dev/null
+++ b/dom/webidl/MediaTrackSettings.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/mediacapture-main/getusermedia.html
+ */
+
+dictionary MediaTrackSettings {
+    long      width;
+    long      height;
+    double    frameRate;
+    DOMString facingMode;
+    DOMString deviceId;
+    boolean echoCancellation;
+    boolean mozNoiseSuppression;
+    boolean mozAutoGainControl;
+
+    // Mozilla-specific extensions:
+
+    // http://fluffy.github.io/w3c-screen-share/#screen-based-video-constraints
+    // OBE by http://w3c.github.io/mediacapture-screen-share
+
+    DOMString mediaSource;
+
+    // Experimental https://bugzilla.mozilla.org/show_bug.cgi?id=1131568#c3
+    //              https://bugzilla.mozilla.org/show_bug.cgi?id=1193075
+
+    long long browserWindow;
+    boolean scrollWithPage;
+    long viewportOffsetX;
+    long viewportOffsetY;
+    long viewportWidth;
+    long viewportHeight;
+};
\ No newline at end of file
diff --git a/dom/webidl/MediaTrackSupportedConstraints.webidl b/dom/webidl/MediaTrackSupportedConstraints.webidl
new file mode 100644
index 000000000..31616ada7
--- /dev/null
+++ b/dom/webidl/MediaTrackSupportedConstraints.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ */
+
+dictionary MediaTrackSupportedConstraints {
+    boolean width = true;
+    boolean height = true;
+    boolean aspectRatio;        // to be supported
+    boolean frameRate = true;
+    boolean facingMode = true;
+    boolean volume;             // to be supported
+    boolean sampleRate;         // to be supported
+    boolean sampleSize;         // to be supported
+    boolean echoCancellation = true;
+    boolean mozNoiseSuppression = true;
+    boolean mozAutoGainControl = true;
+    boolean latency;            // to be supported
+    boolean deviceId = true;
+    boolean groupId;            // to be supported
+
+    // Mozilla-specific extensions:
+
+    // http://fluffy.github.io/w3c-screen-share/#screen-based-video-constraints
+    // OBE by http://w3c.github.io/mediacapture-screen-share
+
+    boolean mediaSource = true;
+
+    // Experimental https://bugzilla.mozilla.org/show_bug.cgi?id=1131568#c3
+    //              https://bugzilla.mozilla.org/show_bug.cgi?id=1193075
+
+    boolean browserWindow = true;
+    boolean scrollWithPage = true;
+    boolean viewportOffsetX = true;
+    boolean viewportOffsetY = true;
+    boolean viewportWidth = true;
+    boolean viewportHeight = true;
+};
diff --git a/dom/webidl/MenuBoxObject.webidl b/dom/webidl/MenuBoxObject.webidl
new file mode 100644
index 000000000..449cadc59
--- /dev/null
+++ b/dom/webidl/MenuBoxObject.webidl
@@ -0,0 +1,19 @@
+
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Func="IsChromeOrXBL"]
+interface MenuBoxObject : BoxObject {
+
+  void openMenu(boolean openFlag);
+
+  attribute Element? activeChild;
+
+  boolean handleKeyPress(KeyboardEvent keyEvent);
+
+  readonly attribute boolean openedWithKey;
+
+};
diff --git a/dom/webidl/MessageChannel.webidl b/dom/webidl/MessageChannel.webidl
new file mode 100644
index 000000000..41208147c
--- /dev/null
+++ b/dom/webidl/MessageChannel.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/#channel-messaging
+ */
+
+[Constructor, Exposed=(Window,Worker)]
+interface MessageChannel {
+  readonly attribute MessagePort port1;
+  readonly attribute MessagePort port2;
+};
diff --git a/dom/webidl/MessageEvent.webidl b/dom/webidl/MessageEvent.webidl
new file mode 100644
index 000000000..be5022d67
--- /dev/null
+++ b/dom/webidl/MessageEvent.webidl
@@ -0,0 +1,62 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/#messageevent
+ */
+
+[Constructor(DOMString type, optional MessageEventInit eventInitDict),
+ Exposed=(Window,Worker,System)]
+interface MessageEvent : Event {
+  /**
+   * Custom data associated with this event.
+   */
+  [GetterThrows]
+  readonly attribute any data;
+
+  /**
+   * The origin of the site from which this event originated, which is the
+   * scheme, ":", and if the URI has a host, "//" followed by the
+   * host, and if the port is not the default for the given scheme,
+   * ":" followed by that port.  This value does not have a trailing slash.
+   */
+  readonly attribute DOMString origin;
+
+  /**
+   * The last event ID string of the event source, for server-sent DOM events; this
+   * value is the empty string for cross-origin messaging.
+   */
+  readonly attribute DOMString lastEventId;
+
+  /**
+   * The window or port which originated this event.
+   */
+  readonly attribute (WindowProxy or MessagePort)? source;
+
+  /**
+   * Initializes this event with the given data, in a manner analogous to
+   * the similarly-named method on the nsIDOMEvent interface, also setting the
+   * data, origin, source, and lastEventId attributes of this appropriately.
+   */
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<MessagePort> ports;
+
+  void initMessageEvent(DOMString type,
+                        optional boolean bubbles = false,
+                        optional boolean cancelable = false,
+                        optional any data = null, 
+                        optional DOMString origin = "", 
+                        optional DOMString lastEventId = "",
+                        optional (WindowProxy or MessagePort)? source = null,
+                        optional sequence<MessagePort> ports = []);
+};
+
+dictionary MessageEventInit : EventInit {
+  any data = null;
+  DOMString origin = "";
+  DOMString lastEventId = "";
+  (Window or MessagePort)? source = null;
+  sequence<MessagePort> ports = [];
+};
diff --git a/dom/webidl/MessagePort.webidl b/dom/webidl/MessagePort.webidl
new file mode 100644
index 000000000..59c61a714
--- /dev/null
+++ b/dom/webidl/MessagePort.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * http://www.whatwg.org/specs/web-apps/current-work/#channel-messaging
+ */
+
+[Exposed=(Window,Worker,System)]
+interface MessagePort : EventTarget {
+  [Throws]
+  void postMessage(any message, optional sequence<Transferable> transferable);
+
+  void start();
+  void close();
+
+  // event handlers
+  attribute EventHandler onmessage;
+};
+// MessagePort implements Transferable;
diff --git a/dom/webidl/MimeType.webidl b/dom/webidl/MimeType.webidl
new file mode 100644
index 000000000..a33d31640
--- /dev/null
+++ b/dom/webidl/MimeType.webidl
@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MimeType {
+  readonly attribute DOMString description;
+  readonly attribute Plugin? enabledPlugin;
+  readonly attribute DOMString suffixes;
+  readonly attribute DOMString type;
+};
diff --git a/dom/webidl/MimeTypeArray.webidl b/dom/webidl/MimeTypeArray.webidl
new file mode 100644
index 000000000..21bfc6dc0
--- /dev/null
+++ b/dom/webidl/MimeTypeArray.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// [LegacyUnenumerableNamedProperties]
+// Named properties enumerable for now; see
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1270364
+interface MimeTypeArray {
+  readonly attribute unsigned long length;
+
+  getter MimeType? item(unsigned long index);
+  getter MimeType? namedItem(DOMString name);
+};
diff --git a/dom/webidl/MouseEvent.webidl b/dom/webidl/MouseEvent.webidl
new file mode 100644
index 000000000..192519d57
--- /dev/null
+++ b/dom/webidl/MouseEvent.webidl
@@ -0,0 +1,114 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString typeArg, optional MouseEventInit mouseEventInitDict)]
+interface MouseEvent : UIEvent {
+  readonly attribute long           screenX;
+  readonly attribute long           screenY;
+  readonly attribute long           clientX;
+  readonly attribute long           clientY;
+  readonly attribute long           offsetX;
+  readonly attribute long           offsetY;
+  readonly attribute boolean        ctrlKey;
+  readonly attribute boolean        shiftKey;
+  readonly attribute boolean        altKey;
+  readonly attribute boolean        metaKey;
+  readonly attribute short          button;
+  readonly attribute unsigned short buttons;
+  readonly attribute EventTarget?   relatedTarget;
+  readonly attribute DOMString?     region;
+
+  // Pointer Lock
+  readonly attribute long           movementX;
+  readonly attribute long           movementY;
+
+  // Deprecated in DOM Level 3:
+void initMouseEvent(DOMString typeArg,
+                    optional boolean canBubbleArg = false,
+                    optional boolean cancelableArg = false,
+                    optional Window? viewArg = null,
+                    optional long detailArg = 0,
+                    optional long screenXArg = 0,
+                    optional long screenYArg = 0,
+                    optional long clientXArg = 0,
+                    optional long clientYArg = 0,
+                    optional boolean ctrlKeyArg = false,
+                    optional boolean altKeyArg = false,
+                    optional boolean shiftKeyArg = false,
+                    optional boolean metaKeyArg = false,
+                    optional short buttonArg = 0,
+                    optional EventTarget? relatedTargetArg = null);
+  // Introduced in DOM Level 3:
+  boolean                           getModifierState(DOMString keyArg);
+};
+
+// Suggested initMouseEvent replacement initializer:
+dictionary MouseEventInit : EventModifierInit {
+  // Attributes for MouseEvent:
+  long           screenX       = 0;
+  long           screenY       = 0;
+  long           clientX       = 0;
+  long           clientY       = 0;
+  short          button        = 0;
+  // Note: "buttons" was not previously initializable through initMouseEvent!
+  unsigned short buttons       = 0;
+  EventTarget?   relatedTarget = null;
+
+  // Pointer Lock
+  long           movementX = 0;
+  long           movementY = 0;
+};
+
+// Mozilla extensions
+partial interface MouseEvent
+{
+  [BinaryName="movementX", Pref="pointer-lock-api.prefixed.enabled"]
+  readonly attribute long mozMovementX;
+  [BinaryName="movementY", Pref="pointer-lock-api.prefixed.enabled"]
+  readonly attribute long mozMovementY;
+
+  // Finger or touch pressure event value
+  // ranges between 0.0 and 1.0
+  readonly attribute float mozPressure;
+
+  const unsigned short    MOZ_SOURCE_UNKNOWN    = 0;
+  const unsigned short    MOZ_SOURCE_MOUSE      = 1;
+  const unsigned short    MOZ_SOURCE_PEN        = 2;
+  const unsigned short    MOZ_SOURCE_ERASER     = 3;
+  const unsigned short    MOZ_SOURCE_CURSOR     = 4;
+  const unsigned short    MOZ_SOURCE_TOUCH      = 5;
+  const unsigned short    MOZ_SOURCE_KEYBOARD   = 6;
+
+  readonly attribute unsigned short mozInputSource;
+
+  void initNSMouseEvent(DOMString typeArg,
+                        optional boolean canBubbleArg = false,
+                        optional boolean cancelableArg = false,
+                        optional Window? viewArg = null,
+                        optional long detailArg = 0,
+                        optional long screenXArg = 0,
+                        optional long screenYArg = 0,
+                        optional long clientXArg = 0,
+                        optional long clientYArg = 0,
+                        optional boolean ctrlKeyArg = false,
+                        optional boolean altKeyArg = false,
+                        optional boolean shiftKeyArg = false,
+                        optional boolean metaKeyArg = false,
+                        optional short buttonArg = 0,
+                        optional EventTarget? relatedTargetArg = null,
+                        optional float pressure = 0,
+                        optional unsigned short inputSourceArg = 0);
+  [ChromeOnly]
+  readonly attribute boolean hitCluster; // True when touch occurs in a cluster of links
+
+};
+
diff --git a/dom/webidl/MouseScrollEvent.webidl b/dom/webidl/MouseScrollEvent.webidl
new file mode 100644
index 000000000..c1e52bd8c
--- /dev/null
+++ b/dom/webidl/MouseScrollEvent.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MouseScrollEvent : MouseEvent
+{
+  const long HORIZONTAL_AXIS = 1;
+  const long VERTICAL_AXIS = 2;
+
+  readonly attribute long axis;
+
+  void initMouseScrollEvent(DOMString type,
+                            optional boolean canBubble = false,
+                            optional boolean cancelable = false,
+                            optional Window? view = null,
+                            optional long detail = 0,
+                            optional long screenX = 0,
+                            optional long screenY = 0,
+                            optional long clientX = 0,
+                            optional long clientY = 0,
+                            optional boolean ctrlKey = false,
+                            optional boolean altKey = false,
+                            optional boolean shiftKey = false,
+                            optional boolean metaKey = false,
+                            optional short button = 0,
+                            optional EventTarget? relatedTarget = null,
+                            optional long axis = 0);
+};
diff --git a/dom/webidl/MozPowerManager.webidl b/dom/webidl/MozPowerManager.webidl
new file mode 100644
index 000000000..becf6ff3a
--- /dev/null
+++ b/dom/webidl/MozPowerManager.webidl
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface MozWakeLockListener;
+
+/**
+  * The reason for the factory reset.
+  * "normal" : simple factory reset.
+  * "wipe"   : will also attempt to wipe all user storage areas.
+  * "root"   : simple factory reset that also root the phone to get more
+  *            privileges when using devtools.
+  */
+enum FactoryResetReason {
+    "normal",
+    "wipe",
+    "root"
+};
+
+/**
+ * This interface implements navigator.mozPower
+ */
+[ChromeOnly]
+interface MozPowerManager
+{
+    [Throws]
+    void    powerOff();
+    [Throws]
+    void    reboot();
+    void    factoryReset(optional FactoryResetReason reason = "normal");
+
+    /**
+     * The listeners are notified when a resource changes its lock state to:
+     *  - unlocked
+     *  - locked but not visible
+     *  - locked and visible
+     */
+    void    addWakeLockListener(MozWakeLockListener aListener);
+    void    removeWakeLockListener(MozWakeLockListener aListener);
+
+    /**
+     * Query the wake lock state of the topic.
+     *
+     * Possible states are:
+     *
+     *  - "unlocked" - nobody holds the wake lock.
+     *
+     *  - "locked-foreground" - at least one window holds the wake lock,
+     *    and it is visible.
+     *
+     *  - "locked-background" - at least one window holds the wake lock,
+     *    but all of them are hidden.
+     *
+     * @param aTopic The resource name related to the wake lock.
+     */
+    [Throws]
+    DOMString getWakeLockState(DOMString aTopic);
+
+    /**
+     * Is the device's screen currently enabled?  This attribute controls the
+     * device's screen, so setting it to false will turn off the screen.
+     */
+    attribute boolean screenEnabled;
+
+    /**
+     * Is the device's keypad/button backlight enabled? Setting it to false will
+     * turn off the device's keypad/button backlight. And the brightness level
+     * is the same as |screenBrightness|.
+     */
+    attribute boolean keyLightEnabled;
+
+    /**
+     * How bright is the screen's backlight, on a scale from 0 (very dim) to 1
+     * (full brightness)?  Setting this attribute modifies the screen's
+     * brightness.
+     *
+     * You can read and write this attribute even when the screen is disabled,
+     * but the backlight is off while the screen is disabled.
+     *
+     * If you write a value of X into this attribute, the attribute may not have
+     * the same value X when you later read it.  Most screens don't support as
+     * many different brightness levels as there are doubles between 0 and 1, so
+     * we may reduce the value's precision before storing it.
+     *
+     * @throw NS_ERROR_INVALID_ARG if brightness is not in the range [0, 1].
+     */
+    [SetterThrows]
+    attribute double screenBrightness;
+
+    /**
+     * Is it possible that the device's CPU will sleep after the screen is
+     * disabled?  Setting this attribute to false will prevent the device
+     * entering suspend state.
+     */
+    attribute boolean cpuSleepAllowed;
+};
diff --git a/dom/webidl/MozSelfSupport.webidl b/dom/webidl/MozSelfSupport.webidl
new file mode 100644
index 000000000..d13aa112c
--- /dev/null
+++ b/dom/webidl/MozSelfSupport.webidl
@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * The MozSelfSupport interface allows external Mozilla support sites such as
+ * FHR and SUMO to access data and control settings that are not otherwise
+ * exposed to external content.
+ *
+ * At the moment, this is a ChromeOnly interface, but the plan is to allow
+ * specific Mozilla domains to access it directly.
+ */
+[ChromeOnly,
+ JSImplementation="@mozilla.org/mozselfsupport;1",
+ Constructor()]
+interface MozSelfSupport
+{
+  /**
+   * Controls whether uploading FHR data is allowed.
+   */
+  attribute boolean healthReportDataSubmissionEnabled;
+
+  /**
+   * Retrieve a list of the archived Telemetry pings.
+   * This contains objects with ping info, which are of the form:
+   * {
+   *   type: <string>, // The pings type, e.g. "main", "environment-change", ...
+   *   timestampCreated: <number>, // The time the ping was created (ms since unix epoch).
+   *   id: <string>, // The pings UUID.
+   * }
+   *
+   * @return Promise<sequence<Object>>
+   *         Resolved with the ping infos when the archived ping list has been built.
+   */
+  Promise<sequence<object>> getTelemetryPingList();
+
+  /**
+   * Retrieve an archived Telemetry ping by it's id.
+   * This will load the ping data async from the archive, possibly hitting the disk.
+   *
+   * @return Promise<Object>
+   *         Resolved with the ping data, see the Telemetry "main" ping documentation for the format.
+   */
+  Promise<object> getTelemetryPing(DOMString pingID);
+
+  /**
+   * Get the current Telemetry environment - see the Telemetry documentation for details on the format.
+   *
+   * @return Promise<Object>
+   *         Resolved with an object containing the Telemetry environment data.
+   */
+  Promise<object> getCurrentTelemetryEnvironment();
+
+  /**
+   * Get a Telemetry "main" ping containing the current session measurements.
+   *
+   * @return Promise<Object>
+   *         Resolved with the ping data, see the Telemetry "main" ping documentation for the format.
+   */
+  Promise<object> getCurrentTelemetrySubsessionPing();
+
+  /**
+   * Resets a named pref:
+   * - if there is a default value, then change the value back to default,
+   * - if there's no default value, then delete the pref,
+   * - no-op otherwise.
+   *
+   * @param DOMString
+   *        The name of the pref to reset.
+   */
+  void resetPref(DOMString name);
+
+  /**
+   * Resets original search engines, and resets the default one.
+   */
+  void resetSearchEngines();
+};
diff --git a/dom/webidl/MozSettingsEvent.webidl b/dom/webidl/MozSettingsEvent.webidl
new file mode 100644
index 000000000..6ca596a4c
--- /dev/null
+++ b/dom/webidl/MozSettingsEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional MozSettingsEventInit eventInitDict),
+ ChromeOnly]
+interface MozSettingsEvent : Event
+{
+  readonly attribute DOMString? settingName;
+  readonly attribute any settingValue;
+};
+
+dictionary MozSettingsEventInit : EventInit
+{
+  DOMString settingName = "";
+  any settingValue = null;
+};
diff --git a/dom/webidl/MozSettingsTransactionEvent.webidl b/dom/webidl/MozSettingsTransactionEvent.webidl
new file mode 100644
index 000000000..95aa83f43
--- /dev/null
+++ b/dom/webidl/MozSettingsTransactionEvent.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional MozSettingsTransactionEventInit eventInitDict),
+ ChromeOnly]
+interface MozSettingsTransactionEvent : Event
+{
+  readonly attribute DOMString? error;
+};
+
+dictionary MozSettingsTransactionEventInit : EventInit
+{
+  DOMString error = "";
+};
diff --git a/dom/webidl/MozTetheringManager.webidl b/dom/webidl/MozTetheringManager.webidl
new file mode 100644
index 000000000..43d783734
--- /dev/null
+++ b/dom/webidl/MozTetheringManager.webidl
@@ -0,0 +1,57 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+enum TetheringType {
+  "bluetooth",
+  "usb",
+  "wifi"
+};
+
+enum SecurityType {
+  "open",
+  "wpa-psk",
+  "wpa2-psk"
+};
+
+dictionary WifiTetheringConfig {
+  DOMString ssid;
+  SecurityType security;
+  DOMString key;
+};
+
+dictionary TetheringConfiguration {
+  DOMString ip;
+  DOMString prefix;
+  DOMString startIp;
+  DOMString endIp;
+  DOMString dns1;
+  DOMString dns2;
+  WifiTetheringConfig wifiConfig;
+};
+
+[JSImplementation="@mozilla.org/tetheringmanager;1",
+ NavigatorProperty="mozTetheringManager",
+ ChromeOnly]
+interface MozTetheringManager {
+  /**
+   * Enable/Disable tethering.
+   * @param enabled True to enable tethering, False to disable tethering.
+   * @param type Tethering type to enable/disable.
+   * @param config Configuration should have following fields when enable is True:
+   *               - ip ip address.
+   *               - prefix mask length.
+   *               - startIp start ip address allocated by DHCP server for tethering.
+   *               - endIp end ip address allocated by DHCP server for tethering.
+   *               - dns1 first DNS server address.
+   *               - dns2 second DNS server address.
+   *               - wifiConfig wifi tethering configuration
+   *                  - ssid SSID network name.
+   *                  - security open, wpa-psk or wpa2-psk.
+   *                  - key password for wpa-psk or wpa2-psk.
+   *               config should not be set when enabled is False.
+   */
+  Promise<any> setTetheringEnabled(boolean enabled,
+                                   TetheringType type,
+                                   optional TetheringConfiguration config);
+};
diff --git a/dom/webidl/MozTimeManager.webidl b/dom/webidl/MozTimeManager.webidl
new file mode 100644
index 000000000..0308835fb
--- /dev/null
+++ b/dom/webidl/MozTimeManager.webidl
@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Func="mozilla::dom::time::TimeManager::PrefEnabled"]
+interface MozTimeManager {
+  /* Set the system time.
+   *
+   * The |time| argument can be either a Date object or a number.
+   *
+   * - If |time| is a number, it's interpreted as milliseconds
+   *   since the epoch (midnight UTC on January 1, 1970).
+   * - If |time| is a Date object, |set(time)| is equivalent to
+   *   |set(time.getTime())|.
+   */
+  void set(Date time);
+  void set(double time);
+};
diff --git a/dom/webidl/MozWakeLock.webidl b/dom/webidl/MozWakeLock.webidl
new file mode 100644
index 000000000..f08ee30fe
--- /dev/null
+++ b/dom/webidl/MozWakeLock.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Pref="dom.wakelock.enabled", Func="Navigator::HasWakeLockSupport"]
+interface MozWakeLock
+{
+    readonly attribute DOMString topic;
+
+    /**
+     * Release the wake lock.
+     * @throw NS_ERROR_DOM_INVALID_STATE_ERR if already unlocked.
+     */
+    [Throws]
+    void unlock();
+};
diff --git a/dom/webidl/MutationEvent.webidl b/dom/webidl/MutationEvent.webidl
new file mode 100644
index 000000000..53625b4f9
--- /dev/null
+++ b/dom/webidl/MutationEvent.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+interface MutationEvent : Event
+{
+  const unsigned short MODIFICATION = 1;
+  const unsigned short ADDITION     = 2;
+  const unsigned short REMOVAL      = 3;
+
+  readonly attribute Node?          relatedNode;
+  readonly attribute DOMString      prevValue;
+  readonly attribute DOMString      newValue;
+  readonly attribute DOMString      attrName;
+  readonly attribute unsigned short attrChange;
+
+  [Throws]
+  void initMutationEvent(DOMString type,
+                         optional boolean canBubble = false,
+                         optional boolean cancelable = false,
+                         optional Node? relatedNode = null,
+                         optional DOMString prevValue = "",
+                         optional DOMString newValue = "",
+                         optional DOMString attrName = "",
+                         optional unsigned short attrChange = 0);
+};
diff --git a/dom/webidl/MutationObserver.webidl b/dom/webidl/MutationObserver.webidl
new file mode 100644
index 000000000..893e0cc50
--- /dev/null
+++ b/dom/webidl/MutationObserver.webidl
@@ -0,0 +1,74 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org
+ */
+
+[ProbablyShortLivingObject]
+interface MutationRecord {
+  [Constant]
+  readonly attribute DOMString type;
+  // .target is not nullable per the spec, but in order to prevent crashes,
+  // if there are GC/CC bugs in Gecko, we let the property to be null.
+  [Constant]
+  readonly attribute Node? target;
+  [Constant]
+  readonly attribute NodeList addedNodes;
+  [Constant]
+  readonly attribute NodeList removedNodes;
+  [Constant]
+  readonly attribute Node? previousSibling;
+  [Constant]
+  readonly attribute Node? nextSibling;
+  [Constant]
+  readonly attribute DOMString? attributeName;
+  [Constant]
+  readonly attribute DOMString? attributeNamespace;
+  [Constant]
+  readonly attribute DOMString? oldValue;
+  [Constant,Cached,ChromeOnly]
+  readonly attribute sequence<Animation> addedAnimations;
+  [Constant,Cached,ChromeOnly]
+  readonly attribute sequence<Animation> changedAnimations;
+  [Constant,Cached,ChromeOnly]
+  readonly attribute sequence<Animation> removedAnimations;
+};
+
+[Constructor(MutationCallback mutationCallback)]
+interface MutationObserver {
+  [Throws]
+  void observe(Node target, optional MutationObserverInit options);
+  void disconnect();
+  sequence<MutationRecord> takeRecords();
+
+  [ChromeOnly, Throws]
+  sequence<MutationObservingInfo?> getObservingInfo();
+  [ChromeOnly]
+  readonly attribute MutationCallback mutationCallback;
+  [ChromeOnly]
+  attribute boolean mergeAttributeRecords;
+};
+
+callback MutationCallback = void (sequence<MutationRecord> mutations, MutationObserver observer);
+
+dictionary MutationObserverInit {
+  boolean childList = false;
+  boolean attributes;
+  boolean characterData;
+  boolean subtree = false;
+  boolean attributeOldValue;
+  boolean characterDataOldValue;
+  [ChromeOnly]
+  boolean nativeAnonymousChildList = false;
+  [ChromeOnly]
+  boolean animations = false;
+  sequence<DOMString> attributeFilter;
+};
+
+dictionary MutationObservingInfo : MutationObserverInit
+{
+  Node? observedNode = null;
+};
diff --git a/dom/webidl/NamedNodeMap.webidl b/dom/webidl/NamedNodeMap.webidl
new file mode 100644
index 000000000..88e2ff51f
--- /dev/null
+++ b/dom/webidl/NamedNodeMap.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[LegacyUnenumerableNamedProperties]
+interface NamedNodeMap {
+  getter Attr? getNamedItem(DOMString name);
+  [CEReactions, Throws, BinaryName="setNamedItemNS"]
+  Attr? setNamedItem(Attr arg);
+  [CEReactions, Throws]
+  Attr removeNamedItem(DOMString name);
+
+  getter Attr? item(unsigned long index);
+  readonly attribute unsigned long length;
+
+  Attr? getNamedItemNS(DOMString? namespaceURI, DOMString localName);
+  [CEReactions, Throws]
+  Attr? setNamedItemNS(Attr arg);
+  [CEReactions, Throws]
+  Attr removeNamedItemNS(DOMString? namespaceURI, DOMString localName);
+};
diff --git a/dom/webidl/NativeOSFileInternals.webidl b/dom/webidl/NativeOSFileInternals.webidl
new file mode 100644
index 000000000..36cc1a3a1
--- /dev/null
+++ b/dom/webidl/NativeOSFileInternals.webidl
@@ -0,0 +1,21 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtaone at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Options for nsINativeOSFileInternals::Read
+ */
+dictionary NativeOSFileReadOptions
+{
+  /**
+   * If specified, convert the raw bytes to a String
+   * with the specified encoding. Otherwise, return
+   * the raw bytes as a TypedArray.
+   */
+  DOMString? encoding;
+
+  /**
+   * If specified, limit the number of bytes to read.
+   */
+  unsigned long long? bytes;
+};
diff --git a/dom/webidl/Navigator.webidl b/dom/webidl/Navigator.webidl
new file mode 100644
index 000000000..888aae219
--- /dev/null
+++ b/dom/webidl/Navigator.webidl
@@ -0,0 +1,317 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#the-navigator-object
+ * http://www.w3.org/TR/tracking-dnt/
+ * http://www.w3.org/TR/geolocation-API/#geolocation_interface
+ * http://www.w3.org/TR/vibration/#vibration-interface
+ * http://www.w3.org/2012/sysapps/runtime/#extension-to-the-navigator-interface-1
+ * https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#navigator-interface-extension
+ * http://www.w3.org/TR/beacon/#sec-beacon-method
+ * https://html.spec.whatwg.org/#navigatorconcurrenthardware
+ *
+ * © Copyright 2004-2020 Apple Computer, Inc., Mozilla Foundation,
+ * Opera Software ASA and Moonchild Productions. You are granted a license to use,
+ * reproduce and create derivative works of this document.
+ */
+
+// http://www.whatwg.org/specs/web-apps/current-work/#the-navigator-object
+[HeaderFile="Navigator.h"]
+interface Navigator {
+  // objects implementing this interface also implement the interfaces given below
+};
+Navigator implements NavigatorID;
+Navigator implements NavigatorLanguage;
+Navigator implements NavigatorOnLine;
+Navigator implements NavigatorContentUtils;
+Navigator implements NavigatorStorageUtils;
+Navigator implements NavigatorConcurrentHardware;
+Navigator implements NavigatorStorage;
+Navigator implements NavigatorGlobalPrivacyControl;
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorID {
+  // WebKit/Blink/Trident/Presto support this (hardcoded "Mozilla").
+  [Constant, Cached]
+  readonly attribute DOMString appCodeName; // constant "Mozilla"
+  [Constant, Cached]
+  readonly attribute DOMString appName;
+  [Constant, Cached]
+  readonly attribute DOMString appVersion;
+  [Constant, Cached]
+  readonly attribute DOMString platform;
+  [Pure, Cached, Throws]
+  readonly attribute DOMString userAgent;
+  [Constant, Cached]
+  readonly attribute DOMString product; // constant "Gecko"
+
+  // Everyone but WebKit/Blink supports this.  See bug 679971.
+  [Exposed=Window]
+  boolean taintEnabled(); // constant false
+};
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorLanguage {
+
+  // These two attributes are cached because this interface is also implemented
+  // by Workernavigator and this way we don't have to go back to the
+  // main-thread from the worker thread anytime we need to retrieve them. They
+  // are updated when pref intl.accept_languages is changed.
+
+  [Pure, Cached]
+  readonly attribute DOMString? language;
+  [Pure, Cached, Frozen]
+  readonly attribute sequence<DOMString> languages;
+};
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorOnLine {
+  readonly attribute boolean onLine;
+};
+
+[NoInterfaceObject]
+interface NavigatorContentUtils {
+  // content handler registration
+  [Throws]
+  void registerProtocolHandler(DOMString scheme, DOMString url, DOMString title);
+  [Throws]
+  void registerContentHandler(DOMString mimeType, DOMString url, DOMString title);
+  // NOT IMPLEMENTED
+  //DOMString isProtocolHandlerRegistered(DOMString scheme, DOMString url);
+  //DOMString isContentHandlerRegistered(DOMString mimeType, DOMString url);
+  //void unregisterProtocolHandler(DOMString scheme, DOMString url);
+  //void unregisterContentHandler(DOMString mimeType, DOMString url);
+};
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorStorage {
+  [Func="mozilla::dom::StorageManager::PrefEnabled"]
+  readonly attribute StorageManager storage;
+};
+
+[NoInterfaceObject]
+interface NavigatorStorageUtils {
+  // NOT IMPLEMENTED
+  //void yieldForStorageUpdates();
+};
+
+partial interface Navigator {
+  [Throws]
+  readonly attribute Permissions permissions;
+};
+
+// Things that definitely need to be in the spec and and are not for some
+// reason.  See https://www.w3.org/Bugs/Public/show_bug.cgi?id=22406
+partial interface Navigator {
+  [Throws]
+  readonly attribute MimeTypeArray mimeTypes;
+  [Throws]
+  readonly attribute PluginArray plugins;
+};
+
+// https://globalprivacycontrol.github.io/gpc-spec/
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorGlobalPrivacyControl {
+  readonly attribute boolean globalPrivacyControl;
+};
+
+// http://www.w3.org/TR/geolocation-API/#geolocation_interface
+[NoInterfaceObject]
+interface NavigatorGeolocation {
+  [Throws, Pref="geo.enabled"]
+  readonly attribute Geolocation geolocation;
+};
+Navigator implements NavigatorGeolocation;
+
+// http://www.w3.org/TR/pointerevents/#extensions-to-the-navigator-interface
+partial interface Navigator {
+    [Pref="dom.w3c_pointer_events.enabled"]
+    readonly attribute long maxTouchPoints;
+};
+
+// Mozilla-specific extensions
+
+callback interface MozIdleObserver {
+  // Time is in seconds and is read only when idle observers are added
+  // and removed.
+  readonly attribute unsigned long time;
+  void onidle();
+  void onactive();
+};
+
+// nsIDOMNavigator
+partial interface Navigator {
+  [Throws, Constant, Cached]
+  readonly attribute DOMString oscpu;
+  // WebKit/Blink support this; Trident/Presto do not.
+  readonly attribute DOMString vendor;
+  // WebKit/Blink supports this (hardcoded ""); Trident/Presto do not.
+  readonly attribute DOMString vendorSub;
+  // WebKit/Blink supports this (hardcoded "20030107"); Trident/Presto don't
+  readonly attribute DOMString productSub;
+  // WebKit/Blink/Trident/Presto support this.
+  readonly attribute boolean cookieEnabled;
+  [Throws, Constant, Cached]
+  readonly attribute DOMString buildID;
+  [Throws, ChromeOnly, UnsafeInPrerendering]
+  readonly attribute MozPowerManager mozPower;
+
+  // WebKit/Blink/Trident/Presto support this.
+  [Throws]
+  boolean javaEnabled();
+
+  /**
+   * Navigator requests to add an idle observer to the existing window.
+   */
+  [Throws, ChromeOnly]
+  void addIdleObserver(MozIdleObserver aIdleObserver);
+
+  /**
+   * Navigator requests to remove an idle observer from the existing window.
+   */
+  [Throws, ChromeOnly]
+  void removeIdleObserver(MozIdleObserver aIdleObserver);
+
+  /**
+   * Request a wake lock for a resource.
+   *
+   * A page holds a wake lock to request that a resource not be turned
+   * off (or otherwise made unavailable).
+   *
+   * The topic is the name of a resource that might be made unavailable for
+   * various reasons. For example, on a mobile device the power manager might
+   * decide to turn off the screen after a period of idle time to save power.
+   *
+   * The resource manager checks the lock state of a topic before turning off
+   * the associated resource. For example, a page could hold a lock on the
+   * "screen" topic to prevent the screensaver from appearing or the screen
+   * from turning off.
+   *
+   * The resource manager defines what each topic means and sets policy.  For
+   * example, the resource manager might decide to ignore 'screen' wake locks
+   * held by pages which are not visible.
+   *
+   * One topic can be locked multiple times; it is considered released only when
+   * all locks on the topic have been released.
+   *
+   * The returned MozWakeLock object is a token of the lock.  You can
+   * unlock the lock via the object's |unlock| method.  The lock is released
+   * automatically when its associated window is unloaded.
+   *
+   * @param aTopic resource name
+   */
+  [Throws, Pref="dom.wakelock.enabled", Func="Navigator::HasWakeLockSupport", UnsafeInPrerendering]
+  MozWakeLock requestWakeLock(DOMString aTopic);
+
+  /**
+   * Make CPU instruction subset information available for UpdateUtils.
+   */
+  [ChromeOnly]
+  readonly attribute boolean cpuHasSSE2;
+};
+
+// nsIDOMNavigatorDesktopNotification
+partial interface Navigator {
+  [Throws, Pref="notification.feature.enabled", UnsafeInPrerendering]
+  readonly attribute DesktopNotificationCenter mozNotification;
+};
+
+// NetworkInformation
+partial interface Navigator {
+  [Throws, Pref="dom.netinfo.enabled"]
+  readonly attribute NetworkInformation connection;
+};
+
+#ifdef MOZ_GAMEPAD
+// https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#navigator-interface-extension
+partial interface Navigator {
+  [Throws, Pref="dom.gamepad.enabled"]
+  sequence<Gamepad?> getGamepads();
+};
+partial interface Navigator {
+  [Pref="dom.gamepad.test.enabled"]
+  GamepadServiceTest requestGamepadServiceTest();
+};
+#endif // MOZ_GAMEPAD
+
+#ifdef MOZ_TIME_MANAGER
+// nsIDOMMozNavigatorTime
+partial interface Navigator {
+  [Throws, ChromeOnly, UnsafeInPrerendering]
+  readonly attribute MozTimeManager mozTime;
+};
+#endif // MOZ_TIME_MANAGER
+
+#ifdef MOZ_AUDIO_CHANNEL_MANAGER
+// nsIMozNavigatorAudioChannelManager
+partial interface Navigator {
+  [Throws]
+  readonly attribute AudioChannelManager mozAudioChannelManager;
+};
+#endif // MOZ_AUDIO_CHANNEL_MANAGER
+
+callback NavigatorUserMediaSuccessCallback = void (MediaStream stream);
+callback NavigatorUserMediaErrorCallback = void (MediaStreamError error);
+
+partial interface Navigator {
+  [Throws, Func="Navigator::HasUserMediaSupport"]
+  readonly attribute MediaDevices mediaDevices;
+
+  // Deprecated. Use mediaDevices.getUserMedia instead.
+  [Deprecated="NavigatorGetUserMedia", Throws,
+   Func="Navigator::HasUserMediaSupport", UnsafeInPrerendering]
+  void mozGetUserMedia(MediaStreamConstraints constraints,
+                       NavigatorUserMediaSuccessCallback successCallback,
+                       NavigatorUserMediaErrorCallback errorCallback);
+};
+
+// nsINavigatorUserMedia
+callback MozGetUserMediaDevicesSuccessCallback = void (nsIVariant? devices);
+partial interface Navigator {
+  [Throws, ChromeOnly]
+  void mozGetUserMediaDevices(MediaStreamConstraints constraints,
+                              MozGetUserMediaDevicesSuccessCallback onsuccess,
+                              NavigatorUserMediaErrorCallback onerror,
+                              // The originating innerWindowID is needed to
+                              // avoid calling the callbacks if the window has
+                              // navigated away. It is optional only as legacy.
+                              optional unsigned long long innerWindowID = 0,
+                              // The callID is needed in case of multiple
+                              // concurrent requests to find the right one.
+                              // It is optional only as legacy.
+                              // TODO: Rewrite to not need this method anymore,
+                              // now that devices are enumerated earlier.
+                              optional DOMString callID = "");
+};
+
+// Service Workers/Navigation Controllers
+partial interface Navigator {
+  [Func="ServiceWorkerContainer::IsEnabled", SameObject]
+  readonly attribute ServiceWorkerContainer serviceWorker;
+};
+
+partial interface Navigator {
+  [Throws, Pref="beacon.enabled"]
+  boolean sendBeacon(DOMString url,
+                     optional (ArrayBufferView or Blob or DOMString or FormData)? data = null);
+};
+
+partial interface Navigator {
+  [NewObject, Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist"]
+  readonly attribute LegacyMozTCPSocket mozTCPSocket;
+};
+
+#ifdef NIGHTLY_BUILD
+partial interface Navigator {
+  [Func="Navigator::IsE10sEnabled"]
+  readonly attribute boolean mozE10sEnabled;
+};
+#endif
+
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface NavigatorConcurrentHardware {
+  readonly attribute unsigned long long hardwareConcurrency;
+};
diff --git a/dom/webidl/NetDashboard.webidl b/dom/webidl/NetDashboard.webidl
new file mode 100644
index 000000000..12bbb01f0
--- /dev/null
+++ b/dom/webidl/NetDashboard.webidl
@@ -0,0 +1,77 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+dictionary SocketElement {
+  DOMString host = "";
+  unsigned long port = 0;
+  boolean active = false;
+  boolean tcp = false;
+  double sent = 0;
+  double received = 0;
+};
+
+dictionary SocketsDict {
+  sequence<SocketElement> sockets;
+  double sent = 0;
+  double received = 0;
+};
+
+dictionary HttpConnInfo {
+  unsigned long rtt = 0;
+  unsigned long ttl = 0;
+  DOMString protocolVersion = "";
+};
+
+dictionary HalfOpenInfoDict {
+  boolean speculative = false;
+};
+
+dictionary HttpConnectionElement {
+  DOMString host = "";
+  unsigned long port = 0;
+  boolean spdy = false;
+  boolean ssl = false;
+  sequence<HttpConnInfo> active;
+  sequence<HttpConnInfo> idle;
+  sequence<HalfOpenInfoDict> halfOpens;
+};
+
+dictionary HttpConnDict {
+  sequence<HttpConnectionElement> connections;
+};
+
+dictionary WebSocketElement {
+  DOMString hostport = "";
+  unsigned long msgsent = 0;
+  unsigned long msgreceived = 0;
+  double sentsize = 0;
+  double receivedsize = 0;
+  boolean encrypted = false;
+};
+
+dictionary WebSocketDict {
+  sequence<WebSocketElement> websockets;
+};
+
+dictionary DnsCacheEntry {
+  DOMString hostname = "";
+  sequence<DOMString> hostaddr;
+  DOMString family = "";
+  double expiration = 0;
+};
+
+dictionary DNSCacheDict {
+  sequence<DnsCacheEntry> entries;
+};
+
+dictionary DNSLookupDict {
+  sequence<DOMString> address;
+  DOMString error = "";
+  boolean answer = false;
+};
+
+dictionary ConnStatusDict {
+  DOMString status = "";
+};
diff --git a/dom/webidl/NetworkInformation.webidl b/dom/webidl/NetworkInformation.webidl
new file mode 100644
index 000000000..3ad203af6
--- /dev/null
+++ b/dom/webidl/NetworkInformation.webidl
@@ -0,0 +1,25 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is https://w3c.github.io/netinfo/
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum ConnectionType {
+    "cellular",
+    "bluetooth",
+    "ethernet",
+    "wifi",
+    "other",
+    "none",
+    "unknown"
+};
+
+[Pref="dom.netinfo.enabled"]
+interface NetworkInformation : EventTarget {
+    readonly    attribute ConnectionType type;
+                attribute EventHandler   ontypechange;
+};
diff --git a/dom/webidl/NetworkOptions.webidl b/dom/webidl/NetworkOptions.webidl
new file mode 100644
index 000000000..b313c932d
--- /dev/null
+++ b/dom/webidl/NetworkOptions.webidl
@@ -0,0 +1,109 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+* This dictionary holds the parameters sent to the network worker.
+*/
+dictionary NetworkCommandOptions
+{
+  long id = 0;                        // opaque id.
+  DOMString cmd = "";                 // the command name.
+  DOMString ifname;                   // for "removeNetworkRoute", "setDNS",
+                                      //     "setDefaultRouteAndDNS", "removeDefaultRoute"
+                                      //     "addHostRoute", "removeHostRoute"
+                                      //     "removeHostRoutes".
+  DOMString ip;                       // for "removeNetworkRoute", "setWifiTethering".
+  unsigned long prefixLength;         // for "removeNetworkRoute".
+  DOMString domain;                   // for "setDNS"
+  sequence<DOMString> dnses;          // for "setDNS", "setDefaultRouteAndDNS".
+  DOMString gateway;                  // for "addSecondaryRoute", "removeSecondaryRoute".
+  sequence<DOMString> gateways;       // for "setDefaultRouteAndDNS", "removeDefaultRoute".
+  DOMString mode;                     // for "setWifiOperationMode".
+  boolean report;                     // for "setWifiOperationMode".
+  boolean enabled;                    // for "setDhcpServer".
+  DOMString wifictrlinterfacename;    // for "setWifiTethering".
+  DOMString internalIfname;           // for "setWifiTethering".
+  DOMString externalIfname;           // for "setWifiTethering".
+  boolean enable;                     // for "setWifiTethering".
+  DOMString ssid;                     // for "setWifiTethering".
+  DOMString security;                 // for "setWifiTethering".
+  DOMString key;                      // for "setWifiTethering".
+  DOMString prefix;                   // for "setWifiTethering", "setDhcpServer".
+  DOMString link;                     // for "setWifiTethering", "setDhcpServer".
+  sequence<DOMString> interfaceList;  // for "setWifiTethering".
+  DOMString wifiStartIp;              // for "setWifiTethering".
+  DOMString wifiEndIp;                // for "setWifiTethering".
+  DOMString usbStartIp;               // for "setWifiTethering".
+  DOMString usbEndIp;                 // for "setWifiTethering".
+  DOMString dns1;                     // for "setWifiTethering".
+  DOMString dns2;                     // for "setWifiTethering".
+  long long threshold;                // for "setNetworkInterfaceAlarm",
+                                      //     "enableNetworkInterfaceAlarm".
+  DOMString startIp;                  // for "setDhcpServer".
+  DOMString endIp;                    // for "setDhcpServer".
+  DOMString serverIp;                 // for "setDhcpServer".
+  DOMString maskLength;               // for "setDhcpServer".
+  DOMString preInternalIfname;        // for "updateUpStream".
+  DOMString preExternalIfname;        // for "updateUpStream".
+  DOMString curInternalIfname;        // for "updateUpStream".
+  DOMString curExternalIfname;        // for "updateUpStream".
+
+  long ipaddr;                        // for "ifc_configure".
+  long mask;                          // for "ifc_configure".
+  long gateway_long;                  // for "ifc_configure".
+  long dns1_long;                     // for "ifc_configure".
+  long dns2_long;                     // for "ifc_configure".
+
+  long mtu;                           // for "setMtu".
+};
+
+/**
+* This dictionary holds the parameters sent back to NetworkService.js.
+*/
+dictionary NetworkResultOptions
+{
+  long id = 0;                        // opaque id.
+  boolean ret = false;                // for sync command.
+  boolean broadcast = false;          // for netd broadcast message.
+  DOMString topic = "";               // for netd broadcast message.
+  DOMString reason = "";              // for netd broadcast message.
+
+  long resultCode = 0;                // for all commands.
+  DOMString resultReason = "";        // for all commands.
+  boolean error = false;              // for all commands.
+
+  boolean enable = false;             // for "setWifiTethering", "setUSBTethering"
+                                      //     "enableUsbRndis".
+  boolean result = false;             // for "enableUsbRndis".
+  boolean success = false;            // for "setDhcpServer".
+  DOMString curExternalIfname = "";   // for "updateUpStream".
+  DOMString curInternalIfname = "";   // for "updateUpStream".
+
+  DOMString reply = "";               // for "command".
+  DOMString route = "";               // for "ifc_get_default_route".
+  DOMString ipaddr_str = "";          // The following are for the result of
+                                      // dhcp_do_request.
+  DOMString gateway_str = "";
+  DOMString dns1_str = "";
+  DOMString dns2_str = "";
+  DOMString mask_str = "";
+  DOMString server_str = "";
+  DOMString vendor_str = "";
+  long      lease = 0;
+  long      prefixLength = 0;
+  long      mask = 0;
+  long      ipaddr = 0;
+  long      gateway = 0;
+  long      dns1 = 0;
+  long      dns2 = 0;
+  long      server = 0;
+
+  DOMString netId = "";               // for "getNetId".
+
+  sequence<DOMString> interfaceList;  // for "getInterfaceList".
+
+  DOMString flag = "down";            // for "getInterfaceConfig".
+  DOMString macAddr = "";             // for "getInterfaceConfig".
+  DOMString ipAddr = "";              // for "getInterfaceConfig".
+};
diff --git a/dom/webidl/Node.webidl b/dom/webidl/Node.webidl
new file mode 100644
index 000000000..bf2c1c4de
--- /dev/null
+++ b/dom/webidl/Node.webidl
@@ -0,0 +1,120 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface Principal;
+interface URI;
+
+interface Node : EventTarget {
+  const unsigned short ELEMENT_NODE = 1;
+  const unsigned short ATTRIBUTE_NODE = 2; // historical
+  const unsigned short TEXT_NODE = 3;
+  const unsigned short CDATA_SECTION_NODE = 4; // historical
+  const unsigned short ENTITY_REFERENCE_NODE = 5; // historical
+  const unsigned short ENTITY_NODE = 6; // historical
+  const unsigned short PROCESSING_INSTRUCTION_NODE = 7;
+  const unsigned short COMMENT_NODE = 8;
+  const unsigned short DOCUMENT_NODE = 9;
+  const unsigned short DOCUMENT_TYPE_NODE = 10;
+  const unsigned short DOCUMENT_FRAGMENT_NODE = 11;
+  const unsigned short NOTATION_NODE = 12; // historical
+  [Constant]
+  readonly attribute unsigned short nodeType;
+  [Pure]
+  readonly attribute DOMString nodeName;
+
+  [Pure, Throws]
+  readonly attribute DOMString? baseURI;
+
+  [Pure, BinaryName=getComposedDoc]
+  readonly attribute boolean isConnected;
+  [Pure]
+  readonly attribute Document? ownerDocument;
+  [Pure, Pref="dom.getRootNode.enabled"]
+  Node getRootNode(optional GetRootNodeOptions options);
+  [Pure]
+  readonly attribute Node? parentNode;
+  [Pure]
+  readonly attribute Element? parentElement;
+  [Pure]
+  boolean hasChildNodes();
+  [SameObject]
+  readonly attribute NodeList childNodes;
+  [Pure]
+  readonly attribute Node? firstChild;
+  [Pure]
+  readonly attribute Node? lastChild;
+  [Pure]
+  readonly attribute Node? previousSibling;
+  [Pure]
+  readonly attribute Node? nextSibling;
+
+  [CEReactions, SetterThrows, Pure]
+           attribute DOMString? nodeValue;
+  [CEReactions, Throws, Pure]
+           attribute DOMString? textContent;
+  [CEReactions, Throws]
+  Node insertBefore(Node node, Node? child);
+  [CEReactions, Throws]
+  Node appendChild(Node node);
+  [CEReactions, Throws]
+  Node replaceChild(Node node, Node child);
+  [CEReactions, Throws]
+  Node removeChild(Node child);
+  void normalize();
+
+  [CEReactions, Throws]
+  Node cloneNode(optional boolean deep = false);
+  [Pure]
+  boolean isSameNode(Node? node);
+  [Pure]
+  boolean isEqualNode(Node? node);
+
+  const unsigned short DOCUMENT_POSITION_DISCONNECTED = 0x01;
+  const unsigned short DOCUMENT_POSITION_PRECEDING = 0x02;
+  const unsigned short DOCUMENT_POSITION_FOLLOWING = 0x04;
+  const unsigned short DOCUMENT_POSITION_CONTAINS = 0x08;
+  const unsigned short DOCUMENT_POSITION_CONTAINED_BY = 0x10;
+  const unsigned short DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC = 0x20; // historical
+  [Pure]
+  unsigned short compareDocumentPosition(Node other);
+  [Pure]
+  boolean contains(Node? other);
+
+  [Pure]
+  DOMString? lookupPrefix(DOMString? namespace);
+  [Pure]
+  DOMString? lookupNamespaceURI(DOMString? prefix);
+  [Pure]
+  boolean isDefaultNamespace(DOMString? namespace);
+
+  // Mozilla-specific stuff
+  [Throws, Func="IsChromeOrXBL"]
+  any setUserData(DOMString key, any data);
+  [Throws, Func="IsChromeOrXBL"]
+  any getUserData(DOMString key);
+  [ChromeOnly]
+  readonly attribute Principal nodePrincipal;
+  [ChromeOnly]
+  readonly attribute URI? baseURIObject;
+  [ChromeOnly]
+  sequence<MutationObserver> getBoundMutationObservers();
+
+#ifdef ACCESSIBILITY
+  [Pref="accessibility.AOM.enabled"]
+  readonly attribute AccessibleNode? accessibleNode;
+#endif
+};
+
+dictionary GetRootNodeOptions {
+  boolean composed = false;
+};
+
diff --git a/dom/webidl/NodeFilter.webidl b/dom/webidl/NodeFilter.webidl
new file mode 100644
index 000000000..6da959dc9
--- /dev/null
+++ b/dom/webidl/NodeFilter.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#interface-nodefilter
+ */
+
+callback interface NodeFilter {
+  // Constants for acceptNode()
+  const unsigned short FILTER_ACCEPT = 1;
+  const unsigned short FILTER_REJECT = 2;
+  const unsigned short FILTER_SKIP = 3;
+
+  // Constants for whatToShow
+  const unsigned long SHOW_ALL = 0xFFFFFFFF;
+  const unsigned long SHOW_ELEMENT = 0x1;
+  const unsigned long SHOW_ATTRIBUTE = 0x2; // historical
+  const unsigned long SHOW_TEXT = 0x4;
+  const unsigned long SHOW_CDATA_SECTION = 0x8; // historical
+  const unsigned long SHOW_ENTITY_REFERENCE = 0x10; // historical
+  const unsigned long SHOW_ENTITY = 0x20; // historical
+  const unsigned long SHOW_PROCESSING_INSTRUCTION = 0x40;
+  const unsigned long SHOW_COMMENT = 0x80;
+  const unsigned long SHOW_DOCUMENT = 0x100;
+  const unsigned long SHOW_DOCUMENT_TYPE = 0x200;
+  const unsigned long SHOW_DOCUMENT_FRAGMENT = 0x400;
+  const unsigned long SHOW_NOTATION = 0x800; // historical
+
+  unsigned short acceptNode(Node node);
+};
diff --git a/dom/webidl/NodeIterator.webidl b/dom/webidl/NodeIterator.webidl
new file mode 100644
index 000000000..201b382a0
--- /dev/null
+++ b/dom/webidl/NodeIterator.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface NodeIterator {
+  [Constant]
+  readonly attribute Node root;
+  [Pure]
+  readonly attribute Node? referenceNode;
+  [Pure]
+  readonly attribute boolean pointerBeforeReferenceNode;
+  [Constant]
+  readonly attribute unsigned long whatToShow;
+  [Constant]
+  readonly attribute NodeFilter? filter;
+
+  [Throws]
+  Node? nextNode();
+  [Throws]
+  Node? previousNode();
+
+  void detach();
+};
diff --git a/dom/webidl/NodeList.webidl b/dom/webidl/NodeList.webidl
new file mode 100644
index 000000000..d6c981e11
--- /dev/null
+++ b/dom/webidl/NodeList.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface NodeList {
+  getter Node? item(unsigned long index);
+  readonly attribute unsigned long length;
+  iterable<Node?>;
+};
diff --git a/dom/webidl/Notification.webidl b/dom/webidl/Notification.webidl
new file mode 100644
index 000000000..7a55a52ae
--- /dev/null
+++ b/dom/webidl/Notification.webidl
@@ -0,0 +1,105 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://notifications.spec.whatwg.org/
+ *
+ * Copyright:
+ * To the extent possible under law, the editors have waived all copyright and
+ * related or neighboring rights to this work.
+ */
+
+[Constructor(DOMString title, optional NotificationOptions options),
+ Exposed=(Window,Worker),
+ Func="mozilla::dom::Notification::PrefEnabled",
+ UnsafeInPrerendering]
+interface Notification : EventTarget {
+  [GetterThrows]
+  static readonly attribute NotificationPermission permission;
+
+  [Throws, Func="mozilla::dom::Notification::RequestPermissionEnabledForScope"]
+  static Promise<NotificationPermission> requestPermission(optional NotificationPermissionCallback permissionCallback);
+
+  [Throws, Func="mozilla::dom::Notification::IsGetEnabled"]
+  static Promise<sequence<Notification>> get(optional GetNotificationOptions filter);
+
+  attribute EventHandler onclick;
+
+  attribute EventHandler onshow;
+
+  attribute EventHandler onerror;
+
+  attribute EventHandler onclose;
+
+  [Pure]
+  readonly attribute DOMString title;
+
+  [Pure]
+  readonly attribute NotificationDirection dir;
+
+  [Pure]
+  readonly attribute DOMString? lang;
+
+  [Pure]
+  readonly attribute DOMString? body;
+
+  [Constant]
+  readonly attribute DOMString? tag;
+
+  [Pure]
+  readonly attribute DOMString? icon;
+
+  [Constant, Func="mozilla::dom::Notification::RequireInteractionEnabled"]
+  readonly attribute boolean requireInteraction;
+
+  [Constant]
+  readonly attribute any data;
+
+  void close();
+};
+
+dictionary NotificationOptions {
+  NotificationDirection dir = "auto";
+  DOMString lang = "";
+  DOMString body = "";
+  DOMString tag = "";
+  DOMString icon = "";
+  boolean requireInteraction = false;
+  any data = null;
+  NotificationBehavior mozbehavior = null;
+};
+
+dictionary GetNotificationOptions {
+  DOMString tag = "";
+};
+
+dictionary NotificationBehavior {
+  boolean noscreen = false;
+  boolean noclear = false;
+  boolean showOnlyOnce = false;
+  DOMString soundFile = "";
+  sequence<unsigned long> vibrationPattern;
+};
+
+enum NotificationPermission {
+  "default",
+  "denied",
+  "granted"
+};
+
+callback NotificationPermissionCallback = void (NotificationPermission permission);
+
+enum NotificationDirection {
+  "auto",
+  "ltr",
+  "rtl"
+};
+
+partial interface ServiceWorkerRegistration {
+  [Throws, Func="mozilla::dom::ServiceWorkerRegistration::NotificationAPIVisible"]
+  Promise<void> showNotification(DOMString title, optional NotificationOptions options);
+  [Throws, Func="mozilla::dom::ServiceWorkerRegistration::NotificationAPIVisible"]
+  Promise<sequence<Notification>> getNotifications(optional GetNotificationOptions filter);
+};
diff --git a/dom/webidl/NotificationEvent.webidl b/dom/webidl/NotificationEvent.webidl
new file mode 100644
index 000000000..3f25cf1b8
--- /dev/null
+++ b/dom/webidl/NotificationEvent.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://notifications.spec.whatwg.org/
+ *
+ * Copyright:
+ * To the extent possible under law, the editors have waived all copyright and
+ * related or neighboring rights to this work.
+ */
+
+[Constructor(DOMString type, NotificationEventInit eventInitDict),
+ Exposed=ServiceWorker,Func="mozilla::dom::Notification::PrefEnabled"]
+interface NotificationEvent : ExtendableEvent {
+  readonly attribute Notification notification;
+};
+
+dictionary NotificationEventInit : ExtendableEventInit {
+  required Notification notification;
+};
+
+partial interface ServiceWorkerGlobalScope {
+  attribute EventHandler onnotificationclick;
+  attribute EventHandler onnotificationclose;
+};
diff --git a/dom/webidl/NotifyPaintEvent.webidl b/dom/webidl/NotifyPaintEvent.webidl
new file mode 100644
index 000000000..799abbb29
--- /dev/null
+++ b/dom/webidl/NotifyPaintEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information about this interface see nsIDOMNotifyPaintEvent.idl
+ */
+
+interface NotifyPaintEvent : Event
+{
+  readonly attribute DOMRectList clientRects;
+
+  readonly attribute DOMRect boundingClientRect;
+
+  readonly attribute PaintRequestList paintRequests;
+
+  readonly attribute unsigned long long transactionId;
+};
diff --git a/dom/webidl/OfflineAudioCompletionEvent.webidl b/dom/webidl/OfflineAudioCompletionEvent.webidl
new file mode 100644
index 000000000..0203bfa10
--- /dev/null
+++ b/dom/webidl/OfflineAudioCompletionEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface OfflineAudioCompletionEvent : Event {
+
+    readonly attribute AudioBuffer renderedBuffer;
+
+};
+
diff --git a/dom/webidl/OfflineAudioContext.webidl b/dom/webidl/OfflineAudioContext.webidl
new file mode 100644
index 000000000..51dc683f7
--- /dev/null
+++ b/dom/webidl/OfflineAudioContext.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(unsigned long numberOfChannels, unsigned long length, float sampleRate),
+Pref="dom.webaudio.enabled"]
+interface OfflineAudioContext : AudioContext {
+
+    [Throws]
+    Promise<AudioBuffer> startRendering();
+
+    attribute EventHandler oncomplete;
+    readonly attribute unsigned long length;
+
+};
diff --git a/dom/webidl/OfflineResourceList.webidl b/dom/webidl/OfflineResourceList.webidl
new file mode 100644
index 000000000..abc511888
--- /dev/null
+++ b/dom/webidl/OfflineResourceList.webidl
@@ -0,0 +1,116 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface OfflineResourceList : EventTarget {
+  /**
+   * State of the application cache this object is associated with.
+   */
+
+  /* This object is not associated with an application cache. */
+  const unsigned short UNCACHED = 0;
+
+  /* The application cache is not being updated. */
+  const unsigned short IDLE = 1;
+
+  /* The manifest is being fetched and checked for updates */
+  const unsigned short CHECKING = 2;
+
+  /* Resources are being downloaded to be added to the cache */
+  const unsigned short DOWNLOADING = 3;
+
+  /* There is a new version of the application cache available */
+  const unsigned short UPDATEREADY = 4;
+
+  /* The application cache group is now obsolete. */
+  const unsigned short OBSOLETE = 5;
+
+  [Throws, UseCounter]
+  readonly attribute unsigned short status;
+
+  /**
+   * Begin the application update process on the associated application cache.
+   */
+  [Throws, UseCounter]
+  void update();
+
+  /**
+   * Swap in the newest version of the application cache, or disassociate
+   * from the cache if the cache group is obsolete.
+   */
+  [Throws, UseCounter]
+  void swapCache();
+
+  /* Events */
+  [UseCounter]
+  attribute EventHandler onchecking;
+  [UseCounter]
+  attribute EventHandler onerror;
+  [UseCounter]
+  attribute EventHandler onnoupdate;
+  [UseCounter]
+  attribute EventHandler ondownloading;
+  [UseCounter]
+  attribute EventHandler onprogress;
+  [UseCounter]
+  attribute EventHandler onupdateready;
+  [UseCounter]
+  attribute EventHandler oncached;
+  [UseCounter]
+  attribute EventHandler onobsolete;
+};
+
+// Mozilla extensions.
+partial interface OfflineResourceList {
+  /**
+   * Get the list of dynamically-managed entries.
+   */
+  [Throws]
+  readonly attribute DOMStringList mozItems;
+
+  /**
+   * Check that an entry exists in the list of dynamically-managed entries.
+   *
+   * @param uri
+   *        The resource to check.
+   */
+  [Throws]
+  boolean mozHasItem(DOMString uri);
+
+  /**
+   * Get the number of dynamically-managed entries.
+   * @status DEPRECATED
+   *         Clients should use the "items" attribute.
+   */
+  [Throws]
+  readonly attribute unsigned long mozLength;
+
+  /**
+   * Get the URI of a dynamically-managed entry.
+   * @status DEPRECATED
+   *         Clients should use the "items" attribute.
+   */
+  [Throws]
+  getter DOMString mozItem(unsigned long index);
+
+  /**
+   * Add an item to the list of dynamically-managed entries.  The resource
+   * will be fetched into the application cache.
+   *
+   * @param uri
+   *        The resource to add.
+   */
+  [Throws]
+  void mozAdd(DOMString uri);
+
+  /**
+   * Remove an item from the list of dynamically-managed entries.  If this
+   * was the last reference to a URI in the application cache, the cache
+   * entry will be removed.
+   *
+   * @param uri
+   *        The resource to remove.
+   */
+  [Throws]
+  void mozRemove(DOMString uri);
+};
diff --git a/dom/webidl/OffscreenCanvas.webidl b/dom/webidl/OffscreenCanvas.webidl
new file mode 100644
index 000000000..ffe2b9147
--- /dev/null
+++ b/dom/webidl/OffscreenCanvas.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * https://wiki.whatwg.org/wiki/OffscreenCanvas
+ */
+
+[Constructor(unsigned long width, unsigned long height),
+ Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabled"]
+interface OffscreenCanvas : EventTarget {
+  [Pure, SetterThrows]
+  attribute unsigned long width;
+  [Pure, SetterThrows]
+  attribute unsigned long height;
+
+  [Throws]
+  nsISupports? getContext(DOMString contextId,
+                          optional any contextOptions = null);
+
+  ImageBitmap transferToImageBitmap();
+  [Throws]
+  Promise<Blob> toBlob(optional DOMString type = "",
+                       optional any encoderOptions);
+};
+
+// OffscreenCanvas implements Transferable;
diff --git a/dom/webidl/OscillatorNode.webidl b/dom/webidl/OscillatorNode.webidl
new file mode 100644
index 000000000..268897080
--- /dev/null
+++ b/dom/webidl/OscillatorNode.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum OscillatorType {
+  "sine",
+  "square",
+  "sawtooth",
+  "triangle",
+  "custom"
+};
+
+[Pref="dom.webaudio.enabled"]
+interface OscillatorNode : AudioNode {
+
+    [SetterThrows]
+    attribute OscillatorType type;
+
+    readonly attribute AudioParam frequency; // in Hertz
+    readonly attribute AudioParam detune; // in Cents
+
+    [Throws, UnsafeInPrerendering]
+    void start(optional double when = 0);
+    [Throws, UnsafeInPrerendering]
+    void stop(optional double when = 0);
+    void setPeriodicWave(PeriodicWave periodicWave);
+
+    attribute EventHandler onended;
+
+};
+
+// Mozilla extensions
+OscillatorNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/PageTransitionEvent.webidl b/dom/webidl/PageTransitionEvent.webidl
new file mode 100644
index 000000000..d4a050c19
--- /dev/null
+++ b/dom/webidl/PageTransitionEvent.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * The PageTransitionEvent interface is used for the pageshow and
+ * pagehide events, which are generic events that apply to both page
+ * load/unload and saving/restoring a document from session history.
+ */
+
+[Constructor(DOMString type, optional PageTransitionEventInit eventInitDict)]
+interface PageTransitionEvent : Event
+{
+  /**
+   * Set to true if the document has been or will be persisted across
+   * firing of the event.  For example, if a document is being cached in
+   * session history, |persisted| is true for the PageHide event.
+   */
+  readonly attribute boolean persisted;
+};
+
+dictionary PageTransitionEventInit : EventInit
+{
+  boolean persisted = false;
+};
diff --git a/dom/webidl/PaintRequest.webidl b/dom/webidl/PaintRequest.webidl
new file mode 100644
index 000000000..065be0866
--- /dev/null
+++ b/dom/webidl/PaintRequest.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * These objects are exposed by the MozDOMAfterPaint event. Each one represents
+ * a request to repaint a rectangle that was generated by the browser.
+ */
+interface PaintRequest {
+  /**
+   * The client rect where invalidation was triggered.
+   */
+  readonly attribute DOMRect clientRect;
+
+  /**
+   * The reason for the request, as a string. If an empty string, then we don't know
+   * the reason (this is common). Reasons include "scroll repaint", meaning that we
+   * needed to repaint the rectangle due to scrolling, and "scroll copy", meaning
+   * that we updated the rectangle due to scrolling but instead of painting
+   * manually, we were able to do a copy from another area of the screen.
+   */
+  readonly attribute DOMString reason;
+};
diff --git a/dom/webidl/PaintRequestList.webidl b/dom/webidl/PaintRequestList.webidl
new file mode 100644
index 000000000..d14f18a73
--- /dev/null
+++ b/dom/webidl/PaintRequestList.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface PaintRequestList {
+  readonly attribute unsigned long length;
+  getter PaintRequest? item(unsigned long index);
+};
diff --git a/dom/webidl/PannerNode.webidl b/dom/webidl/PannerNode.webidl
new file mode 100644
index 000000000..86b892852
--- /dev/null
+++ b/dom/webidl/PannerNode.webidl
@@ -0,0 +1,61 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum PanningModelType {
+  "equalpower",
+  "HRTF"
+};
+
+enum DistanceModelType {
+  "linear",
+  "inverse",
+  "exponential"
+};
+
+[Pref="dom.webaudio.enabled"]
+interface PannerNode : AudioNode {
+
+    // Default for stereo is equalpower
+    attribute PanningModelType panningModel;
+
+    // Uses a 3D cartesian coordinate system
+    void setPosition(double x, double y, double z);
+    void setOrientation(double x, double y, double z);
+    [Deprecated="PannerNodeDoppler"]
+    void setVelocity(double x, double y, double z);
+
+    // Cartesian coordinate for position
+    readonly attribute AudioParam positionX;
+    readonly attribute AudioParam positionY;
+    readonly attribute AudioParam positionZ;
+
+    // Cartesian coordinate for orientation
+    readonly attribute AudioParam orientationX;
+    readonly attribute AudioParam orientationY;
+    readonly attribute AudioParam orientationZ;
+
+    // Distance model and attributes
+    attribute DistanceModelType distanceModel;
+    attribute double refDistance;
+    attribute double maxDistance;
+    attribute double rolloffFactor;
+
+    // Directional sound cone
+    attribute double coneInnerAngle;
+    attribute double coneOuterAngle;
+    attribute double coneOuterGain;
+
+};
+
+// Mozilla extension
+PannerNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/ParentNode.webidl b/dom/webidl/ParentNode.webidl
new file mode 100644
index 000000000..aa6ca5db2
--- /dev/null
+++ b/dom/webidl/ParentNode.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#interface-parentnode
+ */
+
+[NoInterfaceObject]
+interface ParentNode {
+  [Constant]
+  readonly attribute HTMLCollection children;
+  [Pure]
+  readonly attribute Element? firstElementChild;
+  [Pure]
+  readonly attribute Element? lastElementChild;
+  [Pure]
+  readonly attribute unsigned long childElementCount;
+
+  [CEReactions, Throws, Unscopable]
+  void prepend((Node or DOMString)... nodes);
+  [CEReactions, Throws, Unscopable]
+  void append((Node or DOMString)... nodes);
+};
diff --git a/dom/webidl/Performance.webidl b/dom/webidl/Performance.webidl
new file mode 100644
index 000000000..e811e1cee
--- /dev/null
+++ b/dom/webidl/Performance.webidl
@@ -0,0 +1,79 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://w3c.github.io/hr-time/
+ *
+ * Copyright © 2015 W3C® (MIT, ERCIM, Keio, Beihang).
+ * W3C liability, trademark and document use rules apply.
+ */
+
+typedef double DOMHighResTimeStamp;
+typedef sequence <PerformanceEntry> PerformanceEntryList;
+
+[Exposed=(Window,Worker)]
+interface Performance {
+  [DependsOn=DeviceState, Affects=Nothing]
+  DOMHighResTimeStamp now();
+
+  [Constant]
+  readonly attribute DOMHighResTimeStamp timeOrigin;
+};
+
+[Exposed=Window]
+partial interface Performance {
+  [Constant]
+  readonly attribute PerformanceTiming timing;
+  [Constant]
+  readonly attribute PerformanceNavigation navigation;
+
+  jsonifier;
+};
+
+// http://www.w3.org/TR/performance-timeline/#sec-window.performance-attribute
+[Exposed=(Window,Worker)]
+partial interface Performance {
+  [Func="Performance::IsEnabled"]
+  PerformanceEntryList getEntries();
+  [Func="Performance::IsEnabled"]
+  PerformanceEntryList getEntriesByType(DOMString entryType);
+  [Func="Performance::IsEnabled"]
+  PerformanceEntryList getEntriesByName(DOMString name, optional DOMString
+    entryType);
+};
+
+// http://www.w3.org/TR/resource-timing/#extensions-performance-interface
+[Exposed=Window]
+partial interface Performance {
+  [Func="Performance::IsEnabled"]
+  void clearResourceTimings();
+  [Func="Performance::IsEnabled"]
+  void setResourceTimingBufferSize(unsigned long maxSize);
+  [Func="Performance::IsEnabled"]
+  attribute EventHandler onresourcetimingbufferfull;
+};
+
+#ifdef MOZ_DEVTOOLS_SERVER
+// GC microbenchmarks, pref-guarded, not for general use (bug 1125412)
+[Exposed=Window]
+partial interface Performance {
+  [Pref="dom.enable_memory_stats"]
+  readonly attribute object mozMemory;
+};
+#endif
+
+// http://www.w3.org/TR/user-timing/
+[Exposed=(Window,Worker)]
+partial interface Performance {
+  [Func="Performance::IsEnabled", Throws]
+  void mark(DOMString markName);
+  [Func="Performance::IsEnabled"]
+  void clearMarks(optional DOMString markName);
+  [Func="Performance::IsEnabled", Throws]
+  void measure(DOMString measureName, optional DOMString startMark, optional DOMString endMark);
+  [Func="Performance::IsEnabled"]
+  void clearMeasures(optional DOMString measureName);
+};
+
diff --git a/dom/webidl/PerformanceEntry.webidl b/dom/webidl/PerformanceEntry.webidl
new file mode 100644
index 000000000..6cc37b845
--- /dev/null
+++ b/dom/webidl/PerformanceEntry.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3c-test.org/webperf/specs/PerformanceTimeline/#sec-PerformanceEntry-interface
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,Worker)]
+interface PerformanceEntry
+{
+  readonly attribute DOMString name;
+  readonly attribute DOMString entryType;
+  readonly attribute DOMHighResTimeStamp startTime;
+  readonly attribute DOMHighResTimeStamp duration;
+
+  jsonifier;
+};
diff --git a/dom/webidl/PerformanceEntryEvent.webidl b/dom/webidl/PerformanceEntryEvent.webidl
new file mode 100644
index 000000000..2cf75c5e4
--- /dev/null
+++ b/dom/webidl/PerformanceEntryEvent.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+dictionary PerformanceEntryEventInit : EventInit
+{
+  DOMString name = "";
+  DOMString entryType = "";
+  DOMHighResTimeStamp startTime = 0;
+  DOMHighResTimeStamp duration = 0;
+  double epoch = 0;
+  DOMString origin = "";
+};
+
+[Constructor(DOMString type, optional PerformanceEntryEventInit eventInitDict),
+ ChromeOnly]
+interface PerformanceEntryEvent : Event
+{
+  readonly attribute DOMString name;
+  readonly attribute DOMString entryType;
+  readonly attribute DOMHighResTimeStamp startTime;
+  readonly attribute DOMHighResTimeStamp duration;
+  readonly attribute double epoch;
+  readonly attribute DOMString origin;
+};
diff --git a/dom/webidl/PerformanceMark.webidl b/dom/webidl/PerformanceMark.webidl
new file mode 100644
index 000000000..20e9e92c0
--- /dev/null
+++ b/dom/webidl/PerformanceMark.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/user-timing/#performancemark
+ */
+
+[Exposed=(Window,Worker)]
+interface PerformanceMark : PerformanceEntry
+{
+};
diff --git a/dom/webidl/PerformanceMeasure.webidl b/dom/webidl/PerformanceMeasure.webidl
new file mode 100644
index 000000000..aa4e8cd25
--- /dev/null
+++ b/dom/webidl/PerformanceMeasure.webidl
@@ -0,0 +1,13 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/user-timing/#performancemeasure
+ */
+
+[Exposed=(Window,Worker)]
+interface PerformanceMeasure : PerformanceEntry
+{
+};
diff --git a/dom/webidl/PerformanceNavigation.webidl b/dom/webidl/PerformanceNavigation.webidl
new file mode 100644
index 000000000..771cf7e98
--- /dev/null
+++ b/dom/webidl/PerformanceNavigation.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/hr-time/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface PerformanceNavigation {
+  const unsigned short TYPE_NAVIGATE = 0;
+  const unsigned short TYPE_RELOAD = 1;
+  const unsigned short TYPE_BACK_FORWARD = 2;
+  const unsigned short TYPE_RESERVED = 255;
+
+  readonly attribute unsigned short type;
+  readonly attribute unsigned short redirectCount;
+
+  jsonifier;
+};
diff --git a/dom/webidl/PerformanceNavigationTiming.webidl b/dom/webidl/PerformanceNavigationTiming.webidl
new file mode 100644
index 000000000..fa3ecaec4
--- /dev/null
+++ b/dom/webidl/PerformanceNavigationTiming.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://www.w3.org/TR/navigation-timing-2/#sec-PerformanceNavigationTiming
+ *
+ * Copyright © 2016 W3C® (MIT, ERCIM, Keio, Beihang).
+ * W3C liability, trademark and document use rules apply.
+ */
+
+enum NavigationType {
+  "navigate",
+  "reload",
+  "back_forward",
+  "prerender"
+};
+
+interface PerformanceNavigationTiming : PerformanceResourceTiming {
+  readonly        attribute DOMHighResTimeStamp unloadEventStart;
+  readonly        attribute DOMHighResTimeStamp unloadEventEnd;
+  readonly        attribute DOMHighResTimeStamp domInteractive;
+  readonly        attribute DOMHighResTimeStamp domContentLoadedEventStart;
+  readonly        attribute DOMHighResTimeStamp domContentLoadedEventEnd;
+  readonly        attribute DOMHighResTimeStamp domComplete;
+  readonly        attribute DOMHighResTimeStamp loadEventStart;
+  readonly        attribute DOMHighResTimeStamp loadEventEnd;
+  readonly        attribute NavigationType      type;
+  readonly        attribute unsigned short      redirectCount;
+
+  jsonifier;
+};
diff --git a/dom/webidl/PerformanceObserver.webidl b/dom/webidl/PerformanceObserver.webidl
new file mode 100644
index 000000000..4cebecbeb
--- /dev/null
+++ b/dom/webidl/PerformanceObserver.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/performance-timeline/#the-performanceobserver-interface
+ */
+
+dictionary PerformanceObserverInit {
+  required sequence<DOMString> entryTypes;
+  boolean buffered = false;
+};
+
+callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
+
+[Func="Performance::IsObserverEnabled",
+ Constructor(PerformanceObserverCallback callback),
+ Exposed=(Window,Worker)]
+interface PerformanceObserver {
+  [Throws]
+  void observe(PerformanceObserverInit options);
+  void disconnect();
+};
diff --git a/dom/webidl/PerformanceObserverEntryList.webidl b/dom/webidl/PerformanceObserverEntryList.webidl
new file mode 100644
index 000000000..cff4ee1b0
--- /dev/null
+++ b/dom/webidl/PerformanceObserverEntryList.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/performance-timeline/#the-performanceobserverentrylist-interface
+ */
+
+// XXX should be moved into Performance.webidl.
+dictionary PerformanceEntryFilterOptions {
+  DOMString name;
+  DOMString entryType;
+  DOMString initiatorType;
+};
+
+[Func="Performance::IsObserverEnabled", Exposed=(Window,Worker)]
+interface PerformanceObserverEntryList {
+  PerformanceEntryList getEntries(optional PerformanceEntryFilterOptions filter);
+  PerformanceEntryList getEntriesByType(DOMString entryType);
+  PerformanceEntryList getEntriesByName(DOMString name,
+                                        optional DOMString entryType);
+};
+
diff --git a/dom/webidl/PerformanceResourceTiming.webidl b/dom/webidl/PerformanceResourceTiming.webidl
new file mode 100644
index 000000000..112228325
--- /dev/null
+++ b/dom/webidl/PerformanceResourceTiming.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/resource-timing/#performanceresourcetiming
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface PerformanceResourceTiming : PerformanceEntry
+{
+  readonly attribute DOMString initiatorType;
+  readonly attribute DOMString nextHopProtocol;
+
+  readonly attribute DOMHighResTimeStamp workerStart;
+  readonly attribute DOMHighResTimeStamp redirectStart;
+  readonly attribute DOMHighResTimeStamp redirectEnd;
+  readonly attribute DOMHighResTimeStamp fetchStart;
+  readonly attribute DOMHighResTimeStamp domainLookupStart;
+  readonly attribute DOMHighResTimeStamp domainLookupEnd;
+  readonly attribute DOMHighResTimeStamp connectStart;
+  readonly attribute DOMHighResTimeStamp connectEnd;
+  readonly attribute DOMHighResTimeStamp secureConnectionStart;
+  readonly attribute DOMHighResTimeStamp requestStart;
+  readonly attribute DOMHighResTimeStamp responseStart;
+  readonly attribute DOMHighResTimeStamp responseEnd;
+
+  readonly attribute unsigned long long transferSize;
+  readonly attribute unsigned long long encodedBodySize;
+  readonly attribute unsigned long long decodedBodySize;
+
+  jsonifier;
+};
diff --git a/dom/webidl/PerformanceTiming.webidl b/dom/webidl/PerformanceTiming.webidl
new file mode 100644
index 000000000..4aa403a50
--- /dev/null
+++ b/dom/webidl/PerformanceTiming.webidl
@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/hr-time/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface PerformanceTiming {
+  readonly attribute unsigned long long navigationStart;
+  readonly attribute unsigned long long unloadEventStart;
+  readonly attribute unsigned long long unloadEventEnd;
+  readonly attribute unsigned long long redirectStart;
+  readonly attribute unsigned long long redirectEnd;
+  readonly attribute unsigned long long fetchStart;
+  readonly attribute unsigned long long domainLookupStart;
+  readonly attribute unsigned long long domainLookupEnd;
+  readonly attribute unsigned long long connectStart;
+  readonly attribute unsigned long long connectEnd;
+  readonly attribute unsigned long long secureConnectionStart;
+  readonly attribute unsigned long long requestStart;
+  readonly attribute unsigned long long responseStart;
+  readonly attribute unsigned long long responseEnd;
+  readonly attribute unsigned long long domLoading;
+  readonly attribute unsigned long long domInteractive;
+  readonly attribute unsigned long long domContentLoadedEventStart;
+  readonly attribute unsigned long long domContentLoadedEventEnd;
+  readonly attribute unsigned long long domComplete;
+  readonly attribute unsigned long long loadEventStart;
+  readonly attribute unsigned long long loadEventEnd;
+
+  // This is a Chrome proprietary extension and not part of the
+  // performance/navigation timing specification.
+  // Returns 0 if a non-blank paint has not happened.
+  [Pref="dom.performance.time_to_non_blank_paint.enabled"]
+  readonly attribute unsigned long long timeToNonBlankPaint;
+
+  jsonifier;
+};
diff --git a/dom/webidl/PeriodicWave.webidl b/dom/webidl/PeriodicWave.webidl
new file mode 100644
index 000000000..c118274a2
--- /dev/null
+++ b/dom/webidl/PeriodicWave.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface PeriodicWave {
+
+};
+
diff --git a/dom/webidl/PermissionSettings.webidl b/dom/webidl/PermissionSettings.webidl
new file mode 100644
index 000000000..99101d798
--- /dev/null
+++ b/dom/webidl/PermissionSettings.webidl
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain at http://mozilla.org/MPL/2.0/. */
+
+[JSImplementation="@mozilla.org/permissionSettings;1",
+ ChromeOnly,
+ Pref="dom.mozPermissionSettings.enabled",
+ NavigatorProperty="mozPermissionSettings"]
+interface PermissionSettings
+{
+  DOMString get(DOMString permission, DOMString manifestURI, DOMString origin, boolean browserFlag);
+
+  void set(DOMString permission, DOMString value, DOMString manifestURI, DOMString origin, boolean browserFlag);
+
+  boolean isExplicit(DOMString permission, DOMString manifestURI, DOMString origin, boolean browserFlag);
+
+  // Removing a permission is only allowed for pages with a different origin than the app
+  // and pages that have browserFlag=true, so remove() doesn't have a browserFlag parameter.
+  void remove(DOMString permission, DOMString manifestURI, DOMString origin);
+};
diff --git a/dom/webidl/PermissionStatus.webidl b/dom/webidl/PermissionStatus.webidl
new file mode 100644
index 000000000..3abfd66f4
--- /dev/null
+++ b/dom/webidl/PermissionStatus.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/permissions/#status-of-a-permission
+ */
+
+enum PermissionState {
+  "granted",
+  "denied",
+  "prompt"
+};
+
+[Exposed=(Window)]
+interface PermissionStatus : EventTarget {
+  readonly attribute PermissionState state;
+  attribute EventHandler onchange;
+};
diff --git a/dom/webidl/Permissions.webidl b/dom/webidl/Permissions.webidl
new file mode 100644
index 000000000..a6c8aba68
--- /dev/null
+++ b/dom/webidl/Permissions.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/permissions/#permissions-interface
+ */
+
+enum PermissionName {
+  "geolocation",
+  "notifications",
+  "push"
+  // Unsupported: "midi"
+};
+
+dictionary PermissionDescriptor {
+  required PermissionName name;
+};
+
+// We don't implement `PushPermissionDescriptor` because we use a background
+// message quota instead of `userVisibleOnly`.
+
+[Exposed=(Window)]
+interface Permissions {
+  [Throws]
+  Promise<PermissionStatus> query(object permission);
+  [Throws, Pref="dom.permissions.revoke.enable"]
+  Promise<PermissionStatus> revoke(object permission);
+};
diff --git a/dom/webidl/Plugin.webidl b/dom/webidl/Plugin.webidl
new file mode 100644
index 000000000..018d65a05
--- /dev/null
+++ b/dom/webidl/Plugin.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// [LegacyUnenumerableNamedProperties]
+// Named properties enumerable for now; see
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1270366
+interface Plugin {
+  readonly attribute DOMString description;
+  readonly attribute DOMString filename;
+  readonly attribute DOMString version;
+  readonly attribute DOMString name;
+
+  readonly attribute unsigned long length;
+  getter MimeType? item(unsigned long index);
+  getter MimeType? namedItem(DOMString name);
+};
diff --git a/dom/webidl/PluginArray.webidl b/dom/webidl/PluginArray.webidl
new file mode 100644
index 000000000..617bb1f9a
--- /dev/null
+++ b/dom/webidl/PluginArray.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// [LegacyUnenumerableNamedProperties]
+// Named properties enumerable for now; see
+// https://bugzilla.mozilla.org/show_bug.cgi?id=1270366
+interface PluginArray {
+  readonly attribute unsigned long length;
+
+  getter Plugin? item(unsigned long index);
+  getter Plugin? namedItem(DOMString name);
+
+  void refresh(optional boolean reloadDocuments = false);
+};
diff --git a/dom/webidl/PluginCrashedEvent.webidl b/dom/webidl/PluginCrashedEvent.webidl
new file mode 100644
index 000000000..c94315385
--- /dev/null
+++ b/dom/webidl/PluginCrashedEvent.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional PluginCrashedEventInit eventInitDict), ChromeOnly]
+interface PluginCrashedEvent : Event
+{
+  readonly attribute unsigned long pluginID;
+  readonly attribute DOMString pluginDumpID;
+  readonly attribute DOMString pluginName;
+  readonly attribute DOMString? browserDumpID;
+  readonly attribute DOMString? pluginFilename;
+  readonly attribute boolean submittedCrashReport;
+};
+
+dictionary PluginCrashedEventInit : EventInit
+{
+  unsigned long pluginID = 0;
+  DOMString pluginDumpID = "";
+  DOMString pluginName = "";
+  DOMString? browserDumpID = null;
+  DOMString? pluginFilename = null;
+  boolean submittedCrashReport = false;
+};
diff --git a/dom/webidl/PointerEvent.webidl b/dom/webidl/PointerEvent.webidl
new file mode 100644
index 000000000..4e8a0eb90
--- /dev/null
+++ b/dom/webidl/PointerEvent.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information see nsIPointerEvent.idl.
+ *
+ * Portions Copyright 2013 Microsoft Open Technologies, Inc. */
+
+interface WindowProxy;
+
+[Pref="dom.w3c_pointer_events.enabled",
+ Constructor(DOMString type, optional PointerEventInit eventInitDict)]
+interface PointerEvent : MouseEvent
+{
+  readonly attribute long pointerId;
+  readonly attribute long width;
+  readonly attribute long height;
+  readonly attribute float pressure;
+  readonly attribute float tangentialPressure;
+  readonly attribute long tiltX;
+  readonly attribute long tiltY;
+  readonly attribute long twist;
+  readonly attribute DOMString pointerType;
+  readonly attribute boolean isPrimary;
+};
+
+dictionary PointerEventInit : MouseEventInit
+{
+  long pointerId = 0;
+  long width = 1;
+  long height = 1;
+  float pressure = 0;
+  float tangentialPressure = 0;
+  long tiltX = 0;
+  long tiltY = 0;
+  long twist = 0;
+  DOMString pointerType = "";
+  boolean isPrimary = false;
+};
+
diff --git a/dom/webidl/PopStateEvent.webidl b/dom/webidl/PopStateEvent.webidl
new file mode 100644
index 000000000..428ab9c84
--- /dev/null
+++ b/dom/webidl/PopStateEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional PopStateEventInit eventInitDict)]
+interface PopStateEvent : Event
+{
+  readonly attribute any state;
+};
+
+dictionary PopStateEventInit : EventInit
+{
+  any state = null;
+};
diff --git a/dom/webidl/PopupBlockedEvent.webidl b/dom/webidl/PopupBlockedEvent.webidl
new file mode 100644
index 000000000..bf338d56b
--- /dev/null
+++ b/dom/webidl/PopupBlockedEvent.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+interface URI;
+
+[Constructor(DOMString type, optional PopupBlockedEventInit eventInitDict)]
+interface PopupBlockedEvent : Event
+{
+  readonly attribute Window? requestingWindow;
+  readonly attribute URI? popupWindowURI;
+  readonly attribute DOMString? popupWindowName;
+  readonly attribute DOMString? popupWindowFeatures;
+};
+
+dictionary PopupBlockedEventInit : EventInit
+{
+  Window? requestingWindow = null;
+  URI? popupWindowURI = null;
+  DOMString popupWindowName = "";
+  DOMString popupWindowFeatures = "";
+};
diff --git a/dom/webidl/PopupBoxObject.webidl b/dom/webidl/PopupBoxObject.webidl
new file mode 100644
index 000000000..bb201ad89
--- /dev/null
+++ b/dom/webidl/PopupBoxObject.webidl
@@ -0,0 +1,191 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Func="IsChromeOrXBL"]
+interface PopupBoxObject : BoxObject
+{
+  /**
+   *  This method is deprecated. Use openPopup or openPopupAtScreen instead.
+   */
+  void showPopup(Element? srcContent, Element popupContent,
+                 long xpos, long ypos,
+                 optional DOMString popupType = "",
+                 optional DOMString anchorAlignment = "",
+                 optional DOMString popupAlignment = "");
+
+  /**
+   *  Hide the popup if it is open. The cancel argument is used as a hint that
+   *  the popup is being closed because it has been cancelled, rather than
+   *  something being selected within the panel.
+   *
+   * @param cancel if true, then the popup is being cancelled.
+   */
+  void hidePopup(optional boolean cancel = false);
+
+  /**
+   * Allow the popup to automatically position itself.
+   */
+  attribute boolean autoPosition;
+
+  /**
+   * If keyboard navigation is enabled, the keyboard may be used to navigate
+   * the menuitems on the popup. Enabling keyboard navigation is the default
+   * behaviour and will install capturing key event listeners on the popup
+   * that do not propagate key events to the contents. If you wish to place
+   * elements in a popup which accept key events, such as textboxes, keyboard
+   * navigation should be disabled.
+   *
+   * Setting ignorekeys="true" on the popup element also disables keyboard
+   * navigation, and is recommended over calling this method.
+   */
+  void enableKeyboardNavigator(boolean enableKeyboardNavigator);
+
+  /**
+   * Enable automatic popup dismissal. This only has effect when called
+   * on an open popup.
+   */
+  void enableRollup(boolean enableRollup);
+
+  /**
+   * Control whether the event that caused the popup to be automatically
+   * dismissed ("rolled up") should be consumed, or dispatched as a
+   * normal event.  This should be set immediately before calling showPopup()
+   * if non-default behavior is desired.
+   */
+  const unsigned long ROLLUP_DEFAULT = 0;   /* widget/platform default */
+  const unsigned long ROLLUP_CONSUME = 1;   /* consume the rollup event */
+  const unsigned long ROLLUP_NO_CONSUME = 2; /* don't consume the rollup event */
+  void setConsumeRollupEvent(unsigned long consume);
+
+  /**
+   * Size the popup to the given dimensions
+   */
+  void sizeTo(long width, long height);
+
+  /**
+   * Move the popup to a point on screen in CSS pixels.
+   */
+  void moveTo(long left, long top);
+
+  /**
+   * Open the popup relative to a specified node at a specific location.
+   *
+   * The popup may be either anchored to another node or opened freely.
+   * To anchor a popup to a node, supply an anchor node and set the position
+   * to a string indicating the manner in which the popup should be anchored.
+   * Possible values for position are:
+   *    before_start, before_end, after_start, after_end,
+   *    start_before, start_after, end_before, end_after,
+   *    overlap, after_pointer
+   *
+   * The anchor node does not need to be in the same document as the popup.
+   *
+   * If the attributesOverride argument is true, the popupanchor, popupalign
+   * and position attributes on the popup node override the position value
+   * argument. If attributesOverride is false, the attributes are only used
+   * if position is empty.
+   *
+   * For an anchored popup, the x and y arguments may be used to offset the
+   * popup from its anchored position by some distance, measured in CSS pixels.
+   * x increases to the right and y increases down. Negative values may also
+   * be used to move to the left and upwards respectively.
+   *
+   * Unanchored popups may be created by supplying null as the anchor node.
+   * An unanchored popup appears at the position specified by x and y,
+   * relative to the viewport of the document containing the popup node. In
+   * this case, position and attributesOverride are ignored.
+   *
+   * @param anchorElement the node to anchor the popup to, may be null
+   * @param position manner is which to anchor the popup to node
+   * @param x horizontal offset
+   * @param y vertical offset
+   * @param isContextMenu true for context menus, false for other popups
+   * @param attributesOverride true if popup node attributes override position
+   * @param triggerEvent the event that triggered this popup (mouse click for example)
+   */
+  void openPopup(Element? anchorElement,
+                 optional DOMString position = "",
+                 long x,
+                 long y,
+                 boolean isContextMenu,
+                 boolean attributesOverride,
+                 Event? triggerEvent);
+
+  /**
+   * Open the popup at a specific screen position specified by x and y. This
+   * position may be adjusted if it would cause the popup to be off of the
+   * screen. The x and y coordinates are measured in CSS pixels, and like all
+   * screen coordinates, are given relative to the top left of the primary
+   * screen.
+   *
+   * @param isContextMenu true for context menus, false for other popups
+   * @param x horizontal screen position
+   * @param y vertical screen position
+   * @param triggerEvent the event that triggered this popup (mouse click for example)
+   */
+  void openPopupAtScreen(long x, long y,
+                         boolean isContextMenu,
+                         Event? triggerEvent);
+
+  /**
+   * Open the popup anchored at a specific screen rectangle. This function is
+   * similar to openPopup except that that rectangle of the anchor is supplied
+   * rather than an element. The anchor rectangle arguments are screen
+   * coordinates.
+   */
+  void openPopupAtScreenRect(optional DOMString position = "",
+                             long x,
+                             long y,
+                             long width,
+                             long height,
+                             boolean isContextMenu,
+                             boolean attributesOverride,
+                             Event? triggerEvent);
+
+  /**
+   * Returns the state of the popup:
+   *   closed - the popup is closed
+   *   open - the popup is open
+   *   showing - the popup is in the process of being shown
+   *   hiding - the popup is in the process of being hidden
+   */
+  readonly attribute DOMString popupState;
+
+  /**
+   * The node that triggered the popup. If the popup is not open, will return
+   * null.
+   */
+  readonly attribute Node? triggerNode;
+
+  /**
+   * Retrieve the anchor that was specified to openPopup or for menupopups in a
+   * menu, the parent menu.
+   */
+  readonly attribute Element? anchorNode;
+
+  /**
+   * Retrieve the screen rectangle of the popup, including the area occupied by
+   * any titlebar or borders present.
+   */
+  DOMRect getOuterScreenRect();
+
+  /**
+   * Move an open popup to the given anchor position. The arguments have the same
+   * meaning as the corresponding argument to openPopup. This method has no effect
+   * on popups that are not open.
+   */
+  void moveToAnchor(Element? anchorElement,
+                    optional DOMString position = "",
+                    long x, long y,
+                    boolean attributesOverride);
+
+  /** Returns the alignment position where the popup has appeared relative to its
+   *  anchor node or point, accounting for any flipping that occurred.
+   */
+  readonly attribute DOMString alignmentPosition;
+  readonly attribute long alignmentOffset;
+
+  void setConstraintRect(DOMRectReadOnly rect);
+};
diff --git a/dom/webidl/Position.webidl b/dom/webidl/Position.webidl
new file mode 100644
index 000000000..93812a379
--- /dev/null
+++ b/dom/webidl/Position.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/geolocation-API
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface Position {
+  readonly attribute Coordinates coords;
+  readonly attribute DOMTimeStamp timestamp;
+};
diff --git a/dom/webidl/PositionError.webidl b/dom/webidl/PositionError.webidl
new file mode 100644
index 000000000..d644cbe48
--- /dev/null
+++ b/dom/webidl/PositionError.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/geolocation-API
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface PositionError {
+  const unsigned short PERMISSION_DENIED = 1;
+  const unsigned short POSITION_UNAVAILABLE = 2;
+  const unsigned short TIMEOUT = 3;
+  readonly attribute unsigned short code;
+  readonly attribute DOMString message;
+};
diff --git a/dom/webidl/ProcessingInstruction.webidl b/dom/webidl/ProcessingInstruction.webidl
new file mode 100644
index 000000000..8f376c1c3
--- /dev/null
+++ b/dom/webidl/ProcessingInstruction.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface ProcessingInstruction : CharacterData {
+  readonly attribute DOMString target;
+};
diff --git a/dom/webidl/ProfileTimelineMarker.webidl b/dom/webidl/ProfileTimelineMarker.webidl
new file mode 100644
index 000000000..ca2ef21ac
--- /dev/null
+++ b/dom/webidl/ProfileTimelineMarker.webidl
@@ -0,0 +1,74 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// For Javascript markers, the |stack| of a ProfileTimelineMarker
+// holds an object of this type.  It intentionally looks like a
+// SavedStack object and is a representation of the frame that is
+// about to be constructed at the entry point.
+dictionary ProfileTimelineStackFrame {
+  long line;
+  long column = 0;
+  DOMString source;
+  DOMString functionDisplayName;
+  object? parent = null;
+  object? asyncParent = null;
+  DOMString asyncCause;
+};
+
+dictionary ProfileTimelineLayerRect {
+  long x = 0;
+  long y = 0;
+  long width = 0;
+  long height = 0;
+};
+
+enum ProfileTimelineMessagePortOperationType {
+  "serializeData",
+  "deserializeData",
+};
+
+enum ProfileTimelineWorkerOperationType {
+  "serializeDataOffMainThread",
+  "serializeDataOnMainThread",
+  "deserializeDataOffMainThread",
+  "deserializeDataOnMainThread",
+};
+
+dictionary ProfileTimelineMarker {
+  DOMString name = "";
+  DOMHighResTimeStamp start = 0;
+  DOMHighResTimeStamp end = 0;
+  object? stack = null;
+
+  unsigned short processType;
+  boolean isOffMainThread;
+
+  /* For ConsoleTime, Timestamp and Javascript markers.  */
+  DOMString causeName;
+
+  /* For ConsoleTime markers.  */
+  object? endStack = null;
+
+  /* For DOMEvent markers.  */
+  DOMString type;
+  unsigned short eventPhase;
+
+  /* For document::DOMContentLoaded and document::Load markers. Using this
+   * instead of the `start` and `end` timestamps is strongly discouraged. */
+  unsigned long long unixTime; // in microseconds
+
+  /* For Paint markers.  */
+  sequence<ProfileTimelineLayerRect> rectangles;
+
+  /* For Style markers. */
+  DOMString restyleHint;
+
+  /* For MessagePort markers. */
+  ProfileTimelineMessagePortOperationType messagePortOperation;
+
+  /* For Worker markers. */
+  ProfileTimelineWorkerOperationType workerOperation;
+};
diff --git a/dom/webidl/ProgressEvent.webidl b/dom/webidl/ProgressEvent.webidl
new file mode 100644
index 000000000..1be356b8f
--- /dev/null
+++ b/dom/webidl/ProgressEvent.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional ProgressEventInit eventInitDict)]
+interface ProgressEvent : Event
+{
+  readonly attribute boolean lengthComputable;
+  readonly attribute unsigned long long loaded;
+  readonly attribute unsigned long long total;
+};
+
+dictionary ProgressEventInit : EventInit
+{
+  boolean lengthComputable = false;
+  unsigned long long loaded = 0;
+  unsigned long long total = 0;
+};
diff --git a/dom/webidl/Promise.webidl b/dom/webidl/Promise.webidl
new file mode 100644
index 000000000..a296553df
--- /dev/null
+++ b/dom/webidl/Promise.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This IDL file contains utilities to help connect JS promises to our
+ * Web IDL infrastructure.
+ */
+
+callback PromiseJobCallback = void();
+
+[TreatNonCallableAsNull]
+callback AnyCallback = any (any value);
+
+// Hack to allow us to have JS owning and properly tracing/CCing/etc a
+// PromiseNativeHandler.
+[NoInterfaceObject,
+ Exposed=(Window,Worker,System)]
+interface PromiseNativeHandler {
+};
diff --git a/dom/webidl/PromiseDebugging.webidl b/dom/webidl/PromiseDebugging.webidl
new file mode 100644
index 000000000..1a5c1aa32
--- /dev/null
+++ b/dom/webidl/PromiseDebugging.webidl
@@ -0,0 +1,108 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/* This is a utility namespace for promise-debugging functionality */
+
+
+dictionary PromiseDebuggingStateHolder {
+  PromiseDebuggingState state = "pending";
+  any value;
+  any reason;
+};
+enum PromiseDebuggingState { "pending", "fulfilled", "rejected" };
+
+/**
+ * An observer for Promise that _may_ be leaking uncaught rejections.
+ *
+ * It is generally a programming error to leave a Promise rejected and
+ * not consume its rejection. The information exposed by this
+ * interface is designed to allow clients to track down such Promise,
+ * i.e. Promise that are currently
+ * - in `rejected` state;
+ * - last of their chain.
+ *
+ * Note, however, that a promise in such a state at the end of a tick
+ * may eventually be consumed in some ulterior tick. Implementers of
+ * this interface are responsible for presenting the information
+ * in a meaningful manner.
+ */
+callback interface UncaughtRejectionObserver {
+  /**
+   * A Promise has been left in `rejected` state and is the
+   * last in its chain.
+   *
+   * @param p A currently uncaught Promise. If `p` is is eventually
+   * caught, i.e. if its `then` callback is called, `onConsumed` will
+   * be called.
+   */
+  void onLeftUncaught(object p);
+
+  /**
+   * A Promise previously left uncaught is not the last in its
+   * chain anymore.
+   *
+   * @param p A Promise that was previously left in uncaught state is
+   * now caught, i.e. it is not the last in its chain anymore.
+   */
+  void onConsumed(object p);
+};
+
+[ChromeOnly, Exposed=(Window,System)]
+interface PromiseDebugging {
+  /**
+   * The various functions on this interface all expect to take promises but
+   * don't want the WebIDL behavior of assimilating random passed-in objects
+   * into promises.  They also want to treat Promise subclass instances as
+   * promises instead of wrapping them in a vanilla Promise, which is what the
+   * IDL spec says to do.  So we list all our arguments as "object" instead of
+   * "Promise" and check for them being a Promise internally.
+   */
+
+  /**
+   * Get the current state of the given promise.
+   */
+  [Throws]
+  static PromiseDebuggingStateHolder getState(object p);
+
+  /**
+   * Return an identifier for a promise. This identifier is guaranteed
+   * to be unique to the current process.
+   */
+  [Throws]
+  static DOMString getPromiseID(object p);
+
+  /**
+   * Return the stack to the promise's allocation point.  This can
+   * return null if the promise was not created from script.
+   */
+  [Throws]
+  static object? getAllocationStack(object p);
+
+  /**
+   * Return the stack to the promise's rejection point, if the
+   * rejection happened from script.  This can return null if the
+   * promise has not been rejected or was not rejected from script.
+   */
+  [Throws]
+  static object? getRejectionStack(object p);
+
+  /**
+   * Return the stack to the promise's fulfillment point, if the
+   * fulfillment happened from script.  This can return null if the
+   * promise has not been fulfilled or was not fulfilled from script.
+   */
+  [Throws]
+  static object? getFullfillmentStack(object p);
+
+  /**
+   * Watching uncaught rejections on the current thread.
+   *
+   * Adding an observer twice will cause it to be notified twice
+   * of events.
+   */
+  static void addUncaughtRejectionObserver(UncaughtRejectionObserver o);
+  static boolean removeUncaughtRejectionObserver(UncaughtRejectionObserver o);
+};
diff --git a/dom/webidl/PushEvent.webidl b/dom/webidl/PushEvent.webidl
new file mode 100644
index 000000000..a4624e451
--- /dev/null
+++ b/dom/webidl/PushEvent.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/push-api/
+ */
+
+[Constructor(DOMString type, optional PushEventInit eventInitDict),
+ Func="nsContentUtils::PushEnabled",
+ Exposed=ServiceWorker]
+interface PushEvent : ExtendableEvent {
+  readonly attribute PushMessageData? data;
+};
+
+typedef (BufferSource or USVString) PushMessageDataInit;
+
+dictionary PushEventInit : ExtendableEventInit {
+  PushMessageDataInit data;
+};
diff --git a/dom/webidl/PushManager.webidl b/dom/webidl/PushManager.webidl
new file mode 100644
index 000000000..de1e632c7
--- /dev/null
+++ b/dom/webidl/PushManager.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/.
+*
+* The origin of this IDL file is
+* https://w3c.github.io/push-api/
+*/
+
+dictionary PushSubscriptionOptionsInit {
+  // boolean userVisibleOnly = false;
+  BufferSource? applicationServerKey = null;
+};
+
+// The main thread JS implementation. Please see comments in
+// dom/push/PushManager.h for the split between PushManagerImpl and PushManager.
+[JSImplementation="@mozilla.org/push/PushManager;1",
+ ChromeOnly, Constructor(DOMString scope)]
+interface PushManagerImpl {
+  Promise<PushSubscription>    subscribe(optional PushSubscriptionOptionsInit options);
+  Promise<PushSubscription?>   getSubscription();
+  Promise<PushPermissionState> permissionState(optional PushSubscriptionOptionsInit options);
+};
+
+[Exposed=(Window,Worker), Func="nsContentUtils::PushEnabled",
+ ChromeConstructor(DOMString scope)]
+interface PushManager {
+  [Throws, UseCounter]
+  Promise<PushSubscription>    subscribe(optional PushSubscriptionOptionsInit options);
+  [Throws]
+  Promise<PushSubscription?>   getSubscription();
+  [Throws]
+  Promise<PushPermissionState> permissionState(optional PushSubscriptionOptionsInit options);
+};
+
+enum PushPermissionState
+{
+    "granted",
+    "denied",
+    "prompt"
+};
diff --git a/dom/webidl/PushMessageData.webidl b/dom/webidl/PushMessageData.webidl
new file mode 100644
index 000000000..32da84f37
--- /dev/null
+++ b/dom/webidl/PushMessageData.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/push-api/
+ */
+
+[Func="nsContentUtils::PushEnabled",
+ Exposed=ServiceWorker]
+interface PushMessageData
+{
+    [Throws]
+    ArrayBuffer arrayBuffer();
+    [Throws]
+    Blob        blob();
+    [Throws]
+    any         json();
+    USVString   text();
+};
diff --git a/dom/webidl/PushSubscription.webidl b/dom/webidl/PushSubscription.webidl
new file mode 100644
index 000000000..eab576d3c
--- /dev/null
+++ b/dom/webidl/PushSubscription.webidl
@@ -0,0 +1,53 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/.
+*
+* The origin of this IDL file is
+* https://w3c.github.io/push-api/
+*/
+
+interface Principal;
+
+enum PushEncryptionKeyName
+{
+  "p256dh",
+  "auth"
+};
+
+dictionary PushSubscriptionKeys
+{
+  ByteString p256dh;
+  ByteString auth;
+};
+
+dictionary PushSubscriptionJSON
+{
+  USVString endpoint;
+  PushSubscriptionKeys keys;
+};
+
+dictionary PushSubscriptionInit
+{
+  required USVString endpoint;
+  required USVString scope;
+  ArrayBuffer? p256dhKey;
+  ArrayBuffer? authSecret;
+  BufferSource? appServerKey;
+};
+
+[Exposed=(Window,Worker), Func="nsContentUtils::PushEnabled",
+ ChromeConstructor(PushSubscriptionInit initDict)]
+interface PushSubscription
+{
+  readonly attribute USVString endpoint;
+  readonly attribute PushSubscriptionOptions options;
+  [Throws]
+  ArrayBuffer? getKey(PushEncryptionKeyName name);
+  [Throws, UseCounter]
+  Promise<boolean> unsubscribe();
+
+  // Implements the custom serializer specified in Push API, section 9.
+  [Throws]
+  PushSubscriptionJSON toJSON();
+};
diff --git a/dom/webidl/PushSubscriptionOptions.webidl b/dom/webidl/PushSubscriptionOptions.webidl
new file mode 100644
index 000000000..569a1ddae
--- /dev/null
+++ b/dom/webidl/PushSubscriptionOptions.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/.
+*
+* The origin of this IDL file is
+* https://w3c.github.io/push-api/
+*/
+
+[Exposed=(Window,Worker), Func="nsContentUtils::PushEnabled"]
+interface PushSubscriptionOptions
+{
+  [SameObject, Throws]
+  readonly attribute ArrayBuffer? applicationServerKey;
+};
diff --git a/dom/webidl/RGBColor.webidl b/dom/webidl/RGBColor.webidl
new file mode 100644
index 000000000..6e80ec72c
--- /dev/null
+++ b/dom/webidl/RGBColor.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-RGBColor
+ */
+
+interface RGBColor {
+  readonly attribute CSSPrimitiveValue  red;
+  readonly attribute CSSPrimitiveValue  green;
+  readonly attribute CSSPrimitiveValue  blue;
+
+  // mozilla specific
+  readonly attribute CSSPrimitiveValue alpha;
+};
diff --git a/dom/webidl/RTCStatsReport.webidl b/dom/webidl/RTCStatsReport.webidl
new file mode 100644
index 000000000..eaf4fcd0d
--- /dev/null
+++ b/dom/webidl/RTCStatsReport.webidl
@@ -0,0 +1,168 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/webrtc.html#rtcstatsreport-object
+ * http://www.w3.org/2011/04/webrtc/wiki/Stats
+ */
+
+enum RTCStatsType {
+  "inboundrtp",
+  "outboundrtp",
+  "session",
+  "track",
+  "transport",
+  "candidatepair",
+  "localcandidate",
+  "remotecandidate"
+};
+
+dictionary RTCStats {
+  DOMHighResTimeStamp timestamp;
+  RTCStatsType type;
+  DOMString id;
+};
+
+dictionary RTCRTPStreamStats : RTCStats {
+  DOMString ssrc;
+  DOMString mediaType;
+  DOMString remoteId;
+  boolean isRemote = false;
+  DOMString mediaTrackId;
+  DOMString transportId;
+  DOMString codecId;
+
+  // Video encoder/decoder measurements (absent for rtcp)
+  double bitrateMean;
+  double bitrateStdDev;
+  double framerateMean;
+  double framerateStdDev;
+};
+
+dictionary RTCInboundRTPStreamStats : RTCRTPStreamStats {
+  unsigned long packetsReceived;
+  unsigned long long bytesReceived;
+  double jitter;
+  unsigned long packetsLost;
+  long mozAvSyncDelay;
+  long mozJitterBufferDelay;
+  long mozRtt;
+
+  // Video decoder measurement (absent in rtcp case)
+  unsigned long discardedPackets;
+};
+
+dictionary RTCOutboundRTPStreamStats : RTCRTPStreamStats {
+  unsigned long packetsSent;
+  unsigned long long bytesSent;
+  double targetBitrate;  // config encoder bitrate target of this SSRC in bits/s
+
+  // Video encoder measurement (absent in rtcp case)
+  unsigned long droppedFrames;
+};
+
+dictionary RTCMediaStreamTrackStats : RTCStats {
+  DOMString trackIdentifier;      // track.id property
+  boolean remoteSource;
+  sequence<DOMString> ssrcIds;
+  // Stuff that makes sense for video
+  unsigned long frameWidth;
+  unsigned long frameHeight;
+  double framesPerSecond;        // The nominal FPS value
+  unsigned long framesSent;
+  unsigned long framesReceived;  // Only for remoteSource=true
+  unsigned long framesDecoded;
+  unsigned long framesDropped;   // See VideoPlaybackQuality.droppedVideoFrames
+  unsigned long framesCorrupted; // as above.
+  // Stuff that makes sense for audio
+  double audioLevel;               // linear, 1.0 = 0 dBov (from RFC 6464).
+  // AEC stuff on audio tracks sourced from a microphone where AEC is applied
+  double echoReturnLoss;           // in decibels from G.168 (2012) section 3.14
+  double echoReturnLossEnhancement; // as above, section 3.15
+};
+
+dictionary RTCMediaStreamStats : RTCStats {
+  DOMString streamIdentifier;     // stream.id property
+  sequence<DOMString> trackIds;   // Note: stats object ids, not track.id
+};
+
+dictionary RTCTransportStats: RTCStats {
+  unsigned long bytesSent;
+  unsigned long bytesReceived;
+};
+
+dictionary RTCIceComponentStats : RTCStats {
+  DOMString transportId;
+  long component;
+  unsigned long bytesSent;
+  unsigned long bytesReceived;
+  boolean activeConnection;
+};
+
+enum RTCStatsIceCandidatePairState {
+  "frozen",
+  "waiting",
+  "inprogress",
+  "failed",
+  "succeeded",
+  "cancelled"
+};
+
+dictionary RTCIceCandidatePairStats : RTCStats {
+  DOMString componentId;
+  DOMString localCandidateId;
+  DOMString remoteCandidateId;
+  RTCStatsIceCandidatePairState state;
+  unsigned long long priority;
+  boolean readable;
+  boolean nominated;
+  boolean selected;
+};
+
+enum RTCStatsIceCandidateType {
+  "host",
+  "serverreflexive",
+  "peerreflexive",
+  "relayed"
+};
+
+dictionary RTCIceCandidateStats : RTCStats {
+  DOMString componentId;
+  DOMString candidateId;
+  DOMString ipAddress;
+  DOMString transport;
+  DOMString mozLocalTransport; // needs standardization
+  long portNumber;
+  RTCStatsIceCandidateType candidateType;
+};
+
+dictionary RTCCodecStats : RTCStats {
+  unsigned long payloadType;       // As used in RTP encoding.
+  DOMString codec;                 // video/vp8 or equivalent
+  unsigned long clockRate;
+  unsigned long channels;          // 2=stereo, missing for most other cases.
+  DOMString parameters;            // From SDP description line
+};
+
+// This is the internal representation of the report in this implementation
+// to be received from c++
+
+dictionary RTCStatsReportInternal {
+  DOMString                           pcid = "";
+  sequence<RTCInboundRTPStreamStats>  inboundRTPStreamStats;
+  sequence<RTCOutboundRTPStreamStats> outboundRTPStreamStats;
+  sequence<RTCMediaStreamTrackStats>  mediaStreamTrackStats;
+  sequence<RTCMediaStreamStats>       mediaStreamStats;
+  sequence<RTCTransportStats>         transportStats;
+  sequence<RTCIceComponentStats>      iceComponentStats;
+  sequence<RTCIceCandidatePairStats>  iceCandidatePairStats;
+  sequence<RTCIceCandidateStats>      iceCandidateStats;
+  sequence<RTCCodecStats>             codecStats;
+  DOMString                           localSdp;
+  DOMString                           remoteSdp;
+  DOMHighResTimeStamp                 timestamp;
+  boolean                             closed; // Is the PC now closed
+};
+
diff --git a/dom/webidl/RadioNodeList.webidl b/dom/webidl/RadioNodeList.webidl
new file mode 100644
index 000000000..4e533533a
--- /dev/null
+++ b/dom/webidl/RadioNodeList.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/common-dom-interfaces.html#htmlformcontrolscollection-0
+ *
+ * © Copyright 2004-2014 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface RadioNodeList : NodeList {
+  attribute DOMString value;
+};
diff --git a/dom/webidl/Range.webidl b/dom/webidl/Range.webidl
new file mode 100644
index 000000000..6b8be970b
--- /dev/null
+++ b/dom/webidl/Range.webidl
@@ -0,0 +1,98 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dom.spec.whatwg.org/#range
+ * http://domparsing.spec.whatwg.org/#dom-range-createcontextualfragment
+ * http://dvcs.w3.org/hg/csswg/raw-file/tip/cssom-view/Overview.html#extensions-to-the-range-interface
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor]
+interface Range {
+  [Throws]
+  readonly attribute Node startContainer;
+  [Throws]
+  readonly attribute unsigned long startOffset;
+  [Throws]
+  readonly attribute Node endContainer;
+  [Throws]
+  readonly attribute unsigned long endOffset;
+  readonly attribute boolean collapsed;
+  [Throws]
+  readonly attribute Node commonAncestorContainer;
+
+  [Throws]
+  void setStart(Node refNode, unsigned long offset);
+  [Throws]
+  void setEnd(Node refNode, unsigned long offset);
+  [Throws]
+  void setStartBefore(Node refNode);
+  [Throws]
+  void setStartAfter(Node refNode);
+  [Throws]
+  void setEndBefore(Node refNode);
+  [Throws]
+  void setEndAfter(Node refNode);
+  void collapse(optional boolean toStart = false);
+  [Throws]
+  void selectNode(Node refNode);
+  [Throws]
+  void selectNodeContents(Node refNode);
+
+  const unsigned short START_TO_START = 0;
+  const unsigned short START_TO_END = 1;
+  const unsigned short END_TO_END = 2;
+  const unsigned short END_TO_START = 3;
+  [Throws]
+  short compareBoundaryPoints(unsigned short how, Range sourceRange);
+  [CEReactions, Throws]
+  void deleteContents();
+  [CEReactions, Throws]
+  DocumentFragment extractContents();
+  [CEReactions, Throws]
+  DocumentFragment cloneContents();
+  [CEReactions, Throws]
+  void insertNode(Node node);
+  [CEReactions, Throws]
+  void surroundContents(Node newParent);
+
+  Range cloneRange();
+  void detach();
+
+  [Throws]
+  boolean isPointInRange(Node node, unsigned long offset);
+  [Throws]
+  short comparePoint(Node node, unsigned long offset);
+
+  [Throws]
+  boolean intersectsNode(Node node);
+
+  stringifier;
+};
+
+// http://domparsing.spec.whatwg.org/#dom-range-createcontextualfragment
+partial interface Range {
+  [CEReactions, Throws]
+  DocumentFragment createContextualFragment(DOMString fragment);
+};
+
+// http://dvcs.w3.org/hg/csswg/raw-file/tip/cssom-view/Overview.html#extensions-to-the-range-interface
+partial interface Range {
+  DOMRectList? getClientRects();
+  DOMRect getBoundingClientRect();
+};
+
+dictionary ClientRectsAndTexts {
+  required DOMRectList rectList;
+  required DOMStringList textList;
+};
+
+partial interface Range {
+  [ChromeOnly, Throws]
+  ClientRectsAndTexts getClientRectsAndTexts();
+};
diff --git a/dom/webidl/RecordErrorEvent.webidl b/dom/webidl/RecordErrorEvent.webidl
new file mode 100644
index 000000000..c7022dbbe
--- /dev/null
+++ b/dom/webidl/RecordErrorEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional RecordErrorEventInit eventInitDict)]
+interface RecordErrorEvent : Event
+{
+  readonly attribute DOMString name;
+};
+
+dictionary RecordErrorEventInit : EventInit
+{
+  DOMString name = "";
+};
diff --git a/dom/webidl/Rect.webidl b/dom/webidl/Rect.webidl
new file mode 100644
index 000000000..1be318143
--- /dev/null
+++ b/dom/webidl/Rect.webidl
@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface Rect {
+  readonly attribute CSSPrimitiveValue top;
+  readonly attribute CSSPrimitiveValue right;
+  readonly attribute CSSPrimitiveValue bottom;
+  readonly attribute CSSPrimitiveValue left;
+};
diff --git a/dom/webidl/Request.webidl b/dom/webidl/Request.webidl
new file mode 100644
index 000000000..9140543e7
--- /dev/null
+++ b/dom/webidl/Request.webidl
@@ -0,0 +1,76 @@
+/* -*- Mode: IDL; tab-width: 1; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://fetch.spec.whatwg.org/#request-class
+ */
+
+typedef (Request or USVString) RequestInfo;
+typedef unsigned long nsContentPolicyType;
+
+[Constructor(RequestInfo input, optional RequestInit init),
+ Exposed=(Window,Worker)]
+interface Request {
+  readonly attribute ByteString method;
+  readonly attribute USVString url;
+  [SameObject] readonly attribute Headers headers;
+
+  [Func="mozilla::dom::Request::RequestContextEnabled"]
+  readonly attribute RequestContext context;
+  readonly attribute USVString referrer;
+  readonly attribute ReferrerPolicy referrerPolicy;
+  readonly attribute RequestMode mode;
+  readonly attribute RequestCredentials credentials;
+  readonly attribute RequestCache cache;
+  readonly attribute RequestRedirect redirect;
+  readonly attribute DOMString integrity;
+
+  [Func="AbortController::IsEnabled",
+   BinaryName="getOrCreateSignal"]
+  readonly attribute AbortSignal signal;
+
+  [Throws,
+   NewObject] Request clone();
+
+  // Bug 1124638 - Allow chrome callers to set the context.
+  [ChromeOnly]
+  void overrideContentPolicyType(nsContentPolicyType context);
+};
+Request implements Body;
+
+dictionary RequestInit {
+  ByteString method;
+  HeadersInit headers;
+  BodyInit? body;
+  USVString referrer;
+  ReferrerPolicy referrerPolicy;
+  RequestMode mode;
+  RequestCredentials credentials;
+  RequestCache cache;
+  RequestRedirect redirect;
+  DOMString integrity;
+
+  [Func="AbortController::IsEnabled"]
+  AbortSignal? signal;
+
+  [Func="FetchObserver::IsEnabled"]
+  ObserverCallback observe;
+};
+
+// Gecko currently does not ship RequestContext, so please don't use it in IDL
+// that is exposed to script.
+enum RequestContext {
+  "audio", "beacon", "cspreport", "download", "embed", "eventsource", "favicon", "fetch",
+  "font", "form", "frame", "hyperlink", "iframe", "image", "imageset", "import",
+  "internal", "location", "manifest", "object", "ping", "plugin", "prefetch", "script",
+  "sharedworker", "subresource", "style", "track", "video", "worker", "xmlhttprequest",
+  "xslt"
+};
+
+enum RequestMode { "same-origin", "no-cors", "cors", "navigate" };
+enum RequestCredentials { "omit", "same-origin", "include" };
+enum RequestCache { "default", "no-store", "reload", "no-cache", "force-cache", "only-if-cached" };
+enum RequestRedirect { "follow", "error", "manual" };
+enum ReferrerPolicy { "", "no-referrer", "no-referrer-when-downgrade", "origin", "origin-when-cross-origin", "unsafe-url" };
diff --git a/dom/webidl/ResizeObserver.webidl b/dom/webidl/ResizeObserver.webidl
new file mode 100644
index 000000000..d764af7cb
--- /dev/null
+++ b/dom/webidl/ResizeObserver.webidl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

+/* This Source Code Form is subject to the terms of the Mozilla Public

+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,

+ * You can obtain one at http://mozilla.org/MPL/2.0/.

+ *

+ * The origin of this IDL file is

+ * https://wicg.github.io/ResizeObserver/

+ */

+

+enum ResizeObserverBoxOptions {

+    "border-box",

+    "content-box"

+};

+

+dictionary ResizeObserverOptions {

+    ResizeObserverBoxOptions box = "content-box";

+};

+

+[Constructor(ResizeObserverCallback callback),

+ Exposed=Window,

+ Pref="layout.css.resizeobserver.enabled"]

+interface ResizeObserver {

+    [Throws]

+    void observe(Element? target, optional ResizeObserverOptions options);

+    [Throws]

+    void unobserve(Element? target);

+    void disconnect();

+};

+

+callback ResizeObserverCallback = void (sequence<ResizeObserverEntry> entries, ResizeObserver observer);

+

+[Constructor(Element? target),

+ Pref="layout.css.resizeobserver.enabled"]

+interface ResizeObserverEntry {

+    readonly attribute Element target;

+    readonly attribute DOMRectReadOnly? contentRect;

+    readonly attribute ResizeObserverSize borderBoxSize;

+    readonly attribute ResizeObserverSize contentBoxSize;

+};

+

+[Pref="layout.css.resizeobserver.enabled"]

+interface ResizeObserverSize {

+    readonly attribute unrestricted double inlineSize;

+    readonly attribute unrestricted double blockSize;

+};

+

+[ChromeOnly,

+ Pref="layout.css.resizeobserver.enabled"]

+interface ResizeObservation {

+    readonly attribute Element target;

+    boolean isActive();

+};

diff --git a/dom/webidl/Response.webidl b/dom/webidl/Response.webidl
new file mode 100644
index 000000000..08f31fe29
--- /dev/null
+++ b/dom/webidl/Response.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://fetch.spec.whatwg.org/#response-class
+ */
+
+[Constructor(optional BodyInit? body, optional ResponseInit init),
+ Exposed=(Window,Worker)]
+interface Response {
+  [NewObject] static Response error();
+  [Throws,
+   NewObject] static Response redirect(USVString url, optional unsigned short status = 302);
+
+  readonly attribute ResponseType type;
+
+  readonly attribute USVString url;
+  readonly attribute boolean redirected;
+  readonly attribute unsigned short status;
+  readonly attribute boolean ok;
+  readonly attribute ByteString statusText;
+  [SameObject] readonly attribute Headers headers;
+
+  [Throws,
+   NewObject] Response clone();
+
+  [ChromeOnly, NewObject, Throws] Response cloneUnfiltered();
+};
+Response implements Body;
+
+dictionary ResponseInit {
+  unsigned short status = 200;
+  ByteString statusText = "OK";
+  HeadersInit headers;
+};
+
+enum ResponseType { "basic", "cors", "default", "error", "opaque", "opaqueredirect" };
diff --git a/dom/webidl/SVGAElement.webidl b/dom/webidl/SVGAElement.webidl
new file mode 100644
index 000000000..f15866911
--- /dev/null
+++ b/dom/webidl/SVGAElement.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAElement : SVGGraphicsElement {
+  readonly attribute SVGAnimatedString target;
+
+  [SetterThrows]
+  attribute DOMString download;
+};
+
+SVGAElement implements SVGURIReference;
+
diff --git a/dom/webidl/SVGAngle.webidl b/dom/webidl/SVGAngle.webidl
new file mode 100644
index 000000000..f17b8836c
--- /dev/null
+++ b/dom/webidl/SVGAngle.webidl
@@ -0,0 +1,35 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAngle {
+
+  // Angle Unit Types
+  const unsigned short SVG_ANGLETYPE_UNKNOWN = 0;
+  const unsigned short SVG_ANGLETYPE_UNSPECIFIED = 1;
+  const unsigned short SVG_ANGLETYPE_DEG = 2;
+  const unsigned short SVG_ANGLETYPE_RAD = 3;
+  const unsigned short SVG_ANGLETYPE_GRAD = 4;
+
+  readonly attribute unsigned short unitType;
+           [SetterThrows]
+           attribute float value;
+           [SetterThrows]
+           attribute float valueInSpecifiedUnits;
+           [SetterThrows]
+           attribute DOMString valueAsString;
+
+  [Throws]
+  void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits);
+  [Throws]
+  void convertToSpecifiedUnits(unsigned short unitType);
+};
+
diff --git a/dom/webidl/SVGAnimateElement.webidl b/dom/webidl/SVGAnimateElement.webidl
new file mode 100644
index 000000000..c9841f2a8
--- /dev/null
+++ b/dom/webidl/SVGAnimateElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimateElement : SVGAnimationElement {
+};
+
diff --git a/dom/webidl/SVGAnimateMotionElement.webidl b/dom/webidl/SVGAnimateMotionElement.webidl
new file mode 100644
index 000000000..38993d761
--- /dev/null
+++ b/dom/webidl/SVGAnimateMotionElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimateMotionElement : SVGAnimationElement {
+};
+
diff --git a/dom/webidl/SVGAnimateTransformElement.webidl b/dom/webidl/SVGAnimateTransformElement.webidl
new file mode 100644
index 000000000..38701e61c
--- /dev/null
+++ b/dom/webidl/SVGAnimateTransformElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimateTransformElement : SVGAnimationElement {
+};
+
diff --git a/dom/webidl/SVGAnimatedAngle.webidl b/dom/webidl/SVGAnimatedAngle.webidl
new file mode 100644
index 000000000..5b01c8c35
--- /dev/null
+++ b/dom/webidl/SVGAnimatedAngle.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedAngle {
+  [Constant]
+  readonly attribute SVGAngle baseVal;
+  [Constant]
+  readonly attribute SVGAngle animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedBoolean.webidl b/dom/webidl/SVGAnimatedBoolean.webidl
new file mode 100644
index 000000000..990bbc7de
--- /dev/null
+++ b/dom/webidl/SVGAnimatedBoolean.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedBoolean {
+           attribute boolean baseVal;
+  readonly attribute boolean animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedEnumeration.webidl b/dom/webidl/SVGAnimatedEnumeration.webidl
new file mode 100644
index 000000000..80591c2f1
--- /dev/null
+++ b/dom/webidl/SVGAnimatedEnumeration.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/types.html#InterfaceSVGAnimatedEnumeration
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedEnumeration {
+  [SetterThrows]
+           attribute unsigned short baseVal;
+  readonly attribute unsigned short animVal;
+};
diff --git a/dom/webidl/SVGAnimatedInteger.webidl b/dom/webidl/SVGAnimatedInteger.webidl
new file mode 100644
index 000000000..61b43b351
--- /dev/null
+++ b/dom/webidl/SVGAnimatedInteger.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/types.html#InterfaceSVGAnimatedInteger
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedInteger {
+           attribute long baseVal;
+  readonly attribute long animVal;
+};
diff --git a/dom/webidl/SVGAnimatedLength.webidl b/dom/webidl/SVGAnimatedLength.webidl
new file mode 100644
index 000000000..f7fac144d
--- /dev/null
+++ b/dom/webidl/SVGAnimatedLength.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedLength {
+  [Constant]
+  readonly attribute SVGLength baseVal;
+  [Constant]
+  readonly attribute SVGLength animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedLengthList.webidl b/dom/webidl/SVGAnimatedLengthList.webidl
new file mode 100644
index 000000000..0d85e1616
--- /dev/null
+++ b/dom/webidl/SVGAnimatedLengthList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedLengthList {
+  [Constant]
+  readonly attribute SVGLengthList baseVal;
+  [Constant]
+  readonly attribute SVGLengthList animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedNumber.webidl b/dom/webidl/SVGAnimatedNumber.webidl
new file mode 100644
index 000000000..5908f0f86
--- /dev/null
+++ b/dom/webidl/SVGAnimatedNumber.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/types.html#InterfaceSVGAnimatedNumber
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved.
+ * W3C liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedNumber {
+           attribute float baseVal;
+  readonly attribute float animVal;
+};
diff --git a/dom/webidl/SVGAnimatedNumberList.webidl b/dom/webidl/SVGAnimatedNumberList.webidl
new file mode 100644
index 000000000..81fba2e06
--- /dev/null
+++ b/dom/webidl/SVGAnimatedNumberList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedNumberList {
+  [Constant]
+  readonly attribute SVGNumberList baseVal;
+  [Constant]
+  readonly attribute SVGNumberList animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedPathData.webidl b/dom/webidl/SVGAnimatedPathData.webidl
new file mode 100644
index 000000000..08f10f721
--- /dev/null
+++ b/dom/webidl/SVGAnimatedPathData.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGAnimatedPathData {
+  readonly attribute SVGPathSegList pathSegList;
+  //readonly attribute SVGPathSegList normalizedPathSegList;
+  readonly attribute SVGPathSegList animatedPathSegList;
+  //readonly attribute SVGPathSegList animatedNormalizedPathSegList;
+};
+
diff --git a/dom/webidl/SVGAnimatedPoints.webidl b/dom/webidl/SVGAnimatedPoints.webidl
new file mode 100644
index 000000000..891ca4bc0
--- /dev/null
+++ b/dom/webidl/SVGAnimatedPoints.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGAnimatedPoints {
+  [Constant]
+  readonly attribute SVGPointList points;
+  [Constant]
+  readonly attribute SVGPointList animatedPoints;
+};
+
diff --git a/dom/webidl/SVGAnimatedPreserveAspectRatio.webidl b/dom/webidl/SVGAnimatedPreserveAspectRatio.webidl
new file mode 100644
index 000000000..07506a5bf
--- /dev/null
+++ b/dom/webidl/SVGAnimatedPreserveAspectRatio.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedPreserveAspectRatio {
+  [Constant]
+  readonly attribute SVGPreserveAspectRatio baseVal;
+  [Constant]
+  readonly attribute SVGPreserveAspectRatio animVal;
+};
+
diff --git a/dom/webidl/SVGAnimatedRect.webidl b/dom/webidl/SVGAnimatedRect.webidl
new file mode 100644
index 000000000..fffebbe88
--- /dev/null
+++ b/dom/webidl/SVGAnimatedRect.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedRect {
+  readonly attribute SVGRect? baseVal;
+  readonly attribute SVGRect? animVal;
+};
diff --git a/dom/webidl/SVGAnimatedString.webidl b/dom/webidl/SVGAnimatedString.webidl
new file mode 100644
index 000000000..eaf3773d0
--- /dev/null
+++ b/dom/webidl/SVGAnimatedString.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedString {
+           attribute DOMString baseVal;
+  readonly attribute DOMString animVal;
+};
diff --git a/dom/webidl/SVGAnimatedTransformList.webidl b/dom/webidl/SVGAnimatedTransformList.webidl
new file mode 100644
index 000000000..3ea39d130
--- /dev/null
+++ b/dom/webidl/SVGAnimatedTransformList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimatedTransformList {
+  [Constant]
+  readonly attribute SVGTransformList baseVal;
+  [Constant]
+  readonly attribute SVGTransformList animVal;
+};
+
diff --git a/dom/webidl/SVGAnimationElement.webidl b/dom/webidl/SVGAnimationElement.webidl
new file mode 100644
index 000000000..4f9a95fe3
--- /dev/null
+++ b/dom/webidl/SVGAnimationElement.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGAnimationElement : SVGElement {
+
+  readonly attribute SVGElement? targetElement;
+
+  [Throws]
+  float getStartTime();
+  float getCurrentTime();
+  [Throws]
+  float getSimpleDuration();
+
+  [Throws]
+  void beginElement();
+  [Throws]
+  void beginElementAt(float offset);
+  [Throws]
+  void endElement();
+  [Throws]
+  void endElementAt(float offset);
+};
+
+SVGAnimationElement implements SVGTests;
+
diff --git a/dom/webidl/SVGCircleElement.webidl b/dom/webidl/SVGCircleElement.webidl
new file mode 100644
index 000000000..1fd19377a
--- /dev/null
+++ b/dom/webidl/SVGCircleElement.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGCircleElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength cx;
+  [Constant]
+  readonly attribute SVGAnimatedLength cy;
+  [Constant]
+  readonly attribute SVGAnimatedLength r;
+};
+
diff --git a/dom/webidl/SVGClipPathElement.webidl b/dom/webidl/SVGClipPathElement.webidl
new file mode 100644
index 000000000..b6c5081e4
--- /dev/null
+++ b/dom/webidl/SVGClipPathElement.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGClipPathElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration clipPathUnits;
+  [Constant]
+  readonly attribute SVGAnimatedTransformList transform;
+};
+
+SVGClipPathElement implements SVGUnitTypeValues;
+
diff --git a/dom/webidl/SVGComponentTransferFunctionElement.webidl b/dom/webidl/SVGComponentTransferFunctionElement.webidl
new file mode 100644
index 000000000..1842fe6f5
--- /dev/null
+++ b/dom/webidl/SVGComponentTransferFunctionElement.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGComponentTransferFunctionElement : SVGElement {
+  // Component Transfer Types
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN = 0;
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY = 1;
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_TABLE = 2;
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE = 3;
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_LINEAR = 4;
+  const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_GAMMA = 5;
+
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration type;
+  [Constant]
+  readonly attribute SVGAnimatedNumberList tableValues;
+  [Constant]
+  readonly attribute SVGAnimatedNumber slope;
+  [Constant]
+  readonly attribute SVGAnimatedNumber intercept;
+  [Constant]
+  readonly attribute SVGAnimatedNumber amplitude;
+  [Constant]
+  readonly attribute SVGAnimatedNumber exponent;
+  [Constant]
+  readonly attribute SVGAnimatedNumber offset;
+};
diff --git a/dom/webidl/SVGDefsElement.webidl b/dom/webidl/SVGDefsElement.webidl
new file mode 100644
index 000000000..0b37978b4
--- /dev/null
+++ b/dom/webidl/SVGDefsElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGDefsElement : SVGGraphicsElement {
+};
+
diff --git a/dom/webidl/SVGDescElement.webidl b/dom/webidl/SVGDescElement.webidl
new file mode 100644
index 000000000..1841ff545
--- /dev/null
+++ b/dom/webidl/SVGDescElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGDescElement : SVGElement {
+};
+
diff --git a/dom/webidl/SVGElement.webidl b/dom/webidl/SVGElement.webidl
new file mode 100644
index 000000000..8de42f7e5
--- /dev/null
+++ b/dom/webidl/SVGElement.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGElement : Element {
+           attribute DOMString id;
+
+  [Constant]
+  readonly attribute SVGAnimatedString className;
+  [SameObject] readonly attribute DOMStringMap dataset;
+  [PutForwards=cssText, Constant]
+  readonly attribute CSSStyleDeclaration style;
+
+  readonly attribute SVGSVGElement? ownerSVGElement;
+  readonly attribute SVGElement? viewportElement;
+
+  attribute EventHandler oncopy;
+  attribute EventHandler oncut;
+  attribute EventHandler onpaste;
+
+  [SetterThrows, Pure]
+        attribute long tabIndex;
+  [Throws] void focus();
+  [Throws] void blur();
+};
+
+SVGElement implements GlobalEventHandlers;
+SVGElement implements TouchEventHandlers;
+SVGElement implements OnErrorEventHandlerForNodes;
diff --git a/dom/webidl/SVGEllipseElement.webidl b/dom/webidl/SVGEllipseElement.webidl
new file mode 100644
index 000000000..b039a05b4
--- /dev/null
+++ b/dom/webidl/SVGEllipseElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGEllipseElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength cx;
+  [Constant]
+  readonly attribute SVGAnimatedLength cy;
+  [Constant]
+  readonly attribute SVGAnimatedLength rx;
+  [Constant]
+  readonly attribute SVGAnimatedLength ry;
+};
+
diff --git a/dom/webidl/SVGFEBlendElement.webidl b/dom/webidl/SVGFEBlendElement.webidl
new file mode 100644
index 000000000..5cd469bd5
--- /dev/null
+++ b/dom/webidl/SVGFEBlendElement.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEBlendElement : SVGElement {
+
+  // Blend Mode Types
+  const unsigned short SVG_FEBLEND_MODE_UNKNOWN = 0;
+  const unsigned short SVG_FEBLEND_MODE_NORMAL = 1;
+  const unsigned short SVG_FEBLEND_MODE_MULTIPLY = 2;
+  const unsigned short SVG_FEBLEND_MODE_SCREEN = 3;
+  const unsigned short SVG_FEBLEND_MODE_DARKEN = 4;
+  const unsigned short SVG_FEBLEND_MODE_LIGHTEN = 5;
+  const unsigned short SVG_FEBLEND_MODE_OVERLAY = 6;
+  const unsigned short SVG_FEBLEND_MODE_COLOR_DODGE = 7;
+  const unsigned short SVG_FEBLEND_MODE_COLOR_BURN = 8;
+  const unsigned short SVG_FEBLEND_MODE_HARD_LIGHT = 9;
+  const unsigned short SVG_FEBLEND_MODE_SOFT_LIGHT = 10;
+  const unsigned short SVG_FEBLEND_MODE_DIFFERENCE = 11;
+  const unsigned short SVG_FEBLEND_MODE_EXCLUSION = 12;
+  const unsigned short SVG_FEBLEND_MODE_HUE = 13;
+  const unsigned short SVG_FEBLEND_MODE_SATURATION = 14;
+  const unsigned short SVG_FEBLEND_MODE_COLOR = 15;
+  const unsigned short SVG_FEBLEND_MODE_LUMINOSITY = 16;
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedString in2;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration mode;
+};
+
+SVGFEBlendElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEColorMatrixElement.webidl b/dom/webidl/SVGFEColorMatrixElement.webidl
new file mode 100644
index 000000000..61d91040d
--- /dev/null
+++ b/dom/webidl/SVGFEColorMatrixElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEColorMatrixElement : SVGElement {
+
+  // Color Matrix Types
+  const unsigned short SVG_FECOLORMATRIX_TYPE_UNKNOWN = 0;
+  const unsigned short SVG_FECOLORMATRIX_TYPE_MATRIX = 1;
+  const unsigned short SVG_FECOLORMATRIX_TYPE_SATURATE = 2;
+  const unsigned short SVG_FECOLORMATRIX_TYPE_HUEROTATE = 3;
+  const unsigned short SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA = 4;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration type;
+  [Constant]
+  readonly attribute SVGAnimatedNumberList values;
+};
+
+SVGFEColorMatrixElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEComponentTransferElement.webidl b/dom/webidl/SVGFEComponentTransferElement.webidl
new file mode 100644
index 000000000..6cf6f6d65
--- /dev/null
+++ b/dom/webidl/SVGFEComponentTransferElement.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEComponentTransferElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+};
+
+SVGFEComponentTransferElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFECompositeElement.webidl b/dom/webidl/SVGFECompositeElement.webidl
new file mode 100644
index 000000000..3ab983fe0
--- /dev/null
+++ b/dom/webidl/SVGFECompositeElement.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFECompositeElement : SVGElement {
+
+  // Composite Operators
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_UNKNOWN = 0;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_OVER = 1;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_IN = 2;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_OUT = 3;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_ATOP = 4;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_XOR = 5;
+  const unsigned short SVG_FECOMPOSITE_OPERATOR_ARITHMETIC = 6;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedString in2;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration operator;
+  [Constant]
+  readonly attribute SVGAnimatedNumber k1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber k2;
+  [Constant]
+  readonly attribute SVGAnimatedNumber k3;
+  [Constant]
+  readonly attribute SVGAnimatedNumber k4;
+};
+
+SVGFECompositeElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEConvolveMatrixElement.webidl b/dom/webidl/SVGFEConvolveMatrixElement.webidl
new file mode 100644
index 000000000..27d8e80e7
--- /dev/null
+++ b/dom/webidl/SVGFEConvolveMatrixElement.webidl
@@ -0,0 +1,47 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEConvolveMatrixElement : SVGElement {
+
+  // Edge Mode Values
+  const unsigned short SVG_EDGEMODE_UNKNOWN = 0;
+  const unsigned short SVG_EDGEMODE_DUPLICATE = 1;
+  const unsigned short SVG_EDGEMODE_WRAP = 2;
+  const unsigned short SVG_EDGEMODE_NONE = 3;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedInteger orderX;
+  [Constant]
+  readonly attribute SVGAnimatedInteger orderY;
+  [Constant]
+  readonly attribute SVGAnimatedNumberList kernelMatrix;
+  [Constant]
+  readonly attribute SVGAnimatedNumber divisor;
+  [Constant]
+  readonly attribute SVGAnimatedNumber bias;
+  [Constant]
+  readonly attribute SVGAnimatedInteger targetX;
+  [Constant]
+  readonly attribute SVGAnimatedInteger targetY;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration edgeMode;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthY;
+  [Constant]
+  readonly attribute SVGAnimatedBoolean preserveAlpha;
+};
+
+SVGFEConvolveMatrixElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEDiffuseLightingElement.webidl b/dom/webidl/SVGFEDiffuseLightingElement.webidl
new file mode 100644
index 000000000..fb89721d8
--- /dev/null
+++ b/dom/webidl/SVGFEDiffuseLightingElement.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEDiffuseLightingElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber surfaceScale;
+  [Constant]
+  readonly attribute SVGAnimatedNumber diffuseConstant;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthY;
+};
+
+SVGFEDiffuseLightingElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEDisplacementMapElement.webidl b/dom/webidl/SVGFEDisplacementMapElement.webidl
new file mode 100644
index 000000000..461faff91
--- /dev/null
+++ b/dom/webidl/SVGFEDisplacementMapElement.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEDisplacementMapElement : SVGElement {
+
+  // Channel Selectors
+  const unsigned short SVG_CHANNEL_UNKNOWN = 0;
+  const unsigned short SVG_CHANNEL_R = 1;
+  const unsigned short SVG_CHANNEL_G = 2;
+  const unsigned short SVG_CHANNEL_B = 3;
+  const unsigned short SVG_CHANNEL_A = 4;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedString in2;
+  [Constant]
+  readonly attribute SVGAnimatedNumber scale;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration xChannelSelector;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration yChannelSelector;
+};
+
+SVGFEDisplacementMapElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEDistantLightElement.webidl b/dom/webidl/SVGFEDistantLightElement.webidl
new file mode 100644
index 000000000..933befc93
--- /dev/null
+++ b/dom/webidl/SVGFEDistantLightElement.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEDistantLightElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedNumber azimuth;
+  [Constant]
+  readonly attribute SVGAnimatedNumber elevation;
+};
diff --git a/dom/webidl/SVGFEDropShadowElement.webidl b/dom/webidl/SVGFEDropShadowElement.webidl
new file mode 100644
index 000000000..b858fc91c
--- /dev/null
+++ b/dom/webidl/SVGFEDropShadowElement.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEDropShadowElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber dx;
+  [Constant]
+  readonly attribute SVGAnimatedNumber dy;
+  [Constant]
+  readonly attribute SVGAnimatedNumber stdDeviationX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber stdDeviationY;
+
+  void setStdDeviation(float stdDeviationX, float stdDeviationY);
+};
+
+SVGFEDropShadowElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEFloodElement.webidl b/dom/webidl/SVGFEFloodElement.webidl
new file mode 100644
index 000000000..51d9539ff
--- /dev/null
+++ b/dom/webidl/SVGFEFloodElement.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEFloodElement : SVGElement {
+};
+
+SVGFEFloodElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEFuncAElement.webidl b/dom/webidl/SVGFEFuncAElement.webidl
new file mode 100644
index 000000000..97282cd19
--- /dev/null
+++ b/dom/webidl/SVGFEFuncAElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEFuncAElement : SVGComponentTransferFunctionElement {
+};
diff --git a/dom/webidl/SVGFEFuncBElement.webidl b/dom/webidl/SVGFEFuncBElement.webidl
new file mode 100644
index 000000000..8b5c2b925
--- /dev/null
+++ b/dom/webidl/SVGFEFuncBElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEFuncBElement : SVGComponentTransferFunctionElement {
+};
diff --git a/dom/webidl/SVGFEFuncGElement.webidl b/dom/webidl/SVGFEFuncGElement.webidl
new file mode 100644
index 000000000..39d2f3059
--- /dev/null
+++ b/dom/webidl/SVGFEFuncGElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEFuncGElement : SVGComponentTransferFunctionElement {
+};
diff --git a/dom/webidl/SVGFEFuncRElement.webidl b/dom/webidl/SVGFEFuncRElement.webidl
new file mode 100644
index 000000000..78e492be4
--- /dev/null
+++ b/dom/webidl/SVGFEFuncRElement.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
+ *
+ * Copyright © 2013 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEFuncRElement : SVGComponentTransferFunctionElement {
+};
diff --git a/dom/webidl/SVGFEGaussianBlurElement.webidl b/dom/webidl/SVGFEGaussianBlurElement.webidl
new file mode 100644
index 000000000..db2101b53
--- /dev/null
+++ b/dom/webidl/SVGFEGaussianBlurElement.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEGaussianBlurElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber stdDeviationX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber stdDeviationY;
+
+  void setStdDeviation(float stdDeviationX, float stdDeviationY);
+};
+
+SVGFEGaussianBlurElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEImageElement.webidl b/dom/webidl/SVGFEImageElement.webidl
new file mode 100644
index 000000000..3262c0d8a
--- /dev/null
+++ b/dom/webidl/SVGFEImageElement.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEImageElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedPreserveAspectRatio preserveAspectRatio;
+};
+
+SVGFEImageElement implements SVGFilterPrimitiveStandardAttributes;
+SVGFEImageElement implements SVGURIReference;
diff --git a/dom/webidl/SVGFEMergeElement.webidl b/dom/webidl/SVGFEMergeElement.webidl
new file mode 100644
index 000000000..adafbba9a
--- /dev/null
+++ b/dom/webidl/SVGFEMergeElement.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEMergeElement : SVGElement {
+};
+
+SVGFEMergeElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEMergeNodeElement.webidl b/dom/webidl/SVGFEMergeNodeElement.webidl
new file mode 100644
index 000000000..4ff217ba7
--- /dev/null
+++ b/dom/webidl/SVGFEMergeNodeElement.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEMergeNodeElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+};
diff --git a/dom/webidl/SVGFEMorphologyElement.webidl b/dom/webidl/SVGFEMorphologyElement.webidl
new file mode 100644
index 000000000..82910a6fa
--- /dev/null
+++ b/dom/webidl/SVGFEMorphologyElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEMorphologyElement : SVGElement {
+
+  // Morphology Operators
+  const unsigned short SVG_MORPHOLOGY_OPERATOR_UNKNOWN = 0;
+  const unsigned short SVG_MORPHOLOGY_OPERATOR_ERODE = 1;
+  const unsigned short SVG_MORPHOLOGY_OPERATOR_DILATE = 2;
+
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration operator;
+  [Constant]
+  readonly attribute SVGAnimatedNumber radiusX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber radiusY;
+};
+
+SVGFEMorphologyElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEOffsetElement.webidl b/dom/webidl/SVGFEOffsetElement.webidl
new file mode 100644
index 000000000..90132d528
--- /dev/null
+++ b/dom/webidl/SVGFEOffsetElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEOffsetElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber dx;
+  [Constant]
+  readonly attribute SVGAnimatedNumber dy;
+};
+
+SVGFEOffsetElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFEPointLightElement.webidl b/dom/webidl/SVGFEPointLightElement.webidl
new file mode 100644
index 000000000..232edc45d
--- /dev/null
+++ b/dom/webidl/SVGFEPointLightElement.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFEPointLightElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedNumber x;
+  [Constant]
+  readonly attribute SVGAnimatedNumber y;
+  [Constant]
+  readonly attribute SVGAnimatedNumber z;
+};
diff --git a/dom/webidl/SVGFESpecularLightingElement.webidl b/dom/webidl/SVGFESpecularLightingElement.webidl
new file mode 100644
index 000000000..42b6b0e9c
--- /dev/null
+++ b/dom/webidl/SVGFESpecularLightingElement.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFESpecularLightingElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+  [Constant]
+  readonly attribute SVGAnimatedNumber surfaceScale;
+  [Constant]
+  readonly attribute SVGAnimatedNumber specularConstant;
+  [Constant]
+  readonly attribute SVGAnimatedNumber specularExponent;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber kernelUnitLengthY;
+};
+
+SVGFESpecularLightingElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFESpotLightElement.webidl b/dom/webidl/SVGFESpotLightElement.webidl
new file mode 100644
index 000000000..281d20c8c
--- /dev/null
+++ b/dom/webidl/SVGFESpotLightElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFESpotLightElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedNumber x;
+  [Constant]
+  readonly attribute SVGAnimatedNumber y;
+  [Constant]
+  readonly attribute SVGAnimatedNumber z;
+  [Constant]
+  readonly attribute SVGAnimatedNumber pointsAtX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber pointsAtY;
+  [Constant]
+  readonly attribute SVGAnimatedNumber pointsAtZ;
+  [Constant]
+  readonly attribute SVGAnimatedNumber specularExponent;
+  [Constant]
+  readonly attribute SVGAnimatedNumber limitingConeAngle;
+};
diff --git a/dom/webidl/SVGFETileElement.webidl b/dom/webidl/SVGFETileElement.webidl
new file mode 100644
index 000000000..38cad6040
--- /dev/null
+++ b/dom/webidl/SVGFETileElement.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFETileElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedString in1;
+};
+
+SVGFETileElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFETurbulenceElement.webidl b/dom/webidl/SVGFETurbulenceElement.webidl
new file mode 100644
index 000000000..45c9d468b
--- /dev/null
+++ b/dom/webidl/SVGFETurbulenceElement.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFETurbulenceElement : SVGElement {
+
+  // Turbulence Types
+  const unsigned short SVG_TURBULENCE_TYPE_UNKNOWN = 0;
+  const unsigned short SVG_TURBULENCE_TYPE_FRACTALNOISE = 1;
+  const unsigned short SVG_TURBULENCE_TYPE_TURBULENCE = 2;
+
+  // Stitch Options
+  const unsigned short SVG_STITCHTYPE_UNKNOWN = 0;
+  const unsigned short SVG_STITCHTYPE_STITCH = 1;
+  const unsigned short SVG_STITCHTYPE_NOSTITCH = 2;
+
+  [Constant]
+  readonly attribute SVGAnimatedNumber baseFrequencyX;
+  [Constant]
+  readonly attribute SVGAnimatedNumber baseFrequencyY;
+  [Constant]
+  readonly attribute SVGAnimatedInteger numOctaves;
+  [Constant]
+  readonly attribute SVGAnimatedNumber seed;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration stitchTiles;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration type;
+};
+
+SVGFETurbulenceElement implements SVGFilterPrimitiveStandardAttributes;
diff --git a/dom/webidl/SVGFilterElement.webidl b/dom/webidl/SVGFilterElement.webidl
new file mode 100644
index 000000000..aa4d4d196
--- /dev/null
+++ b/dom/webidl/SVGFilterElement.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGFilterElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration filterUnits;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration primitiveUnits;
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+
+  // ImageData apply(ImageData source);
+};
+
+SVGFilterElement implements SVGURIReference;
+SVGFilterElement implements SVGUnitTypeValues;
+
diff --git a/dom/webidl/SVGFilterPrimitiveStandardAttributes.webidl b/dom/webidl/SVGFilterPrimitiveStandardAttributes.webidl
new file mode 100644
index 000000000..331950586
--- /dev/null
+++ b/dom/webidl/SVGFilterPrimitiveStandardAttributes.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGFilterPrimitiveStandardAttributes {
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+  [Constant]
+  readonly attribute SVGAnimatedString result;
+};
diff --git a/dom/webidl/SVGFitToViewBox.webidl b/dom/webidl/SVGFitToViewBox.webidl
new file mode 100644
index 000000000..881e658d2
--- /dev/null
+++ b/dom/webidl/SVGFitToViewBox.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGFitToViewBox {
+  [Constant]
+  readonly attribute SVGAnimatedRect viewBox;
+  [Constant]
+  readonly attribute SVGAnimatedPreserveAspectRatio preserveAspectRatio;
+};
+
diff --git a/dom/webidl/SVGForeignObjectElement.webidl b/dom/webidl/SVGForeignObjectElement.webidl
new file mode 100644
index 000000000..6829f4501
--- /dev/null
+++ b/dom/webidl/SVGForeignObjectElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGForeignObjectElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+};
+
diff --git a/dom/webidl/SVGGElement.webidl b/dom/webidl/SVGGElement.webidl
new file mode 100644
index 000000000..8d690677e
--- /dev/null
+++ b/dom/webidl/SVGGElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGGElement : SVGGraphicsElement {
+};
+
diff --git a/dom/webidl/SVGGradientElement.webidl b/dom/webidl/SVGGradientElement.webidl
new file mode 100644
index 000000000..e1e969061
--- /dev/null
+++ b/dom/webidl/SVGGradientElement.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGGradientElement : SVGElement {
+
+  // Spread Method Types
+  const unsigned short SVG_SPREADMETHOD_UNKNOWN = 0;
+  const unsigned short SVG_SPREADMETHOD_PAD = 1;
+  const unsigned short SVG_SPREADMETHOD_REFLECT = 2;
+  const unsigned short SVG_SPREADMETHOD_REPEAT = 3;
+
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration gradientUnits;
+  [Constant]
+  readonly attribute SVGAnimatedTransformList gradientTransform;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration spreadMethod;
+};
+
+SVGGradientElement implements SVGURIReference;
+SVGGradientElement implements SVGUnitTypeValues;
diff --git a/dom/webidl/SVGGraphicsElement.webidl b/dom/webidl/SVGGraphicsElement.webidl
new file mode 100644
index 000000000..74af1f673
--- /dev/null
+++ b/dom/webidl/SVGGraphicsElement.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary SVGBoundingBoxOptions {
+  boolean fill = true;
+  boolean stroke = false;
+  boolean markers = false;
+  boolean clipped = false;
+};
+
+interface SVGGraphicsElement : SVGElement {
+  readonly attribute SVGAnimatedTransformList transform;
+
+  readonly attribute SVGElement? nearestViewportElement;
+  readonly attribute SVGElement? farthestViewportElement;
+
+  [NewObject, Throws]
+  SVGRect getBBox(optional SVGBoundingBoxOptions aOptions);
+  // Not implemented
+  // SVGRect getStrokeBBox();
+  SVGMatrix? getCTM();
+  SVGMatrix? getScreenCTM();
+  [Throws]
+  SVGMatrix getTransformToElement(SVGGraphicsElement element);
+};
+
+SVGGraphicsElement implements SVGTests;
diff --git a/dom/webidl/SVGImageElement.webidl b/dom/webidl/SVGImageElement.webidl
new file mode 100644
index 000000000..67dab60f5
--- /dev/null
+++ b/dom/webidl/SVGImageElement.webidl
@@ -0,0 +1,28 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGImageElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+  [Constant]
+  readonly attribute SVGAnimatedPreserveAspectRatio preserveAspectRatio;
+};
+
+SVGImageElement implements MozImageLoadingContent;
+SVGImageElement implements SVGURIReference;
+
diff --git a/dom/webidl/SVGLength.webidl b/dom/webidl/SVGLength.webidl
new file mode 100644
index 000000000..6d56132db
--- /dev/null
+++ b/dom/webidl/SVGLength.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGLength {
+
+  // Length Unit Types
+  const unsigned short SVG_LENGTHTYPE_UNKNOWN = 0;
+  const unsigned short SVG_LENGTHTYPE_NUMBER = 1;
+  const unsigned short SVG_LENGTHTYPE_PERCENTAGE = 2;
+  const unsigned short SVG_LENGTHTYPE_EMS = 3;
+  const unsigned short SVG_LENGTHTYPE_EXS = 4;
+  const unsigned short SVG_LENGTHTYPE_PX = 5;
+  const unsigned short SVG_LENGTHTYPE_CM = 6;
+  const unsigned short SVG_LENGTHTYPE_MM = 7;
+  const unsigned short SVG_LENGTHTYPE_IN = 8;
+  const unsigned short SVG_LENGTHTYPE_PT = 9;
+  const unsigned short SVG_LENGTHTYPE_PC = 10;
+
+  readonly attribute unsigned short unitType;
+  [Throws]
+           attribute float value;
+  [SetterThrows]
+           attribute float valueInSpecifiedUnits;
+  [SetterThrows]
+           attribute DOMString valueAsString;
+
+  [Throws]
+  void newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits);
+  [Throws]
+  void convertToSpecifiedUnits(unsigned short unitType);
+};
diff --git a/dom/webidl/SVGLengthList.webidl b/dom/webidl/SVGLengthList.webidl
new file mode 100644
index 000000000..c4fab44e4
--- /dev/null
+++ b/dom/webidl/SVGLengthList.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG11/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGLengthList {
+  readonly attribute unsigned long numberOfItems;
+  [Throws]
+  void clear();
+  [Throws]
+  SVGLength initialize(SVGLength newItem);
+  [Throws]
+  getter SVGLength getItem(unsigned long index);
+  [Throws]
+  SVGLength insertItemBefore(SVGLength newItem, unsigned long index);
+  [Throws]
+  SVGLength replaceItem(SVGLength newItem, unsigned long index);
+  [Throws]
+  SVGLength removeItem(unsigned long index);
+  [Throws]
+  SVGLength appendItem(SVGLength newItem);
+
+  // Mozilla-specific stuff
+  readonly attribute unsigned long length; // synonym for numberOfItems
+};
diff --git a/dom/webidl/SVGLineElement.webidl b/dom/webidl/SVGLineElement.webidl
new file mode 100644
index 000000000..a03920d60
--- /dev/null
+++ b/dom/webidl/SVGLineElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGLineElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x1;
+  [Constant]
+  readonly attribute SVGAnimatedLength y1;
+  [Constant]
+  readonly attribute SVGAnimatedLength x2;
+  [Constant]
+  readonly attribute SVGAnimatedLength y2;
+};
+
diff --git a/dom/webidl/SVGLinearGradientElement.webidl b/dom/webidl/SVGLinearGradientElement.webidl
new file mode 100644
index 000000000..200bc47e6
--- /dev/null
+++ b/dom/webidl/SVGLinearGradientElement.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGLinearGradientElement : SVGGradientElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x1;
+  [Constant]
+  readonly attribute SVGAnimatedLength y1;
+  [Constant]
+  readonly attribute SVGAnimatedLength x2;
+  [Constant]
+  readonly attribute SVGAnimatedLength y2;
+};
diff --git a/dom/webidl/SVGMPathElement.webidl b/dom/webidl/SVGMPathElement.webidl
new file mode 100644
index 000000000..7165b6cf7
--- /dev/null
+++ b/dom/webidl/SVGMPathElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGMPathElement : SVGElement {
+};
+
+SVGMPathElement implements SVGURIReference;
+
diff --git a/dom/webidl/SVGMarkerElement.webidl b/dom/webidl/SVGMarkerElement.webidl
new file mode 100644
index 000000000..a4f819b2d
--- /dev/null
+++ b/dom/webidl/SVGMarkerElement.webidl
@@ -0,0 +1,46 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGMarkerElement : SVGElement {
+
+  // Marker Unit Types
+  const unsigned short SVG_MARKERUNITS_UNKNOWN = 0;
+  const unsigned short SVG_MARKERUNITS_USERSPACEONUSE = 1;
+  const unsigned short SVG_MARKERUNITS_STROKEWIDTH = 2;
+
+  // Marker Orientation Types
+  const unsigned short SVG_MARKER_ORIENT_UNKNOWN = 0;
+  const unsigned short SVG_MARKER_ORIENT_AUTO = 1;
+  const unsigned short SVG_MARKER_ORIENT_ANGLE = 2;
+
+  [Constant]
+  readonly attribute SVGAnimatedLength refX;
+  [Constant]
+  readonly attribute SVGAnimatedLength refY;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration markerUnits;
+  [Constant]
+  readonly attribute SVGAnimatedLength markerWidth;
+  [Constant]
+  readonly attribute SVGAnimatedLength markerHeight;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration orientType;
+  [Constant]
+  readonly attribute SVGAnimatedAngle orientAngle;
+
+  void setOrientToAuto();
+  [Throws]
+  void setOrientToAngle(SVGAngle angle);
+};
+
+SVGMarkerElement implements SVGFitToViewBox;
+
diff --git a/dom/webidl/SVGMaskElement.webidl b/dom/webidl/SVGMaskElement.webidl
new file mode 100644
index 000000000..3b00b0d55
--- /dev/null
+++ b/dom/webidl/SVGMaskElement.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGMaskElement : SVGElement {
+
+  // Mask Types
+  const unsigned short SVG_MASKTYPE_LUMINANCE = 0;
+  const unsigned short SVG_MASKTYPE_ALPHA = 1;
+
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration maskUnits;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration maskContentUnits;
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+};
+
+SVGMaskElement implements SVGUnitTypeValues;
+
diff --git a/dom/webidl/SVGMatrix.webidl b/dom/webidl/SVGMatrix.webidl
new file mode 100644
index 000000000..3ede75cc7
--- /dev/null
+++ b/dom/webidl/SVGMatrix.webidl
@@ -0,0 +1,51 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGMatrix {
+
+  [SetterThrows]
+  attribute float a;
+  [SetterThrows]
+  attribute float b;
+  [SetterThrows]
+  attribute float c;
+  [SetterThrows]
+  attribute float d;
+  [SetterThrows]
+  attribute float e;
+  [SetterThrows]
+  attribute float f;
+
+  [NewObject]
+  SVGMatrix multiply(SVGMatrix secondMatrix);
+  [NewObject, Throws]
+  SVGMatrix inverse();
+  [NewObject]
+  SVGMatrix translate(float x, float y);
+  [NewObject]
+  SVGMatrix scale(float scaleFactor);
+  [NewObject]
+  SVGMatrix scaleNonUniform(float scaleFactorX, float scaleFactorY);
+  [NewObject]
+  SVGMatrix rotate(float angle);
+  [NewObject, Throws]
+  SVGMatrix rotateFromVector(float x, float y);
+  [NewObject]
+  SVGMatrix flipX();
+  [NewObject]
+  SVGMatrix flipY();
+  [NewObject, Throws]
+  SVGMatrix skewX(float angle);
+  [NewObject, Throws]
+  SVGMatrix skewY(float angle);
+};
+
diff --git a/dom/webidl/SVGMetadataElement.webidl b/dom/webidl/SVGMetadataElement.webidl
new file mode 100644
index 000000000..1c404f91f
--- /dev/null
+++ b/dom/webidl/SVGMetadataElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGMetadataElement : SVGElement {
+};
+
diff --git a/dom/webidl/SVGNumber.webidl b/dom/webidl/SVGNumber.webidl
new file mode 100644
index 000000000..01011e6a6
--- /dev/null
+++ b/dom/webidl/SVGNumber.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor,
+ Constructor(float value)]
+interface SVGNumber {
+  [SetterThrows]
+  attribute float value;
+};
diff --git a/dom/webidl/SVGNumberList.webidl b/dom/webidl/SVGNumberList.webidl
new file mode 100644
index 000000000..b4247d337
--- /dev/null
+++ b/dom/webidl/SVGNumberList.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG11/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGNumberList {
+  readonly attribute unsigned long numberOfItems;
+  [Throws]
+  void clear();
+  [Throws]
+  SVGNumber initialize(SVGNumber newItem);
+  [Throws]
+  getter SVGNumber getItem(unsigned long index);
+  [Throws]
+  SVGNumber insertItemBefore(SVGNumber newItem, unsigned long index);
+  [Throws]
+  SVGNumber replaceItem(SVGNumber newItem, unsigned long index);
+  [Throws]
+  SVGNumber removeItem(unsigned long index);
+  [Throws]
+  SVGNumber appendItem(SVGNumber newItem);
+
+  // Mozilla-specific stuff
+  readonly attribute unsigned long length; // synonym for numberOfItems
+};
diff --git a/dom/webidl/SVGPathElement.webidl b/dom/webidl/SVGPathElement.webidl
new file mode 100644
index 000000000..08a9904ec
--- /dev/null
+++ b/dom/webidl/SVGPathElement.webidl
@@ -0,0 +1,62 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+interface SVGPathElement : SVGGraphicsElement {
+
+  [Constant]
+  readonly attribute SVGAnimatedNumber pathLength;
+
+  float getTotalLength();
+  [NewObject, Throws]
+  SVGPoint getPointAtLength(float distance);
+  unsigned long getPathSegAtLength(float distance);
+  [NewObject]
+  SVGPathSegClosePath createSVGPathSegClosePath();
+  [NewObject]
+  SVGPathSegMovetoAbs createSVGPathSegMovetoAbs(float x, float y);
+  [NewObject]
+  SVGPathSegMovetoRel createSVGPathSegMovetoRel(float x, float y);
+  [NewObject]
+  SVGPathSegLinetoAbs createSVGPathSegLinetoAbs(float x, float y);
+  [NewObject]
+  SVGPathSegLinetoRel createSVGPathSegLinetoRel(float x, float y);
+  [NewObject]
+  SVGPathSegCurvetoCubicAbs createSVGPathSegCurvetoCubicAbs(float x, float y, float x1, float y1, float x2, float y2);
+  [NewObject]
+  SVGPathSegCurvetoCubicRel createSVGPathSegCurvetoCubicRel(float x, float y, float x1, float y1, float x2, float y2);
+  [NewObject]
+  SVGPathSegCurvetoQuadraticAbs createSVGPathSegCurvetoQuadraticAbs(float x, float y, float x1, float y1);
+  [NewObject]
+  SVGPathSegCurvetoQuadraticRel createSVGPathSegCurvetoQuadraticRel(float x, float y, float x1, float y1);
+  [NewObject]
+  SVGPathSegArcAbs createSVGPathSegArcAbs(float x, float y, float r1, float r2, float angle, boolean largeArcFlag, boolean sweepFlag);
+  [NewObject]
+  SVGPathSegArcRel createSVGPathSegArcRel(float x, float y, float r1, float r2, float angle, boolean largeArcFlag, boolean sweepFlag);
+  [NewObject]
+  SVGPathSegLinetoHorizontalAbs createSVGPathSegLinetoHorizontalAbs(float x);
+  [NewObject]
+  SVGPathSegLinetoHorizontalRel createSVGPathSegLinetoHorizontalRel(float x);
+  [NewObject]
+  SVGPathSegLinetoVerticalAbs createSVGPathSegLinetoVerticalAbs(float y);
+  [NewObject]
+  SVGPathSegLinetoVerticalRel createSVGPathSegLinetoVerticalRel(float y);
+  [NewObject]
+  SVGPathSegCurvetoCubicSmoothAbs createSVGPathSegCurvetoCubicSmoothAbs(float x, float y, float x2, float y2);
+  [NewObject]
+  SVGPathSegCurvetoCubicSmoothRel createSVGPathSegCurvetoCubicSmoothRel(float x, float y, float x2, float y2);
+  [NewObject]
+  SVGPathSegCurvetoQuadraticSmoothAbs createSVGPathSegCurvetoQuadraticSmoothAbs(float x, float y);
+  [NewObject]
+  SVGPathSegCurvetoQuadraticSmoothRel createSVGPathSegCurvetoQuadraticSmoothRel(float x, float y);
+};
+
+SVGPathElement implements SVGAnimatedPathData;
+
diff --git a/dom/webidl/SVGPathSeg.webidl b/dom/webidl/SVGPathSeg.webidl
new file mode 100644
index 000000000..b5ff1abd6
--- /dev/null
+++ b/dom/webidl/SVGPathSeg.webidl
@@ -0,0 +1,215 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPathSeg {
+
+  // Path Segment Types
+  const unsigned short PATHSEG_UNKNOWN = 0;
+  const unsigned short PATHSEG_CLOSEPATH = 1;
+  const unsigned short PATHSEG_MOVETO_ABS = 2;
+  const unsigned short PATHSEG_MOVETO_REL = 3;
+  const unsigned short PATHSEG_LINETO_ABS = 4;
+  const unsigned short PATHSEG_LINETO_REL = 5;
+  const unsigned short PATHSEG_CURVETO_CUBIC_ABS = 6;
+  const unsigned short PATHSEG_CURVETO_CUBIC_REL = 7;
+  const unsigned short PATHSEG_CURVETO_QUADRATIC_ABS = 8;
+  const unsigned short PATHSEG_CURVETO_QUADRATIC_REL = 9;
+  const unsigned short PATHSEG_ARC_ABS = 10;
+  const unsigned short PATHSEG_ARC_REL = 11;
+  const unsigned short PATHSEG_LINETO_HORIZONTAL_ABS = 12;
+  const unsigned short PATHSEG_LINETO_HORIZONTAL_REL = 13;
+  const unsigned short PATHSEG_LINETO_VERTICAL_ABS = 14;
+  const unsigned short PATHSEG_LINETO_VERTICAL_REL = 15;
+  const unsigned short PATHSEG_CURVETO_CUBIC_SMOOTH_ABS = 16;
+  const unsigned short PATHSEG_CURVETO_CUBIC_SMOOTH_REL = 17;
+  const unsigned short PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS = 18;
+  const unsigned short PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL = 19;
+
+  [Pure]
+  readonly attribute unsigned short pathSegType;
+  [Pure]
+  readonly attribute DOMString pathSegTypeAsLetter;
+};
+
+interface SVGPathSegClosePath : SVGPathSeg {
+};
+
+interface SVGPathSegMovetoAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegMovetoRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegLinetoAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegLinetoRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegCurvetoCubicAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x1;
+  [SetterThrows]
+  attribute float y1;
+  [SetterThrows]
+  attribute float x2;
+  [SetterThrows]
+  attribute float y2;
+};
+
+interface SVGPathSegCurvetoCubicRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x1;
+  [SetterThrows]
+  attribute float y1;
+  [SetterThrows]
+  attribute float x2;
+  [SetterThrows]
+  attribute float y2;
+};
+
+interface SVGPathSegCurvetoQuadraticAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x1;
+  [SetterThrows]
+  attribute float y1;
+};
+
+interface SVGPathSegCurvetoQuadraticRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x1;
+  [SetterThrows]
+  attribute float y1;
+};
+
+interface SVGPathSegArcAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float r1;
+  [SetterThrows]
+  attribute float r2;
+  [SetterThrows]
+  attribute float angle;
+  [SetterThrows]
+  attribute boolean largeArcFlag;
+  [SetterThrows]
+  attribute boolean sweepFlag;
+};
+
+interface SVGPathSegArcRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float r1;
+  [SetterThrows]
+  attribute float r2;
+  [SetterThrows]
+  attribute float angle;
+  [SetterThrows]
+  attribute boolean largeArcFlag;
+  [SetterThrows]
+  attribute boolean sweepFlag;
+};
+
+interface SVGPathSegLinetoHorizontalAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+};
+
+interface SVGPathSegLinetoHorizontalRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+};
+
+interface SVGPathSegLinetoVerticalAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegLinetoVerticalRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegCurvetoCubicSmoothAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x2;
+  [SetterThrows]
+  attribute float y2;
+};
+
+interface SVGPathSegCurvetoCubicSmoothRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float x2;
+  [SetterThrows]
+  attribute float y2;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothAbs : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
+interface SVGPathSegCurvetoQuadraticSmoothRel : SVGPathSeg {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+};
+
diff --git a/dom/webidl/SVGPathSegList.webidl b/dom/webidl/SVGPathSegList.webidl
new file mode 100644
index 000000000..49d22e5af
--- /dev/null
+++ b/dom/webidl/SVGPathSegList.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG11/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPathSegList {
+  readonly attribute unsigned long numberOfItems;
+  [Throws]
+  void clear();
+  [Throws]
+  SVGPathSeg initialize(SVGPathSeg newItem);
+  [Throws]
+  getter SVGPathSeg getItem(unsigned long index);
+  [Throws]
+  SVGPathSeg insertItemBefore(SVGPathSeg newItem, unsigned long index);
+  [Throws]
+  SVGPathSeg replaceItem(SVGPathSeg newItem, unsigned long index);
+  [Throws]
+  SVGPathSeg removeItem(unsigned long index);
+  [Throws]
+  SVGPathSeg appendItem(SVGPathSeg newItem);
+
+  // Mozilla-specific stuff
+  readonly attribute unsigned long length; // synonym for numberOfItems
+};
diff --git a/dom/webidl/SVGPatternElement.webidl b/dom/webidl/SVGPatternElement.webidl
new file mode 100644
index 000000000..2a549799e
--- /dev/null
+++ b/dom/webidl/SVGPatternElement.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/pservers.html#InterfaceSVGPatternElement
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPatternElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration patternUnits;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration patternContentUnits;
+  [Constant]
+  readonly attribute SVGAnimatedTransformList patternTransform;
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+};
+
+SVGPatternElement implements SVGFitToViewBox;
+SVGPatternElement implements SVGURIReference;
+SVGPatternElement implements SVGUnitTypeValues;
diff --git a/dom/webidl/SVGPoint.webidl b/dom/webidl/SVGPoint.webidl
new file mode 100644
index 000000000..c8113d40b
--- /dev/null
+++ b/dom/webidl/SVGPoint.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPoint {
+
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+
+  [NewObject]
+  SVGPoint matrixTransform(SVGMatrix matrix);
+};
+
diff --git a/dom/webidl/SVGPointList.webidl b/dom/webidl/SVGPointList.webidl
new file mode 100644
index 000000000..2bc553855
--- /dev/null
+++ b/dom/webidl/SVGPointList.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG11/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPointList {
+  readonly attribute unsigned long numberOfItems;
+  [Throws]
+  void clear();
+  [Throws]
+  SVGPoint initialize(SVGPoint newItem);
+  [Throws]
+  getter SVGPoint getItem(unsigned long index);
+  [Throws]
+  SVGPoint insertItemBefore(SVGPoint newItem, unsigned long index);
+  [Throws]
+  SVGPoint replaceItem(SVGPoint newItem, unsigned long index);
+  [Throws]
+  SVGPoint removeItem(unsigned long index);
+  [Throws]
+  SVGPoint appendItem(SVGPoint newItem);
+
+  // Mozilla-specific stuff
+  readonly attribute unsigned long length; // synonym for numberOfItems
+};
diff --git a/dom/webidl/SVGPolygonElement.webidl b/dom/webidl/SVGPolygonElement.webidl
new file mode 100644
index 000000000..6c720c931
--- /dev/null
+++ b/dom/webidl/SVGPolygonElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPolygonElement : SVGGraphicsElement {
+};
+
+SVGPolygonElement implements SVGAnimatedPoints;
+
diff --git a/dom/webidl/SVGPolylineElement.webidl b/dom/webidl/SVGPolylineElement.webidl
new file mode 100644
index 000000000..ca2df3a08
--- /dev/null
+++ b/dom/webidl/SVGPolylineElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPolylineElement : SVGGraphicsElement {
+};
+
+SVGPolylineElement implements SVGAnimatedPoints;
+
diff --git a/dom/webidl/SVGPreserveAspectRatio.webidl b/dom/webidl/SVGPreserveAspectRatio.webidl
new file mode 100644
index 000000000..2a9db63f5
--- /dev/null
+++ b/dom/webidl/SVGPreserveAspectRatio.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGPreserveAspectRatio {
+
+  // Alignment Types
+  const unsigned short SVG_PRESERVEASPECTRATIO_UNKNOWN = 0;
+  const unsigned short SVG_PRESERVEASPECTRATIO_NONE = 1;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMINYMIN = 2;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMIDYMIN = 3;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMAXYMIN = 4;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMINYMID = 5;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMIDYMID = 6;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMAXYMID = 7;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMINYMAX = 8;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMIDYMAX = 9;
+  const unsigned short SVG_PRESERVEASPECTRATIO_XMAXYMAX = 10;
+
+  // Meet-or-slice Types
+  const unsigned short SVG_MEETORSLICE_UNKNOWN = 0;
+  const unsigned short SVG_MEETORSLICE_MEET = 1;
+  const unsigned short SVG_MEETORSLICE_SLICE = 2;
+
+  [SetterThrows]
+  attribute unsigned short align;
+  [SetterThrows]
+  attribute unsigned short meetOrSlice;
+};
+
diff --git a/dom/webidl/SVGRadialGradientElement.webidl b/dom/webidl/SVGRadialGradientElement.webidl
new file mode 100644
index 000000000..8d7ce9016
--- /dev/null
+++ b/dom/webidl/SVGRadialGradientElement.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGRadialGradientElement : SVGGradientElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength cx;
+  [Constant]
+  readonly attribute SVGAnimatedLength cy;
+  [Constant]
+  readonly attribute SVGAnimatedLength r;
+  [Constant]
+  readonly attribute SVGAnimatedLength fx;
+  [Constant]
+  readonly attribute SVGAnimatedLength fy;
+  // XXX: Bug 1242048
+  // [SameObject]
+  readonly attribute SVGAnimatedLength fr;
+};
diff --git a/dom/webidl/SVGRect.webidl b/dom/webidl/SVGRect.webidl
new file mode 100644
index 000000000..0edda0640
--- /dev/null
+++ b/dom/webidl/SVGRect.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGRect {
+  [SetterThrows]
+  attribute float x;
+  [SetterThrows]
+  attribute float y;
+  [SetterThrows]
+  attribute float width;
+  [SetterThrows]
+  attribute float height;
+};
diff --git a/dom/webidl/SVGRectElement.webidl b/dom/webidl/SVGRectElement.webidl
new file mode 100644
index 000000000..03028f2a2
--- /dev/null
+++ b/dom/webidl/SVGRectElement.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGRectElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+  [Constant]
+  readonly attribute SVGAnimatedLength rx;
+  [Constant]
+  readonly attribute SVGAnimatedLength ry;
+};
+
diff --git a/dom/webidl/SVGSVGElement.webidl b/dom/webidl/SVGSVGElement.webidl
new file mode 100644
index 000000000..afe63dbb2
--- /dev/null
+++ b/dom/webidl/SVGSVGElement.webidl
@@ -0,0 +1,80 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGViewSpec;
+
+interface SVGSVGElement : SVGGraphicsElement {
+
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+  // readonly attribute SVGRect viewport;
+  [Constant]
+  readonly attribute float pixelUnitToMillimeterX;
+  [Constant]
+  readonly attribute float pixelUnitToMillimeterY;
+  [Constant]
+  readonly attribute float screenPixelToMillimeterX;
+  [Constant]
+  readonly attribute float screenPixelToMillimeterY;
+  readonly attribute boolean useCurrentView;
+  // readonly attribute SVGViewSpec currentView;
+  [UseCounter]
+           attribute float currentScale;
+  readonly attribute SVGPoint currentTranslate;
+
+  [DependsOn=Nothing, Affects=Nothing]
+  unsigned long suspendRedraw(unsigned long maxWaitMilliseconds);
+  [DependsOn=Nothing, Affects=Nothing]
+  void unsuspendRedraw(unsigned long suspendHandleID);
+  [DependsOn=Nothing, Affects=Nothing]
+  void unsuspendRedrawAll();
+  [DependsOn=Nothing, Affects=Nothing]
+  void forceRedraw();
+  void pauseAnimations();
+  void unpauseAnimations();
+  boolean animationsPaused();
+  float getCurrentTime();
+  void setCurrentTime(float seconds);
+  // NodeList getIntersectionList(SVGRect rect, SVGElement referenceElement);
+  // NodeList getEnclosureList(SVGRect rect, SVGElement referenceElement);
+  // boolean checkIntersection(SVGElement element, SVGRect rect);
+  // boolean checkEnclosure(SVGElement element, SVGRect rect);
+  void deselectAll();
+  [NewObject]
+  SVGNumber createSVGNumber();
+  [NewObject]
+  SVGLength createSVGLength();
+  [NewObject]
+  SVGAngle createSVGAngle();
+  [NewObject]
+  SVGPoint createSVGPoint();
+  [NewObject]
+  SVGMatrix createSVGMatrix();
+  [NewObject]
+  SVGRect createSVGRect();
+  [NewObject]
+  SVGTransform createSVGTransform();
+  [NewObject]
+  SVGTransform createSVGTransformFromMatrix(SVGMatrix matrix);
+  [UseCounter]
+  Element? getElementById(DOMString elementId);
+};
+
+SVGSVGElement implements SVGFitToViewBox;
+SVGSVGElement implements SVGZoomAndPanValues;
+
diff --git a/dom/webidl/SVGScriptElement.webidl b/dom/webidl/SVGScriptElement.webidl
new file mode 100644
index 000000000..41bbe065b
--- /dev/null
+++ b/dom/webidl/SVGScriptElement.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGScriptElement : SVGElement {
+  [SetterThrows]
+  attribute DOMString type;
+
+  // CORS attribute
+  [SetterThrows]
+  attribute DOMString? crossOrigin;
+};
+
+SVGScriptElement implements SVGURIReference;
+
diff --git a/dom/webidl/SVGSetElement.webidl b/dom/webidl/SVGSetElement.webidl
new file mode 100644
index 000000000..8b816fa75
--- /dev/null
+++ b/dom/webidl/SVGSetElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGSetElement : SVGAnimationElement {
+};
+
diff --git a/dom/webidl/SVGStopElement.webidl b/dom/webidl/SVGStopElement.webidl
new file mode 100644
index 000000000..d75e52b73
--- /dev/null
+++ b/dom/webidl/SVGStopElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGStopElement : SVGElement {
+  [Constant]
+  readonly attribute SVGAnimatedNumber offset;
+};
+
diff --git a/dom/webidl/SVGStringList.webidl b/dom/webidl/SVGStringList.webidl
new file mode 100644
index 000000000..ad7288fe1
--- /dev/null
+++ b/dom/webidl/SVGStringList.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGStringList {
+  readonly attribute unsigned long length;
+  readonly attribute unsigned long numberOfItems;
+
+  void clear();
+  [Throws]
+  DOMString initialize(DOMString newItem);
+  [Throws]
+  DOMString getItem(unsigned long index);
+  getter DOMString(unsigned long index);
+  [Throws]
+  DOMString insertItemBefore(DOMString newItem, unsigned long index);
+  [Throws]
+  DOMString replaceItem(DOMString newItem, unsigned long index);
+  [Throws]
+  DOMString removeItem(unsigned long index);
+  [Throws]
+  DOMString appendItem(DOMString newItem);
+  //setter void (unsigned long index, DOMString newItem);
+};
diff --git a/dom/webidl/SVGStyleElement.webidl b/dom/webidl/SVGStyleElement.webidl
new file mode 100644
index 000000000..d66b2ed6e
--- /dev/null
+++ b/dom/webidl/SVGStyleElement.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGStyleElement : SVGElement {
+  [SetterThrows]
+  attribute DOMString xmlspace; // Spec claims this should be on SVGElement
+  [SetterThrows]
+  attribute DOMString type;
+  [SetterThrows]
+  attribute DOMString media;
+  [SetterThrows]
+  attribute DOMString title;
+  [SetterThrows]
+  attribute boolean scoped;
+};
+SVGStyleElement implements LinkStyle;
+
diff --git a/dom/webidl/SVGSwitchElement.webidl b/dom/webidl/SVGSwitchElement.webidl
new file mode 100644
index 000000000..43cdb6861
--- /dev/null
+++ b/dom/webidl/SVGSwitchElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGSwitchElement : SVGGraphicsElement {
+};
+
diff --git a/dom/webidl/SVGSymbolElement.webidl b/dom/webidl/SVGSymbolElement.webidl
new file mode 100644
index 000000000..ece2c5a3f
--- /dev/null
+++ b/dom/webidl/SVGSymbolElement.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/struct.html#InterfaceSVGSymbolElement
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGSymbolElement : SVGElement {
+};
+
+SVGSymbolElement implements SVGFitToViewBox;
+SVGSymbolElement implements SVGTests;
diff --git a/dom/webidl/SVGTSpanElement.webidl b/dom/webidl/SVGTSpanElement.webidl
new file mode 100644
index 000000000..a6d944450
--- /dev/null
+++ b/dom/webidl/SVGTSpanElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTSpanElement : SVGTextPositioningElement {
+};
+
diff --git a/dom/webidl/SVGTests.webidl b/dom/webidl/SVGTests.webidl
new file mode 100644
index 000000000..e3c38242b
--- /dev/null
+++ b/dom/webidl/SVGTests.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGTests {
+
+  readonly attribute SVGStringList requiredFeatures;
+  readonly attribute SVGStringList requiredExtensions;
+  readonly attribute SVGStringList systemLanguage;
+
+  boolean hasExtension(DOMString extension);
+};
+
diff --git a/dom/webidl/SVGTextContentElement.webidl b/dom/webidl/SVGTextContentElement.webidl
new file mode 100644
index 000000000..15ec96373
--- /dev/null
+++ b/dom/webidl/SVGTextContentElement.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTextContentElement : SVGGraphicsElement {
+
+  // lengthAdjust Types
+  const unsigned short LENGTHADJUST_UNKNOWN = 0;
+  const unsigned short LENGTHADJUST_SPACING = 1;
+  const unsigned short LENGTHADJUST_SPACINGANDGLYPHS = 2;
+
+  [Constant]
+  readonly attribute SVGAnimatedLength textLength;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration lengthAdjust;
+
+  long getNumberOfChars();
+  float getComputedTextLength();
+  [Throws]
+  float getSubStringLength(unsigned long charnum, unsigned long nchars);
+  [Throws]
+  SVGPoint getStartPositionOfChar(unsigned long charnum);
+  [Throws]
+  SVGPoint getEndPositionOfChar(unsigned long charnum);
+  [NewObject, Throws]
+  SVGRect getExtentOfChar(unsigned long charnum);
+  [Throws]
+  float getRotationOfChar(unsigned long charnum);
+  long getCharNumAtPosition(SVGPoint point);
+  [Throws]
+  void selectSubString(unsigned long charnum, unsigned long nchars);
+};
+
+
diff --git a/dom/webidl/SVGTextElement.webidl b/dom/webidl/SVGTextElement.webidl
new file mode 100644
index 000000000..042326de2
--- /dev/null
+++ b/dom/webidl/SVGTextElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTextElement : SVGTextPositioningElement {
+};
+
diff --git a/dom/webidl/SVGTextPathElement.webidl b/dom/webidl/SVGTextPathElement.webidl
new file mode 100644
index 000000000..73a50f3ff
--- /dev/null
+++ b/dom/webidl/SVGTextPathElement.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTextPathElement : SVGTextContentElement {
+
+  // textPath Method Types
+  const unsigned short TEXTPATH_METHODTYPE_UNKNOWN = 0;
+  const unsigned short TEXTPATH_METHODTYPE_ALIGN = 1;
+  const unsigned short TEXTPATH_METHODTYPE_STRETCH = 2;
+
+  // textPath Spacing Types
+  const unsigned short TEXTPATH_SPACINGTYPE_UNKNOWN = 0;
+  const unsigned short TEXTPATH_SPACINGTYPE_AUTO = 1;
+  const unsigned short TEXTPATH_SPACINGTYPE_EXACT = 2;
+
+  [Constant]
+  readonly attribute SVGAnimatedLength startOffset;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration method;
+  [Constant]
+  readonly attribute SVGAnimatedEnumeration spacing;
+};
+
+SVGTextPathElement implements SVGURIReference;
+
diff --git a/dom/webidl/SVGTextPositioningElement.webidl b/dom/webidl/SVGTextPositioningElement.webidl
new file mode 100644
index 000000000..80b8b94fa
--- /dev/null
+++ b/dom/webidl/SVGTextPositioningElement.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTextPositioningElement : SVGTextContentElement {
+  [Constant]
+  readonly attribute SVGAnimatedLengthList x;
+  [Constant]
+  readonly attribute SVGAnimatedLengthList y;
+  [Constant]
+  readonly attribute SVGAnimatedLengthList dx;
+  [Constant]
+  readonly attribute SVGAnimatedLengthList dy;
+  [Constant]
+  readonly attribute SVGAnimatedNumberList rotate;
+};
+
diff --git a/dom/webidl/SVGTitleElement.webidl b/dom/webidl/SVGTitleElement.webidl
new file mode 100644
index 000000000..d40c63373
--- /dev/null
+++ b/dom/webidl/SVGTitleElement.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTitleElement : SVGElement {
+};
+
diff --git a/dom/webidl/SVGTransform.webidl b/dom/webidl/SVGTransform.webidl
new file mode 100644
index 000000000..488fb8d07
--- /dev/null
+++ b/dom/webidl/SVGTransform.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTransform {
+
+  // Transform Types
+  const unsigned short SVG_TRANSFORM_UNKNOWN = 0;
+  const unsigned short SVG_TRANSFORM_MATRIX = 1;
+  const unsigned short SVG_TRANSFORM_TRANSLATE = 2;
+  const unsigned short SVG_TRANSFORM_SCALE = 3;
+  const unsigned short SVG_TRANSFORM_ROTATE = 4;
+  const unsigned short SVG_TRANSFORM_SKEWX = 5;
+  const unsigned short SVG_TRANSFORM_SKEWY = 6;
+
+  readonly attribute unsigned short type;
+  readonly attribute SVGMatrix matrix;
+  readonly attribute float angle;
+
+  [Throws]
+  void setMatrix(SVGMatrix matrix);
+  [Throws]
+  void setTranslate(float tx, float ty);
+  [Throws]
+  void setScale(float sx, float sy);
+  [Throws]
+  void setRotate(float angle, float cx, float cy);
+  [Throws]
+  void setSkewX(float angle);
+  [Throws]
+  void setSkewY(float angle);
+};
+
diff --git a/dom/webidl/SVGTransformList.webidl b/dom/webidl/SVGTransformList.webidl
new file mode 100644
index 000000000..c9763aa26
--- /dev/null
+++ b/dom/webidl/SVGTransformList.webidl
@@ -0,0 +1,35 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG11/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGTransformList {
+  readonly attribute unsigned long numberOfItems;
+  [Throws]
+  void clear();
+  [Throws]
+  SVGTransform initialize(SVGTransform newItem);
+  [Throws]
+  getter SVGTransform getItem(unsigned long index);
+  [Throws]
+  SVGTransform insertItemBefore(SVGTransform newItem, unsigned long index);
+  [Throws]
+  SVGTransform replaceItem(SVGTransform newItem, unsigned long index);
+  [Throws]
+  SVGTransform removeItem(unsigned long index);
+  [Throws]
+  SVGTransform appendItem(SVGTransform newItem);
+  SVGTransform createSVGTransformFromMatrix(SVGMatrix matrix);
+  [Throws]
+  SVGTransform? consolidate();
+
+  // Mozilla-specific stuff
+  readonly attribute unsigned long length; // synonym for numberOfItems
+};
diff --git a/dom/webidl/SVGURIReference.webidl b/dom/webidl/SVGURIReference.webidl
new file mode 100644
index 000000000..11f94c191
--- /dev/null
+++ b/dom/webidl/SVGURIReference.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGURIReference {
+  [Constant]
+  readonly attribute SVGAnimatedString href;
+};
+
diff --git a/dom/webidl/SVGUnitTypeValues.webidl b/dom/webidl/SVGUnitTypeValues.webidl
new file mode 100644
index 000000000..6a1a33e61
--- /dev/null
+++ b/dom/webidl/SVGUnitTypeValues.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGUnitTypeValues {
+  // Unit Types
+  const unsigned short SVG_UNIT_TYPE_UNKNOWN = 0;
+  const unsigned short SVG_UNIT_TYPE_USERSPACEONUSE = 1;
+  const unsigned short SVG_UNIT_TYPE_OBJECTBOUNDINGBOX = 2;
+};
diff --git a/dom/webidl/SVGUnitTypes.webidl b/dom/webidl/SVGUnitTypes.webidl
new file mode 100644
index 000000000..fc12c1188
--- /dev/null
+++ b/dom/webidl/SVGUnitTypes.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://svgwg.org/svg2-draft/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGUnitTypes {
+};
+
+SVGUnitTypes implements SVGUnitTypeValues;
diff --git a/dom/webidl/SVGUseElement.webidl b/dom/webidl/SVGUseElement.webidl
new file mode 100644
index 000000000..8e7a6fd8c
--- /dev/null
+++ b/dom/webidl/SVGUseElement.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGUseElement : SVGGraphicsElement {
+  [Constant]
+  readonly attribute SVGAnimatedLength x;
+  [Constant]
+  readonly attribute SVGAnimatedLength y;
+  [Constant]
+  readonly attribute SVGAnimatedLength width;
+  [Constant]
+  readonly attribute SVGAnimatedLength height;
+  //readonly attribute SVGElementInstance instanceRoot;
+  //readonly attribute SVGElementInstance animatedInstanceRoot;
+};
+
+SVGUseElement implements SVGURIReference;
diff --git a/dom/webidl/SVGViewElement.webidl b/dom/webidl/SVGViewElement.webidl
new file mode 100644
index 000000000..42d988059
--- /dev/null
+++ b/dom/webidl/SVGViewElement.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGViewElement : SVGElement {
+  readonly attribute SVGStringList viewTarget;
+};
+
+SVGViewElement implements SVGFitToViewBox;
+SVGViewElement implements SVGZoomAndPanValues;
+
diff --git a/dom/webidl/SVGZoomAndPan.webidl b/dom/webidl/SVGZoomAndPan.webidl
new file mode 100644
index 000000000..bb5ee780a
--- /dev/null
+++ b/dom/webidl/SVGZoomAndPan.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGZoomAndPan {
+};
+
+SVGZoomAndPan implements SVGZoomAndPanValues;
diff --git a/dom/webidl/SVGZoomAndPanValues.webidl b/dom/webidl/SVGZoomAndPanValues.webidl
new file mode 100644
index 000000000..a09653f0b
--- /dev/null
+++ b/dom/webidl/SVGZoomAndPanValues.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[NoInterfaceObject]
+interface SVGZoomAndPanValues {
+
+  // Zoom and Pan Types
+  const unsigned short SVG_ZOOMANDPAN_UNKNOWN = 0;
+  const unsigned short SVG_ZOOMANDPAN_DISABLE = 1;
+  const unsigned short SVG_ZOOMANDPAN_MAGNIFY = 2;
+
+  [SetterThrows]
+  attribute unsigned short zoomAndPan;
+};
+
diff --git a/dom/webidl/SVGZoomEvent.webidl b/dom/webidl/SVGZoomEvent.webidl
new file mode 100644
index 000000000..044247f3c
--- /dev/null
+++ b/dom/webidl/SVGZoomEvent.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/SVG2/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface SVGZoomEvent : UIEvent {
+  // Not implemented
+  // readonly attribute SVGRect zoomRectScreen;
+
+  [Constant]
+  readonly attribute float previousScale;
+  [Constant]
+  readonly attribute SVGPoint? previousTranslate;
+  [Constant]
+  readonly attribute float newScale;
+  [Constant]
+  readonly attribute SVGPoint? newTranslate;
+};
diff --git a/dom/webidl/Screen.webidl b/dom/webidl/Screen.webidl
new file mode 100644
index 000000000..6b5824fa8
--- /dev/null
+++ b/dom/webidl/Screen.webidl
@@ -0,0 +1,61 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface Screen : EventTarget {
+  // CSSOM-View
+  // http://dev.w3.org/csswg/cssom-view/#the-screen-interface
+  [Throws]
+  readonly attribute long availWidth;
+  [Throws]
+  readonly attribute long availHeight;
+  [Throws]
+  readonly attribute long width;
+  [Throws]
+  readonly attribute long height;
+  [Throws]
+  readonly attribute long colorDepth;
+  [Throws]
+  readonly attribute long pixelDepth;
+
+  [Throws]
+  readonly attribute long top;
+  [Throws]
+  readonly attribute long left;
+  [Throws]
+  readonly attribute long availTop;
+  [Throws]
+  readonly attribute long availLeft;
+
+  /**
+   * DEPRECATED, use ScreenOrientation API instead.
+   * Returns the current screen orientation.
+   * Can be: landscape-primary, landscape-secondary,
+   *         portrait-primary or portrait-secondary.
+   */
+  readonly attribute DOMString mozOrientation;
+
+  attribute EventHandler onmozorientationchange;
+
+  /**
+   * DEPRECATED, use ScreenOrientation API instead.
+   * Lock screen orientation to the specified type.
+   */
+  [Throws, UnsafeInPrerendering]
+  boolean mozLockOrientation(DOMString orientation);
+  [Throws, UnsafeInPrerendering]
+  boolean mozLockOrientation(sequence<DOMString> orientation);
+
+  /**
+   * DEPRECATED, use ScreenOrientation API instead.
+   * Unlock the screen orientation.
+   */
+  [UnsafeInPrerendering]
+  void mozUnlockOrientation();
+};
+
+// https://w3c.github.io/screen-orientation
+partial interface Screen {
+  readonly attribute ScreenOrientation orientation;
+};
diff --git a/dom/webidl/ScreenOrientation.webidl b/dom/webidl/ScreenOrientation.webidl
new file mode 100644
index 000000000..48a2c1170
--- /dev/null
+++ b/dom/webidl/ScreenOrientation.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/screen-orientation
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights
+ * Reserved. W3C liability, trademark and document use rules apply.
+ */
+
+enum OrientationType {
+  "portrait-primary",
+  "portrait-secondary",
+  "landscape-primary",
+  "landscape-secondary"
+};
+
+enum OrientationLockType {
+  "any",
+  "natural",
+  "landscape",
+  "portrait",
+  "portrait-primary",
+  "portrait-secondary",
+  "landscape-primary",
+  "landscape-secondary"
+};
+
+[UnsafeInPrerendering]
+interface ScreenOrientation : EventTarget {
+  [Throws]
+  Promise<void> lock(OrientationLockType orientation);
+  [Throws]
+  void unlock();
+  [Throws]
+  readonly attribute OrientationType type;
+  [Throws]
+  readonly attribute unsigned short angle;
+  attribute EventHandler onchange;
+};
diff --git a/dom/webidl/ScriptProcessorNode.webidl b/dom/webidl/ScriptProcessorNode.webidl
new file mode 100644
index 000000000..81c02443f
--- /dev/null
+++ b/dom/webidl/ScriptProcessorNode.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface ScriptProcessorNode : AudioNode {
+
+    attribute EventHandler onaudioprocess;
+
+    readonly attribute long bufferSize;
+
+};
+
+// Mozilla extension
+ScriptProcessorNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/ScrollAreaEvent.webidl b/dom/webidl/ScrollAreaEvent.webidl
new file mode 100644
index 000000000..f24b7c0ad
--- /dev/null
+++ b/dom/webidl/ScrollAreaEvent.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface ScrollAreaEvent : UIEvent
+{
+  readonly attribute float x;
+  readonly attribute float y;
+  readonly attribute float width;
+  readonly attribute float height;
+
+  void initScrollAreaEvent(DOMString type,
+                           optional boolean canBubble = false,
+                           optional boolean cancelable = false,
+                           optional Window? view = null,
+                           optional long detail = 0,
+                           optional float x = 0,
+                           optional float y = 0,
+                           optional float width = 0,
+                           optional float height = 0);
+};
diff --git a/dom/webidl/ScrollBoxObject.webidl b/dom/webidl/ScrollBoxObject.webidl
new file mode 100644
index 000000000..af6905852
--- /dev/null
+++ b/dom/webidl/ScrollBoxObject.webidl
@@ -0,0 +1,70 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[NoInterfaceObject]
+interface ScrollBoxObject : BoxObject {
+
+  /**
+   * Scroll to the given coordinates, in css pixels.
+   * (0,0) will put the top left corner of the scrolled element's padding-box
+   * at the top left corner of the scrollport (which is its inner-border-box).
+   * Values will be clamped to legal values.
+   */
+  [Throws]
+  void scrollTo(long x, long y);
+
+  /**
+   * Scroll the given amount of device pixels to the right and down.
+   * Values will be clamped to make the resuling position legal.
+   */
+  [Throws]
+  void scrollBy(long dx, long dy);
+  [Throws]
+  void scrollByLine(long dlines);
+  [Throws]
+  void scrollByIndex(long dindexes);
+  [Throws]
+  void scrollToLine(long line);
+  [Throws]
+  void scrollToElement(Element child);
+  [Throws]
+  void scrollToIndex(long index);
+
+  /**
+   * Get the current scroll position in css pixels.
+   * @see scrollTo for the definition of x and y.
+   */
+  [Pure, Throws]
+  readonly attribute long positionX;
+  [Pure, Throws]
+  readonly attribute long positionY;
+  [Pure, Throws]
+  readonly attribute long scrolledWidth;
+  [Pure, Throws]
+  readonly attribute long scrolledHeight;
+
+  /**
+   * DEPRECATED: Please use positionX and positionY
+   *
+   * Get the current scroll position in css pixels.
+   * @see scrollTo for the definition of x and y.
+   */
+  [Throws]
+  void getPosition(object x, object y);
+
+  /**
+   * DEPRECATED: Please use scrolledWidth and scrolledHeight
+   */
+  [Throws]
+  void getScrolledSize(object width, object height);
+
+  [Throws]
+  void ensureElementIsVisible(Element child);
+  [Throws]
+  void ensureIndexIsVisible(long index);
+  [Throws]
+  void ensureLineIsVisible(long line);
+};
diff --git a/dom/webidl/ScrollViewChangeEvent.webidl b/dom/webidl/ScrollViewChangeEvent.webidl
new file mode 100644
index 000000000..a3e92139a
--- /dev/null
+++ b/dom/webidl/ScrollViewChangeEvent.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+enum ScrollState {"started", "stopped"};
+
+dictionary ScrollViewChangeEventInit : EventInit {
+  ScrollState state = "started";
+};
+
+[Constructor(DOMString type, optional ScrollViewChangeEventInit eventInit),
+ ChromeOnly]
+interface ScrollViewChangeEvent : Event {
+  readonly attribute ScrollState state;
+};
diff --git a/dom/webidl/SecureElement.webidl b/dom/webidl/SecureElement.webidl
new file mode 100644
index 000000000..1f247aac0
--- /dev/null
+++ b/dom/webidl/SecureElement.webidl
@@ -0,0 +1,158 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+ /* Copyright © 2014 Deutsche Telekom, Inc. */
+
+enum SEType {
+  "uicc",
+  "eSE"
+};
+
+enum SEError {
+  "SESecurityError",            // Requested operation does not match the access control rules of the application.
+  "SEIoError",                  // I/O Error while communicating with the secure element.
+  "SEBadStateError",            // Error occuring as a result of bad state.
+  "SEInvalidChannelError",      // Opening a channel failed because no channel is available.
+  "SEInvalidApplicationError",  // The requested application was not found on the secure element.
+  "SENotPresentError",          // Secure Element is not present
+  "SEIllegalParameterError",    // Request operation does not have valid parameters.
+  "SEGenericError"              // Generic failures.
+};
+
+enum SEChannelType {
+  "basic",
+  "logical"
+};
+
+// Dictionary that represents an APDU command to be sent to a secure element.
+dictionary SECommand {
+  required octet cla;            // Class Byte
+  required octet ins;            // Instruction Byte
+  required octet p1;             // First Octet of Parameters Byte
+  required octet p2;             // Second Octet of Parameters Byte
+  sequence<octet>? data = null;  // Sequence of octets
+  short le = -1;                 // The length of the expected
+                                 // response data or -1 if none is expected
+};
+
+[Pref="dom.secureelement.enabled",
+ ChromeOnly,
+ JSImplementation="@mozilla.org/secureelement/reader;1"]
+interface SEReader {
+
+  // 'true' if a secure element is present
+  readonly attribute boolean isSEPresent;
+
+  // Type of SecureElement
+  readonly attribute SEType type;
+
+  /**
+   * Opens a session with the Secure Element.
+   * Note that a reader may have several opened sessions.
+   *
+   * @return If the operation is successful the promise is resolved with an instance of SESession.
+   */
+  [Throws]
+  Promise<SESession> openSession();
+
+  /**
+   * Closes all sessions associated with this Reader and its associated channels.
+   *
+   */
+  [Throws]
+  Promise<void> closeAll();
+};
+
+[Pref="dom.secureelement.enabled",
+ ChromeOnly,
+ JSImplementation="@mozilla.org/secureelement/session;1"]
+interface SESession {
+
+  // 'reader' that provides this session
+  readonly attribute SEReader reader;
+
+  // Status of current session
+  readonly attribute boolean isClosed;
+
+  /**
+   * Opens a communication logical channel to an application on Secure Element identified by the AID.
+   * The 'aid' can be null for some secure elements.
+   *
+   * @param aid
+   *     Application Identifier of the Card Applet on the secure element.
+   *     If the 'aid' is null :
+   *       For secure element type 'eSE', the default applet is selected.
+   *       For secure element type 'uicc', the request will be immediately rejected.
+   *     Note that the length of 'aid should be between 5 and 16.
+   *
+   * @return If the operation is successful the promise is resolved with an instance of SEChannel.
+   */
+  [Throws]
+  Promise<SEChannel> openLogicalChannel(Uint8Array? aid);
+
+  /**
+   * Close all active channels associated with this session.
+   *
+   */
+  [Throws]
+  Promise<void> closeAll();
+};
+
+[Pref="dom.secureelement.enabled",
+ ChromeOnly,
+ JSImplementation="@mozilla.org/secureelement/channel;1"]
+interface SEChannel {
+
+  // 'session' obj this channel is bound to
+  readonly attribute SESession session;
+
+  // response to openBasicChannel / openLogicalChannel operation
+  [Constant, Cached] readonly  attribute Uint8Array? openResponse;
+
+  // Status of channel
+  readonly attribute boolean isClosed;
+
+  // Type of channel
+  readonly attribute SEChannelType type;
+
+  /**
+   * Transmits the APDU command to the secure element. This is an atomic operation that transmits
+   * an APDU command (as per ISO7816-4) to the secure element (UICC / eSE). Upon receiving response
+   * to the transmit apdu command, it is propogated to the applications using SEResponse object.
+   *
+   * @param command
+   *     SECommand to be sent to secure element
+   *
+   * @return If success, the promise is resolved with the new created
+   * SEResponse object. Otherwise, rejected with the error of type 'SEError'.
+   */
+  [Throws]
+  Promise<SEResponse> transmit(optional SECommand command);
+
+  /**
+   * Closes the active channel.
+   *
+   */
+  [Throws]
+  Promise<void> close();
+};
+
+[Pref="dom.secureelement.enabled",
+ ChromeOnly,
+ JSImplementation="@mozilla.org/secureelement/response;1"]
+interface SEResponse {
+  // Response received on this 'channel' object.
+  [Constant] readonly attribute SEChannel channel;
+
+  // First octet of response's status word
+  [Constant] readonly attribute octet        sw1;
+
+  // Second octet of response's status word
+  [Constant] readonly attribute octet        sw2;
+
+  // The response's data field bytes
+  [Cached, Pure] readonly attribute sequence<octet>?  data;
+
+};
+
diff --git a/dom/webidl/SecureElementManager.webidl b/dom/webidl/SecureElementManager.webidl
new file mode 100644
index 000000000..4a43ad5fe
--- /dev/null
+++ b/dom/webidl/SecureElementManager.webidl
@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+ /* Copyright © 2014 Deutsche Telekom, Inc. */
+
+[Pref="dom.secureelement.enabled",
+ ChromeOnly,
+ JSImplementation="@mozilla.org/secureelement/manager;1",
+ NavigatorProperty="seManager",
+ NoInterfaceObject]
+interface SEManager {
+
+  /**
+   * Retrieves all the readers available on the device.
+   *
+   * @return If success, the promise is resolved to  a sequence
+   *        of SEReaders Otherwise, rejected with an error.
+   */
+  [Throws]
+  Promise<sequence<SEReader>> getSEReaders();
+};
diff --git a/dom/webidl/Selection.webidl b/dom/webidl/Selection.webidl
new file mode 100644
index 000000000..2b85b87f9
--- /dev/null
+++ b/dom/webidl/Selection.webidl
@@ -0,0 +1,95 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#concept-selection
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface Selection {
+  readonly attribute Node? anchorNode;
+  readonly attribute unsigned long anchorOffset;
+  readonly attribute Node? focusNode;
+  readonly attribute unsigned long focusOffset;
+
+  readonly attribute boolean isCollapsed;
+  [Throws]
+  void               collapse(Node node, unsigned long offset);
+  [Throws]
+  void               collapseToStart();
+  [Throws]
+  void               collapseToEnd();
+
+  [Throws]
+  void               extend(Node node, unsigned long offset);
+
+  [Throws]
+  void               selectAllChildren(Node node);
+  [Throws]
+  void               deleteFromDocument();
+
+  readonly attribute unsigned long rangeCount;
+  readonly attribute DOMString     type;
+  [Throws]
+  Range              getRangeAt(unsigned long index);
+  [Throws]
+  void               addRange(Range range);
+  [Throws]
+  void               removeRange(Range range);
+  [Throws]
+  void               removeAllRanges();
+
+  [Throws]
+  boolean            containsNode(Node node, boolean allowPartialContainment);
+
+  [Throws]
+  void               setBaseAndExtent(Node anchorNode,
+                                      unsigned long anchorOffset,
+                                      Node focusNode,
+                                      unsigned long focusOffset);
+
+  stringifier;
+};
+
+// Additional methods not currently in the spec
+partial interface Selection {
+  [Throws]
+  void modify(DOMString alter, DOMString direction,
+              DOMString granularity);
+};
+
+// Additional chrome-only methods from nsISelectionPrivate
+interface nsISelectionListener;
+partial interface Selection {
+  [ChromeOnly]
+  const short ENDOFPRECEDINGLINE = 0;
+  [ChromeOnly]
+  const short STARTOFNEXTLINE = 1;
+
+  [ChromeOnly,Throws]
+  attribute boolean interlinePosition;
+
+  [Throws]
+  attribute short? caretBidiLevel;
+
+  [ChromeOnly,Throws]
+  DOMString  toStringWithFormat(DOMString formatType, unsigned long flags, long wrapColumn);
+  [ChromeOnly,Throws]
+  void  addSelectionListener(nsISelectionListener newListener);
+  [ChromeOnly,Throws]
+  void  removeSelectionListener(nsISelectionListener listenerToRemove);
+
+  [ChromeOnly,BinaryName="rawType"]
+  readonly attribute short selectionType;
+
+  [ChromeOnly,Throws,Pref="dom.testing.selection.GetRangesForInterval"]
+  sequence<Range> GetRangesForInterval(Node beginNode, long beginOffset, Node endNode, long endOffset,
+                                       boolean allowAdjacent);
+
+  [ChromeOnly,Throws]
+  void scrollIntoView(short aRegion, boolean aIsSynchronous, short aVPercent, short aHPercent);
+};
diff --git a/dom/webidl/ServiceWorker.webidl b/dom/webidl/ServiceWorker.webidl
new file mode 100644
index 000000000..8c3749e94
--- /dev/null
+++ b/dom/webidl/ServiceWorker.webidl
@@ -0,0 +1,35 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html#service-worker-obj
+ *
+ */
+
+// Still unclear what should be subclassed.
+// https://github.com/slightlyoff/ServiceWorker/issues/189
+[Func="mozilla::dom::workers::ServiceWorkerVisible",
+ // FIXME(nsm): Bug 1113522. This is exposed to satisfy webidl constraints, but it won't actually work.
+ Exposed=(Window,Worker)]
+interface ServiceWorker : EventTarget {
+  readonly attribute USVString scriptURL;
+  readonly attribute ServiceWorkerState state;
+
+  attribute EventHandler onstatechange;
+
+  // FIXME(catalinb): Should inherit this from Worker.
+  [Throws]
+  void postMessage(any message, optional sequence<Transferable> transferable);
+};
+
+ServiceWorker implements AbstractWorker;
+
+enum ServiceWorkerState {
+  "installing",
+  "installed",
+  "activating",
+  "activated",
+  "redundant"
+};
diff --git a/dom/webidl/ServiceWorkerContainer.webidl b/dom/webidl/ServiceWorkerContainer.webidl
new file mode 100644
index 000000000..91232f9f3
--- /dev/null
+++ b/dom/webidl/ServiceWorkerContainer.webidl
@@ -0,0 +1,45 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+[Func="ServiceWorkerContainer::IsEnabled",
+ Exposed=Window]
+interface ServiceWorkerContainer : EventTarget {
+  // FIXME(nsm):
+  // https://github.com/slightlyoff/ServiceWorker/issues/198
+  // and discussion at https://etherpad.mozilla.org/serviceworker07apr
+  [Unforgeable] readonly attribute ServiceWorker? controller;
+
+  [SameObject, Throws]
+  readonly attribute Promise<ServiceWorkerRegistration> ready;
+
+  [NewObject]
+  Promise<ServiceWorkerRegistration> register(USVString scriptURL,
+                                              optional RegistrationOptions options);
+
+  [NewObject]
+  Promise<any> getRegistration(optional USVString documentURL = "");
+
+  [NewObject]
+  Promise<sequence<ServiceWorkerRegistration>> getRegistrations();
+
+  attribute EventHandler oncontrollerchange;
+  attribute EventHandler onerror;
+  attribute EventHandler onmessage;
+};
+
+// Testing only.
+partial interface ServiceWorkerContainer {
+  [Throws,Pref="dom.serviceWorkers.testing.enabled"]
+  DOMString getScopeForUrl(DOMString url);
+};
+
+dictionary RegistrationOptions {
+  USVString scope;
+};
diff --git a/dom/webidl/ServiceWorkerGlobalScope.webidl b/dom/webidl/ServiceWorkerGlobalScope.webidl
new file mode 100644
index 000000000..b59bf0aa0
--- /dev/null
+++ b/dom/webidl/ServiceWorkerGlobalScope.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Global=(Worker,ServiceWorker),
+ Exposed=ServiceWorker]
+interface ServiceWorkerGlobalScope : WorkerGlobalScope {
+  [SameObject] readonly attribute Clients clients;
+  [SameObject] readonly attribute ServiceWorkerRegistration registration;
+
+  [Throws, NewObject]
+  Promise<void> skipWaiting();
+
+  attribute EventHandler oninstall;
+  attribute EventHandler onactivate;
+
+  attribute EventHandler onfetch;
+
+  // The event.source of these MessageEvents are instances of Client
+  attribute EventHandler onmessage;
+};
+
+// These are from w3c.github.io/push-api/
+partial interface ServiceWorkerGlobalScope {
+  attribute EventHandler onpush;
+  attribute EventHandler onpushsubscriptionchange;
+};
+
diff --git a/dom/webidl/ServiceWorkerMessageEvent.webidl b/dom/webidl/ServiceWorkerMessageEvent.webidl
new file mode 100644
index 000000000..c05696c15
--- /dev/null
+++ b/dom/webidl/ServiceWorkerMessageEvent.webidl
@@ -0,0 +1,48 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+[Pref="dom.serviceWorkers.enabled",
+ Constructor(DOMString type, optional ServiceWorkerMessageEventInit eventInitDict),
+ Exposed=Window]
+interface ServiceWorkerMessageEvent : Event {
+  /**
+   * Custom data associated with this event.
+   */
+  readonly attribute any data;
+
+  /**
+   * The origin of the site from which this event originated.
+   */
+  readonly attribute DOMString origin;
+
+  /**
+   * The last event ID string of the event source.
+   */
+  readonly attribute DOMString lastEventId;
+
+  /**
+   * The service worker or port which originated this event.
+   * FIXME: Use SameOject after IDL spec is updated
+   * https://bugzilla.mozilla.org/show_bug.cgi?id=1196097
+   */
+  [Constant] readonly attribute (ServiceWorker or MessagePort)? source;
+
+  [Constant, Cached, Frozen]
+  readonly attribute sequence<MessagePort> ports;
+};
+
+dictionary ServiceWorkerMessageEventInit : EventInit
+{
+  any data = null;
+  DOMString origin = "";
+  DOMString lastEventId = "";
+  (ServiceWorker or MessagePort)? source = null;
+  sequence<MessagePort> ports = [];
+};
diff --git a/dom/webidl/ServiceWorkerRegistration.webidl b/dom/webidl/ServiceWorkerRegistration.webidl
new file mode 100644
index 000000000..04d0af3f4
--- /dev/null
+++ b/dom/webidl/ServiceWorkerRegistration.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html
+ *
+ */
+
+[Func="mozilla::dom::ServiceWorkerRegistration::Visible",
+ Exposed=(Window,Worker)]
+interface ServiceWorkerRegistration : EventTarget {
+  [Unforgeable] readonly attribute ServiceWorker? installing;
+  [Unforgeable] readonly attribute ServiceWorker? waiting;
+  [Unforgeable] readonly attribute ServiceWorker? active;
+
+  readonly attribute USVString scope;
+
+  [Throws, NewObject]
+  Promise<void> update();
+
+  [Throws, NewObject]
+  Promise<boolean> unregister();
+
+  // event
+  attribute EventHandler onupdatefound;
+};
+
+partial interface ServiceWorkerRegistration {
+  [Throws, Exposed=(Window,Worker), Func="nsContentUtils::PushEnabled"]
+  readonly attribute PushManager pushManager;
+};
diff --git a/dom/webidl/SettingChangeNotification.webidl b/dom/webidl/SettingChangeNotification.webidl
new file mode 100644
index 000000000..11c097e3d
--- /dev/null
+++ b/dom/webidl/SettingChangeNotification.webidl
@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Used internally by Gecko
+dictionary SettingChangeNotification {
+  DOMString key   = "";
+  any       value;
+  boolean   isInternalChange = false;
+};
diff --git a/dom/webidl/SettingsManager.webidl b/dom/webidl/SettingsManager.webidl
new file mode 100644
index 000000000..ad707a258
--- /dev/null
+++ b/dom/webidl/SettingsManager.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[JSImplementation="@mozilla.org/settingsLock;1",
+ Pref="dom.mozSettings.enabled"]
+interface SettingsLock : EventTarget {
+  // Whether this lock is invalid
+  readonly attribute boolean closed;
+
+  // Contains a JSON object with name/value pairs to be set.
+  DOMRequest set(object settings);
+
+  // Result contains the value of the setting.
+  DOMRequest get(DOMString name);
+
+  DOMRequest clear();
+  attribute EventHandler onsettingstransactionsuccess;
+  attribute EventHandler onsettingstransactionfailure;
+};
+
+dictionary SettingChange {
+  DOMString settingName;
+  DOMString settingValue;
+};
+
+callback SettingChangeCallback = void (SettingChange setting);
+
+[JSImplementation="@mozilla.org/settingsManager;1",
+ NavigatorProperty="mozSettings",
+ Pref="dom.mozSettings.enabled",
+ ChromeOnly]
+interface SettingsManager : EventTarget {
+  SettingsLock createLock();
+
+  void addObserver(DOMString name, SettingChangeCallback callback);
+  void removeObserver(DOMString name, SettingChangeCallback callback);
+
+  attribute EventHandler onsettingchange;
+};
diff --git a/dom/webidl/ShadowRoot.webidl b/dom/webidl/ShadowRoot.webidl
new file mode 100644
index 000000000..83acd4161
--- /dev/null
+++ b/dom/webidl/ShadowRoot.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// https://dom.spec.whatwg.org/#enumdef-shadowrootmode
+enum ShadowRootMode {
+  "open",
+  "closed"
+};
+
+// https://dom.spec.whatwg.org/#shadowroot
+[Func="nsDocument::IsWebComponentsEnabled"]
+interface ShadowRoot : DocumentFragment
+{
+  // Shadow DOM v1
+  readonly attribute ShadowRootMode mode;
+  readonly attribute Element host;
+
+  // [deprecated] Shadow DOM v0
+  Element? getElementById(DOMString elementId);
+  HTMLCollection getElementsByTagName(DOMString localName);
+  HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
+  HTMLCollection getElementsByClassName(DOMString classNames);
+  [CEReactions, SetterThrows, TreatNullAs=EmptyString]
+  attribute DOMString innerHTML;
+  attribute boolean applyAuthorStyles;
+};
+
diff --git a/dom/webidl/SharedWorker.webidl b/dom/webidl/SharedWorker.webidl
new file mode 100644
index 000000000..042fa4af9
--- /dev/null
+++ b/dom/webidl/SharedWorker.webidl
@@ -0,0 +1,12 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString scriptURL, optional DOMString name)]
+interface SharedWorker : EventTarget {
+    readonly attribute MessagePort port;
+};
+
+SharedWorker implements AbstractWorker;
diff --git a/dom/webidl/SharedWorkerGlobalScope.webidl b/dom/webidl/SharedWorkerGlobalScope.webidl
new file mode 100644
index 000000000..f3e8daf42
--- /dev/null
+++ b/dom/webidl/SharedWorkerGlobalScope.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#the-workerglobalscope-common-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Global=(Worker,SharedWorker),
+ Exposed=SharedWorker]
+interface SharedWorkerGlobalScope : WorkerGlobalScope {
+  readonly attribute DOMString name;
+  attribute EventHandler onconnect;
+};
diff --git a/dom/webidl/SimpleGestureEvent.webidl b/dom/webidl/SimpleGestureEvent.webidl
new file mode 100644
index 000000000..76d0d20f6
--- /dev/null
+++ b/dom/webidl/SimpleGestureEvent.webidl
@@ -0,0 +1,46 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information see nsIDOMSimpleGestureEvent.idl.
+ */
+
+interface SimpleGestureEvent : MouseEvent
+{
+  const unsigned long DIRECTION_UP = 1;
+  const unsigned long DIRECTION_DOWN = 2;
+  const unsigned long DIRECTION_LEFT = 4;
+  const unsigned long DIRECTION_RIGHT = 8;
+
+  const unsigned long ROTATION_COUNTERCLOCKWISE = 1;
+  const unsigned long ROTATION_CLOCKWISE = 2;
+
+  attribute unsigned long allowedDirections;
+
+  readonly attribute unsigned long direction;
+
+  readonly attribute double delta;
+
+  readonly attribute unsigned long clickCount;
+
+  void initSimpleGestureEvent(DOMString typeArg,
+                              optional boolean canBubbleArg = false,
+                              optional boolean cancelableArg = false,
+                              optional Window? viewArg = null,
+                              optional long detailArg = 0,
+                              optional long screenXArg = 0,
+                              optional long screenYArg = 0,
+                              optional long clientXArg = 0,
+                              optional long clientYArg = 0,
+                              optional boolean ctrlKeyArg = false,
+                              optional boolean altKeyArg = false,
+                              optional boolean shiftKeyArg = false,
+                              optional boolean metaKeyArg = false,
+                              optional short buttonArg = 0,
+                              optional EventTarget? relatedTargetArg = null,
+                              optional unsigned long allowedDirectionsArg = 0,
+                              optional unsigned long directionArg = 0,
+                              optional double deltaArg = 0,
+                              optional unsigned long clickCount = 0);
+};
diff --git a/dom/webidl/SocketCommon.webidl b/dom/webidl/SocketCommon.webidl
new file mode 100644
index 000000000..044199ea2
--- /dev/null
+++ b/dom/webidl/SocketCommon.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/2012/sysapps/tcp-udp-sockets/#readystate
+ */
+
+enum SocketReadyState {
+    "opening",
+    "open",
+    "closing",
+    "closed",
+    "halfclosed"
+};
diff --git a/dom/webidl/SourceBuffer.webidl b/dom/webidl/SourceBuffer.webidl
new file mode 100644
index 000000000..a1d9f98cf
--- /dev/null
+++ b/dom/webidl/SourceBuffer.webidl
@@ -0,0 +1,49 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum SourceBufferAppendMode {
+    "segments",
+    "sequence"
+};
+
+[Func="mozilla::dom::MediaSource::Enabled"]
+interface SourceBuffer : EventTarget {
+  [SetterThrows]
+  attribute SourceBufferAppendMode mode;
+  readonly attribute boolean updating;
+  [Throws]
+  readonly attribute TimeRanges buffered;
+  [SetterThrows]
+  attribute double timestampOffset;
+  //readonly attribute AudioTrackList audioTracks;
+  //readonly attribute VideoTrackList videoTracks;
+  //readonly attribute TextTrackList textTracks;
+  [SetterThrows]
+  attribute double appendWindowStart;
+  [SetterThrows]
+  attribute unrestricted double appendWindowEnd;
+  attribute EventHandler onupdatestart;
+  attribute EventHandler onupdate;
+  attribute EventHandler onupdateend;
+  attribute EventHandler onerror;
+  attribute EventHandler onabort;
+  [Throws]
+  void appendBuffer(ArrayBuffer data);
+  [Throws]
+  void appendBuffer(ArrayBufferView data);
+  //[Throws]
+  //void appendStream(Stream stream, [EnforceRange] optional unsigned long long maxSize);
+  [Throws]
+  void abort();
+  [Throws]
+  void remove(double start, unrestricted double end);
+};
diff --git a/dom/webidl/SourceBufferList.webidl b/dom/webidl/SourceBufferList.webidl
new file mode 100644
index 000000000..15c302622
--- /dev/null
+++ b/dom/webidl/SourceBufferList.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="mozilla::dom::MediaSource::Enabled"]
+interface SourceBufferList : EventTarget {
+  readonly attribute unsigned long length;
+  attribute EventHandler onaddsourcebuffer;
+  attribute EventHandler onremovesourcebuffer;
+  getter SourceBuffer (unsigned long index);
+};
diff --git a/dom/webidl/SpeechSynthesis.webidl b/dom/webidl/SpeechSynthesis.webidl
new file mode 100644
index 000000000..9cc3a061e
--- /dev/null
+++ b/dom/webidl/SpeechSynthesis.webidl
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="media.webspeech.synth.enabled"]
+interface SpeechSynthesis : EventTarget{
+  readonly attribute boolean pending;
+  readonly attribute boolean speaking;
+  readonly attribute boolean paused;
+
+  [UnsafeInPrerendering]
+  void speak(SpeechSynthesisUtterance utterance);
+  void cancel();
+  void pause();
+  [UnsafeInPrerendering]
+  void resume();
+  sequence<SpeechSynthesisVoice> getVoices();
+
+  attribute EventHandler onvoiceschanged;
+
+  [ChromeOnly]
+  // Force an utterance to end. Circumvents bad speech service implementations.
+  void forceEnd();
+};
diff --git a/dom/webidl/SpeechSynthesisErrorEvent.webidl b/dom/webidl/SpeechSynthesisErrorEvent.webidl
new file mode 100644
index 000000000..1388755d3
--- /dev/null
+++ b/dom/webidl/SpeechSynthesisErrorEvent.webidl
@@ -0,0 +1,36 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum SpeechSynthesisErrorCode {
+  "canceled",
+  "interrupted",
+  "audio-busy",
+  "audio-hardware",
+  "network",
+  "synthesis-unavailable",
+  "synthesis-failed",
+  "language-unavailable",
+  "voice-unavailable",
+  "text-too-long",
+  "invalid-argument",
+};
+
+[Constructor(DOMString type, SpeechSynthesisErrorEventInit eventInitDict),
+ Pref="media.webspeech.synth.enabled"]
+interface SpeechSynthesisErrorEvent : SpeechSynthesisEvent {
+  readonly attribute SpeechSynthesisErrorCode error;
+};
+
+dictionary SpeechSynthesisErrorEventInit : SpeechSynthesisEventInit
+{
+  required SpeechSynthesisErrorCode error;
+};
diff --git a/dom/webidl/SpeechSynthesisEvent.webidl b/dom/webidl/SpeechSynthesisEvent.webidl
new file mode 100644
index 000000000..a5f8b3c2b
--- /dev/null
+++ b/dom/webidl/SpeechSynthesisEvent.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, SpeechSynthesisEventInit eventInitDict),
+ Pref="media.webspeech.synth.enabled"]
+interface SpeechSynthesisEvent : Event
+{
+  readonly attribute SpeechSynthesisUtterance utterance;
+  readonly attribute unsigned long charIndex;
+  readonly attribute float elapsedTime;
+  readonly attribute DOMString? name;
+};
+
+dictionary SpeechSynthesisEventInit : EventInit
+{
+  required SpeechSynthesisUtterance utterance;
+  unsigned long charIndex = 0;
+  float elapsedTime = 0;
+  DOMString name = "";
+};
diff --git a/dom/webidl/SpeechSynthesisUtterance.webidl b/dom/webidl/SpeechSynthesisUtterance.webidl
new file mode 100644
index 000000000..14f6e9fde
--- /dev/null
+++ b/dom/webidl/SpeechSynthesisUtterance.webidl
@@ -0,0 +1,34 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="media.webspeech.synth.enabled",
+ Constructor,
+ Constructor(DOMString text)]
+interface SpeechSynthesisUtterance : EventTarget {
+  attribute DOMString text;
+  attribute DOMString lang;
+  attribute SpeechSynthesisVoice? voice;
+  attribute float volume;
+  attribute float rate;
+  attribute float pitch;
+
+  attribute EventHandler onstart;
+  attribute EventHandler onend;
+  attribute EventHandler onerror;
+  attribute EventHandler onpause;
+  attribute EventHandler onresume;
+  attribute EventHandler onmark;
+  attribute EventHandler onboundary;
+
+  [ChromeOnly]
+  readonly attribute DOMString chosenVoiceURI;
+};
diff --git a/dom/webidl/SpeechSynthesisVoice.webidl b/dom/webidl/SpeechSynthesisVoice.webidl
new file mode 100644
index 000000000..39ea6964d
--- /dev/null
+++ b/dom/webidl/SpeechSynthesisVoice.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="media.webspeech.synth.enabled"]
+interface SpeechSynthesisVoice {
+  readonly attribute DOMString voiceURI;
+  readonly attribute DOMString name;
+  readonly attribute DOMString lang;
+  readonly attribute boolean localService;
+  readonly attribute boolean default;
+};
diff --git a/dom/webidl/StereoPannerNode.webidl b/dom/webidl/StereoPannerNode.webidl
new file mode 100644
index 000000000..f84c8310b
--- /dev/null
+++ b/dom/webidl/StereoPannerNode.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Pref="dom.webaudio.enabled"]
+interface StereoPannerNode : AudioNode {
+  readonly attribute AudioParam pan;
+};
+
+// Mozilla extension
+StereoPannerNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/Storage.webidl b/dom/webidl/Storage.webidl
new file mode 100644
index 000000000..d951cdafe
--- /dev/null
+++ b/dom/webidl/Storage.webidl
@@ -0,0 +1,35 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/.
+*
+* The origin of this IDL file is
+* http://www.whatwg.org/html/#the-storage-interface
+*
+* © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+* Opera Software ASA. You are granted a license to use, reproduce
+* and create derivative works of this document.
+*/
+
+interface Storage {
+  [Throws, NeedsSubjectPrincipal]
+  readonly attribute unsigned long length;
+
+  [Throws, NeedsSubjectPrincipal]
+  DOMString? key(unsigned long index);
+
+  [Throws, NeedsSubjectPrincipal]
+  getter DOMString? getItem(DOMString key);
+
+  [Throws, NeedsSubjectPrincipal]
+  setter creator void setItem(DOMString key, DOMString value);
+
+  [Throws, NeedsSubjectPrincipal]
+  deleter void removeItem(DOMString key);
+
+  [Throws, NeedsSubjectPrincipal]
+  void clear();
+
+  [ChromeOnly]
+  readonly attribute boolean isSessionOnly;
+};
diff --git a/dom/webidl/StorageEvent.webidl b/dom/webidl/StorageEvent.webidl
new file mode 100644
index 000000000..e03f8232c
--- /dev/null
+++ b/dom/webidl/StorageEvent.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Interface for a client side storage. See
+ * http://dev.w3.org/html5/webstorage/#the-storage-event
+ * for more information.
+ *
+ * Event sent to a window when a storage area changes.
+ */
+
+[Constructor(DOMString type, optional StorageEventInit eventInitDict)]
+interface StorageEvent : Event
+{
+  readonly attribute DOMString? key;
+  readonly attribute DOMString? oldValue;
+  readonly attribute DOMString? newValue;
+  readonly attribute DOMString? url;
+  readonly attribute Storage? storageArea;
+
+  // Bug 1016053 - This is not spec compliant.
+  void initStorageEvent(DOMString type,
+                        optional boolean canBubble = false,
+                        optional boolean cancelable = false,
+                        optional DOMString? key = null,
+                        optional DOMString? oldValue = null,
+                        optional DOMString? newValue = null,
+                        optional DOMString? url = null,
+                        optional Storage? storageArea = null);
+};
+
+dictionary StorageEventInit : EventInit
+{
+  DOMString? key = null;
+  DOMString? oldValue = null;
+  DOMString? newValue = null;
+  DOMString url = "";
+  Storage? storageArea = null;
+};
diff --git a/dom/webidl/StorageManager.webidl b/dom/webidl/StorageManager.webidl
new file mode 100644
index 000000000..b2855206e
--- /dev/null
+++ b/dom/webidl/StorageManager.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://storage.spec.whatwg.org/#storagemanager
+ *
+ */
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::StorageManager::PrefEnabled"]
+interface StorageManager {
+  // [Throws]
+  // Promise<boolean> persisted();
+  // [Throws]
+  // [Exposed=Window] Promise<boolean> persist();
+  [Throws]
+  Promise<StorageEstimate> estimate();
+};
+
+dictionary StorageEstimate {
+  unsigned long long usage;
+  unsigned long long quota;
+};
diff --git a/dom/webidl/StorageType.webidl b/dom/webidl/StorageType.webidl
new file mode 100644
index 000000000..cb0702d2a
--- /dev/null
+++ b/dom/webidl/StorageType.webidl
@@ -0,0 +1,7 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+enum StorageType { "persistent", "temporary", "default" };
diff --git a/dom/webidl/StyleRuleChangeEvent.webidl b/dom/webidl/StyleRuleChangeEvent.webidl
new file mode 100644
index 000000000..0b783366b
--- /dev/null
+++ b/dom/webidl/StyleRuleChangeEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+interface CSSRule;
+
+[ChromeOnly, Constructor(DOMString type, optional StyleRuleChangeEventInit eventInitDict)]
+interface StyleRuleChangeEvent : Event
+{
+  readonly attribute CSSStyleSheet? stylesheet;
+  readonly attribute CSSRule? rule;
+};
+
+dictionary StyleRuleChangeEventInit : EventInit
+{
+  CSSStyleSheet? stylesheet = null;
+  CSSRule? rule = null;
+};
diff --git a/dom/webidl/StyleSheet.webidl b/dom/webidl/StyleSheet.webidl
new file mode 100644
index 000000000..71a8ccd8f
--- /dev/null
+++ b/dom/webidl/StyleSheet.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/cssom/
+ */
+
+interface CSSRule;
+
+interface StyleSheet {
+  [Constant]
+  readonly attribute DOMString type;
+  [Constant]
+  readonly attribute DOMString? href;
+  // Spec says "Node", but it can go null when the node gets a new
+  // sheet.  That's also why it's not [Constant]
+  [Pure]
+  readonly attribute Node? ownerNode;
+  [Pure]
+  readonly attribute StyleSheet? parentStyleSheet;
+  [Pure]
+  readonly attribute DOMString? title;
+  [Constant]
+  readonly attribute MediaList media;
+  [Pure]
+  attribute boolean disabled;
+};
diff --git a/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl b/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl
new file mode 100644
index 000000000..cb196569f
--- /dev/null
+++ b/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ChromeOnly, Constructor(DOMString type, optional StyleSheetApplicableStateChangeEventInit eventInitDict)]
+interface StyleSheetApplicableStateChangeEvent : Event
+{
+  readonly attribute CSSStyleSheet? stylesheet;
+  readonly attribute boolean applicable;
+};
+
+dictionary StyleSheetApplicableStateChangeEventInit : EventInit
+{
+  CSSStyleSheet? stylesheet = null;
+  boolean applicable = false;
+};
diff --git a/dom/webidl/StyleSheetChangeEvent.webidl b/dom/webidl/StyleSheetChangeEvent.webidl
new file mode 100644
index 000000000..9d04f67cc
--- /dev/null
+++ b/dom/webidl/StyleSheetChangeEvent.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ChromeOnly, Constructor(DOMString type, optional StyleSheetChangeEventInit eventInitDict)]
+interface StyleSheetChangeEvent : Event
+{
+  readonly attribute CSSStyleSheet? stylesheet;
+  readonly attribute boolean documentSheet;
+};
+
+dictionary StyleSheetChangeEventInit : EventInit
+{
+  CSSStyleSheet? stylesheet = null;
+  boolean documentSheet = false;
+};
diff --git a/dom/webidl/StyleSheetList.webidl b/dom/webidl/StyleSheetList.webidl
new file mode 100644
index 000000000..e6091ac29
--- /dev/null
+++ b/dom/webidl/StyleSheetList.webidl
@@ -0,0 +1,8 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface StyleSheetList {
+  readonly attribute unsigned long length;
+  getter StyleSheet? item(unsigned long index);
+};
diff --git a/dom/webidl/SubtleCrypto.webidl b/dom/webidl/SubtleCrypto.webidl
new file mode 100644
index 000000000..328447ee7
--- /dev/null
+++ b/dom/webidl/SubtleCrypto.webidl
@@ -0,0 +1,232 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/WebCryptoAPI/
+ */
+
+typedef DOMString KeyType;
+typedef DOMString KeyUsage;
+typedef DOMString NamedCurve;
+typedef Uint8Array BigInteger;
+
+/***** Algorithm dictionaries *****/
+
+dictionary Algorithm {
+  required DOMString name;
+};
+
+dictionary AesCbcParams : Algorithm {
+  required BufferSource iv;
+};
+
+dictionary AesCtrParams : Algorithm {
+  required BufferSource counter;
+  [EnforceRange] required octet length;
+};
+
+dictionary AesGcmParams : Algorithm {
+  required BufferSource iv;
+  BufferSource additionalData;
+  [EnforceRange] octet tagLength;
+};
+
+dictionary HmacImportParams : Algorithm {
+  required AlgorithmIdentifier hash;
+};
+
+dictionary Pbkdf2Params : Algorithm {
+  required BufferSource salt;
+  [EnforceRange] required unsigned long iterations;
+  required AlgorithmIdentifier hash;
+};
+
+dictionary RsaHashedImportParams {
+  required AlgorithmIdentifier hash;
+};
+
+dictionary AesKeyGenParams : Algorithm {
+  [EnforceRange] required unsigned short length;
+};
+
+dictionary HmacKeyGenParams : Algorithm {
+  required AlgorithmIdentifier hash;
+  [EnforceRange] unsigned long length;
+};
+
+dictionary RsaHashedKeyGenParams : Algorithm {
+  [EnforceRange] required unsigned long modulusLength;
+  required BigInteger publicExponent;
+  required AlgorithmIdentifier hash;
+};
+
+dictionary RsaOaepParams : Algorithm {
+  BufferSource label;
+};
+
+dictionary RsaPssParams : Algorithm {
+  [EnforceRange] required unsigned long saltLength;
+};
+
+dictionary DhKeyGenParams : Algorithm {
+  required BigInteger prime;
+  required BigInteger generator;
+};
+
+dictionary EcKeyGenParams : Algorithm {
+  required NamedCurve namedCurve;
+};
+
+dictionary AesDerivedKeyParams : Algorithm {
+  [EnforceRange] required unsigned long length;
+};
+
+dictionary HmacDerivedKeyParams : HmacImportParams {
+  [EnforceRange] unsigned long length;
+};
+
+dictionary EcdhKeyDeriveParams : Algorithm {
+  required CryptoKey public;
+};
+
+dictionary DhKeyDeriveParams : Algorithm {
+  required CryptoKey public;
+};
+
+dictionary DhImportKeyParams : Algorithm {
+  required BigInteger prime;
+  required BigInteger generator;
+};
+
+dictionary EcdsaParams : Algorithm {
+  required AlgorithmIdentifier hash;
+};
+
+dictionary EcKeyImportParams : Algorithm {
+  NamedCurve namedCurve;
+};
+
+dictionary HkdfParams : Algorithm {
+  required AlgorithmIdentifier hash;
+  required BufferSource salt;
+  required BufferSource info;
+};
+
+/***** JWK *****/
+
+dictionary RsaOtherPrimesInfo {
+  // The following fields are defined in Section 6.3.2.7 of JSON Web Algorithms
+  required DOMString r;
+  required DOMString d;
+  required DOMString t;
+};
+
+dictionary JsonWebKey {
+  // The following fields are defined in Section 3.1 of JSON Web Key
+  required DOMString kty;
+  DOMString use;
+  sequence<DOMString> key_ops;
+  DOMString alg;
+
+  // The following fields are defined in JSON Web Key Parameters Registration
+  boolean ext;
+
+  // The following fields are defined in Section 6 of JSON Web Algorithms
+  DOMString crv;
+  DOMString x;
+  DOMString y;
+  DOMString d;
+  DOMString n;
+  DOMString e;
+  DOMString p;
+  DOMString q;
+  DOMString dp;
+  DOMString dq;
+  DOMString qi;
+  sequence<RsaOtherPrimesInfo> oth;
+  DOMString k;
+};
+
+
+/***** The Main API *****/
+
+interface CryptoKey {
+  readonly attribute KeyType type;
+  readonly attribute boolean extractable;
+  [Cached, Constant, Throws] readonly attribute object algorithm;
+  [Cached, Constant, Frozen] readonly attribute sequence<KeyUsage> usages;
+};
+
+dictionary CryptoKeyPair {
+  required CryptoKey publicKey;
+  required CryptoKey privateKey;
+};
+
+typedef DOMString KeyFormat;
+typedef (object or DOMString) AlgorithmIdentifier;
+
+[Exposed=(Window,Worker)]
+interface SubtleCrypto {
+  [Throws]
+  Promise<any> encrypt(AlgorithmIdentifier algorithm,
+                       CryptoKey key,
+                       BufferSource data);
+  [Throws]
+  Promise<any> decrypt(AlgorithmIdentifier algorithm,
+                       CryptoKey key,
+                       BufferSource data);
+  [Throws]
+  Promise<any> sign(AlgorithmIdentifier algorithm,
+                     CryptoKey key,
+                     BufferSource data);
+  [Throws]
+  Promise<any> verify(AlgorithmIdentifier algorithm,
+                      CryptoKey key,
+                      BufferSource signature,
+                      BufferSource data);
+  [Throws]
+  Promise<any> digest(AlgorithmIdentifier algorithm,
+                      BufferSource data);
+
+  [Throws]
+  Promise<any> generateKey(AlgorithmIdentifier algorithm,
+                           boolean extractable,
+                           sequence<KeyUsage> keyUsages );
+  [Throws]
+  Promise<any> deriveKey(AlgorithmIdentifier algorithm,
+                         CryptoKey baseKey,
+                         AlgorithmIdentifier derivedKeyType,
+                         boolean extractable,
+                         sequence<KeyUsage> keyUsages );
+  [Throws]
+  Promise<any> deriveBits(AlgorithmIdentifier algorithm,
+                          CryptoKey baseKey,
+                          unsigned long length);
+
+  [Throws]
+  Promise<any> importKey(KeyFormat format,
+                         object keyData,
+                         AlgorithmIdentifier algorithm,
+                         boolean extractable,
+                         sequence<KeyUsage> keyUsages );
+  [Throws]
+  Promise<any> exportKey(KeyFormat format, CryptoKey key);
+
+  [Throws]
+  Promise<any> wrapKey(KeyFormat format,
+                       CryptoKey key,
+                       CryptoKey wrappingKey,
+                       AlgorithmIdentifier wrapAlgorithm);
+
+  [Throws]
+  Promise<any> unwrapKey(KeyFormat format,
+                         BufferSource wrappedKey,
+                         CryptoKey unwrappingKey,
+                         AlgorithmIdentifier unwrapAlgorithm,
+                         AlgorithmIdentifier unwrappedKeyAlgorithm,
+                         boolean extractable,
+                         sequence<KeyUsage> keyUsages );
+};
+
diff --git a/dom/webidl/SystemUpdate.webidl b/dom/webidl/SystemUpdate.webidl
new file mode 100644
index 000000000..bd7857b4d
--- /dev/null
+++ b/dom/webidl/SystemUpdate.webidl
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+dictionary SystemUpdateProviderInfo {
+  DOMString name = "";
+  DOMString uuid = "";
+};
+
+dictionary SystemUpdatePackageInfo {
+  DOMString type = "";
+  DOMString version = "";
+  DOMString description = "";
+  DOMTimeStamp buildDate = 0;
+  unsigned long long size = 0;
+};
+
+[JSImplementation="@mozilla.org/system-update-provider;1",
+ ChromeOnly,
+ Pref="dom.system_update.enabled"]
+interface SystemUpdateProvider : EventTarget {
+  readonly attribute DOMString name;
+  readonly attribute DOMString uuid;
+
+  attribute EventHandler onupdateavailable;
+  attribute EventHandler onprogress;
+  attribute EventHandler onupdateready;
+  attribute EventHandler onerror;
+
+  void checkForUpdate();
+  void startDownload();
+  void stopDownload();
+  void applyUpdate();
+  boolean setParameter(DOMString name, DOMString value);
+  DOMString getParameter(DOMString name);
+};
+
+[NavigatorProperty="updateManager",
+ JSImplementation="@mozilla.org/system-update-manager;1",
+ ChromeOnly,
+ Pref="dom.system_update.enabled"]
+interface SystemUpdateManager {
+  Promise<sequence<SystemUpdateProviderInfo>> getProviders();
+
+  Promise<SystemUpdateProvider> setActiveProvider(DOMString uuid);
+
+  Promise<SystemUpdateProvider> getActiveProvider();
+};
diff --git a/dom/webidl/TCPServerSocket.webidl b/dom/webidl/TCPServerSocket.webidl
new file mode 100644
index 000000000..06d6689d2
--- /dev/null
+++ b/dom/webidl/TCPServerSocket.webidl
@@ -0,0 +1,42 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * TCPServerSocket
+ *
+ * An interface to a server socket that can accept incoming connections for gaia apps.
+ */
+
+dictionary ServerSocketOptions {
+  TCPSocketBinaryType binaryType = "string";
+};
+
+[Constructor(unsigned short port, optional ServerSocketOptions options, optional unsigned short backlog = 0),
+ Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist",
+ Exposed=(Window,System)]
+interface TCPServerSocket : EventTarget {
+  /**
+   * The port of this server socket object.
+   */
+  readonly attribute unsigned short localPort;
+
+  /**
+   * The "connect" event is dispatched when a client connection is accepted.
+   * The event object will be a TCPServerSocketEvent containing a TCPSocket
+   * instance, which is used for communication between client and server.
+   */
+  attribute EventHandler onconnect;
+
+  /**
+   * The "error" event will be dispatched when a listening server socket is
+   * unexpectedly disconnected.
+   */
+  attribute EventHandler onerror;
+
+  /**
+   * Close the server socket.
+   */
+  void close();
+};
diff --git a/dom/webidl/TCPServerSocketEvent.webidl b/dom/webidl/TCPServerSocketEvent.webidl
new file mode 100644
index 000000000..f133ae781
--- /dev/null
+++ b/dom/webidl/TCPServerSocketEvent.webidl
@@ -0,0 +1,15 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Constructor(DOMString type, optional TCPServerSocketEventInit eventInitDict),
+ Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist",
+ Exposed=(Window,System)]
+interface TCPServerSocketEvent : Event {
+  readonly attribute TCPSocket socket;
+};
+
+dictionary TCPServerSocketEventInit : EventInit {
+  TCPSocket? socket = null;
+};
diff --git a/dom/webidl/TCPSocket.webidl b/dom/webidl/TCPSocket.webidl
new file mode 100644
index 000000000..42c6c2f73
--- /dev/null
+++ b/dom/webidl/TCPSocket.webidl
@@ -0,0 +1,210 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * TCPSocket exposes a TCP client socket (no server sockets yet)
+ * to highly privileged apps. It provides a buffered, non-blocking
+ * interface for sending. For receiving, it uses an asynchronous,
+ * event handler based interface.
+ */
+
+enum TCPSocketBinaryType {
+  "arraybuffer",
+  "string"
+};
+
+dictionary SocketOptions {
+  boolean useSecureTransport = false;
+  TCPSocketBinaryType binaryType = "string";
+};
+
+enum TCPReadyState {
+  "connecting",
+  "open",
+  "closing",
+  "closed",
+};
+
+[NoInterfaceObject]
+interface LegacyMozTCPSocket {
+  /**
+   * Legacy constructor for API compatibility.
+   */
+  [Throws]
+  TCPSocket open(DOMString host, unsigned short port, optional SocketOptions options);
+
+  [Throws]
+  TCPServerSocket listen(unsigned short port, optional ServerSocketOptions options, optional unsigned short backlog = 0);
+};
+
+[Constructor(DOMString host, unsigned short port, optional SocketOptions options),
+ Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist",
+ Exposed=(Window,System)]
+interface TCPSocket : EventTarget {
+  /**
+   * Upgrade an insecure connection to use TLS. Throws if the ready state is not OPEN.
+   */
+  [Throws] void upgradeToSecure();
+
+  /**
+   * The UTF16 host of this socket object.
+   */
+  readonly attribute USVString host;
+
+  /**
+   * The port of this socket object.
+   */
+  readonly attribute unsigned short port;
+
+  /**
+   * True if this socket object is an SSL socket.
+   */
+  readonly attribute boolean ssl;
+
+  /**
+   * The number of bytes which have previously been buffered by calls to
+   * send on this socket.
+   */
+  readonly attribute unsigned long long bufferedAmount;
+
+  /**
+   * Pause reading incoming data and invocations of the ondata handler until
+   * resume is called. Can be called multiple times without resuming.
+   */
+  void suspend();
+
+  /**
+   * Resume reading incoming data and invoking ondata as usual. There must be
+   * an equal number of resume as suspends that took place. Throws if the
+   * socket is not suspended.
+   */
+  [Throws]
+  void resume();
+
+  /**
+   * Close the socket.
+   */
+  void close();
+
+  /**
+   * Close the socket immediately without waiting for unsent data.
+   */
+  [ChromeOnly] void closeImmediately();
+
+  /**
+   * Write data to the socket.
+   *
+   * @param data The data to write to the socket.
+   *
+   * @return Send returns true or false as a hint to the caller that
+   *         they may either continue sending more data immediately, or
+   *         may want to wait until the other side has read some of the
+   *         data which has already been written to the socket before
+   *         buffering more. If send returns true, then less than 64k
+   *         has been buffered and it's safe to immediately write more.
+   *         If send returns false, then more than 64k has been buffered,
+   *         and the caller may wish to wait until the ondrain event
+   *         handler has been called before buffering more data by more
+   *         calls to send.
+   * 
+   * @throws Throws if the ready state is not OPEN.
+   */
+  [Throws]
+  boolean send(ByteString data);
+
+  /**
+   * Write data to the socket.
+   *
+   * @param data The data to write to the socket.
+   * @param byteOffset The offset within the data from which to begin writing.
+   * @param byteLength The number of bytes to write.
+   *                   Defaults to the byte length of the ArrayBuffer if not present,
+   *                   and clamped to (length - byteOffset).
+   *
+   * @return Send returns true or false as a hint to the caller that
+   *         they may either continue sending more data immediately, or
+   *         may want to wait until the other side has read some of the
+   *         data which has already been written to the socket before
+   *         buffering more. If send returns true, then less than 64k
+   *         has been buffered and it's safe to immediately write more.
+   *         If send returns false, then more than 64k has been buffered,
+   *         and the caller may wish to wait until the ondrain event
+   *         handler has been called before buffering more data by more
+   *         calls to send.
+   * 
+   * @throws Throws if the ready state is not OPEN.
+   */
+  [Throws]
+  boolean send(ArrayBuffer data, optional unsigned long byteOffset = 0, optional unsigned long byteLength);
+
+  /**
+   * The readyState attribute indicates which state the socket is currently
+   * in.
+   */
+  readonly attribute TCPReadyState readyState;
+
+  /**
+   * The binaryType attribute indicates which mode this socket uses for
+   * sending and receiving data. If the binaryType: "arraybuffer" option
+   * was passed to the open method that created this socket, binaryType
+   * will be "arraybuffer". Otherwise, it will be "string".
+   */
+  readonly attribute TCPSocketBinaryType binaryType;
+
+  /**
+   * The "open" event is dispatched when the connection to the server
+   * has been established. If the connection is refused, the "error" event
+   * will be dispatched, instead.
+   */
+  attribute EventHandler onopen;
+
+  /**
+   * After send has buffered more than 64k of data, it returns false to
+   * indicate that the client should pause before sending more data, to
+   * avoid accumulating large buffers. This is only advisory, and the client
+   * is free to ignore it and buffer as much data as desired, but if reducing
+   * the size of buffers is important (especially for a streaming application)
+   * the "drain" event will be dispatched once the previously-buffered data has
+   * been written to the network, at which point the client can resume calling
+   * send again.
+   */
+  attribute EventHandler ondrain;
+
+  /**
+   * The "data" event will be dispatched repeatedly and asynchronously after
+   * "open" is dispatched, every time some data was available from the server
+   * and was read. The event object will be a TCPSocketEvent; if the "arraybuffer"
+   * binaryType was passed to the constructor, the data attribute of the event
+   * object will be an ArrayBuffer. If not, it will be a normal JavaScript string,
+   * truncated at the first null byte found in the payload and the remainder
+   * interpreted as ASCII bytes.
+   *
+   * At any time, the client may choose to pause reading and receiving "data"
+   * events by calling the socket's suspend() method. Further "data" events
+   * will be paused until resume() is called.
+   */
+  attribute EventHandler ondata;
+
+  /**
+   * The "error" event will be dispatched when there is an error. The event
+   * object will be a TCPSocketErrorEvent.
+   *
+   * If an "error" event is dispatched before an "open" one, the connection
+   * was refused, and the "close" event will not be dispatched. If an "error"
+   * event is dispatched after an "open" event, the connection was lost,
+   * and a "close" event will be dispatched subsequently.
+   */
+  attribute EventHandler onerror;
+
+  /**
+   * The "close" event is dispatched once the underlying network socket
+   * has been closed, either by the server, or by the client calling
+   * close.
+   *
+   * If the "error" event was not dispatched before "close", then one of
+   * the sides cleanly closed the connection.
+   */
+  attribute EventHandler onclose;  
+};
diff --git a/dom/webidl/TCPSocketErrorEvent.webidl b/dom/webidl/TCPSocketErrorEvent.webidl
new file mode 100644
index 000000000..22db1b768
--- /dev/null
+++ b/dom/webidl/TCPSocketErrorEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Dispatched as part of the "error" event in the following situations:
+* - if there's an error detected when the TCPSocket closes
+* - if there's an internal error while sending data
+* - if there's an error connecting to the host
+*/
+
+[Constructor(DOMString type, optional TCPSocketErrorEventInit eventInitDict),
+ Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist",
+ Exposed=(Window,System)]
+interface TCPSocketErrorEvent : Event {
+  readonly attribute DOMString name;
+  readonly attribute DOMString message;
+};
+
+dictionary TCPSocketErrorEventInit : EventInit
+{
+  DOMString name = "";
+  DOMString message = "";
+};
diff --git a/dom/webidl/TCPSocketEvent.webidl b/dom/webidl/TCPSocketEvent.webidl
new file mode 100644
index 000000000..6a3d6851d
--- /dev/null
+++ b/dom/webidl/TCPSocketEvent.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * TCPSocketEvent is the event dispatched for all of the events described by TCPSocket,
+ * except the "error" event. It contains the socket that was associated with the event,
+ * the type of event, and the data associated with the event if the event is a "data" event.
+ */
+
+[Constructor(DOMString type, optional TCPSocketEventInit eventInitDict),
+ Func="mozilla::dom::TCPSocket::ShouldTCPSocketExist",
+ Exposed=(Window,System)]
+interface TCPSocketEvent : Event {
+  /**
+   * If the event is a "data" event, data will be the bytes read from the network;
+   * if the binaryType of the socket was "arraybuffer", this value will be of type
+   * ArrayBuffer, otherwise, it will be a ByteString.
+   *
+   * For other events, data will be an empty string.
+   */
+  //TODO: make this (ArrayBuffer or ByteString) after sorting out the rooting required. (bug 1121634)
+  readonly attribute any data;
+};
+
+dictionary TCPSocketEventInit : EventInit {
+  //TODO: make this (ArrayBuffer or ByteString) after sorting out the rooting required. (bug 1121634)
+  any data = null;
+};
diff --git a/dom/webidl/TestFunctions.webidl b/dom/webidl/TestFunctions.webidl
new file mode 100644
index 000000000..c0db0b644
--- /dev/null
+++ b/dom/webidl/TestFunctions.webidl
@@ -0,0 +1,41 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// A dumping ground for random testing functions
+
+callback PromiseReturner = Promise<any>();
+
+[Pref="dom.expose_test_interfaces",
+ Constructor]
+interface TestFunctions {
+  [Throws]
+  static void throwUncatchableException();
+
+  // Simply returns its argument.  Can be used to test Promise
+  // argument processing behavior.
+  static Promise<any> passThroughPromise(Promise<any> arg);
+
+  // Returns whatever Promise the given PromiseReturner returned.
+  [Throws]
+  static Promise<any> passThroughCallbackPromise(PromiseReturner callback);
+
+  // Some basic tests for string binding round-tripping behavior.
+  void setStringData(DOMString arg);
+
+  // Get the string data, using an nsAString argument on the C++ side.
+  // This will just use Assign/operator=, whatever that does.
+  DOMString getStringDataAsAString();
+
+  // Get the string data, but only "length" chars of it, using an
+  // nsAString argument on the C++ side.  This will always copy on the
+  // C++ side.
+  DOMString getStringDataAsAString(unsigned long length);
+
+  // Get the string data, but only "length" chars of it, using a
+  // DOMString argument on the C++ side and trying to hand it
+  // stringbuffers.  If length not passed, use our full length.
+  DOMString getStringDataAsDOMString(optional unsigned long length);
+};
diff --git a/dom/webidl/TestInterfaceJS.webidl b/dom/webidl/TestInterfaceJS.webidl
new file mode 100644
index 000000000..2757745f0
--- /dev/null
+++ b/dom/webidl/TestInterfaceJS.webidl
@@ -0,0 +1,84 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+dictionary TestInterfaceJSUnionableDictionary {
+  object objectMember;
+  any anyMember;
+};
+
+[JSImplementation="@mozilla.org/dom/test-interface-js;1",
+ Pref="dom.expose_test_interfaces",
+ Constructor(optional any anyArg, optional object objectArg, optional TestInterfaceJSDictionary dictionaryArg)]
+interface TestInterfaceJS : EventTarget {
+  readonly attribute any anyArg;
+  readonly attribute object objectArg;
+  [Cached, Pure] readonly attribute TestInterfaceJSDictionary dictionaryArg;
+  attribute any anyAttr;
+  attribute object objectAttr;
+  [Cached, Pure] attribute TestInterfaceJSDictionary dictionaryAttr;
+  any pingPongAny(any arg);
+  object pingPongObject(object obj);
+  any pingPongObjectOrString((object or DOMString) objOrString);
+  TestInterfaceJSDictionary pingPongDictionary(optional TestInterfaceJSDictionary dict);
+  long pingPongDictionaryOrLong(optional (TestInterfaceJSUnionableDictionary or long) dictOrLong);
+  DOMString pingPongMap(record<DOMString, any> map);
+  long objectSequenceLength(sequence<object> seq);
+  long anySequenceLength(sequence<any> seq);
+
+  // For testing bug 968335.
+  DOMString getCallerPrincipal();
+
+  DOMString convertSVS(USVString svs);
+
+  (TestInterfaceJS or long) pingPongUnion((TestInterfaceJS or long) something);
+  (DOMString or TestInterfaceJS?) pingPongUnionContainingNull((TestInterfaceJS? or DOMString) something);
+  (TestInterfaceJS or long)? pingPongNullableUnion((TestInterfaceJS or long)? something);
+  (Location or TestInterfaceJS) returnBadUnion();
+
+  [Cached, Pure]
+  readonly attribute short cachedAttr;
+  void setCachedAttr(short n);
+  void clearCachedAttrCache();
+
+  // Test for sequence overloading and union behavior
+  void testSequenceOverload(sequence<DOMString> arg);
+  void testSequenceOverload(DOMString arg);
+
+  void testSequenceUnion((sequence<DOMString> or DOMString) arg);
+
+  // Tests for exception-throwing behavior
+  [Throws]
+  void testThrowError();
+
+  [Throws]
+  void testThrowDOMException();
+
+  [Throws]
+  void testThrowTypeError();
+
+  [Throws]
+  void testThrowCallbackError(Function callback);
+
+  [Throws]
+  void testThrowXraySelfHosted();
+
+  [Throws]
+  void testThrowSelfHosted();
+
+  // Tests for promise-rejection behavior
+  Promise<void> testPromiseWithThrowingChromePromiseInit();
+  Promise<void> testPromiseWithThrowingContentPromiseInit(Function func);
+  Promise<void> testPromiseWithDOMExceptionThrowingPromiseInit();
+  Promise<void> testPromiseWithThrowingChromeThenFunction();
+  Promise<void> testPromiseWithThrowingContentThenFunction(AnyCallback func);
+  Promise<void> testPromiseWithDOMExceptionThrowingThenFunction();
+  Promise<void> testPromiseWithThrowingChromeThenable();
+  Promise<void> testPromiseWithThrowingContentThenable(object thenable);
+  Promise<void> testPromiseWithDOMExceptionThrowingThenable();
+
+  // Event handler tests
+  attribute EventHandler onsomething;
+};
diff --git a/dom/webidl/TestInterfaceJSDictionaries.webidl b/dom/webidl/TestInterfaceJSDictionaries.webidl
new file mode 100644
index 000000000..366864a8d
--- /dev/null
+++ b/dom/webidl/TestInterfaceJSDictionaries.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+//
+// These dictionaries are in a separate WebIDL file to avoid circular include
+// problems. One of the dictionary includes a union as a member, so that
+// dictionary's header needs to include UnionTypes.h. But the API in
+// TestInterfaceJS also declares a union of dictionaries, so _that_
+// dictionary's header needs to be included _by_ UnionTypes.h. The solution
+// is to separate those two dictionaries into separate header files.
+//
+
+dictionary TestInterfaceJSDictionary2 {
+  object innerObject;
+};
+
+dictionary TestInterfaceJSDictionary {
+  TestInterfaceJSDictionary2 innerDictionary;
+  object objectMember;
+  any anyMember;
+  (object or DOMString) objectOrStringMember;
+  sequence<any> anySequenceMember;
+};
+
diff --git a/dom/webidl/TestInterfaceJSMaplikeSetlikeIterable.webidl b/dom/webidl/TestInterfaceJSMaplikeSetlikeIterable.webidl
new file mode 100644
index 000000000..9a953784c
--- /dev/null
+++ b/dom/webidl/TestInterfaceJSMaplikeSetlikeIterable.webidl
@@ -0,0 +1,68 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceMaplike {
+  maplike<DOMString, long>;
+  void setInternal(DOMString aKey, long aValue);
+  void clearInternal();
+  boolean deleteInternal(DOMString aKey);
+  boolean hasInternal(DOMString aKey);
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceMaplikeObject {
+  readonly maplike<DOMString, TestInterfaceMaplike>;
+  void setInternal(DOMString aKey);
+  void clearInternal();
+  boolean deleteInternal(DOMString aKey);
+  boolean hasInternal(DOMString aKey);
+};
+
+[Pref="dom.expose_test_interfaces",
+ JSImplementation="@mozilla.org/dom/test-interface-js-maplike;1",
+ Constructor()]
+interface TestInterfaceJSMaplike {
+  readonly maplike<DOMString, long>;
+  void setInternal(DOMString aKey, long aValue);
+  void clearInternal();
+  boolean deleteInternal(DOMString aKey);
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceSetlike {
+  setlike<DOMString>;
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceSetlikeNode {
+  setlike<Node>;
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceIterableSingle {
+  iterable<long>;
+  getter long(unsigned long index);
+  readonly attribute unsigned long length;
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceIterableDouble {
+  iterable<DOMString, DOMString>;
+};
+
+[Constructor(),
+ Pref="dom.expose_test_interfaces"]
+interface TestInterfaceIterableDoubleUnion {
+  iterable<DOMString, (DOMString or long)>;
+};
+
diff --git a/dom/webidl/Text.webidl b/dom/webidl/Text.webidl
new file mode 100644
index 000000000..fb7b5d685
--- /dev/null
+++ b/dom/webidl/Text.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(optional DOMString data = "")]
+interface Text : CharacterData {
+  [Throws]
+  Text splitText(unsigned long offset);
+  [Throws]
+  readonly attribute DOMString wholeText;
+};
+
+partial interface Text {
+  [BinaryName="assignedSlotByMode", Func="nsTextNode::IsWebComponentsEnabled"]
+  readonly attribute HTMLSlotElement? assignedSlot;
+};
+
+Text implements GeometryUtils;
diff --git a/dom/webidl/TextClause.webidl b/dom/webidl/TextClause.webidl
new file mode 100644
index 000000000..2baeeb2d7
--- /dev/null
+++ b/dom/webidl/TextClause.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ChromeOnly]
+interface TextClause
+{
+  // The start offset of TextClause
+  readonly attribute long startOffset;
+
+  // The end offset of TextClause
+  readonly attribute long endOffset;
+
+  // If the TextClause is Caret or not
+  readonly attribute boolean isCaret;
+
+  // If the TextClause is TargetClause or not
+  readonly attribute boolean isTargetClause;
+};
diff --git a/dom/webidl/TextDecoder.webidl b/dom/webidl/TextDecoder.webidl
new file mode 100644
index 000000000..3fff4a255
--- /dev/null
+++ b/dom/webidl/TextDecoder.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://encoding.spec.whatwg.org/#interface-textdecoder
+ *
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+[Constructor(optional DOMString label = "utf-8", optional TextDecoderOptions options),
+ Exposed=(Window,Worker,System)]
+interface TextDecoder {
+  [Constant]
+  readonly attribute DOMString encoding;
+  [Constant]
+  readonly attribute boolean fatal;
+  [Throws]
+  USVString decode(optional BufferSource input, optional TextDecodeOptions options);
+};
+
+dictionary TextDecoderOptions {
+  boolean fatal = false;
+};
+
+dictionary TextDecodeOptions {
+  boolean stream = false;
+};
+
diff --git a/dom/webidl/TextEncoder.webidl b/dom/webidl/TextEncoder.webidl
new file mode 100644
index 000000000..9269b572d
--- /dev/null
+++ b/dom/webidl/TextEncoder.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://encoding.spec.whatwg.org/#interface-textencoder
+ *
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+[Constructor,
+ Exposed=(Window,Worker,System)]
+interface TextEncoder {
+  [Constant]
+  readonly attribute DOMString encoding;
+  [NewObject]
+  Uint8Array encode(optional USVString input = "");
+};
diff --git a/dom/webidl/TextTrack.webidl b/dom/webidl/TextTrack.webidl
new file mode 100644
index 000000000..442a1667f
--- /dev/null
+++ b/dom/webidl/TextTrack.webidl
@@ -0,0 +1,48 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#texttrack
+ */
+
+enum TextTrackKind {
+  "subtitles",
+  "captions",
+  "descriptions",
+  "chapters",
+  "metadata"
+};
+
+enum TextTrackMode {
+  "disabled",
+  "hidden",
+  "showing"
+};
+
+interface TextTrack : EventTarget {
+  readonly attribute TextTrackKind kind;
+  readonly attribute DOMString label;
+  readonly attribute DOMString language;
+
+  readonly attribute DOMString id;
+  readonly attribute DOMString inBandMetadataTrackDispatchType;
+
+           attribute TextTrackMode mode;
+
+  readonly attribute TextTrackCueList? cues;
+  readonly attribute TextTrackCueList? activeCues;
+
+  void addCue(VTTCue cue);
+  [Throws]
+  void removeCue(VTTCue cue);
+
+           attribute EventHandler oncuechange;
+};
+
+// Mozilla Extensions
+partial interface TextTrack {
+  [ChromeOnly]
+  readonly attribute TextTrackList? textTrackList;
+};
diff --git a/dom/webidl/TextTrackCue.webidl b/dom/webidl/TextTrackCue.webidl
new file mode 100644
index 000000000..2dc242dd1
--- /dev/null
+++ b/dom/webidl/TextTrackCue.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://html.spec.whatwg.org/#texttrackcue
+ */
+
+interface TextTrackCue : EventTarget {
+  readonly attribute TextTrack? track;
+
+  attribute DOMString id;
+  attribute double startTime;
+  attribute double endTime;
+  attribute boolean pauseOnExit;
+
+  attribute EventHandler onenter;
+  attribute EventHandler onexit;
+};
diff --git a/dom/webidl/TextTrackCueList.webidl b/dom/webidl/TextTrackCueList.webidl
new file mode 100644
index 000000000..0854004bd
--- /dev/null
+++ b/dom/webidl/TextTrackCueList.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#texttrackcuelist
+ */
+
+interface TextTrackCueList {
+  readonly attribute unsigned long length;
+  getter VTTCue (unsigned long index);
+  VTTCue? getCueById(DOMString id);
+};
diff --git a/dom/webidl/TextTrackList.webidl b/dom/webidl/TextTrackList.webidl
new file mode 100644
index 000000000..1150871e3
--- /dev/null
+++ b/dom/webidl/TextTrackList.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#texttracklist
+ */
+
+interface TextTrackList : EventTarget {
+  readonly attribute unsigned long length;
+  getter TextTrack (unsigned long index);
+  TextTrack? getTrackById(DOMString id);
+
+           attribute EventHandler onchange;
+           attribute EventHandler onaddtrack;
+           attribute EventHandler onremovetrack;
+};
+
+// Mozilla extensions
+partial interface TextTrackList {
+  [ChromeOnly]
+  readonly attribute HTMLMediaElement? mediaElement;
+};
diff --git a/dom/webidl/ThreadSafeChromeUtils.webidl b/dom/webidl/ThreadSafeChromeUtils.webidl
new file mode 100644
index 000000000..8d0f21734
--- /dev/null
+++ b/dom/webidl/ThreadSafeChromeUtils.webidl
@@ -0,0 +1,140 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+/**
+ * A collection of **thread-safe** static utility methods that are only exposed
+ * to Chrome. This interface is exposed in workers, while ChromeUtils is not.
+ */
+[ChromeOnly, Exposed=(Window,System,Worker)]
+interface ThreadSafeChromeUtils {
+  /**
+   * Serialize a snapshot of the heap graph, as seen by |JS::ubi::Node| and
+   * restricted by |boundaries|, and write it to the provided file path.
+   *
+   * @param boundaries        The portion of the heap graph to write.
+   *
+   * @returns                 The path to the file the heap snapshot was written
+   *                          to. This is guaranteed to be within the temp
+   *                          directory and its file name will match the regexp
+   *                          `\d+(\-\d+)?\.fxsnapshot`.
+   */
+  [Throws]
+  static DOMString saveHeapSnapshot(optional HeapSnapshotBoundaries boundaries);
+
+  /**
+   * Deserialize a core dump into a HeapSnapshot.
+   *
+   * @param filePath          The file path to read the heap snapshot from.
+   */
+  [Throws, NewObject]
+  static HeapSnapshot readHeapSnapshot(DOMString filePath);
+
+  /**
+   * Return the keys in a weak map.  This operation is
+   * non-deterministic because it is affected by the scheduling of the
+   * garbage collector and the cycle collector.
+   *
+   * @param aMap weak map or other JavaScript value
+   * @returns If aMap is a weak map object, return the keys of the weak
+   *          map as an array.  Otherwise, return undefined.
+   */
+  [Throws, NewObject]
+  static any nondeterministicGetWeakMapKeys(any map);
+
+  /**
+   * Return the keys in a weak set.  This operation is
+   * non-deterministic because it is affected by the scheduling of the
+   * garbage collector and the cycle collector.
+   *
+   * @param aSet weak set or other JavaScript value
+   * @returns If aSet is a weak set object, return the keys of the weak
+   *          set as an array.  Otherwise, return undefined.
+   */
+  [Throws, NewObject]
+  static any nondeterministicGetWeakSetKeys(any aSet);
+
+  /**
+   * Converts a buffer to a Base64 URL-encoded string per RFC 4648.
+   *
+   * @param source The buffer to encode.
+   * @param options Additional encoding options.
+   * @returns The encoded string.
+   */
+  [Throws]
+  static ByteString base64URLEncode(BufferSource source,
+                                    Base64URLEncodeOptions options);
+
+  /**
+   * Decodes a Base64 URL-encoded string per RFC 4648.
+   *
+   * @param string The string to decode.
+   * @param options Additional decoding options.
+   * @returns The decoded buffer.
+   */
+  [Throws, NewObject]
+  static ArrayBuffer base64URLDecode(ByteString string,
+                                     Base64URLDecodeOptions options);
+};
+
+/**
+ * A JS object whose properties specify what portion of the heap graph to
+ * write. The recognized properties are:
+ *
+ * * globals: [ global, ... ]
+ *   Dump only nodes that either:
+ *   - belong in the compartment of one of the given globals;
+ *   - belong to no compartment, but do belong to a Zone that contains one of
+ *     the given globals;
+ *   - are referred to directly by one of the last two kinds of nodes; or
+ *   - is the fictional root node, described below.
+ *
+ * * debugger: Debugger object
+ *   Like "globals", but use the Debugger's debuggees as the globals.
+ *
+ * * runtime: true
+ *   Dump the entire heap graph, starting with the JSRuntime's roots.
+ *
+ * One, and only one, of these properties must exist on the boundaries object.
+ *
+ * The root of the dumped graph is a fictional node whose ubi::Node type name is
+ * "CoreDumpRoot". If we are dumping the entire ubi::Node graph, this root node
+ * has an edge for each of the JSRuntime's roots. If we are dumping a selected
+ * set of globals, the root has an edge to each global, and an edge for each
+ * incoming JS reference to the selected Zones.
+ */
+dictionary HeapSnapshotBoundaries {
+  sequence<object> globals;
+  object           debugger;
+  boolean          runtime;
+};
+
+dictionary Base64URLEncodeOptions {
+  /** Specifies whether the output should be padded with "=" characters. */
+  required boolean pad;
+};
+
+enum Base64URLDecodePadding {
+  /**
+   * Fails decoding if the input is unpadded. RFC 4648, section 3.2 requires
+   * padding, unless the referring specification prohibits it.
+   */
+  "require",
+
+  /** Tolerates padded and unpadded input. */
+  "ignore",
+
+  /**
+   * Fails decoding if the input is padded. This follows the strict base64url
+   * variant used in JWS (RFC 7515, Appendix C) and HTTP Encrypted
+   * Content-Encoding (draft-ietf-httpbis-encryption-encoding-01).
+   */
+  "reject"
+};
+
+dictionary Base64URLDecodeOptions {
+  /** Specifies the padding mode for decoding the input. */
+  required Base64URLDecodePadding padding;
+};
diff --git a/dom/webidl/TimeEvent.webidl b/dom/webidl/TimeEvent.webidl
new file mode 100644
index 000000000..8bbe4db53
--- /dev/null
+++ b/dom/webidl/TimeEvent.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface TimeEvent : Event
+{
+  readonly attribute long         detail;
+  readonly attribute WindowProxy? view;
+  void initTimeEvent(DOMString aType,
+                     optional Window? aView = null,
+                     optional long aDetail = 0);
+};
diff --git a/dom/webidl/TimeRanges.webidl b/dom/webidl/TimeRanges.webidl
new file mode 100644
index 000000000..9f9b5270b
--- /dev/null
+++ b/dom/webidl/TimeRanges.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#timeranges
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface TimeRanges {
+  readonly attribute unsigned long length;
+
+  [Throws]
+  double start(unsigned long index);
+
+  [Throws]
+  double end(unsigned long index);
+};
diff --git a/dom/webidl/Touch.webidl b/dom/webidl/Touch.webidl
new file mode 100644
index 000000000..cefb44674
--- /dev/null
+++ b/dom/webidl/Touch.webidl
@@ -0,0 +1,43 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/webevents/raw-file/default/touchevents.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+dictionary TouchInit {
+  required long identifier;
+  required EventTarget target;
+  long clientX = 0;
+  long clientY = 0;
+  long screenX = 0;
+  long screenY = 0;
+  long pageX = 0;
+  long pageY = 0;
+  float radiusX = 0;
+  float radiusY = 0;
+  float rotationAngle = 0;
+  float force = 0;
+};
+
+[Constructor(TouchInit touchInitDict), 
+ Func="mozilla::dom::Touch::PrefEnabled"]
+interface Touch {
+  readonly    attribute long         identifier;
+  readonly    attribute EventTarget? target;
+  readonly    attribute long         screenX;
+  readonly    attribute long         screenY;
+  readonly    attribute long         clientX;
+  readonly    attribute long         clientY;
+  readonly    attribute long         pageX;
+  readonly    attribute long         pageY;
+  readonly    attribute long         radiusX;
+  readonly    attribute long         radiusY;
+  readonly    attribute float        rotationAngle;
+  readonly    attribute float        force;
+};
diff --git a/dom/webidl/TouchEvent.webidl b/dom/webidl/TouchEvent.webidl
new file mode 100644
index 000000000..fd677787a
--- /dev/null
+++ b/dom/webidl/TouchEvent.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+dictionary TouchEventInit : EventModifierInit {
+  sequence<Touch> touches = [];
+  sequence<Touch> targetTouches = [];
+  sequence<Touch> changedTouches = [];
+};
+
+[Constructor(DOMString type, optional TouchEventInit eventInitDict),
+ Func="mozilla::dom::TouchEvent::PrefEnabled"]
+interface TouchEvent : UIEvent {
+  readonly attribute TouchList touches;
+  readonly attribute TouchList targetTouches;
+  readonly attribute TouchList changedTouches;
+
+  readonly attribute boolean altKey;
+  readonly attribute boolean metaKey;
+  readonly attribute boolean ctrlKey;
+  readonly attribute boolean shiftKey;
+
+  void initTouchEvent(DOMString type,
+                      optional boolean canBubble = false,
+                      optional boolean cancelable = false,
+                      optional Window? view = null,
+                      optional long detail = 0,
+                      optional boolean ctrlKey = false,
+                      optional boolean altKey = false,
+                      optional boolean shiftKey = false,
+                      optional boolean metaKey = false,
+                      optional TouchList? touches = null,
+                      optional TouchList? targetTouches = null,
+                      optional TouchList? changedTouches = null);
+};
diff --git a/dom/webidl/TouchList.webidl b/dom/webidl/TouchList.webidl
new file mode 100644
index 000000000..562a7fb4f
--- /dev/null
+++ b/dom/webidl/TouchList.webidl
@@ -0,0 +1,18 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://dvcs.w3.org/hg/webevents/raw-file/v1/touchevents.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="mozilla::dom::TouchList::PrefEnabled"]
+interface TouchList {
+  [Pure]
+  readonly attribute unsigned long length;
+  getter Touch? item(unsigned long index);
+};
diff --git a/dom/webidl/TrackEvent.webidl b/dom/webidl/TrackEvent.webidl
new file mode 100644
index 000000000..2daa2f457
--- /dev/null
+++ b/dom/webidl/TrackEvent.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#trackevent
+ */
+
+[Constructor(DOMString type, optional TrackEventInit eventInitDict)]
+interface TrackEvent : Event
+{
+  readonly attribute (VideoTrack or AudioTrack or TextTrack)? track;
+};
+
+dictionary TrackEventInit : EventInit
+{
+  (VideoTrack or AudioTrack or TextTrack)? track = null;
+};
diff --git a/dom/webidl/TransitionEvent.webidl b/dom/webidl/TransitionEvent.webidl
new file mode 100644
index 000000000..d4476dffa
--- /dev/null
+++ b/dom/webidl/TransitionEvent.webidl
@@ -0,0 +1,25 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Transition events are defined in:
+ * http://www.w3.org/TR/css3-transitions/#transition-events-
+ * http://dev.w3.org/csswg/css3-transitions/#transition-events-
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional TransitionEventInit eventInitDict)]
+interface TransitionEvent : Event {
+  readonly attribute DOMString propertyName;
+  readonly attribute float     elapsedTime;
+  readonly attribute DOMString pseudoElement;
+};
+
+dictionary TransitionEventInit : EventInit {
+  DOMString propertyName = "";
+  float elapsedTime = 0;
+  DOMString pseudoElement = "";
+};
diff --git a/dom/webidl/TreeBoxObject.webidl b/dom/webidl/TreeBoxObject.webidl
new file mode 100644
index 000000000..8ca0a5713
--- /dev/null
+++ b/dom/webidl/TreeBoxObject.webidl
@@ -0,0 +1,207 @@
+
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MozTreeView;
+interface nsIScriptableRegion;
+
+dictionary TreeCellInfo {
+    long row = 0;
+    TreeColumn? col = null;
+    DOMString childElt = "";
+};
+
+[NoInterfaceObject]
+interface TreeBoxObject : BoxObject {
+
+  /**
+   * Obtain the columns.
+   */
+  readonly attribute TreeColumns? columns;
+
+  /**
+   * The view that backs the tree and that supplies it with its data.
+   * It is dynamically settable, either using a view attribute on the
+   * tree tag or by setting this attribute to a new value.
+   */
+  [SetterThrows]
+  attribute MozTreeView? view;
+
+  /**
+   * Whether or not we are currently focused.
+   */
+  attribute boolean focused;
+
+  /**
+   * Obtain the treebody content node
+   */
+  readonly attribute Element? treeBody;
+
+  /**
+   * Obtain the height of a row.
+   */
+  readonly attribute long rowHeight;
+
+  /**
+   * Obtain the width of a row.
+   */
+  readonly attribute long rowWidth;
+
+  /**
+   * Get the pixel position of the horizontal scrollbar.
+   */
+  readonly attribute long horizontalPosition;
+
+  /**
+   * Return the region for the visible parts of the selection, in device pixels
+   */
+  readonly attribute nsIScriptableRegion selectionRegion;
+
+  /**
+   * Get the index of the first visible row.
+   */
+  long getFirstVisibleRow();
+
+  /**
+   * Get the index of the last visible row.
+   */
+  long getLastVisibleRow();
+
+  /**
+   * Gets the number of possible visible rows.
+   */
+  long getPageLength();
+
+  /**
+   * Ensures that a row at a given index is visible.
+   */
+  void ensureRowIsVisible(long index);
+
+  /**
+   * Ensures that a given cell in the tree is visible.
+   */
+  void ensureCellIsVisible(long row, TreeColumn? col);
+
+  /**
+   * Scrolls such that the row at index is at the top of the visible view.
+   */
+  void scrollToRow(long index);
+
+  /**
+   * Scroll the tree up or down by numLines lines. Positive
+   * values move down in the tree. Prevents scrolling off the
+   * end of the tree.
+   */
+  void scrollByLines(long numLines);
+
+  /**
+   * Scroll the tree up or down by numPages pages. A page
+   * is considered to be the amount displayed by the tree.
+   * Positive values move down in the tree. Prevents scrolling
+   * off the end of the tree.
+   */
+  void scrollByPages(long numPages);
+
+  /**
+   * Scrolls such that a given cell is visible (if possible)
+   * at the top left corner of the visible view.
+   */
+  void scrollToCell(long row, TreeColumn? col);
+
+  /**
+   * Scrolls horizontally so that the specified column is
+   * at the left of the view (if possible).
+   */
+  void scrollToColumn(TreeColumn? col);
+
+  /**
+   * Scroll to a specific horizontal pixel position.
+   */
+  void scrollToHorizontalPosition(long horizontalPosition);
+
+  /**
+   * Invalidation methods for fine-grained painting control.
+   */
+  void invalidate();
+  void invalidateColumn(TreeColumn? col);
+  void invalidateRow(long index);
+  void invalidateCell(long row, TreeColumn? col);
+  void invalidateRange(long startIndex, long endIndex);
+  void invalidateColumnRange(long startIndex, long endIndex, TreeColumn? col);
+
+  /**
+   * A hit test that can tell you what row the mouse is over.
+   * returns -1 for invalid mouse coordinates.
+   *
+   * The coordinate system is the client coordinate system for the
+   * document this boxObject lives in, and the units are CSS pixels.
+   */
+  long getRowAt(long x, long y);
+
+  /**
+   * A hit test that can tell you what cell the mouse is over.
+   * TreeCellInfo.row is the row index hit,  returns -1 for invalid mouse
+   * coordinates.  TreeCellInfo.col is the column hit.
+   * TreeCellInfo.childElt is the pseudoelement hit: this can have values of
+   * "cell", "twisty", "image", and "text".
+   *
+   * The coordinate system is the client coordinate system for the
+   * document this boxObject lives in, and the units are CSS pixels.
+   */
+  [Throws]
+  TreeCellInfo getCellAt(long x, long y);
+
+  /**
+   * DEPRECATED: please use above version
+   */
+  [Throws]
+  void getCellAt(long x, long y, object row, object column, object childElt);
+
+  /**
+   * Find the coordinates of an element within a specific cell.
+   */
+  [Throws]
+  DOMRect? getCoordsForCellItem(long row, TreeColumn col, DOMString element);
+
+  /**
+   * DEPRECATED: Please use above version
+   */
+  [Throws]
+  void getCoordsForCellItem(long row, TreeColumn col, DOMString element,
+                            object x, object y, object width, object height);
+
+  /**
+   * Determine if the text of a cell is being cropped or not.
+   */
+  [Throws]
+  boolean isCellCropped(long row, TreeColumn? col);
+
+  /**
+   * The view is responsible for calling these notification methods when
+   * rows are added or removed.  Index is the position at which the new
+   * rows were added or at which rows were removed.  For
+   * non-contiguous additions/removals, this method should be called multiple times.
+   */
+  void rowCountChanged(long index, long count);
+
+  /**
+   * Notify the tree that the view is about to perform a batch
+   * update, that is, add, remove or invalidate several rows at once.
+   * This must be followed by calling endUpdateBatch(), otherwise the tree
+   * will get out of sync.
+   */
+  void beginUpdateBatch();
+
+  /**
+   * Notify the tree that the view has completed a batch update.
+   */
+  void endUpdateBatch();
+
+  /**
+   * Called on a theme switch to flush out the tree's style and image caches.
+   */
+  void clearStyleAndImageCaches();
+};
diff --git a/dom/webidl/TreeColumn.webidl b/dom/webidl/TreeColumn.webidl
new file mode 100644
index 000000000..6d843a078
--- /dev/null
+++ b/dom/webidl/TreeColumn.webidl
@@ -0,0 +1,36 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Func="IsChromeOrXBL"]
+interface TreeColumn {
+  [Throws]
+  readonly attribute Element? element;
+
+  readonly attribute TreeColumns? columns;
+
+  [Throws]
+  readonly attribute long x;
+  [Throws]
+  readonly attribute long width;
+
+  readonly attribute DOMString id;
+  readonly attribute long index;
+
+  readonly attribute boolean primary;
+  readonly attribute boolean cycler;
+  readonly attribute boolean editable;
+  readonly attribute boolean selectable;
+
+  const short TYPE_TEXT                = 1;
+  const short TYPE_CHECKBOX            = 2;
+  const short TYPE_PROGRESSMETER       = 3;
+  const short TYPE_PASSWORD            = 4;
+  readonly attribute short type;
+
+  TreeColumn? getNext();
+  TreeColumn? getPrevious();
+
+  [Throws]
+  void invalidate();
+};
diff --git a/dom/webidl/TreeColumns.webidl b/dom/webidl/TreeColumns.webidl
new file mode 100644
index 000000000..5958d1235
--- /dev/null
+++ b/dom/webidl/TreeColumns.webidl
@@ -0,0 +1,54 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Func="IsChromeOrXBL"]
+interface TreeColumns {
+  /**
+   * The tree widget for these columns.
+   */
+  readonly attribute TreeBoxObject? tree;
+
+  /**
+   * The number of columns.
+   */
+  readonly attribute unsigned long count;
+
+  /**
+   * An alias for count (for the benefit of scripts which treat this as an
+   * array).
+   */
+  readonly attribute unsigned long length;
+
+  /**
+   * Get the first/last column.
+   */
+  TreeColumn? getFirstColumn();
+  TreeColumn? getLastColumn();
+
+  /**
+   * Attribute based column getters.
+   */
+  TreeColumn? getPrimaryColumn();
+  TreeColumn? getSortedColumn();
+  TreeColumn? getKeyColumn();
+
+  /**
+   * Get the column for the given element.
+   */
+  TreeColumn? getColumnFor(Element? element);
+
+  /**
+   * Parametric column getters.
+   */
+  getter TreeColumn? getNamedColumn(DOMString name);
+  getter TreeColumn? getColumnAt(unsigned long index);
+
+  /**
+   * This method is called whenever a treecol is added or removed and
+   * the column cache needs to be rebuilt.
+   */
+  void invalidateColumns();
+
+  void restoreNaturalOrder();
+};
diff --git a/dom/webidl/TreeWalker.webidl b/dom/webidl/TreeWalker.webidl
new file mode 100644
index 000000000..2cd302f00
--- /dev/null
+++ b/dom/webidl/TreeWalker.webidl
@@ -0,0 +1,37 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/2012/WD-dom-20120105/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface TreeWalker {
+  [Constant]
+  readonly attribute Node root;
+  [Constant]
+  readonly attribute unsigned long whatToShow;
+  [Constant]
+  readonly attribute NodeFilter? filter;
+  [Pure, SetterThrows]
+           attribute Node currentNode;
+
+  [Throws]
+  Node? parentNode();
+  [Throws]
+  Node? firstChild();
+  [Throws]
+  Node? lastChild();
+  [Throws]
+  Node? previousSibling();
+  [Throws]
+  Node? nextSibling();
+  [Throws]
+  Node? previousNode();
+  [Throws]
+  Node? nextNode();
+};
diff --git a/dom/webidl/U2F.webidl b/dom/webidl/U2F.webidl
new file mode 100644
index 000000000..3222b0ded
--- /dev/null
+++ b/dom/webidl/U2F.webidl
@@ -0,0 +1,96 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is a combination of the FIDO U2F Raw Message Formats:
+ * https://fidoalliance.org/specs/fido-u2f-v1.0-nfc-bt-amendment-20150514/fido-u2f-raw-message-formats.html
+ * and the U2F JavaScript API v1.1, not yet published. While v1.1 is not published,
+ * v1.0, is located here:
+ * https://fidoalliance.org/specs/fido-u2f-v1.0-nfc-bt-amendment-20150514/fido-u2f-javascript-api.html
+ */
+
+[NoInterfaceObject]
+interface GlobalU2F {
+  [Throws, Pref="security.webauth.u2f"]
+  readonly attribute U2F u2f;
+};
+
+typedef unsigned short ErrorCode;
+typedef sequence<Transport> Transports;
+
+enum Transport {
+    "bt",
+    "ble",
+    "nfc",
+    "usb"
+};
+
+dictionary ClientData {
+    DOMString             typ; // Spelling is from the specification
+    DOMString             challenge;
+    DOMString             origin;
+    // cid_pubkey for Token Binding is not implemented
+};
+
+dictionary RegisterRequest {
+    DOMString version;
+    DOMString challenge;
+};
+
+dictionary RegisterResponse {
+    DOMString version;
+    DOMString registrationData;
+    DOMString clientData;
+
+    // From Error
+    ErrorCode? errorCode;
+    DOMString? errorMessage;
+};
+
+dictionary RegisteredKey {
+    DOMString   version;
+    DOMString   keyHandle;
+    Transports? transports;
+    DOMString?  appId;
+};
+
+dictionary SignResponse {
+    DOMString keyHandle;
+    DOMString signatureData;
+    DOMString clientData;
+
+    // From Error
+    ErrorCode? errorCode;
+    DOMString? errorMessage;
+};
+
+callback U2FRegisterCallback = void(RegisterResponse response);
+callback U2FSignCallback = void(SignResponse response);
+
+[Pref="security.webauth.u2f"]
+interface U2F {
+  // These enumerations are defined in the FIDO U2F Javascript API under the
+  // interface "ErrorCode" as constant integers, and also in the U2F.cpp file.
+  // Any changes to these must occur in both locations.
+  const unsigned short OK = 0;
+  const unsigned short OTHER_ERROR = 1;
+  const unsigned short BAD_REQUEST = 2;
+  const unsigned short CONFIGURATION_UNSUPPORTED = 3;
+  const unsigned short DEVICE_INELIGIBLE = 4;
+  const unsigned short TIMEOUT = 5;
+
+  [Throws]
+  void register (DOMString appId,
+                 sequence<RegisterRequest> registerRequests,
+                 sequence<RegisteredKey> registeredKeys,
+                 U2FRegisterCallback callback,
+                 optional long? opt_timeoutSeconds);
+
+  [Throws]
+  void sign (DOMString appId,
+             DOMString challenge,
+             sequence<RegisteredKey> registeredKeys,
+             U2FSignCallback callback,
+             optional long? opt_timeoutSeconds);
+};
diff --git a/dom/webidl/UDPMessageEvent.webidl b/dom/webidl/UDPMessageEvent.webidl
new file mode 100644
index 000000000..862f719d0
--- /dev/null
+++ b/dom/webidl/UDPMessageEvent.webidl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/raw-sockets/#interface-udpmessageevent
+ */
+
+//Bug 1056444: This interface should be removed after UDPSocket.input/UDPSocket.output are ready.
+[Constructor(DOMString type, optional UDPMessageEventInit eventInitDict),
+ Pref="dom.udpsocket.enabled",
+ ChromeOnly]
+interface UDPMessageEvent : Event {
+    readonly    attribute DOMString      remoteAddress;
+    readonly    attribute unsigned short remotePort;
+    readonly    attribute any            data;
+};
+
+dictionary UDPMessageEventInit : EventInit {
+  DOMString remoteAddress = "";
+  unsigned short remotePort = 0;
+  any data = null;
+};
diff --git a/dom/webidl/UDPSocket.webidl b/dom/webidl/UDPSocket.webidl
new file mode 100644
index 000000000..74cede28c
--- /dev/null
+++ b/dom/webidl/UDPSocket.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/2012/sysapps/tcp-udp-sockets/#interface-udpsocket
+ * http://www.w3.org/2012/sysapps/tcp-udp-sockets/#dictionary-udpoptions
+ */
+
+dictionary UDPOptions {
+    DOMString      localAddress;
+    unsigned short localPort;
+    DOMString      remoteAddress;
+    unsigned short remotePort;
+    boolean        addressReuse = true;
+    boolean        loopback = false;
+};
+
+[Constructor (optional UDPOptions options),
+ Pref="dom.udpsocket.enabled",
+ ChromeOnly]
+interface UDPSocket : EventTarget {
+    readonly    attribute DOMString?       localAddress;
+    readonly    attribute unsigned short?  localPort;
+    readonly    attribute DOMString?       remoteAddress;
+    readonly    attribute unsigned short?  remotePort;
+    readonly    attribute boolean          addressReuse;
+    readonly    attribute boolean          loopback;
+    readonly    attribute SocketReadyState readyState;
+    readonly    attribute Promise<void>    opened;
+    readonly    attribute Promise<void>    closed;
+//    readonly    attribute ReadableStream   input; //Bug 1056444: Stream API is not ready
+//    readonly    attribute WriteableStream  output; //Bug 1056444: Stream API is not ready
+                attribute EventHandler     onmessage; //Bug 1056444: use event interface before Stream API is ready
+    Promise<void> close ();
+    [Throws] void    joinMulticastGroup (DOMString multicastGroupAddress);
+    [Throws] void    leaveMulticastGroup (DOMString multicastGroupAddress);
+    [Throws] boolean send ((DOMString or Blob or ArrayBuffer or ArrayBufferView) data, optional DOMString? remoteAddress, optional unsigned short? remotePort); //Bug 1056444: use send method before Stream API is ready
+};
diff --git a/dom/webidl/UIEvent.webidl b/dom/webidl/UIEvent.webidl
new file mode 100644
index 000000000..5be6a443a
--- /dev/null
+++ b/dom/webidl/UIEvent.webidl
@@ -0,0 +1,64 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional UIEventInit eventInitDict)]
+interface UIEvent : Event
+{
+  readonly attribute WindowProxy? view;
+  readonly attribute long         detail;
+  void initUIEvent(DOMString aType,
+                   optional boolean aCanBubble = false,
+                   optional boolean aCancelable = false,
+                   optional Window? aView = null,
+                   optional long aDetail = 0);
+};
+
+// Additional DOM0 properties.
+partial interface UIEvent {
+  const long SCROLL_PAGE_UP = -32768;
+  const long SCROLL_PAGE_DOWN = 32768;
+
+  readonly attribute long          layerX;
+  readonly attribute long          layerY;
+  readonly attribute long          pageX;
+  readonly attribute long          pageY;
+  readonly attribute unsigned long which;
+  readonly attribute Node?         rangeParent;
+  readonly attribute long          rangeOffset;
+  readonly attribute boolean       isChar;
+};
+
+dictionary UIEventInit : EventInit
+{
+  Window? view = null;
+  long    detail = 0;
+};
+
+// NOTE: Gecko doesn't support commented out modifiers yet.
+dictionary EventModifierInit : UIEventInit
+{
+  boolean ctrlKey = false;
+  boolean shiftKey = false;
+  boolean altKey = false;
+  boolean metaKey = false;
+  boolean modifierAltGraph = false;
+  boolean modifierCapsLock = false;
+  boolean modifierFn = false;
+  boolean modifierFnLock = false;
+  // boolean modifierHyper = false;
+  boolean modifierNumLock = false;
+  boolean modifierOS = false;
+  boolean modifierScrollLock = false;
+  // boolean modifierSuper = false;
+  boolean modifierSymbol = false;
+  boolean modifierSymbolLock = false;
+};
diff --git a/dom/webidl/URL.webidl b/dom/webidl/URL.webidl
new file mode 100644
index 000000000..4d491e1b3
--- /dev/null
+++ b/dom/webidl/URL.webidl
@@ -0,0 +1,75 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origins of this IDL file are
+ * http://url.spec.whatwg.org/#api
+ * http://dev.w3.org/2006/webapi/FileAPI/#creating-revoking
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html#url
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// [Constructor(DOMString url, optional (URL or DOMString) base = "about:blank")]
+[Constructor(DOMString url, URL base),
+ Constructor(DOMString url, optional DOMString base),
+ Exposed=(Window,Worker,WorkerDebugger)]
+interface URL {
+  // Bug 824857: no support for stringifier attributes yet.
+  //  stringifier attribute USVString href;
+
+  // Bug 824857 should remove this.
+  [Throws]
+  stringifier;
+
+  [Throws]
+  attribute USVString href;
+  [Throws]
+  readonly attribute USVString origin;
+  [Throws]
+           attribute USVString protocol;
+  [Throws]
+           attribute USVString username;
+  [Throws]
+           attribute USVString password;
+  [Throws]
+           attribute USVString host;
+  [Throws]
+           attribute USVString hostname;
+  [Throws]
+           attribute USVString port;
+  [Throws]
+           attribute USVString pathname;
+  [Throws]
+           attribute USVString search;
+  [SameObject] readonly attribute URLSearchParams searchParams;
+  [Throws]
+           attribute USVString hash;
+
+  [Throws]
+  USVString toJSON();
+};
+
+partial interface URL {
+  [Throws]
+  static DOMString createObjectURL(Blob blob, optional objectURLOptions options);
+  [Throws]
+  static DOMString createObjectURL(MediaStream stream, optional objectURLOptions options);
+  [Throws]
+  static void revokeObjectURL(DOMString url);
+  [ChromeOnly, Throws]
+  static boolean isValidURL(DOMString url);
+};
+
+dictionary objectURLOptions
+{
+/* boolean autoRevoke = true; */ /* not supported yet */
+};
+
+// https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+partial interface URL {
+  [Throws]
+  static DOMString? createObjectURL(MediaSource source, optional objectURLOptions options);
+};
diff --git a/dom/webidl/URLSearchParams.webidl b/dom/webidl/URLSearchParams.webidl
new file mode 100644
index 000000000..2828d81dd
--- /dev/null
+++ b/dom/webidl/URLSearchParams.webidl
@@ -0,0 +1,31 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://url.spec.whatwg.org/#urlsearchparams
+ *
+ * To the extent possible under law, the editors have waived all copyright
+ * and related or neighboring rights to this work. In addition, as of 17
+ * February 2013, the editors have made this specification available under
+ * the Open Web Foundation Agreement Version 1.0, which is available at
+ * http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0.
+ */
+
+[Constructor(optional (sequence<sequence<USVString>> or record<USVString, USVString> or USVString) init = ""),
+ Exposed=(Window,Worker,WorkerDebugger,System)]
+interface URLSearchParams {
+  void append(USVString name, USVString value);
+  void delete(USVString name);
+  USVString? get(USVString name);
+  sequence<USVString> getAll(USVString name);
+  boolean has(USVString name);
+  void set(USVString name, USVString value);
+
+  [Throws]
+  void sort();
+
+  iterable<USVString, USVString>;
+  stringifier;
+};
diff --git a/dom/webidl/UserProximityEvent.webidl b/dom/webidl/UserProximityEvent.webidl
new file mode 100644
index 000000000..9c10947f7
--- /dev/null
+++ b/dom/webidl/UserProximityEvent.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor(DOMString type, optional UserProximityEventInit eventInitDict)]
+interface UserProximityEvent : Event
+{
+  readonly attribute boolean near;
+};
+
+dictionary UserProximityEventInit : EventInit
+{
+  boolean near = false;
+};
diff --git a/dom/webidl/VTTCue.webidl b/dom/webidl/VTTCue.webidl
new file mode 100644
index 000000000..f74db7a58
--- /dev/null
+++ b/dom/webidl/VTTCue.webidl
@@ -0,0 +1,71 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/html5/webvtt/#the-vttcue-interface
+ */
+
+enum AutoKeyword { "auto" };
+
+enum LineAlignSetting {
+  "start",
+  "center",
+  "end"
+};
+
+enum PositionAlignSetting {
+  "line-left",
+  "center",
+  "line-right",
+  "auto"
+};
+
+enum AlignSetting {
+  "start",
+  "center",
+  "end",
+  "left",
+  "right"
+};
+
+enum DirectionSetting {
+  "",
+  "rl",
+  "lr"
+};
+
+[Constructor(double startTime, double endTime, DOMString text)]
+interface VTTCue : TextTrackCue {
+  [Pref="media.webvtt.regions.enabled"]
+  attribute VTTRegion? region;
+  attribute DirectionSetting vertical;
+  attribute boolean snapToLines;
+  attribute (double or AutoKeyword) line;
+  [SetterThrows]
+  attribute LineAlignSetting lineAlign;
+  [SetterThrows]
+  attribute (double or AutoKeyword) position;
+  [SetterThrows]
+  attribute PositionAlignSetting positionAlign;
+  [SetterThrows]
+  attribute double size;
+  attribute AlignSetting align;
+  attribute DOMString text;
+  DocumentFragment getCueAsHTML();
+};
+
+// Mozilla extensions.
+partial interface VTTCue {
+  [ChromeOnly]
+  attribute HTMLDivElement? displayState;
+  [ChromeOnly]
+  readonly attribute boolean hasBeenReset;
+  [ChromeOnly]
+  readonly attribute double computedLine;
+  [ChromeOnly]
+  readonly attribute double computedPosition;
+  [ChromeOnly]
+  readonly attribute PositionAlignSetting computedPositionAlign;
+};
diff --git a/dom/webidl/VTTRegion.webidl b/dom/webidl/VTTRegion.webidl
new file mode 100644
index 000000000..ec63411eb
--- /dev/null
+++ b/dom/webidl/VTTRegion.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ *  http://dev.w3.org/html5/webvtt/#extension-of-the-texttrack-interface-for-region-support
+ */
+
+[Constructor, Pref="media.webvtt.regions.enabled"]
+interface VTTRegion {
+           [SetterThrows]
+           attribute double width;
+
+           attribute long lines;
+
+           [SetterThrows]
+           attribute double regionAnchorX;
+           [SetterThrows]
+           attribute double regionAnchorY;
+           [SetterThrows]
+           attribute double viewportAnchorX;
+           [SetterThrows]
+           attribute double viewportAnchorY;
+           [SetterThrows]
+           attribute DOMString scroll;
+};
diff --git a/dom/webidl/ValidityState.webidl b/dom/webidl/ValidityState.webidl
new file mode 100644
index 000000000..7e99870e9
--- /dev/null
+++ b/dom/webidl/ValidityState.webidl
@@ -0,0 +1,26 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#validitystate
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
+ * Opera Software ASA. You are granted a license to use, reproduce
+ * and create derivative works of this document.
+ */
+
+interface ValidityState {
+  readonly attribute boolean valueMissing;
+  readonly attribute boolean typeMismatch;
+  readonly attribute boolean patternMismatch;
+  readonly attribute boolean tooLong;
+  readonly attribute boolean tooShort;
+  readonly attribute boolean rangeUnderflow;
+  readonly attribute boolean rangeOverflow;
+  readonly attribute boolean stepMismatch;
+  readonly attribute boolean badInput;
+  readonly attribute boolean customError;
+  readonly attribute boolean valid;
+};
+
diff --git a/dom/webidl/VideoPlaybackQuality.webidl b/dom/webidl/VideoPlaybackQuality.webidl
new file mode 100644
index 000000000..abbe8d19a
--- /dev/null
+++ b/dom/webidl/VideoPlaybackQuality.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Func="mozilla::dom::MediaSource::Enabled"]
+interface VideoPlaybackQuality {
+  readonly attribute DOMHighResTimeStamp creationTime;
+  readonly attribute unsigned long totalVideoFrames;
+  readonly attribute unsigned long droppedVideoFrames;
+  readonly attribute unsigned long corruptedVideoFrames;
+// At Risk: readonly attribute double totalFrameDelay;
+};
+
diff --git a/dom/webidl/VideoStreamTrack.webidl b/dom/webidl/VideoStreamTrack.webidl
new file mode 100644
index 000000000..b194d5c9f
--- /dev/null
+++ b/dom/webidl/VideoStreamTrack.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// [Constructor(optional MediaTrackConstraints videoConstraints)]
+interface VideoStreamTrack : MediaStreamTrack {
+//    static sequence<DOMString> getSourceIds ();
+//    void                       takePhoto ();
+//                attribute EventHandler onphoto;
+//                attribute EventHandler onphotoerror;
+};
diff --git a/dom/webidl/VideoTrack.webidl b/dom/webidl/VideoTrack.webidl
new file mode 100644
index 000000000..7f5974f21
--- /dev/null
+++ b/dom/webidl/VideoTrack.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#videotrack
+ */
+
+[Pref="media.track.enabled"]
+interface VideoTrack {
+  readonly attribute DOMString id;
+  readonly attribute DOMString kind;
+  readonly attribute DOMString label;
+  readonly attribute DOMString language;
+           attribute boolean selected;
+};
diff --git a/dom/webidl/VideoTrackList.webidl b/dom/webidl/VideoTrackList.webidl
new file mode 100644
index 000000000..144120226
--- /dev/null
+++ b/dom/webidl/VideoTrackList.webidl
@@ -0,0 +1,21 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/#videotracklist
+ */
+
+[Pref="media.track.enabled"]
+interface VideoTrackList : EventTarget {
+  readonly attribute unsigned long length;
+  getter VideoTrack (unsigned long index);
+  VideoTrack? getTrackById(DOMString id);
+  readonly attribute long selectedIndex;
+
+           attribute EventHandler onchange;
+           attribute EventHandler onaddtrack;
+           attribute EventHandler onremovetrack;
+};
+
diff --git a/dom/webidl/WaveShaperNode.webidl b/dom/webidl/WaveShaperNode.webidl
new file mode 100644
index 000000000..ac30c94dc
--- /dev/null
+++ b/dom/webidl/WaveShaperNode.webidl
@@ -0,0 +1,30 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+enum OverSampleType {
+  "none",
+  "2x",
+  "4x"
+};
+
+[Pref="dom.webaudio.enabled"]
+interface WaveShaperNode : AudioNode {
+
+      [SetterThrows]
+      attribute Float32Array? curve;
+      attribute OverSampleType oversample;
+
+};
+
+// Mozilla extension
+WaveShaperNode implements AudioNodePassThrough;
+
diff --git a/dom/webidl/WebComponents.webidl b/dom/webidl/WebComponents.webidl
new file mode 100644
index 000000000..9c5e53131
--- /dev/null
+++ b/dom/webidl/WebComponents.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+callback LifecycleConnectedCallback = void();
+callback LifecycleDisconnectedCallback = void();
+callback LifecycleAdoptedCallback = void(Document? oldDocument,
+                                         Document? newDocment);
+callback LifecycleAttributeChangedCallback = void(DOMString attrName,
+                                                  DOMString? oldValue,
+                                                  DOMString? newValue,
+                                                  DOMString? namespaceURI);
+
+dictionary LifecycleCallbacks {
+  LifecycleConnectedCallback? connectedCallback;
+  LifecycleDisconnectedCallback? disconnectedCallback;
+  LifecycleAdoptedCallback? adoptedCallback;
+  LifecycleAttributeChangedCallback? attributeChangedCallback;
+};
diff --git a/dom/webidl/WebGL2RenderingContext.webidl b/dom/webidl/WebGL2RenderingContext.webidl
new file mode 100644
index 000000000..34c71a65d
--- /dev/null
+++ b/dom/webidl/WebGL2RenderingContext.webidl
@@ -0,0 +1,701 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The source for this IDL is found at https://www.khronos.org/registry/webgl/specs/latest/2.0
+ * This IDL depends on WebGLRenderingContext.webidl
+ */
+
+typedef long long GLint64;
+typedef unsigned long long GLuint64;
+
+[Pref="webgl.enable-webgl2"]
+interface WebGLSampler {
+};
+
+[Pref="webgl.enable-webgl2"]
+interface WebGLSync {
+};
+
+[Pref="webgl.enable-webgl2"]
+interface WebGLTransformFeedback {
+};
+
+typedef (Uint32Array or sequence<GLuint>) Uint32List;
+
+// WebGL2 spec has this as an empty interface that pulls in everything
+// via WebGL2RenderingContextBase.
+[Pref="webgl.enable-webgl2"]
+interface WebGL2RenderingContext
+{
+};
+
+[NoInterfaceObject]
+interface WebGL2RenderingContextBase
+{
+    const GLenum READ_BUFFER                                   = 0x0C02;
+    const GLenum UNPACK_ROW_LENGTH                             = 0x0CF2;
+    const GLenum UNPACK_SKIP_ROWS                              = 0x0CF3;
+    const GLenum UNPACK_SKIP_PIXELS                            = 0x0CF4;
+    const GLenum PACK_ROW_LENGTH                               = 0x0D02;
+    const GLenum PACK_SKIP_ROWS                                = 0x0D03;
+    const GLenum PACK_SKIP_PIXELS                              = 0x0D04;
+    const GLenum COLOR                                         = 0x1800;
+    const GLenum DEPTH                                         = 0x1801;
+    const GLenum STENCIL                                       = 0x1802;
+    const GLenum RED                                           = 0x1903;
+    const GLenum RGB8                                          = 0x8051;
+    const GLenum RGBA8                                         = 0x8058;
+    const GLenum RGB10_A2                                      = 0x8059;
+    const GLenum TEXTURE_BINDING_3D                            = 0x806A;
+    const GLenum UNPACK_SKIP_IMAGES                            = 0x806D;
+    const GLenum UNPACK_IMAGE_HEIGHT                           = 0x806E;
+    const GLenum TEXTURE_3D                                    = 0x806F;
+    const GLenum TEXTURE_WRAP_R                                = 0x8072;
+    const GLenum MAX_3D_TEXTURE_SIZE                           = 0x8073;
+    const GLenum UNSIGNED_INT_2_10_10_10_REV                   = 0x8368;
+    const GLenum MAX_ELEMENTS_VERTICES                         = 0x80E8;
+    const GLenum MAX_ELEMENTS_INDICES                          = 0x80E9;
+    const GLenum TEXTURE_MIN_LOD                               = 0x813A;
+    const GLenum TEXTURE_MAX_LOD                               = 0x813B;
+    const GLenum TEXTURE_BASE_LEVEL                            = 0x813C;
+    const GLenum TEXTURE_MAX_LEVEL                             = 0x813D;
+    const GLenum MIN                                           = 0x8007;
+    const GLenum MAX                                           = 0x8008;
+    const GLenum DEPTH_COMPONENT24                             = 0x81A6;
+    const GLenum MAX_TEXTURE_LOD_BIAS                          = 0x84FD;
+    const GLenum TEXTURE_COMPARE_MODE                          = 0x884C;
+    const GLenum TEXTURE_COMPARE_FUNC                          = 0x884D;
+    const GLenum CURRENT_QUERY                                 = 0x8865;
+    const GLenum QUERY_RESULT                                  = 0x8866;
+    const GLenum QUERY_RESULT_AVAILABLE                        = 0x8867;
+    const GLenum STREAM_READ                                   = 0x88E1;
+    const GLenum STREAM_COPY                                   = 0x88E2;
+    const GLenum STATIC_READ                                   = 0x88E5;
+    const GLenum STATIC_COPY                                   = 0x88E6;
+    const GLenum DYNAMIC_READ                                  = 0x88E9;
+    const GLenum DYNAMIC_COPY                                  = 0x88EA;
+    const GLenum MAX_DRAW_BUFFERS                              = 0x8824;
+    const GLenum DRAW_BUFFER0                                  = 0x8825;
+    const GLenum DRAW_BUFFER1                                  = 0x8826;
+    const GLenum DRAW_BUFFER2                                  = 0x8827;
+    const GLenum DRAW_BUFFER3                                  = 0x8828;
+    const GLenum DRAW_BUFFER4                                  = 0x8829;
+    const GLenum DRAW_BUFFER5                                  = 0x882A;
+    const GLenum DRAW_BUFFER6                                  = 0x882B;
+    const GLenum DRAW_BUFFER7                                  = 0x882C;
+    const GLenum DRAW_BUFFER8                                  = 0x882D;
+    const GLenum DRAW_BUFFER9                                  = 0x882E;
+    const GLenum DRAW_BUFFER10                                 = 0x882F;
+    const GLenum DRAW_BUFFER11                                 = 0x8830;
+    const GLenum DRAW_BUFFER12                                 = 0x8831;
+    const GLenum DRAW_BUFFER13                                 = 0x8832;
+    const GLenum DRAW_BUFFER14                                 = 0x8833;
+    const GLenum DRAW_BUFFER15                                 = 0x8834;
+    const GLenum MAX_FRAGMENT_UNIFORM_COMPONENTS               = 0x8B49;
+    const GLenum MAX_VERTEX_UNIFORM_COMPONENTS                 = 0x8B4A;
+    const GLenum SAMPLER_3D                                    = 0x8B5F;
+    const GLenum SAMPLER_2D_SHADOW                             = 0x8B62;
+    const GLenum FRAGMENT_SHADER_DERIVATIVE_HINT               = 0x8B8B;
+    const GLenum PIXEL_PACK_BUFFER                             = 0x88EB;
+    const GLenum PIXEL_UNPACK_BUFFER                           = 0x88EC;
+    const GLenum PIXEL_PACK_BUFFER_BINDING                     = 0x88ED;
+    const GLenum PIXEL_UNPACK_BUFFER_BINDING                   = 0x88EF;
+    const GLenum FLOAT_MAT2x3                                  = 0x8B65;
+    const GLenum FLOAT_MAT2x4                                  = 0x8B66;
+    const GLenum FLOAT_MAT3x2                                  = 0x8B67;
+    const GLenum FLOAT_MAT3x4                                  = 0x8B68;
+    const GLenum FLOAT_MAT4x2                                  = 0x8B69;
+    const GLenum FLOAT_MAT4x3                                  = 0x8B6A;
+    const GLenum SRGB                                          = 0x8C40;
+    const GLenum SRGB8                                         = 0x8C41;
+    const GLenum SRGB8_ALPHA8                                  = 0x8C43;
+    const GLenum COMPARE_REF_TO_TEXTURE                        = 0x884E;
+    const GLenum RGBA32F                                       = 0x8814;
+    const GLenum RGB32F                                        = 0x8815;
+    const GLenum RGBA16F                                       = 0x881A;
+    const GLenum RGB16F                                        = 0x881B;
+    const GLenum VERTEX_ATTRIB_ARRAY_INTEGER                   = 0x88FD;
+    const GLenum MAX_ARRAY_TEXTURE_LAYERS                      = 0x88FF;
+    const GLenum MIN_PROGRAM_TEXEL_OFFSET                      = 0x8904;
+    const GLenum MAX_PROGRAM_TEXEL_OFFSET                      = 0x8905;
+    const GLenum MAX_VARYING_COMPONENTS                        = 0x8B4B;
+    const GLenum TEXTURE_2D_ARRAY                              = 0x8C1A;
+    const GLenum TEXTURE_BINDING_2D_ARRAY                      = 0x8C1D;
+    const GLenum R11F_G11F_B10F                                = 0x8C3A;
+    const GLenum UNSIGNED_INT_10F_11F_11F_REV                  = 0x8C3B;
+    const GLenum RGB9_E5                                       = 0x8C3D;
+    const GLenum UNSIGNED_INT_5_9_9_9_REV                      = 0x8C3E;
+    const GLenum TRANSFORM_FEEDBACK_BUFFER_MODE                = 0x8C7F;
+    const GLenum MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS    = 0x8C80;
+    const GLenum TRANSFORM_FEEDBACK_VARYINGS                   = 0x8C83;
+    const GLenum TRANSFORM_FEEDBACK_BUFFER_START               = 0x8C84;
+    const GLenum TRANSFORM_FEEDBACK_BUFFER_SIZE                = 0x8C85;
+    const GLenum TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN         = 0x8C88;
+    const GLenum RASTERIZER_DISCARD                            = 0x8C89;
+    const GLenum MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS = 0x8C8A;
+    const GLenum MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS       = 0x8C8B;
+    const GLenum INTERLEAVED_ATTRIBS                           = 0x8C8C;
+    const GLenum SEPARATE_ATTRIBS                              = 0x8C8D;
+    const GLenum TRANSFORM_FEEDBACK_BUFFER                     = 0x8C8E;
+    const GLenum TRANSFORM_FEEDBACK_BUFFER_BINDING             = 0x8C8F;
+    const GLenum RGBA32UI                                      = 0x8D70;
+    const GLenum RGB32UI                                       = 0x8D71;
+    const GLenum RGBA16UI                                      = 0x8D76;
+    const GLenum RGB16UI                                       = 0x8D77;
+    const GLenum RGBA8UI                                       = 0x8D7C;
+    const GLenum RGB8UI                                        = 0x8D7D;
+    const GLenum RGBA32I                                       = 0x8D82;
+    const GLenum RGB32I                                        = 0x8D83;
+    const GLenum RGBA16I                                       = 0x8D88;
+    const GLenum RGB16I                                        = 0x8D89;
+    const GLenum RGBA8I                                        = 0x8D8E;
+    const GLenum RGB8I                                         = 0x8D8F;
+    const GLenum RED_INTEGER                                   = 0x8D94;
+    const GLenum RGB_INTEGER                                   = 0x8D98;
+    const GLenum RGBA_INTEGER                                  = 0x8D99;
+    const GLenum SAMPLER_2D_ARRAY                              = 0x8DC1;
+    const GLenum SAMPLER_2D_ARRAY_SHADOW                       = 0x8DC4;
+    const GLenum SAMPLER_CUBE_SHADOW                           = 0x8DC5;
+    const GLenum UNSIGNED_INT_VEC2                             = 0x8DC6;
+    const GLenum UNSIGNED_INT_VEC3                             = 0x8DC7;
+    const GLenum UNSIGNED_INT_VEC4                             = 0x8DC8;
+    const GLenum INT_SAMPLER_2D                                = 0x8DCA;
+    const GLenum INT_SAMPLER_3D                                = 0x8DCB;
+    const GLenum INT_SAMPLER_CUBE                              = 0x8DCC;
+    const GLenum INT_SAMPLER_2D_ARRAY                          = 0x8DCF;
+    const GLenum UNSIGNED_INT_SAMPLER_2D                       = 0x8DD2;
+    const GLenum UNSIGNED_INT_SAMPLER_3D                       = 0x8DD3;
+    const GLenum UNSIGNED_INT_SAMPLER_CUBE                     = 0x8DD4;
+    const GLenum UNSIGNED_INT_SAMPLER_2D_ARRAY                 = 0x8DD7;
+    const GLenum DEPTH_COMPONENT32F                            = 0x8CAC;
+    const GLenum DEPTH32F_STENCIL8                             = 0x8CAD;
+    const GLenum FLOAT_32_UNSIGNED_INT_24_8_REV                = 0x8DAD;
+    const GLenum FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING         = 0x8210;
+    const GLenum FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE         = 0x8211;
+    const GLenum FRAMEBUFFER_ATTACHMENT_RED_SIZE               = 0x8212;
+    const GLenum FRAMEBUFFER_ATTACHMENT_GREEN_SIZE             = 0x8213;
+    const GLenum FRAMEBUFFER_ATTACHMENT_BLUE_SIZE              = 0x8214;
+    const GLenum FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE             = 0x8215;
+    const GLenum FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE             = 0x8216;
+    const GLenum FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE           = 0x8217;
+    const GLenum FRAMEBUFFER_DEFAULT                           = 0x8218;
+    const GLenum UNSIGNED_INT_24_8                             = 0x84FA;
+    const GLenum DEPTH24_STENCIL8                              = 0x88F0;
+    const GLenum UNSIGNED_NORMALIZED                           = 0x8C17;
+    const GLenum DRAW_FRAMEBUFFER_BINDING                      = 0x8CA6; /* Same as FRAMEBUFFER_BINDING */
+    const GLenum READ_FRAMEBUFFER                              = 0x8CA8;
+    const GLenum DRAW_FRAMEBUFFER                              = 0x8CA9;
+    const GLenum READ_FRAMEBUFFER_BINDING                      = 0x8CAA;
+    const GLenum RENDERBUFFER_SAMPLES                          = 0x8CAB;
+    const GLenum FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER          = 0x8CD4;
+    const GLenum MAX_COLOR_ATTACHMENTS                         = 0x8CDF;
+    const GLenum COLOR_ATTACHMENT1                             = 0x8CE1;
+    const GLenum COLOR_ATTACHMENT2                             = 0x8CE2;
+    const GLenum COLOR_ATTACHMENT3                             = 0x8CE3;
+    const GLenum COLOR_ATTACHMENT4                             = 0x8CE4;
+    const GLenum COLOR_ATTACHMENT5                             = 0x8CE5;
+    const GLenum COLOR_ATTACHMENT6                             = 0x8CE6;
+    const GLenum COLOR_ATTACHMENT7                             = 0x8CE7;
+    const GLenum COLOR_ATTACHMENT8                             = 0x8CE8;
+    const GLenum COLOR_ATTACHMENT9                             = 0x8CE9;
+    const GLenum COLOR_ATTACHMENT10                            = 0x8CEA;
+    const GLenum COLOR_ATTACHMENT11                            = 0x8CEB;
+    const GLenum COLOR_ATTACHMENT12                            = 0x8CEC;
+    const GLenum COLOR_ATTACHMENT13                            = 0x8CED;
+    const GLenum COLOR_ATTACHMENT14                            = 0x8CEE;
+    const GLenum COLOR_ATTACHMENT15                            = 0x8CEF;
+    const GLenum FRAMEBUFFER_INCOMPLETE_MULTISAMPLE            = 0x8D56;
+    const GLenum MAX_SAMPLES                                   = 0x8D57;
+    const GLenum HALF_FLOAT                                    = 0x140B;
+    const GLenum RG                                            = 0x8227;
+    const GLenum RG_INTEGER                                    = 0x8228;
+    const GLenum R8                                            = 0x8229;
+    const GLenum RG8                                           = 0x822B;
+    const GLenum R16F                                          = 0x822D;
+    const GLenum R32F                                          = 0x822E;
+    const GLenum RG16F                                         = 0x822F;
+    const GLenum RG32F                                         = 0x8230;
+    const GLenum R8I                                           = 0x8231;
+    const GLenum R8UI                                          = 0x8232;
+    const GLenum R16I                                          = 0x8233;
+    const GLenum R16UI                                         = 0x8234;
+    const GLenum R32I                                          = 0x8235;
+    const GLenum R32UI                                         = 0x8236;
+    const GLenum RG8I                                          = 0x8237;
+    const GLenum RG8UI                                         = 0x8238;
+    const GLenum RG16I                                         = 0x8239;
+    const GLenum RG16UI                                        = 0x823A;
+    const GLenum RG32I                                         = 0x823B;
+    const GLenum RG32UI                                        = 0x823C;
+    const GLenum VERTEX_ARRAY_BINDING                          = 0x85B5;
+    const GLenum R8_SNORM                                      = 0x8F94;
+    const GLenum RG8_SNORM                                     = 0x8F95;
+    const GLenum RGB8_SNORM                                    = 0x8F96;
+    const GLenum RGBA8_SNORM                                   = 0x8F97;
+    const GLenum SIGNED_NORMALIZED                             = 0x8F9C;
+    const GLenum COPY_READ_BUFFER                              = 0x8F36;
+    const GLenum COPY_WRITE_BUFFER                             = 0x8F37;
+    const GLenum COPY_READ_BUFFER_BINDING                      = 0x8F36; /* Same as COPY_READ_BUFFER */
+    const GLenum COPY_WRITE_BUFFER_BINDING                     = 0x8F37; /* Same as COPY_WRITE_BUFFER */
+    const GLenum UNIFORM_BUFFER                                = 0x8A11;
+    const GLenum UNIFORM_BUFFER_BINDING                        = 0x8A28;
+    const GLenum UNIFORM_BUFFER_START                          = 0x8A29;
+    const GLenum UNIFORM_BUFFER_SIZE                           = 0x8A2A;
+    const GLenum MAX_VERTEX_UNIFORM_BLOCKS                     = 0x8A2B;
+    const GLenum MAX_FRAGMENT_UNIFORM_BLOCKS                   = 0x8A2D;
+    const GLenum MAX_COMBINED_UNIFORM_BLOCKS                   = 0x8A2E;
+    const GLenum MAX_UNIFORM_BUFFER_BINDINGS                   = 0x8A2F;
+    const GLenum MAX_UNIFORM_BLOCK_SIZE                        = 0x8A30;
+    const GLenum MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS        = 0x8A31;
+    const GLenum MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS      = 0x8A33;
+    const GLenum UNIFORM_BUFFER_OFFSET_ALIGNMENT               = 0x8A34;
+    const GLenum ACTIVE_UNIFORM_BLOCKS                         = 0x8A36;
+    const GLenum UNIFORM_TYPE                                  = 0x8A37;
+    const GLenum UNIFORM_SIZE                                  = 0x8A38;
+    const GLenum UNIFORM_BLOCK_INDEX                           = 0x8A3A;
+    const GLenum UNIFORM_OFFSET                                = 0x8A3B;
+    const GLenum UNIFORM_ARRAY_STRIDE                          = 0x8A3C;
+    const GLenum UNIFORM_MATRIX_STRIDE                         = 0x8A3D;
+    const GLenum UNIFORM_IS_ROW_MAJOR                          = 0x8A3E;
+    const GLenum UNIFORM_BLOCK_BINDING                         = 0x8A3F;
+    const GLenum UNIFORM_BLOCK_DATA_SIZE                       = 0x8A40;
+    const GLenum UNIFORM_BLOCK_ACTIVE_UNIFORMS                 = 0x8A42;
+    const GLenum UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES          = 0x8A43;
+    const GLenum UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER     = 0x8A44;
+    const GLenum UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER   = 0x8A46;
+    const GLenum INVALID_INDEX                                 = 0xFFFFFFFF;
+    const GLenum MAX_VERTEX_OUTPUT_COMPONENTS                  = 0x9122;
+    const GLenum MAX_FRAGMENT_INPUT_COMPONENTS                 = 0x9125;
+    const GLenum MAX_SERVER_WAIT_TIMEOUT                       = 0x9111;
+    const GLenum OBJECT_TYPE                                   = 0x9112;
+    const GLenum SYNC_CONDITION                                = 0x9113;
+    const GLenum SYNC_STATUS                                   = 0x9114;
+    const GLenum SYNC_FLAGS                                    = 0x9115;
+    const GLenum SYNC_FENCE                                    = 0x9116;
+    const GLenum SYNC_GPU_COMMANDS_COMPLETE                    = 0x9117;
+    const GLenum UNSIGNALED                                    = 0x9118;
+    const GLenum SIGNALED                                      = 0x9119;
+    const GLenum ALREADY_SIGNALED                              = 0x911A;
+    const GLenum TIMEOUT_EXPIRED                               = 0x911B;
+    const GLenum CONDITION_SATISFIED                           = 0x911C;
+    const GLenum WAIT_FAILED                                   = 0x911D;
+    const GLenum SYNC_FLUSH_COMMANDS_BIT                       = 0x00000001;
+    const GLenum VERTEX_ATTRIB_ARRAY_DIVISOR                   = 0x88FE;
+    const GLenum ANY_SAMPLES_PASSED                            = 0x8C2F;
+    const GLenum ANY_SAMPLES_PASSED_CONSERVATIVE               = 0x8D6A;
+    const GLenum SAMPLER_BINDING                               = 0x8919;
+    const GLenum RGB10_A2UI                                    = 0x906F;
+    const GLenum INT_2_10_10_10_REV                            = 0x8D9F;
+    const GLenum TRANSFORM_FEEDBACK                            = 0x8E22;
+    const GLenum TRANSFORM_FEEDBACK_PAUSED                     = 0x8E23;
+    const GLenum TRANSFORM_FEEDBACK_ACTIVE                     = 0x8E24;
+    const GLenum TRANSFORM_FEEDBACK_BINDING                    = 0x8E25;
+    const GLenum TEXTURE_IMMUTABLE_FORMAT                      = 0x912F;
+    const GLenum MAX_ELEMENT_INDEX                             = 0x8D6B;
+    const GLenum TEXTURE_IMMUTABLE_LEVELS                      = 0x82DF;
+
+    const GLint64 TIMEOUT_IGNORED                              = -1;
+
+    /* WebGL-specific enums */
+    const GLenum MAX_CLIENT_WAIT_TIMEOUT_WEBGL                 = 0x9247;
+
+    /* Buffer objects */
+    // WebGL1:
+    void bufferData(GLenum target, GLsizeiptr size, GLenum usage);
+    void bufferData(GLenum target, ArrayBuffer? srcData, GLenum usage);
+    void bufferData(GLenum target, ArrayBufferView srcData, GLenum usage);
+    void bufferSubData(GLenum target, GLintptr offset, ArrayBuffer srcData);
+    void bufferSubData(GLenum target, GLintptr offset, ArrayBufferView srcData);
+    // WebGL2:
+    void bufferData(GLenum target, ArrayBufferView srcData, GLenum usage,
+                    GLuint srcOffset, optional GLuint length = 0);
+    void bufferSubData(GLenum target, GLintptr dstByteOffset, ArrayBufferView srcData,
+                       GLuint srcOffset, optional GLuint length = 0);
+
+    void copyBufferSubData(GLenum readTarget, GLenum writeTarget, GLintptr readOffset,
+                           GLintptr writeOffset, GLsizeiptr size);
+    // MapBufferRange, in particular its read-only and write-only modes,
+    // can not be exposed safely to JavaScript. GetBufferSubData
+    // replaces it for the purpose of fetching data back from the GPU.
+    void getBufferSubData(GLenum target, GLintptr srcByteOffset, ArrayBufferView dstData,
+                          optional GLuint dstOffset = 0, optional GLuint length = 0);
+
+    /* Framebuffer objects */
+    void blitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0,
+                         GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
+    void framebufferTextureLayer(GLenum target, GLenum attachment, WebGLTexture? texture, GLint level,
+                                 GLint layer);
+
+    [Throws]
+    void invalidateFramebuffer(GLenum target, sequence<GLenum> attachments);
+
+    [Throws]
+    void invalidateSubFramebuffer(GLenum target, sequence<GLenum> attachments,
+                                  GLint x, GLint y, GLsizei width, GLsizei height);
+
+    void readBuffer(GLenum src);
+
+    /* Renderbuffer objects */
+    [Throws]
+    any getInternalformatParameter(GLenum target, GLenum internalformat, GLenum pname);
+    void renderbufferStorageMultisample(GLenum target, GLsizei samples, GLenum internalformat,
+                                        GLsizei width, GLsizei height);
+
+    /* Texture objects */
+    void texStorage2D(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width,
+                      GLsizei height);
+    void texStorage3D(GLenum target, GLsizei levels, GLenum internalformat, GLsizei width,
+                      GLsizei height, GLsizei depth);
+
+    // WebGL1 legacy entrypoints:
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLsizei width, GLsizei height, GLint border, GLenum format,
+                    GLenum type, ArrayBufferView? pixels);
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, ImageData source);
+
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLsizei width, GLsizei height,
+                       GLenum format, GLenum type, ArrayBufferView? pixels);
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, ImageData source);
+
+    // WebGL2 entrypoints:
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type, GLintptr pboOffset);
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type,
+                    HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type,
+                    HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type,
+                    HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type,
+                    ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type,
+                    ImageData source);
+    [Throws] // Another overhead throws.
+    void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLint border, GLenum format, GLenum type, ArrayBufferView srcData,
+                    GLuint srcOffset);
+
+    [Throws] // Another overhead throws.
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type, GLintptr pboOffset);
+    [Throws]
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type,
+                    HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type,
+                    HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type,
+                    HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type,
+                    ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type,
+                    ImageData source);
+    [Throws] // Another overhead throws.
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type, ArrayBufferView? srcData);
+    [Throws] // Another overhead throws.
+    void texImage3D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                    GLsizei depth, GLint border, GLenum format, GLenum type, ArrayBufferView srcData,
+                    GLuint srcOffset);
+
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type, GLintptr pboOffset);
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type,
+                       HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type,
+                       HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type,
+                       HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type,
+                       ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type,
+                       ImageData source);
+    [Throws] // Another overhead throws.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
+                       GLsizei height, GLenum format, GLenum type, ArrayBufferView srcData,
+                       GLuint srcOffset);
+
+    [Throws] // Another overhead throws.
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       GLintptr pboOffset);
+    [Throws]
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       HTMLCanvasElement source); // May throw DOMException
+    [Throws]
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       HTMLImageElement source); // May throw DOMException
+    [Throws]
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       HTMLVideoElement source); // May throw DOMException
+    [Throws] // Another overhead throws.
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       ImageBitmap source);
+    [Throws] // Another overhead throws.
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       ImageData source);
+    [Throws] // Another overhead throws.
+    void texSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                       GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type,
+                       ArrayBufferView? srcData, optional GLuint srcOffset = 0);
+
+    void copyTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset,
+                           GLint x, GLint y, GLsizei width, GLsizei height);
+
+    void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat, GLsizei width,
+                              GLsizei height, GLint border, GLintptr offset);
+    void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat, GLsizei width,
+                              GLsizei height, GLint border, ArrayBufferView srcData,
+                              optional GLuint srcOffset = 0, optional GLuint srcLengthOverride = 0);
+
+    void compressedTexImage3D(GLenum target, GLint level, GLenum internalformat, GLsizei width,
+                              GLsizei height, GLsizei depth, GLint border, GLintptr offset);
+    void compressedTexImage3D(GLenum target, GLint level, GLenum internalformat, GLsizei width,
+                              GLsizei height, GLsizei depth, GLint border, ArrayBufferView srcData,
+                              optional GLuint srcOffset = 0, optional GLuint srcLengthOverride = 0);
+
+    void compressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                                 GLsizei width, GLsizei height, GLenum format, GLintptr offset);
+    void compressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                                 GLsizei width, GLsizei height, GLenum format,
+                                 ArrayBufferView srcData,
+                                 optional GLuint srcOffset = 0,
+                                 optional GLuint srcLengthOverride = 0);
+
+    void compressedTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                                 GLint zoffset, GLsizei width, GLsizei height, GLsizei depth,
+                                 GLenum format, GLintptr offset);
+    void compressedTexSubImage3D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                                 GLint zoffset, GLsizei width, GLsizei height, GLsizei depth,
+                                 GLenum format, ArrayBufferView srcData,
+                                 optional GLuint srcOffset = 0,
+                                 optional GLuint srcLengthOverride = 0);
+
+    /* Programs and shaders */
+    [WebGLHandlesContextLoss] GLint getFragDataLocation(WebGLProgram program, DOMString name);
+
+    /* Uniforms */
+    void uniform1ui(WebGLUniformLocation? location, GLuint v0);
+    void uniform2ui(WebGLUniformLocation? location, GLuint v0, GLuint v1);
+    void uniform3ui(WebGLUniformLocation? location, GLuint v0, GLuint v1, GLuint v2);
+    void uniform4ui(WebGLUniformLocation? location, GLuint v0, GLuint v1, GLuint v2, GLuint v3);
+
+    void uniform1fv(WebGLUniformLocation? location, Float32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform2fv(WebGLUniformLocation? location, Float32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform3fv(WebGLUniformLocation? location, Float32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform4fv(WebGLUniformLocation? location, Float32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+
+    void uniform1iv(WebGLUniformLocation? location, Int32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform2iv(WebGLUniformLocation? location, Int32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform3iv(WebGLUniformLocation? location, Int32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform4iv(WebGLUniformLocation? location, Int32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+
+    void uniform1uiv(WebGLUniformLocation? location, Uint32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform2uiv(WebGLUniformLocation? location, Uint32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform3uiv(WebGLUniformLocation? location, Uint32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+    void uniform4uiv(WebGLUniformLocation? location, Uint32List data, optional GLuint srcOffset = 0,
+                    optional GLuint srcLength = 0);
+
+    void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                          optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x2fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+
+    void uniformMatrix2x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                          optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4x3fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+
+    void uniformMatrix2x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix3x4fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                            optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+    void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data,
+                          optional GLuint srcOffset = 0, optional GLuint srcLength = 0);
+
+    /* Vertex attribs */
+    void vertexAttribI4i(GLuint index, GLint x, GLint y, GLint z, GLint w);
+    void vertexAttribI4iv(GLuint index, Int32List values);
+    void vertexAttribI4ui(GLuint index, GLuint x, GLuint y, GLuint z, GLuint w);
+    void vertexAttribI4uiv(GLuint index, Uint32List values);
+    void vertexAttribIPointer(GLuint index, GLint size, GLenum type, GLsizei stride, GLintptr offset);
+
+    /* Writing to the drawing buffer */
+    void vertexAttribDivisor(GLuint index, GLuint divisor);
+    void drawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei instanceCount);
+    void drawElementsInstanced(GLenum mode, GLsizei count, GLenum type, GLintptr offset, GLsizei instanceCount);
+    void drawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, GLintptr offset);
+
+    /* Reading back pixels */
+    // WebGL1:
+    [Throws] // Throws on readback in a write-only context.
+    void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type,
+                    ArrayBufferView? dstData);
+    // WebGL2:
+    [Throws] // Throws on readback in a write-only context.
+    void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type,
+                    GLintptr offset);
+    [Throws] // Throws on readback in a write-only context.
+    void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type,
+                    ArrayBufferView dstData, GLuint dstOffset);
+
+    /* Multiple Render Targets */
+    void drawBuffers(sequence<GLenum> buffers);
+
+    void clearBufferfv(GLenum buffer, GLint drawbuffer, Float32List values,
+                       optional GLuint srcOffset = 0);
+    void clearBufferiv(GLenum buffer, GLint drawbuffer, Int32List values,
+                       optional GLuint srcOffset = 0);
+    void clearBufferuiv(GLenum buffer, GLint drawbuffer, Uint32List values,
+                        optional GLuint srcOffset = 0);
+
+    void clearBufferfi(GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil);
+
+    /* Query Objects */
+    WebGLQuery? createQuery();
+    void deleteQuery(WebGLQuery? query);
+    [WebGLHandlesContextLoss] GLboolean isQuery(WebGLQuery? query);
+    void beginQuery(GLenum target, WebGLQuery query);
+    void endQuery(GLenum target);
+    any getQuery(GLenum target, GLenum pname);
+    any getQueryParameter(WebGLQuery query, GLenum pname);
+
+    /* Sampler Objects */
+    WebGLSampler? createSampler();
+    void deleteSampler(WebGLSampler? sampler);
+    [WebGLHandlesContextLoss] GLboolean isSampler(WebGLSampler? sampler);
+    void bindSampler(GLuint unit, WebGLSampler? sampler);
+    void samplerParameteri(WebGLSampler sampler, GLenum pname, GLint param);
+    void samplerParameterf(WebGLSampler sampler, GLenum pname, GLfloat param);
+    any getSamplerParameter(WebGLSampler sampler, GLenum pname);
+
+    /* Sync objects */
+    WebGLSync? fenceSync(GLenum condition, GLbitfield flags);
+    [WebGLHandlesContextLoss] GLboolean isSync(WebGLSync? sync);
+    void deleteSync(WebGLSync? sync);
+    GLenum clientWaitSync(WebGLSync sync, GLbitfield flags, GLuint64 timeout);
+    void waitSync(WebGLSync sync, GLbitfield flags, GLint64 timeout);
+    any getSyncParameter(WebGLSync sync, GLenum pname);
+
+    /* Transform Feedback */
+    WebGLTransformFeedback? createTransformFeedback();
+    void deleteTransformFeedback(WebGLTransformFeedback? tf);
+    [WebGLHandlesContextLoss] GLboolean isTransformFeedback(WebGLTransformFeedback? tf);
+    void bindTransformFeedback(GLenum target, WebGLTransformFeedback? tf);
+    void beginTransformFeedback(GLenum primitiveMode);
+    void endTransformFeedback();
+    void transformFeedbackVaryings(WebGLProgram program, sequence<DOMString> varyings, GLenum bufferMode);
+    [NewObject]
+    WebGLActiveInfo? getTransformFeedbackVarying(WebGLProgram program, GLuint index);
+    void pauseTransformFeedback();
+    void resumeTransformFeedback();
+
+    /* Uniform Buffer Objects and Transform Feedback Buffers */
+    void bindBufferBase(GLenum target, GLuint index, WebGLBuffer? buffer);
+    void bindBufferRange(GLenum target, GLuint index, WebGLBuffer? buffer, GLintptr offset, GLsizeiptr size);
+    [Throws] // GetOrCreateDOMReflector can fail.
+    any getIndexedParameter(GLenum target, GLuint index);
+    sequence<GLuint>? getUniformIndices(WebGLProgram program, sequence<DOMString> uniformNames);
+    any getActiveUniforms(WebGLProgram program, sequence<GLuint> uniformIndices, GLenum pname);
+    GLuint getUniformBlockIndex(WebGLProgram program, DOMString uniformBlockName);
+    [Throws] // Creating a Uint32Array can fail.
+    any getActiveUniformBlockParameter(WebGLProgram program, GLuint uniformBlockIndex, GLenum pname);
+    DOMString? getActiveUniformBlockName(WebGLProgram program, GLuint uniformBlockIndex);
+    void uniformBlockBinding(WebGLProgram program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
+
+    /* Vertex Array Objects */
+    WebGLVertexArrayObject? createVertexArray();
+    void deleteVertexArray(WebGLVertexArrayObject? vertexArray);
+    [WebGLHandlesContextLoss] GLboolean isVertexArray(WebGLVertexArrayObject? vertexArray);
+    void bindVertexArray(WebGLVertexArrayObject? array);
+};
+
+WebGL2RenderingContextBase implements WebGLRenderingContextBase;
+WebGL2RenderingContext implements WebGL2RenderingContextBase;
+
+[NoInterfaceObject]
+interface EXT_color_buffer_float {
+};
diff --git a/dom/webidl/WebGLContextEvent.webidl b/dom/webidl/WebGLContextEvent.webidl
new file mode 100644
index 000000000..8b227da72
--- /dev/null
+++ b/dom/webidl/WebGLContextEvent.webidl
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+
+ * The origin of this IDL file is
+ * https://www.khronos.org/registry/webgl/specs/latest/1.0/#fire-a-webgl-context-event
+ */
+
+[Constructor(DOMString type, optional WebGLContextEventInit eventInit),
+ Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLContextEvent : Event {
+  readonly attribute DOMString statusMessage;
+};
+
+// EventInit is defined in the DOM4 specification.
+dictionary WebGLContextEventInit : EventInit {
+  DOMString statusMessage = "";
+};
diff --git a/dom/webidl/WebGLRenderingContext.webidl b/dom/webidl/WebGLRenderingContext.webidl
new file mode 100644
index 000000000..323d23421
--- /dev/null
+++ b/dom/webidl/WebGLRenderingContext.webidl
@@ -0,0 +1,1057 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://www.khronos.org/registry/webgl/specs/latest/webgl.idl
+ *
+ * Copyright © 2012 Khronos Group
+ */
+
+// WebGL IDL definitions scraped from the Khronos specification:
+// https://www.khronos.org/registry/webgl/specs/latest/
+//
+// This IDL depends on the typed array specification defined at:
+// https://www.khronos.org/registry/typedarray/specs/latest/typedarrays.idl
+
+typedef unsigned long  GLenum;
+typedef boolean        GLboolean;
+typedef unsigned long  GLbitfield;
+typedef byte           GLbyte;         /* 'byte' should be a signed 8 bit type. */
+typedef short          GLshort;
+typedef long           GLint;
+typedef long           GLsizei;
+typedef long long      GLintptr;
+typedef long long      GLsizeiptr;
+// Ideally the typedef below would use 'unsigned byte', but that doesn't currently exist in Web IDL.
+typedef octet          GLubyte;        /* 'octet' should be an unsigned 8 bit type. */
+typedef unsigned short GLushort;
+typedef unsigned long  GLuint;
+typedef unrestricted float GLfloat;
+typedef unrestricted float GLclampf;
+typedef unsigned long long GLuint64EXT;
+
+dictionary WebGLContextAttributes {
+    // boolean alpha = true;
+    // We deviate from the spec here.
+    // If alpha isn't specified, we rely on a pref ("webgl.default-no-alpha")
+    GLboolean alpha;
+    GLboolean depth = true;
+    GLboolean stencil = false;
+    GLboolean antialias = true;
+    GLboolean premultipliedAlpha = true;
+    GLboolean preserveDrawingBuffer = false;
+    GLboolean failIfMajorPerformanceCaveat = false;
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLBuffer {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLFramebuffer {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLProgram {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLRenderbuffer {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLShader {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLTexture {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLUniformLocation {
+};
+
+interface WebGLVertexArrayObject {
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLActiveInfo {
+    readonly attribute GLint size;
+    readonly attribute GLenum type;
+    readonly attribute DOMString name;
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLShaderPrecisionFormat {
+    readonly attribute GLint rangeMin;
+    readonly attribute GLint rangeMax;
+    readonly attribute GLint precision;
+};
+
+typedef (Float32Array or sequence<GLfloat>) Float32List;
+typedef (Int32Array or sequence<GLint>) Int32List;
+
+// Shared interface for the things that WebGLRenderingContext and
+// WebGL2RenderingContext have in common.  This doesn't have all the things they
+// have in common, because we don't support splitting multiple overloads of the
+// same method across separate interfaces and pulling them in with "implements".
+[Exposed=(Window, Worker), NoInterfaceObject]
+interface WebGLRenderingContextBase {
+    /* ClearBufferMask */
+    const GLenum DEPTH_BUFFER_BIT               = 0x00000100;
+    const GLenum STENCIL_BUFFER_BIT             = 0x00000400;
+    const GLenum COLOR_BUFFER_BIT               = 0x00004000;
+
+    /* BeginMode */
+    const GLenum POINTS                         = 0x0000;
+    const GLenum LINES                          = 0x0001;
+    const GLenum LINE_LOOP                      = 0x0002;
+    const GLenum LINE_STRIP                     = 0x0003;
+    const GLenum TRIANGLES                      = 0x0004;
+    const GLenum TRIANGLE_STRIP                 = 0x0005;
+    const GLenum TRIANGLE_FAN                   = 0x0006;
+
+    /* AlphaFunction (not supported in ES20) */
+    /*      NEVER */
+    /*      LESS */
+    /*      EQUAL */
+    /*      LEQUAL */
+    /*      GREATER */
+    /*      NOTEQUAL */
+    /*      GEQUAL */
+    /*      ALWAYS */
+
+    /* BlendingFactorDest */
+    const GLenum ZERO                           = 0;
+    const GLenum ONE                            = 1;
+    const GLenum SRC_COLOR                      = 0x0300;
+    const GLenum ONE_MINUS_SRC_COLOR            = 0x0301;
+    const GLenum SRC_ALPHA                      = 0x0302;
+    const GLenum ONE_MINUS_SRC_ALPHA            = 0x0303;
+    const GLenum DST_ALPHA                      = 0x0304;
+    const GLenum ONE_MINUS_DST_ALPHA            = 0x0305;
+
+    /* BlendingFactorSrc */
+    /*      ZERO */
+    /*      ONE */
+    const GLenum DST_COLOR                      = 0x0306;
+    const GLenum ONE_MINUS_DST_COLOR            = 0x0307;
+    const GLenum SRC_ALPHA_SATURATE             = 0x0308;
+    /*      SRC_ALPHA */
+    /*      ONE_MINUS_SRC_ALPHA */
+    /*      DST_ALPHA */
+    /*      ONE_MINUS_DST_ALPHA */
+
+    /* BlendEquationSeparate */
+    const GLenum FUNC_ADD                       = 0x8006;
+    const GLenum BLEND_EQUATION                 = 0x8009;
+    const GLenum BLEND_EQUATION_RGB             = 0x8009;   /* same as BLEND_EQUATION */
+    const GLenum BLEND_EQUATION_ALPHA           = 0x883D;
+
+    /* BlendSubtract */
+    const GLenum FUNC_SUBTRACT                  = 0x800A;
+    const GLenum FUNC_REVERSE_SUBTRACT          = 0x800B;
+
+    /* Separate Blend Functions */
+    const GLenum BLEND_DST_RGB                  = 0x80C8;
+    const GLenum BLEND_SRC_RGB                  = 0x80C9;
+    const GLenum BLEND_DST_ALPHA                = 0x80CA;
+    const GLenum BLEND_SRC_ALPHA                = 0x80CB;
+    const GLenum CONSTANT_COLOR                 = 0x8001;
+    const GLenum ONE_MINUS_CONSTANT_COLOR       = 0x8002;
+    const GLenum CONSTANT_ALPHA                 = 0x8003;
+    const GLenum ONE_MINUS_CONSTANT_ALPHA       = 0x8004;
+    const GLenum BLEND_COLOR                    = 0x8005;
+
+    /* Buffer Objects */
+    const GLenum ARRAY_BUFFER                   = 0x8892;
+    const GLenum ELEMENT_ARRAY_BUFFER           = 0x8893;
+    const GLenum ARRAY_BUFFER_BINDING           = 0x8894;
+    const GLenum ELEMENT_ARRAY_BUFFER_BINDING   = 0x8895;
+
+    const GLenum STREAM_DRAW                    = 0x88E0;
+    const GLenum STATIC_DRAW                    = 0x88E4;
+    const GLenum DYNAMIC_DRAW                   = 0x88E8;
+
+    const GLenum BUFFER_SIZE                    = 0x8764;
+    const GLenum BUFFER_USAGE                   = 0x8765;
+
+    const GLenum CURRENT_VERTEX_ATTRIB          = 0x8626;
+
+    /* CullFaceMode */
+    const GLenum FRONT                          = 0x0404;
+    const GLenum BACK                           = 0x0405;
+    const GLenum FRONT_AND_BACK                 = 0x0408;
+
+    /* DepthFunction */
+    /*      NEVER */
+    /*      LESS */
+    /*      EQUAL */
+    /*      LEQUAL */
+    /*      GREATER */
+    /*      NOTEQUAL */
+    /*      GEQUAL */
+    /*      ALWAYS */
+
+    /* EnableCap */
+    /* TEXTURE_2D */
+    const GLenum CULL_FACE                      = 0x0B44;
+    const GLenum BLEND                          = 0x0BE2;
+    const GLenum DITHER                         = 0x0BD0;
+    const GLenum STENCIL_TEST                   = 0x0B90;
+    const GLenum DEPTH_TEST                     = 0x0B71;
+    const GLenum SCISSOR_TEST                   = 0x0C11;
+    const GLenum POLYGON_OFFSET_FILL            = 0x8037;
+    const GLenum SAMPLE_ALPHA_TO_COVERAGE       = 0x809E;
+    const GLenum SAMPLE_COVERAGE                = 0x80A0;
+
+    /* ErrorCode */
+    const GLenum NO_ERROR                       = 0;
+    const GLenum INVALID_ENUM                   = 0x0500;
+    const GLenum INVALID_VALUE                  = 0x0501;
+    const GLenum INVALID_OPERATION              = 0x0502;
+    const GLenum OUT_OF_MEMORY                  = 0x0505;
+
+    /* FrontFaceDirection */
+    const GLenum CW                             = 0x0900;
+    const GLenum CCW                            = 0x0901;
+
+    /* GetPName */
+    const GLenum LINE_WIDTH                     = 0x0B21;
+    const GLenum ALIASED_POINT_SIZE_RANGE       = 0x846D;
+    const GLenum ALIASED_LINE_WIDTH_RANGE       = 0x846E;
+    const GLenum CULL_FACE_MODE                 = 0x0B45;
+    const GLenum FRONT_FACE                     = 0x0B46;
+    const GLenum DEPTH_RANGE                    = 0x0B70;
+    const GLenum DEPTH_WRITEMASK                = 0x0B72;
+    const GLenum DEPTH_CLEAR_VALUE              = 0x0B73;
+    const GLenum DEPTH_FUNC                     = 0x0B74;
+    const GLenum STENCIL_CLEAR_VALUE            = 0x0B91;
+    const GLenum STENCIL_FUNC                   = 0x0B92;
+    const GLenum STENCIL_FAIL                   = 0x0B94;
+    const GLenum STENCIL_PASS_DEPTH_FAIL        = 0x0B95;
+    const GLenum STENCIL_PASS_DEPTH_PASS        = 0x0B96;
+    const GLenum STENCIL_REF                    = 0x0B97;
+    const GLenum STENCIL_VALUE_MASK             = 0x0B93;
+    const GLenum STENCIL_WRITEMASK              = 0x0B98;
+    const GLenum STENCIL_BACK_FUNC              = 0x8800;
+    const GLenum STENCIL_BACK_FAIL              = 0x8801;
+    const GLenum STENCIL_BACK_PASS_DEPTH_FAIL   = 0x8802;
+    const GLenum STENCIL_BACK_PASS_DEPTH_PASS   = 0x8803;
+    const GLenum STENCIL_BACK_REF               = 0x8CA3;
+    const GLenum STENCIL_BACK_VALUE_MASK        = 0x8CA4;
+    const GLenum STENCIL_BACK_WRITEMASK         = 0x8CA5;
+    const GLenum VIEWPORT                       = 0x0BA2;
+    const GLenum SCISSOR_BOX                    = 0x0C10;
+    /*      SCISSOR_TEST */
+    const GLenum COLOR_CLEAR_VALUE              = 0x0C22;
+    const GLenum COLOR_WRITEMASK                = 0x0C23;
+    const GLenum UNPACK_ALIGNMENT               = 0x0CF5;
+    const GLenum PACK_ALIGNMENT                 = 0x0D05;
+    const GLenum MAX_TEXTURE_SIZE               = 0x0D33;
+    const GLenum MAX_VIEWPORT_DIMS              = 0x0D3A;
+    const GLenum SUBPIXEL_BITS                  = 0x0D50;
+    const GLenum RED_BITS                       = 0x0D52;
+    const GLenum GREEN_BITS                     = 0x0D53;
+    const GLenum BLUE_BITS                      = 0x0D54;
+    const GLenum ALPHA_BITS                     = 0x0D55;
+    const GLenum DEPTH_BITS                     = 0x0D56;
+    const GLenum STENCIL_BITS                   = 0x0D57;
+    const GLenum POLYGON_OFFSET_UNITS           = 0x2A00;
+    /*      POLYGON_OFFSET_FILL */
+    const GLenum POLYGON_OFFSET_FACTOR          = 0x8038;
+    const GLenum TEXTURE_BINDING_2D             = 0x8069;
+    const GLenum SAMPLE_BUFFERS                 = 0x80A8;
+    const GLenum SAMPLES                        = 0x80A9;
+    const GLenum SAMPLE_COVERAGE_VALUE          = 0x80AA;
+    const GLenum SAMPLE_COVERAGE_INVERT         = 0x80AB;
+
+    /* GetTextureParameter */
+    /*      TEXTURE_MAG_FILTER */
+    /*      TEXTURE_MIN_FILTER */
+    /*      TEXTURE_WRAP_S */
+    /*      TEXTURE_WRAP_T */
+
+    const GLenum COMPRESSED_TEXTURE_FORMATS     = 0x86A3;
+
+    /* HintMode */
+    const GLenum DONT_CARE                      = 0x1100;
+    const GLenum FASTEST                        = 0x1101;
+    const GLenum NICEST                         = 0x1102;
+
+    /* HintTarget */
+    const GLenum GENERATE_MIPMAP_HINT            = 0x8192;
+
+    /* DataType */
+    const GLenum BYTE                           = 0x1400;
+    const GLenum UNSIGNED_BYTE                  = 0x1401;
+    const GLenum SHORT                          = 0x1402;
+    const GLenum UNSIGNED_SHORT                 = 0x1403;
+    const GLenum INT                            = 0x1404;
+    const GLenum UNSIGNED_INT                   = 0x1405;
+    const GLenum FLOAT                          = 0x1406;
+
+    /* PixelFormat */
+    const GLenum DEPTH_COMPONENT                = 0x1902;
+    const GLenum ALPHA                          = 0x1906;
+    const GLenum RGB                            = 0x1907;
+    const GLenum RGBA                           = 0x1908;
+    const GLenum LUMINANCE                      = 0x1909;
+    const GLenum LUMINANCE_ALPHA                = 0x190A;
+
+    /* PixelType */
+    /*      UNSIGNED_BYTE */
+    const GLenum UNSIGNED_SHORT_4_4_4_4         = 0x8033;
+    const GLenum UNSIGNED_SHORT_5_5_5_1         = 0x8034;
+    const GLenum UNSIGNED_SHORT_5_6_5           = 0x8363;
+
+    /* Shaders */
+    const GLenum FRAGMENT_SHADER                  = 0x8B30;
+    const GLenum VERTEX_SHADER                    = 0x8B31;
+    const GLenum MAX_VERTEX_ATTRIBS               = 0x8869;
+    const GLenum MAX_VERTEX_UNIFORM_VECTORS       = 0x8DFB;
+    const GLenum MAX_VARYING_VECTORS              = 0x8DFC;
+    const GLenum MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D;
+    const GLenum MAX_VERTEX_TEXTURE_IMAGE_UNITS   = 0x8B4C;
+    const GLenum MAX_TEXTURE_IMAGE_UNITS          = 0x8872;
+    const GLenum MAX_FRAGMENT_UNIFORM_VECTORS     = 0x8DFD;
+    const GLenum SHADER_TYPE                      = 0x8B4F;
+    const GLenum DELETE_STATUS                    = 0x8B80;
+    const GLenum LINK_STATUS                      = 0x8B82;
+    const GLenum VALIDATE_STATUS                  = 0x8B83;
+    const GLenum ATTACHED_SHADERS                 = 0x8B85;
+    const GLenum ACTIVE_UNIFORMS                  = 0x8B86;
+    const GLenum ACTIVE_ATTRIBUTES                = 0x8B89;
+    const GLenum SHADING_LANGUAGE_VERSION         = 0x8B8C;
+    const GLenum CURRENT_PROGRAM                  = 0x8B8D;
+
+    /* StencilFunction */
+    const GLenum NEVER                          = 0x0200;
+    const GLenum LESS                           = 0x0201;
+    const GLenum EQUAL                          = 0x0202;
+    const GLenum LEQUAL                         = 0x0203;
+    const GLenum GREATER                        = 0x0204;
+    const GLenum NOTEQUAL                       = 0x0205;
+    const GLenum GEQUAL                         = 0x0206;
+    const GLenum ALWAYS                         = 0x0207;
+
+    /* StencilOp */
+    /*      ZERO */
+    const GLenum KEEP                           = 0x1E00;
+    const GLenum REPLACE                        = 0x1E01;
+    const GLenum INCR                           = 0x1E02;
+    const GLenum DECR                           = 0x1E03;
+    const GLenum INVERT                         = 0x150A;
+    const GLenum INCR_WRAP                      = 0x8507;
+    const GLenum DECR_WRAP                      = 0x8508;
+
+    /* StringName */
+    const GLenum VENDOR                         = 0x1F00;
+    const GLenum RENDERER                       = 0x1F01;
+    const GLenum VERSION                        = 0x1F02;
+
+    /* TextureMagFilter */
+    const GLenum NEAREST                        = 0x2600;
+    const GLenum LINEAR                         = 0x2601;
+
+    /* TextureMinFilter */
+    /*      NEAREST */
+    /*      LINEAR */
+    const GLenum NEAREST_MIPMAP_NEAREST         = 0x2700;
+    const GLenum LINEAR_MIPMAP_NEAREST          = 0x2701;
+    const GLenum NEAREST_MIPMAP_LINEAR          = 0x2702;
+    const GLenum LINEAR_MIPMAP_LINEAR           = 0x2703;
+
+    /* TextureParameterName */
+    const GLenum TEXTURE_MAG_FILTER             = 0x2800;
+    const GLenum TEXTURE_MIN_FILTER             = 0x2801;
+    const GLenum TEXTURE_WRAP_S                 = 0x2802;
+    const GLenum TEXTURE_WRAP_T                 = 0x2803;
+
+    /* TextureTarget */
+    const GLenum TEXTURE_2D                     = 0x0DE1;
+    const GLenum TEXTURE                        = 0x1702;
+
+    const GLenum TEXTURE_CUBE_MAP               = 0x8513;
+    const GLenum TEXTURE_BINDING_CUBE_MAP       = 0x8514;
+    const GLenum TEXTURE_CUBE_MAP_POSITIVE_X    = 0x8515;
+    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_X    = 0x8516;
+    const GLenum TEXTURE_CUBE_MAP_POSITIVE_Y    = 0x8517;
+    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_Y    = 0x8518;
+    const GLenum TEXTURE_CUBE_MAP_POSITIVE_Z    = 0x8519;
+    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_Z    = 0x851A;
+    const GLenum MAX_CUBE_MAP_TEXTURE_SIZE      = 0x851C;
+
+    /* TextureUnit */
+    const GLenum TEXTURE0                       = 0x84C0;
+    const GLenum TEXTURE1                       = 0x84C1;
+    const GLenum TEXTURE2                       = 0x84C2;
+    const GLenum TEXTURE3                       = 0x84C3;
+    const GLenum TEXTURE4                       = 0x84C4;
+    const GLenum TEXTURE5                       = 0x84C5;
+    const GLenum TEXTURE6                       = 0x84C6;
+    const GLenum TEXTURE7                       = 0x84C7;
+    const GLenum TEXTURE8                       = 0x84C8;
+    const GLenum TEXTURE9                       = 0x84C9;
+    const GLenum TEXTURE10                      = 0x84CA;
+    const GLenum TEXTURE11                      = 0x84CB;
+    const GLenum TEXTURE12                      = 0x84CC;
+    const GLenum TEXTURE13                      = 0x84CD;
+    const GLenum TEXTURE14                      = 0x84CE;
+    const GLenum TEXTURE15                      = 0x84CF;
+    const GLenum TEXTURE16                      = 0x84D0;
+    const GLenum TEXTURE17                      = 0x84D1;
+    const GLenum TEXTURE18                      = 0x84D2;
+    const GLenum TEXTURE19                      = 0x84D3;
+    const GLenum TEXTURE20                      = 0x84D4;
+    const GLenum TEXTURE21                      = 0x84D5;
+    const GLenum TEXTURE22                      = 0x84D6;
+    const GLenum TEXTURE23                      = 0x84D7;
+    const GLenum TEXTURE24                      = 0x84D8;
+    const GLenum TEXTURE25                      = 0x84D9;
+    const GLenum TEXTURE26                      = 0x84DA;
+    const GLenum TEXTURE27                      = 0x84DB;
+    const GLenum TEXTURE28                      = 0x84DC;
+    const GLenum TEXTURE29                      = 0x84DD;
+    const GLenum TEXTURE30                      = 0x84DE;
+    const GLenum TEXTURE31                      = 0x84DF;
+    const GLenum ACTIVE_TEXTURE                 = 0x84E0;
+
+    /* TextureWrapMode */
+    const GLenum REPEAT                         = 0x2901;
+    const GLenum CLAMP_TO_EDGE                  = 0x812F;
+    const GLenum MIRRORED_REPEAT                = 0x8370;
+
+    /* Uniform Types */
+    const GLenum FLOAT_VEC2                     = 0x8B50;
+    const GLenum FLOAT_VEC3                     = 0x8B51;
+    const GLenum FLOAT_VEC4                     = 0x8B52;
+    const GLenum INT_VEC2                       = 0x8B53;
+    const GLenum INT_VEC3                       = 0x8B54;
+    const GLenum INT_VEC4                       = 0x8B55;
+    const GLenum BOOL                           = 0x8B56;
+    const GLenum BOOL_VEC2                      = 0x8B57;
+    const GLenum BOOL_VEC3                      = 0x8B58;
+    const GLenum BOOL_VEC4                      = 0x8B59;
+    const GLenum FLOAT_MAT2                     = 0x8B5A;
+    const GLenum FLOAT_MAT3                     = 0x8B5B;
+    const GLenum FLOAT_MAT4                     = 0x8B5C;
+    const GLenum SAMPLER_2D                     = 0x8B5E;
+    const GLenum SAMPLER_CUBE                   = 0x8B60;
+
+    /* Vertex Arrays */
+    const GLenum VERTEX_ATTRIB_ARRAY_ENABLED        = 0x8622;
+    const GLenum VERTEX_ATTRIB_ARRAY_SIZE           = 0x8623;
+    const GLenum VERTEX_ATTRIB_ARRAY_STRIDE         = 0x8624;
+    const GLenum VERTEX_ATTRIB_ARRAY_TYPE           = 0x8625;
+    const GLenum VERTEX_ATTRIB_ARRAY_NORMALIZED     = 0x886A;
+    const GLenum VERTEX_ATTRIB_ARRAY_POINTER        = 0x8645;
+    const GLenum VERTEX_ATTRIB_ARRAY_BUFFER_BINDING = 0x889F;
+
+    /* Read Format */
+    const GLenum IMPLEMENTATION_COLOR_READ_TYPE   = 0x8B9A;
+    const GLenum IMPLEMENTATION_COLOR_READ_FORMAT = 0x8B9B;
+
+    /* Shader Source */
+    const GLenum COMPILE_STATUS                 = 0x8B81;
+
+    /* Shader Precision-Specified Types */
+    const GLenum LOW_FLOAT                      = 0x8DF0;
+    const GLenum MEDIUM_FLOAT                   = 0x8DF1;
+    const GLenum HIGH_FLOAT                     = 0x8DF2;
+    const GLenum LOW_INT                        = 0x8DF3;
+    const GLenum MEDIUM_INT                     = 0x8DF4;
+    const GLenum HIGH_INT                       = 0x8DF5;
+
+    /* Framebuffer Object. */
+    const GLenum FRAMEBUFFER                    = 0x8D40;
+    const GLenum RENDERBUFFER                   = 0x8D41;
+
+    const GLenum RGBA4                          = 0x8056;
+    const GLenum RGB5_A1                        = 0x8057;
+    const GLenum RGB565                         = 0x8D62;
+    const GLenum DEPTH_COMPONENT16              = 0x81A5;
+    const GLenum STENCIL_INDEX                  = 0x1901;
+    const GLenum STENCIL_INDEX8                 = 0x8D48;
+    const GLenum DEPTH_STENCIL                  = 0x84F9;
+
+    const GLenum RENDERBUFFER_WIDTH             = 0x8D42;
+    const GLenum RENDERBUFFER_HEIGHT            = 0x8D43;
+    const GLenum RENDERBUFFER_INTERNAL_FORMAT   = 0x8D44;
+    const GLenum RENDERBUFFER_RED_SIZE          = 0x8D50;
+    const GLenum RENDERBUFFER_GREEN_SIZE        = 0x8D51;
+    const GLenum RENDERBUFFER_BLUE_SIZE         = 0x8D52;
+    const GLenum RENDERBUFFER_ALPHA_SIZE        = 0x8D53;
+    const GLenum RENDERBUFFER_DEPTH_SIZE        = 0x8D54;
+    const GLenum RENDERBUFFER_STENCIL_SIZE      = 0x8D55;
+
+    const GLenum FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE           = 0x8CD0;
+    const GLenum FRAMEBUFFER_ATTACHMENT_OBJECT_NAME           = 0x8CD1;
+    const GLenum FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL         = 0x8CD2;
+    const GLenum FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE = 0x8CD3;
+
+    const GLenum COLOR_ATTACHMENT0              = 0x8CE0;
+    const GLenum DEPTH_ATTACHMENT               = 0x8D00;
+    const GLenum STENCIL_ATTACHMENT             = 0x8D20;
+    const GLenum DEPTH_STENCIL_ATTACHMENT       = 0x821A;
+
+    const GLenum NONE                           = 0;
+
+    const GLenum FRAMEBUFFER_COMPLETE                      = 0x8CD5;
+    const GLenum FRAMEBUFFER_INCOMPLETE_ATTACHMENT         = 0x8CD6;
+    const GLenum FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7;
+    const GLenum FRAMEBUFFER_INCOMPLETE_DIMENSIONS         = 0x8CD9;
+    const GLenum FRAMEBUFFER_UNSUPPORTED                   = 0x8CDD;
+
+    const GLenum FRAMEBUFFER_BINDING            = 0x8CA6;
+    const GLenum RENDERBUFFER_BINDING           = 0x8CA7;
+    const GLenum MAX_RENDERBUFFER_SIZE          = 0x84E8;
+
+    const GLenum INVALID_FRAMEBUFFER_OPERATION  = 0x0506;
+
+    /* WebGL-specific enums */
+    const GLenum UNPACK_FLIP_Y_WEBGL            = 0x9240;
+    const GLenum UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241;
+    const GLenum CONTEXT_LOST_WEBGL             = 0x9242;
+    const GLenum UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243;
+    const GLenum BROWSER_DEFAULT_WEBGL          = 0x9244;
+
+    // The canvas might actually be null in some cases, apparently.
+    readonly attribute (HTMLCanvasElement or OffscreenCanvas)? canvas;
+    readonly attribute GLsizei drawingBufferWidth;
+    readonly attribute GLsizei drawingBufferHeight;
+
+    [WebGLHandlesContextLoss] WebGLContextAttributes? getContextAttributes();
+    [WebGLHandlesContextLoss] boolean isContextLost();
+
+    [NeedsCallerType]
+    sequence<DOMString>? getSupportedExtensions();
+
+    [Throws, NeedsCallerType]
+    object? getExtension(DOMString name);
+
+    void activeTexture(GLenum texture);
+    void attachShader(WebGLProgram program, WebGLShader shader);
+    void bindAttribLocation(WebGLProgram program, GLuint index, DOMString name);
+    void bindBuffer(GLenum target, WebGLBuffer? buffer);
+    void bindFramebuffer(GLenum target, WebGLFramebuffer? framebuffer);
+    void bindRenderbuffer(GLenum target, WebGLRenderbuffer? renderbuffer);
+    void bindTexture(GLenum target, WebGLTexture? texture);
+    void blendColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
+    void blendEquation(GLenum mode);
+    void blendEquationSeparate(GLenum modeRGB, GLenum modeAlpha);
+    void blendFunc(GLenum sfactor, GLenum dfactor);
+    void blendFuncSeparate(GLenum srcRGB, GLenum dstRGB,
+                           GLenum srcAlpha, GLenum dstAlpha);
+
+    [WebGLHandlesContextLoss] GLenum checkFramebufferStatus(GLenum target);
+    void clear(GLbitfield mask);
+    void clearColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
+    void clearDepth(GLclampf depth);
+    void clearStencil(GLint s);
+    void colorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
+    void compileShader(WebGLShader shader);
+
+    void copyTexImage2D(GLenum target, GLint level, GLenum internalformat,
+                        GLint x, GLint y, GLsizei width, GLsizei height,
+                        GLint border);
+    void copyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                           GLint x, GLint y, GLsizei width, GLsizei height);
+
+    WebGLBuffer? createBuffer();
+    WebGLFramebuffer? createFramebuffer();
+    WebGLProgram? createProgram();
+    WebGLRenderbuffer? createRenderbuffer();
+    WebGLShader? createShader(GLenum type);
+    WebGLTexture? createTexture();
+
+    void cullFace(GLenum mode);
+
+    void deleteBuffer(WebGLBuffer? buffer);
+    void deleteFramebuffer(WebGLFramebuffer? framebuffer);
+    void deleteProgram(WebGLProgram? program);
+    void deleteRenderbuffer(WebGLRenderbuffer? renderbuffer);
+    void deleteShader(WebGLShader? shader);
+    void deleteTexture(WebGLTexture? texture);
+
+    void depthFunc(GLenum func);
+    void depthMask(GLboolean flag);
+    void depthRange(GLclampf zNear, GLclampf zFar);
+    void detachShader(WebGLProgram program, WebGLShader shader);
+    void disable(GLenum cap);
+    void disableVertexAttribArray(GLuint index);
+    void drawArrays(GLenum mode, GLint first, GLsizei count);
+    void drawElements(GLenum mode, GLsizei count, GLenum type, GLintptr offset);
+
+    void enable(GLenum cap);
+    void enableVertexAttribArray(GLuint index);
+    void finish();
+    void flush();
+    void framebufferRenderbuffer(GLenum target, GLenum attachment,
+                                 GLenum renderbuffertarget,
+                                 WebGLRenderbuffer? renderbuffer);
+    void framebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget,
+                              WebGLTexture? texture, GLint level);
+    void frontFace(GLenum mode);
+
+    void generateMipmap(GLenum target);
+
+    [NewObject]
+    WebGLActiveInfo? getActiveAttrib(WebGLProgram program, GLuint index);
+    [NewObject]
+    WebGLActiveInfo? getActiveUniform(WebGLProgram program, GLuint index);
+
+    sequence<WebGLShader>? getAttachedShaders(WebGLProgram program);
+
+    [WebGLHandlesContextLoss] GLint getAttribLocation(WebGLProgram program, DOMString name);
+
+    any getBufferParameter(GLenum target, GLenum pname);
+    [Throws]
+    any getParameter(GLenum pname);
+
+    [WebGLHandlesContextLoss] GLenum getError();
+
+    [Throws]
+    any getFramebufferAttachmentParameter(GLenum target, GLenum attachment,
+                                          GLenum pname);
+    any getProgramParameter(WebGLProgram program, GLenum pname);
+    DOMString? getProgramInfoLog(WebGLProgram program);
+    any getRenderbufferParameter(GLenum target, GLenum pname);
+    any getShaderParameter(WebGLShader shader, GLenum pname);
+
+    [NewObject]
+    WebGLShaderPrecisionFormat? getShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype);
+
+    DOMString? getShaderInfoLog(WebGLShader shader);
+
+    DOMString? getShaderSource(WebGLShader shader);
+
+    any getTexParameter(GLenum target, GLenum pname);
+
+    any getUniform(WebGLProgram program, WebGLUniformLocation location);
+
+    [NewObject]
+    WebGLUniformLocation? getUniformLocation(WebGLProgram program, DOMString name);
+
+    [Throws]
+    any getVertexAttrib(GLuint index, GLenum pname);
+
+    [WebGLHandlesContextLoss] GLintptr getVertexAttribOffset(GLuint index, GLenum pname);
+
+    void hint(GLenum target, GLenum mode);
+    [WebGLHandlesContextLoss] GLboolean isBuffer(WebGLBuffer? buffer);
+    [WebGLHandlesContextLoss] GLboolean isEnabled(GLenum cap);
+    [WebGLHandlesContextLoss] GLboolean isFramebuffer(WebGLFramebuffer? framebuffer);
+    [WebGLHandlesContextLoss] GLboolean isProgram(WebGLProgram? program);
+    [WebGLHandlesContextLoss] GLboolean isRenderbuffer(WebGLRenderbuffer? renderbuffer);
+    [WebGLHandlesContextLoss] GLboolean isShader(WebGLShader? shader);
+    [WebGLHandlesContextLoss] GLboolean isTexture(WebGLTexture? texture);
+    void lineWidth(GLfloat width);
+    void linkProgram(WebGLProgram program);
+    void pixelStorei(GLenum pname, GLint param);
+    void polygonOffset(GLfloat factor, GLfloat units);
+
+    void renderbufferStorage(GLenum target, GLenum internalformat,
+                             GLsizei width, GLsizei height);
+    void sampleCoverage(GLclampf value, GLboolean invert);
+    void scissor(GLint x, GLint y, GLsizei width, GLsizei height);
+
+    void shaderSource(WebGLShader shader, DOMString source);
+
+    void stencilFunc(GLenum func, GLint ref, GLuint mask);
+    void stencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
+    void stencilMask(GLuint mask);
+    void stencilMaskSeparate(GLenum face, GLuint mask);
+    void stencilOp(GLenum fail, GLenum zfail, GLenum zpass);
+    void stencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass);
+
+    void texParameterf(GLenum target, GLenum pname, GLfloat param);
+    void texParameteri(GLenum target, GLenum pname, GLint param);
+
+    void uniform1f(WebGLUniformLocation? location, GLfloat x);
+    void uniform2f(WebGLUniformLocation? location, GLfloat x, GLfloat y);
+    void uniform3f(WebGLUniformLocation? location, GLfloat x, GLfloat y, GLfloat z);
+    void uniform4f(WebGLUniformLocation? location, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+
+    void uniform1i(WebGLUniformLocation? location, GLint x);
+    void uniform2i(WebGLUniformLocation? location, GLint x, GLint y);
+    void uniform3i(WebGLUniformLocation? location, GLint x, GLint y, GLint z);
+    void uniform4i(WebGLUniformLocation? location, GLint x, GLint y, GLint z, GLint w);
+
+    void useProgram(WebGLProgram? program);
+    void validateProgram(WebGLProgram program);
+
+    void vertexAttrib1f(GLuint indx, GLfloat x);
+    void vertexAttrib1fv(GLuint indx, Float32List values);
+    void vertexAttrib2f(GLuint indx, GLfloat x, GLfloat y);
+    void vertexAttrib2fv(GLuint indx, Float32List values);
+    void vertexAttrib3f(GLuint indx, GLfloat x, GLfloat y, GLfloat z);
+    void vertexAttrib3fv(GLuint indx, Float32List values);
+    void vertexAttrib4f(GLuint indx, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+    void vertexAttrib4fv(GLuint indx, Float32List values);
+    void vertexAttribPointer(GLuint indx, GLint size, GLenum type,
+                             GLboolean normalized, GLsizei stride, GLintptr offset);
+
+    void viewport(GLint x, GLint y, GLsizei width, GLsizei height);
+};
+
+[Exposed=(Window,Worker),
+ Func="mozilla::dom::OffscreenCanvas::PrefEnabledOnWorkerThread"]
+interface WebGLRenderingContext {
+    // bufferData has WebGL2 overloads.
+    void bufferData(GLenum target, GLsizeiptr size, GLenum usage);
+    void bufferData(GLenum target, ArrayBuffer? data, GLenum usage);
+    void bufferData(GLenum target, ArrayBufferView data, GLenum usage);
+    // bufferSubData has WebGL2 overloads.
+    void bufferSubData(GLenum target, GLintptr offset, ArrayBuffer data);
+    void bufferSubData(GLenum target, GLintptr offset, ArrayBufferView data);
+
+    // compressedTexImage2D has WebGL2 overloads.
+    void compressedTexImage2D(GLenum target, GLint level, GLenum internalformat,
+                              GLsizei width, GLsizei height, GLint border,
+                              ArrayBufferView data);
+    // compressedTexSubImage2D has WebGL2 overloads.
+    void compressedTexSubImage2D(GLenum target, GLint level,
+                                 GLint xoffset, GLint yoffset,
+                                 GLsizei width, GLsizei height, GLenum format,
+                                 ArrayBufferView data);
+
+    // readPixels has WebGL2 overloads.
+    [Throws]
+    void readPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+                    GLenum format, GLenum type, ArrayBufferView? pixels);
+
+    // texImage2D has WebGL2 overloads.
+    // Overloads must share [Throws].
+    [Throws] // Can't actually throw.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLsizei width, GLsizei height, GLint border, GLenum format,
+                    GLenum type, ArrayBufferView? pixels);
+    [Throws] // Can't actually throw.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, ImageBitmap pixels);
+    [Throws] // Can't actually throw.
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, ImageData pixels);
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLImageElement image); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLCanvasElement canvas); // May throw DOMException
+    [Throws]
+    void texImage2D(GLenum target, GLint level, GLint internalformat,
+                    GLenum format, GLenum type, HTMLVideoElement video); // May throw DOMException
+
+    // texSubImage2D has WebGL2 overloads.
+    [Throws] // Can't actually throw.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLsizei width, GLsizei height,
+                       GLenum format, GLenum type, ArrayBufferView? pixels);
+    [Throws] // Can't actually throw.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, ImageBitmap pixels);
+    [Throws] // Can't actually throw.
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, ImageData pixels);
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLImageElement image); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLCanvasElement canvas); // May throw DOMException
+    [Throws]
+    void texSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset,
+                       GLenum format, GLenum type, HTMLVideoElement video); // May throw DOMException
+
+    // uniform*fv have WebGL2 overloads, or rather extensions, that are not
+    // distinguishable from the WebGL1 versions when called with two arguments.
+    void uniform1fv(WebGLUniformLocation? location, Float32List data);
+    void uniform2fv(WebGLUniformLocation? location, Float32List data);
+    void uniform3fv(WebGLUniformLocation? location, Float32List data);
+    void uniform4fv(WebGLUniformLocation? location, Float32List data);
+
+    // uniform*iv have WebGL2 overloads, or rather extensions, that are not
+    // distinguishable from the WebGL1 versions when called with two arguments.
+    void uniform1iv(WebGLUniformLocation? location, Int32List data);
+    void uniform2iv(WebGLUniformLocation? location, Int32List data);
+    void uniform3iv(WebGLUniformLocation? location, Int32List data);
+    void uniform4iv(WebGLUniformLocation? location, Int32List data);
+
+    // uniformMatrix*fv have WebGL2 overloads, or rather extensions, that are
+    // not distinguishable from the WebGL1 versions when called with two
+    // arguments.
+    void uniformMatrix2fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data);
+    void uniformMatrix3fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data);
+    void uniformMatrix4fv(WebGLUniformLocation? location, GLboolean transpose, Float32List data);
+};
+
+WebGLRenderingContext implements WebGLRenderingContextBase;
+
+// For OffscreenCanvas
+// Reference: https://wiki.whatwg.org/wiki/OffscreenCanvas
+[Exposed=(Window,Worker)]
+partial interface WebGLRenderingContext {
+    [Func="mozilla::dom::OffscreenCanvas::PrefEnabled"]
+    void commit();
+};
+
+////////////////////////////////////////
+// specific extension interfaces
+
+[NoInterfaceObject]
+interface WEBGL_compressed_texture_s3tc
+{
+    const GLenum COMPRESSED_RGB_S3TC_DXT1_EXT  = 0x83F0;
+    const GLenum COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1;
+    const GLenum COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2;
+    const GLenum COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3;
+};
+
+[NoInterfaceObject]
+interface WEBGL_compressed_texture_atc
+{
+    const GLenum COMPRESSED_RGB_ATC_WEBGL                     = 0x8C92;
+    const GLenum COMPRESSED_RGBA_ATC_EXPLICIT_ALPHA_WEBGL     = 0x8C93;
+    const GLenum COMPRESSED_RGBA_ATC_INTERPOLATED_ALPHA_WEBGL = 0x87EE;
+};
+
+[NoInterfaceObject]
+interface WEBGL_compressed_texture_etc
+{
+    const GLenum COMPRESSED_R11_EAC                                 = 0x9270;
+    const GLenum COMPRESSED_SIGNED_R11_EAC                          = 0x9271;
+    const GLenum COMPRESSED_RG11_EAC                                = 0x9272;
+    const GLenum COMPRESSED_SIGNED_RG11_EAC                         = 0x9273;
+    const GLenum COMPRESSED_RGB8_ETC2                               = 0x9274;
+    const GLenum COMPRESSED_SRGB8_ETC2                              = 0x9275;
+    const GLenum COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2           = 0x9276;
+    const GLenum COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2          = 0x9277;
+    const GLenum COMPRESSED_RGBA8_ETC2_EAC                          = 0x9278;
+    const GLenum COMPRESSED_SRGB8_ALPHA8_ETC2_EAC                   = 0x9279;
+};
+
+[NoInterfaceObject]
+interface WEBGL_compressed_texture_etc1
+{
+    const GLenum COMPRESSED_RGB_ETC1_WEBGL = 0x8D64;
+};
+
+[NoInterfaceObject]
+interface WEBGL_compressed_texture_pvrtc
+{
+    const GLenum COMPRESSED_RGB_PVRTC_4BPPV1_IMG  = 0x8C00;
+    const GLenum COMPRESSED_RGB_PVRTC_2BPPV1_IMG  = 0x8C01;
+    const GLenum COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02;
+    const GLenum COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03;
+};
+
+[NoInterfaceObject]
+interface WEBGL_debug_renderer_info
+{
+    const GLenum UNMASKED_VENDOR_WEBGL        = 0x9245;
+    const GLenum UNMASKED_RENDERER_WEBGL      = 0x9246;
+};
+
+[NoInterfaceObject]
+interface WEBGL_debug_shaders
+{
+    DOMString getTranslatedShaderSource(WebGLShader shader);
+};
+
+[NoInterfaceObject]
+interface WEBGL_depth_texture
+{
+    const GLenum UNSIGNED_INT_24_8_WEBGL = 0x84FA;
+};
+
+[NoInterfaceObject]
+interface OES_element_index_uint
+{
+};
+
+[NoInterfaceObject]
+interface EXT_frag_depth
+{
+};
+
+[NoInterfaceObject]
+interface WEBGL_lose_context {
+    void loseContext();
+    void restoreContext();
+};
+
+[NoInterfaceObject]
+interface EXT_texture_filter_anisotropic
+{
+    const GLenum TEXTURE_MAX_ANISOTROPY_EXT     = 0x84FE;
+    const GLenum MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF;
+};
+
+[NoInterfaceObject]
+interface EXT_sRGB
+{
+    const GLenum SRGB_EXT                                  = 0x8C40;
+    const GLenum SRGB_ALPHA_EXT                            = 0x8C42;
+    const GLenum SRGB8_ALPHA8_EXT                          = 0x8C43;
+    const GLenum FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING_EXT = 0x8210;
+};
+
+[NoInterfaceObject]
+interface OES_standard_derivatives {
+    const GLenum FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B;
+};
+
+[NoInterfaceObject]
+interface OES_texture_float
+{
+};
+
+[NoInterfaceObject]
+interface WEBGL_draw_buffers {
+    const GLenum COLOR_ATTACHMENT0_WEBGL     = 0x8CE0;
+    const GLenum COLOR_ATTACHMENT1_WEBGL     = 0x8CE1;
+    const GLenum COLOR_ATTACHMENT2_WEBGL     = 0x8CE2;
+    const GLenum COLOR_ATTACHMENT3_WEBGL     = 0x8CE3;
+    const GLenum COLOR_ATTACHMENT4_WEBGL     = 0x8CE4;
+    const GLenum COLOR_ATTACHMENT5_WEBGL     = 0x8CE5;
+    const GLenum COLOR_ATTACHMENT6_WEBGL     = 0x8CE6;
+    const GLenum COLOR_ATTACHMENT7_WEBGL     = 0x8CE7;
+    const GLenum COLOR_ATTACHMENT8_WEBGL     = 0x8CE8;
+    const GLenum COLOR_ATTACHMENT9_WEBGL     = 0x8CE9;
+    const GLenum COLOR_ATTACHMENT10_WEBGL    = 0x8CEA;
+    const GLenum COLOR_ATTACHMENT11_WEBGL    = 0x8CEB;
+    const GLenum COLOR_ATTACHMENT12_WEBGL    = 0x8CEC;
+    const GLenum COLOR_ATTACHMENT13_WEBGL    = 0x8CED;
+    const GLenum COLOR_ATTACHMENT14_WEBGL    = 0x8CEE;
+    const GLenum COLOR_ATTACHMENT15_WEBGL    = 0x8CEF;
+
+    const GLenum DRAW_BUFFER0_WEBGL          = 0x8825;
+    const GLenum DRAW_BUFFER1_WEBGL          = 0x8826;
+    const GLenum DRAW_BUFFER2_WEBGL          = 0x8827;
+    const GLenum DRAW_BUFFER3_WEBGL          = 0x8828;
+    const GLenum DRAW_BUFFER4_WEBGL          = 0x8829;
+    const GLenum DRAW_BUFFER5_WEBGL          = 0x882A;
+    const GLenum DRAW_BUFFER6_WEBGL          = 0x882B;
+    const GLenum DRAW_BUFFER7_WEBGL          = 0x882C;
+    const GLenum DRAW_BUFFER8_WEBGL          = 0x882D;
+    const GLenum DRAW_BUFFER9_WEBGL          = 0x882E;
+    const GLenum DRAW_BUFFER10_WEBGL         = 0x882F;
+    const GLenum DRAW_BUFFER11_WEBGL         = 0x8830;
+    const GLenum DRAW_BUFFER12_WEBGL         = 0x8831;
+    const GLenum DRAW_BUFFER13_WEBGL         = 0x8832;
+    const GLenum DRAW_BUFFER14_WEBGL         = 0x8833;
+    const GLenum DRAW_BUFFER15_WEBGL         = 0x8834;
+
+    const GLenum MAX_COLOR_ATTACHMENTS_WEBGL = 0x8CDF;
+    const GLenum MAX_DRAW_BUFFERS_WEBGL      = 0x8824;
+
+    void drawBuffersWEBGL(sequence<GLenum> buffers);
+};
+
+[NoInterfaceObject]
+interface OES_texture_float_linear
+{
+};
+
+[NoInterfaceObject]
+interface EXT_shader_texture_lod
+{
+};
+
+[NoInterfaceObject]
+interface OES_texture_half_float
+{
+    const GLenum HALF_FLOAT_OES = 0x8D61;
+};
+
+[NoInterfaceObject]
+interface OES_texture_half_float_linear
+{
+};
+
+[NoInterfaceObject]
+interface WEBGL_color_buffer_float
+{
+    const GLenum RGBA32F_EXT = 0x8814;
+    const GLenum RGB32F_EXT = 0x8815;
+    const GLenum FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT = 0x8211;
+    const GLenum UNSIGNED_NORMALIZED_EXT = 0x8C17;
+};
+
+[NoInterfaceObject]
+interface EXT_color_buffer_half_float
+{
+    const GLenum RGBA16F_EXT = 0x881A;
+    const GLenum RGB16F_EXT = 0x881B;
+    const GLenum FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE_EXT = 0x8211;
+    const GLenum UNSIGNED_NORMALIZED_EXT = 0x8C17;
+};
+
+[NoInterfaceObject]
+interface OES_vertex_array_object {
+    const GLenum VERTEX_ARRAY_BINDING_OES = 0x85B5;
+
+    WebGLVertexArrayObject? createVertexArrayOES();
+    void deleteVertexArrayOES(WebGLVertexArrayObject? arrayObject);
+    [WebGLHandlesContextLoss] GLboolean isVertexArrayOES(WebGLVertexArrayObject? arrayObject);
+    void bindVertexArrayOES(WebGLVertexArrayObject? arrayObject);
+};
+
+[NoInterfaceObject]
+interface ANGLE_instanced_arrays {
+    const GLenum VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE = 0x88FE;
+
+    void drawArraysInstancedANGLE(GLenum mode, GLint first, GLsizei count, GLsizei primcount);
+    void drawElementsInstancedANGLE(GLenum mode, GLsizei count, GLenum type, GLintptr offset, GLsizei primcount);
+    void vertexAttribDivisorANGLE(GLuint index, GLuint divisor);
+};
+
+[NoInterfaceObject]
+interface EXT_blend_minmax {
+    const GLenum MIN_EXT = 0x8007;
+    const GLenum MAX_EXT = 0x8008;
+};
+
+interface WebGLQuery {
+};
+
+[NoInterfaceObject]
+interface EXT_disjoint_timer_query {
+    const GLenum QUERY_COUNTER_BITS_EXT = 0x8864;
+    const GLenum CURRENT_QUERY_EXT = 0x8865;
+    const GLenum QUERY_RESULT_EXT = 0x8866;
+    const GLenum QUERY_RESULT_AVAILABLE_EXT = 0x8867;
+    const GLenum TIME_ELAPSED_EXT = 0x88BF;
+    const GLenum TIMESTAMP_EXT = 0x8E28;
+    const GLenum GPU_DISJOINT_EXT = 0x8FBB;
+
+    WebGLQuery? createQueryEXT();
+    void deleteQueryEXT(WebGLQuery? query);
+    [WebGLHandlesContextLoss] boolean isQueryEXT(WebGLQuery? query);
+    void beginQueryEXT(GLenum target, WebGLQuery query);
+    void endQueryEXT(GLenum target);
+    void queryCounterEXT(WebGLQuery query, GLenum target);
+    any getQueryEXT(GLenum target, GLenum pname);
+    any getQueryObjectEXT(WebGLQuery query, GLenum pname);
+};
+
+[NoInterfaceObject]
+interface MOZ_debug_get {
+    const GLenum EXTENSIONS = 0x1F03;
+    const GLenum WSI_INFO   = 0x10000;
+
+    [Throws]
+    any getParameter(GLenum pname);
+};
diff --git a/dom/webidl/WebKitCSSMatrix.webidl b/dom/webidl/WebKitCSSMatrix.webidl
new file mode 100644
index 000000000..8115711a3
--- /dev/null
+++ b/dom/webidl/WebKitCSSMatrix.webidl
@@ -0,0 +1,39 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://compat.spec.whatwg.org/#webkitcssmatrix-interface
+ */
+
+[Constructor,
+ Constructor(DOMString transformList),
+ Constructor(WebKitCSSMatrix other),
+ Exposed=Window,
+ Func="mozilla::dom::WebKitCSSMatrix::FeatureEnabled"]
+interface WebKitCSSMatrix : DOMMatrix {
+    // Mutable transform methods
+    [Throws]
+    WebKitCSSMatrix setMatrixValue(DOMString transformList);
+
+    // Immutable transform methods
+    WebKitCSSMatrix multiply(WebKitCSSMatrix other);
+    [Throws]
+    WebKitCSSMatrix inverse();
+    WebKitCSSMatrix translate(optional unrestricted double tx = 0,
+                              optional unrestricted double ty = 0,
+                              optional unrestricted double tz = 0);
+    WebKitCSSMatrix scale(optional unrestricted double scaleX = 1,
+                          optional unrestricted double scaleY,
+                          optional unrestricted double scaleZ = 1);
+    WebKitCSSMatrix rotate(optional unrestricted double rotX = 0,
+                           optional unrestricted double rotY,
+                           optional unrestricted double rotZ);
+    WebKitCSSMatrix rotateAxisAngle(optional unrestricted double x = 0,
+                                    optional unrestricted double y = 0,
+                                    optional unrestricted double z = 0,
+                                    optional unrestricted double angle = 0);
+    WebKitCSSMatrix skewX(optional unrestricted double sx = 0);
+    WebKitCSSMatrix skewY(optional unrestricted double sy = 0);
+};
diff --git a/dom/webidl/WebSocket.webidl b/dom/webidl/WebSocket.webidl
new file mode 100644
index 000000000..492e366ba
--- /dev/null
+++ b/dom/webidl/WebSocket.webidl
@@ -0,0 +1,77 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/html/#network
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of this document.
+ */
+
+enum BinaryType { "blob", "arraybuffer" };
+
+[Exposed=(Window,Worker),
+ Constructor(DOMString url),
+ Constructor(DOMString url, DOMString protocols),
+ Constructor(DOMString url, sequence<DOMString> protocols)]
+interface WebSocket : EventTarget {
+
+  readonly attribute DOMString url;
+
+  // ready state
+  const unsigned short CONNECTING = 0;
+  const unsigned short OPEN = 1;
+  const unsigned short CLOSING = 2;
+  const unsigned short CLOSED = 3;
+
+  readonly attribute unsigned short readyState;
+
+  readonly attribute unsigned long bufferedAmount;
+
+  // networking
+
+  attribute EventHandler onopen;
+
+  attribute EventHandler onerror;
+
+  attribute EventHandler onclose;
+
+  readonly attribute DOMString extensions;
+
+  readonly attribute DOMString protocol;
+
+  [Throws]
+  void close([Clamp] optional unsigned short code, optional DOMString reason);
+
+  // messaging
+
+  attribute EventHandler onmessage;
+
+  attribute BinaryType binaryType;
+
+  [Throws]
+  void send(DOMString data);
+
+  [Throws]
+  void send(Blob data);
+
+  [Throws]
+  void send(ArrayBuffer data);
+
+  [Throws]
+  void send(ArrayBufferView data);
+};
+
+// Support for creating server-side chrome-only WebSocket. Used in FlyWeb and in
+// devtools remote debugging server.
+interface nsITransportProvider;
+
+partial interface WebSocket {
+  [ChromeOnly, NewObject, Throws]
+  static WebSocket createServerWebSocket(DOMString url,
+                                         sequence<DOMString> protocols,
+                                         nsITransportProvider transportProvider,
+                                         DOMString negotiatedExtensions);
+};
diff --git a/dom/webidl/WheelEvent.webidl b/dom/webidl/WheelEvent.webidl
new file mode 100644
index 000000000..0c89bc73e
--- /dev/null
+++ b/dom/webidl/WheelEvent.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface please see
+ * http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Constructor(DOMString type, optional WheelEventInit eventInitDict)]
+interface WheelEvent : MouseEvent
+{
+  const unsigned long DOM_DELTA_PIXEL = 0x00;
+  const unsigned long DOM_DELTA_LINE  = 0x01;
+  const unsigned long DOM_DELTA_PAGE  = 0x02;
+
+  readonly attribute double        deltaX;
+  readonly attribute double        deltaY;
+  readonly attribute double        deltaZ;
+  readonly attribute unsigned long deltaMode;
+
+};
+
+dictionary WheelEventInit : MouseEventInit
+{
+  double deltaX = 0;
+  double deltaY = 0;
+  double deltaZ = 0;
+  unsigned long deltaMode = 0;
+};
diff --git a/dom/webidl/WifiOptions.webidl b/dom/webidl/WifiOptions.webidl
new file mode 100644
index 000000000..22105b1b0
--- /dev/null
+++ b/dom/webidl/WifiOptions.webidl
@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+  * This dictionnary holds the parameters sent to the wifi service.
+  */
+dictionary WifiCommandOptions
+{
+  long      id = 0;       // opaque id.
+  DOMString cmd = "";     // the command name.
+  DOMString request;      // for "command"
+};
+
+/**
+  * This dictionnary holds the parameters sent back to WifiWorker.js
+  */
+dictionary WifiResultOptions
+{
+  long      id = 0;             // opaque id.
+  long      status = 0;         // the return status of the command.
+                                // Used by most commands.
+  DOMString reply = "";         // for "command".
+};
+
+
+/**
+  * This dictionary holds the callback parameter sent back from WifiCertService
+  * to WifiWorker, and should only be passed around in chrome process.
+  */
+dictionary WifiCertServiceResultOptions
+{
+  long            id = 0;         // request id in WifiWorker.
+  long            status = 0;     // error code of the request, 0 indicates success.
+  unsigned short  usageFlag = 0;  // usage flag of certificate, the flag is defined
+                                  // in nsIWifiCertService.idl
+  DOMString       nickname = "";  // nickname of certificate of the request.
+};
diff --git a/dom/webidl/Window.webidl b/dom/webidl/Window.webidl
new file mode 100644
index 000000000..ad427630b
--- /dev/null
+++ b/dom/webidl/Window.webidl
@@ -0,0 +1,488 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ * https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html
+ * https://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html
+ * http://dev.w3.org/csswg/cssom/
+ * http://dev.w3.org/csswg/cssom-view/
+ * https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/RequestAnimationFrame/Overview.html
+ * https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html
+ * https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html
+ * http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+ * https://w3c.github.io/webappsec-secure-contexts/#monkey-patching-global-object
+ * https://w3c.github.io/requestidlecallback/
+ */
+
+interface ApplicationCache;
+interface IID;
+interface nsIBrowserDOMWindow;
+interface nsIMessageBroadcaster;
+interface nsIDOMCrypto;
+typedef any Transferable;
+
+// http://www.whatwg.org/specs/web-apps/current-work/
+[PrimaryGlobal, LegacyUnenumerableNamedProperties, NeedResolve]
+/*sealed*/ interface Window : EventTarget {
+  // the current browsing context
+  [Unforgeable, Constant, StoreInSlot,
+   CrossOriginReadable] readonly attribute Window window;
+  [Replaceable, Constant, StoreInSlot,
+   CrossOriginReadable] readonly attribute Window self;
+  [Unforgeable, StoreInSlot, Pure] readonly attribute Document? document;
+  [Throws] attribute DOMString name;
+  [PutForwards=href, Unforgeable, Throws,
+   CrossOriginReadable, CrossOriginWritable] readonly attribute Location? location;
+  [Throws] readonly attribute History history;
+  [Func="CustomElementRegistry::IsCustomElementEnabled"]
+  readonly attribute CustomElementRegistry customElements;
+  [Replaceable, Throws] readonly attribute BarProp locationbar;
+  [Replaceable, Throws] readonly attribute BarProp menubar;
+  [Replaceable, Throws] readonly attribute BarProp personalbar;
+  [Replaceable, Throws] readonly attribute BarProp scrollbars;
+  [Replaceable, Throws] readonly attribute BarProp statusbar;
+  [Replaceable, Throws] readonly attribute BarProp toolbar;
+  [Throws] attribute DOMString status;
+  [Throws, CrossOriginCallable, UnsafeInPrerendering] void close();
+  [Throws, CrossOriginReadable] readonly attribute boolean closed;
+  [Throws] void stop();
+  [Throws, CrossOriginCallable, UnsafeInPrerendering] void focus();
+  [Throws, CrossOriginCallable] void blur();
+
+  // other browsing contexts
+  [Replaceable, Throws, CrossOriginReadable] readonly attribute WindowProxy frames;
+  [Replaceable, CrossOriginReadable] readonly attribute unsigned long length;
+  //[Unforgeable, Throws, CrossOriginReadable] readonly attribute WindowProxy top;
+  [Unforgeable, Throws, CrossOriginReadable] readonly attribute WindowProxy? top;
+  [Throws, CrossOriginReadable] attribute any opener;
+  //[Throws] readonly attribute WindowProxy parent;
+  [Replaceable, Throws, CrossOriginReadable] readonly attribute WindowProxy? parent;
+  [Throws, NeedsSubjectPrincipal] readonly attribute Element? frameElement;
+  //[Throws] WindowProxy? open(optional USVString url = "about:blank", optional DOMString target = "_blank", [TreatNullAs=EmptyString] optional DOMString features = "");
+  [Throws, UnsafeInPrerendering] WindowProxy? open(optional DOMString url = "", optional DOMString target = "", [TreatNullAs=EmptyString] optional DOMString features = "");
+  getter object (DOMString name);
+
+  // the user agent
+  [Throws] readonly attribute Navigator navigator;
+#ifdef HAVE_SIDEBAR
+  [Replaceable, Throws] readonly attribute External external;
+#endif
+  [Throws, Pref="browser.cache.offline.enable"] readonly attribute ApplicationCache applicationCache;
+
+  // user prompts
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal] void alert();
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal] void alert(DOMString message);
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal] boolean confirm(optional DOMString message = "");
+  [Throws, UnsafeInPrerendering, NeedsSubjectPrincipal] DOMString? prompt(optional DOMString message = "", optional DOMString default = "");
+  [Throws, UnsafeInPrerendering] void print();
+
+  [Throws, CrossOriginCallable, NeedsSubjectPrincipal]
+  void postMessage(any message, DOMString targetOrigin, optional sequence<Transferable> transfer);
+
+  // also has obsolete members
+};
+Window implements GlobalEventHandlers;
+Window implements WindowEventHandlers;
+
+// https://www.w3.org/TR/appmanifest/#onappinstalled-attribute
+partial interface Window {
+  [Pref="dom.manifest.onappinstalled"]
+  attribute EventHandler onappinstalled;
+};
+
+// http://www.whatwg.org/specs/web-apps/current-work/
+[NoInterfaceObject]
+interface WindowSessionStorage {
+  //[Throws] readonly attribute Storage sessionStorage;
+  [Throws] readonly attribute Storage? sessionStorage;
+};
+Window implements WindowSessionStorage;
+
+// http://www.whatwg.org/specs/web-apps/current-work/
+[NoInterfaceObject]
+interface WindowLocalStorage {
+  [Throws] readonly attribute Storage? localStorage;
+};
+Window implements WindowLocalStorage;
+
+// http://www.whatwg.org/specs/web-apps/current-work/
+partial interface Window {
+  void captureEvents();
+  void releaseEvents();
+};
+
+// https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html
+partial interface Window {
+  //[Throws] Selection getSelection();
+  [Throws] Selection? getSelection();
+};
+
+// http://dev.w3.org/csswg/cssom/
+partial interface Window {
+  //[NewObject, Throws] CSSStyleDeclaration getComputedStyle(Element elt, optional DOMString pseudoElt = "");
+  [NewObject, Throws] CSSStyleDeclaration? getComputedStyle(Element elt, optional DOMString pseudoElt = "");
+};
+
+// http://dev.w3.org/csswg/cssom-view/
+enum ScrollBehavior { "auto", "instant", "smooth" };
+
+dictionary ScrollOptions {
+  ScrollBehavior behavior = "auto";
+};
+
+dictionary ScrollToOptions : ScrollOptions {
+  unrestricted double left;
+  unrestricted double top;
+};
+
+partial interface Window {
+  //[Throws,NewObject] MediaQueryList matchMedia(DOMString query);
+  [Throws,NewObject] MediaQueryList? matchMedia(DOMString query);
+  // Per spec, screen is SameObject, but we don't actually guarantee that given
+  // nsGlobalWindow::Cleanup.  :(
+  //[SameObject, Replaceable, Throws] readonly attribute Screen screen;
+  [Replaceable, Throws] readonly attribute Screen screen;
+
+  // browsing context
+  //[Throws] void moveTo(double x, double y);
+  //[Throws] void moveBy(double x, double y);
+  //[Throws] void resizeTo(double x, double y);
+  //[Throws] void resizeBy(double x, double y);
+  [Throws, UnsafeInPrerendering] void moveTo(long x, long y);
+  [Throws, UnsafeInPrerendering] void moveBy(long x, long y);
+  [Throws, UnsafeInPrerendering] void resizeTo(long x, long y);
+  [Throws, UnsafeInPrerendering] void resizeBy(long x, long y);
+
+  // viewport
+  // These are writable because we allow chrome to write them.  And they need
+  // to use 'any' as the type, because non-chrome writing them needs to act
+  // like a [Replaceable] attribute would, which needs the original JS value.
+  //[Replaceable, Throws] readonly attribute double innerWidth;
+  //[Replaceable, Throws] readonly attribute double innerHeight;
+  [Throws, NeedsCallerType] attribute any innerWidth;
+  [Throws, NeedsCallerType] attribute any innerHeight;
+
+  // viewport scrolling
+  void scroll(unrestricted double x, unrestricted double y);
+  void scroll(optional ScrollToOptions options);
+  void scrollTo(unrestricted double x, unrestricted double y);
+  void scrollTo(optional ScrollToOptions options);
+  void scrollBy(unrestricted double x, unrestricted double y);
+  void scrollBy(optional ScrollToOptions options);
+  // mozScrollSnap is used by chrome to perform scroll snapping after the
+  // user performs actions that may affect scroll position
+  // mozScrollSnap is deprecated, to be replaced by a web accessible API, such
+  // as an extension to the ScrollOptions dictionary.  See bug 1137937.
+  [ChromeOnly] void mozScrollSnap();
+  // The four properties below are double per spec at the moment, but whether
+  // that will continue is unclear.
+  [Replaceable, Throws] readonly attribute double scrollX;
+  [Throws] readonly attribute double pageXOffset;
+  [Replaceable, Throws] readonly attribute double scrollY;
+  [Throws] readonly attribute double pageYOffset;
+
+  // client
+  // These are writable because we allow chrome to write them.  And they need
+  // to use 'any' as the type, because non-chrome writing them needs to act
+  // like a [Replaceable] attribute would, which needs the original JS value.
+  //[Replaceable, Throws] readonly attribute double screenX;
+  //[Replaceable, Throws] readonly attribute double screenY;
+  //[Replaceable, Throws] readonly attribute double outerWidth;
+  //[Replaceable, Throws] readonly attribute double outerHeight;
+  [Throws, NeedsCallerType] attribute any screenX;
+  [Throws, NeedsCallerType] attribute any screenY;
+  [Throws, NeedsCallerType] attribute any outerWidth;
+  [Throws, NeedsCallerType] attribute any outerHeight;
+};
+
+/**
+ * Special function that gets the fill ratio from the compositor used for testing
+ * and is an indicator that we're layerizing correctly.
+ * This function will call the given callback current fill ratio for a
+ * composited frame. We don't guarantee which frame fill ratios will be returned.
+ */
+partial interface Window {
+  [ChromeOnly, Throws] void mozRequestOverfill(OverfillCallback callback);
+};
+callback OverfillCallback = void (unsigned long overfill);
+
+// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/RequestAnimationFrame/Overview.html
+partial interface Window {
+  [Throws] long requestAnimationFrame(FrameRequestCallback callback);
+  [Throws] void cancelAnimationFrame(long handle);
+};
+callback FrameRequestCallback = void (DOMHighResTimeStamp time);
+
+// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html
+partial interface Window {
+  [Replaceable, Pure, StoreInSlot] readonly attribute Performance? performance;
+};
+
+// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html
+Window implements GlobalCrypto;
+
+// https://fidoalliance.org/specifications/download/
+Window implements GlobalU2F;
+
+#ifdef MOZ_WEBSPEECH
+// http://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
+[NoInterfaceObject]
+interface SpeechSynthesisGetter {
+  [Throws, Pref="media.webspeech.synth.enabled"] readonly attribute SpeechSynthesis speechSynthesis;
+};
+
+Window implements SpeechSynthesisGetter;
+#endif
+
+// Mozilla-specific stuff
+partial interface Window {
+  //[NewObject, Throws] CSSStyleDeclaration getDefaultComputedStyle(Element elt, optional DOMString pseudoElt = "");
+  [NewObject, Throws] CSSStyleDeclaration? getDefaultComputedStyle(Element elt, optional DOMString pseudoElt = "");
+
+  // Mozilla extensions
+  /**
+   * Method for scrolling this window by a number of lines.
+   */
+  void                      scrollByLines(long numLines, optional ScrollOptions options);
+
+  /**
+   * Method for scrolling this window by a number of pages.
+   */
+  void                      scrollByPages(long numPages, optional ScrollOptions options);
+
+  /**
+   * Method for sizing this window to the content in the window.
+   */
+  [Throws, UnsafeInPrerendering] void             sizeToContent();
+
+  // XXX Shouldn't this be in nsIDOMChromeWindow?
+  [ChromeOnly, Replaceable, Throws] readonly attribute MozControllers controllers;
+
+  [ChromeOnly, Throws] readonly attribute Element? realFrameElement;
+
+  [Throws, NeedsCallerType]
+  readonly attribute float mozInnerScreenX;
+  [Throws, NeedsCallerType]
+  readonly attribute float mozInnerScreenY;
+  [Replaceable, Throws, NeedsCallerType]
+  readonly attribute float devicePixelRatio;
+
+  /* The maximum offset that the window can be scrolled to
+     (i.e., the document width/height minus the scrollport width/height) */
+  [ChromeOnly, Throws]  readonly attribute long   scrollMinX;
+  [ChromeOnly, Throws]  readonly attribute long   scrollMinY;
+  [Replaceable, Throws] readonly attribute long   scrollMaxX;
+  [Replaceable, Throws] readonly attribute long   scrollMaxY;
+
+  [Throws, UnsafeInPrerendering] attribute boolean            fullScreen;
+
+  [Throws, ChromeOnly, UnsafeInPrerendering] void             back();
+  [Throws, ChromeOnly, UnsafeInPrerendering] void             forward();
+  [Throws, ChromeOnly, UnsafeInPrerendering] void             home();
+
+  // XXX Should this be in nsIDOMChromeWindow?
+  void                      updateCommands(DOMString action,
+                                           optional Selection? sel = null,
+                                           optional short reason = 0);
+
+  /* Find in page.
+   * @param str: the search pattern
+   * @param caseSensitive: is the search caseSensitive
+   * @param backwards: should we search backwards
+   * @param wrapAround: should we wrap the search
+   * @param wholeWord: should we search only for whole words
+   * @param searchInFrames: should we search through all frames
+   * @param showDialog: should we show the Find dialog
+   */
+  [Throws, UnsafeInPrerendering] boolean    find(optional DOMString str = "",
+                                                 optional boolean caseSensitive = false,
+                                                 optional boolean backwards = false,
+                                                 optional boolean wrapAround = false,
+                                                 optional boolean wholeWord = false,
+                                                 optional boolean searchInFrames = false,
+                                                 optional boolean showDialog = false);
+
+  /**
+   * Returns the number of times this document for this window has
+   * been painted to the screen.
+   */
+  [Throws] readonly attribute unsigned long long mozPaintCount;
+
+  /**
+   * This property exists because static attributes don't yet work for
+   * JS-implemented WebIDL (see bugs 1058606 and 863952). With this hack, we
+   * can use `MozSelfSupport.something(...)`, which will continue to work
+   * after we ditch this property and switch to static attributes. See
+   */
+  [ChromeOnly, Throws] readonly attribute MozSelfSupport MozSelfSupport;
+
+  [Pure]
+           attribute EventHandler onwheel;
+
+           attribute EventHandler ondevicemotion;
+           attribute EventHandler ondeviceorientation;
+           attribute EventHandler onabsolutedeviceorientation;
+           attribute EventHandler ondeviceproximity;
+           attribute EventHandler onuserproximity;
+           attribute EventHandler ondevicelight;
+
+  void                      dump(DOMString str);
+
+  /**
+   * This method is here for backwards compatibility with 4.x only,
+   * its implementation is a no-op
+   */
+  void                      setResizable(boolean resizable);
+
+  /**
+   * This is the scriptable version of
+   * nsIDOMWindow::openDialog() that takes 3 optional
+   * arguments, plus any additional arguments are passed on as
+   * arguments on the dialog's window object (window.arguments).
+   */
+  [Throws, ChromeOnly, UnsafeInPrerendering] WindowProxy? openDialog(optional DOMString url = "",
+                                                                   optional DOMString name = "",
+                                                                   optional DOMString options = "",
+                                                                   any... extraArguments);
+
+  [Replaceable, Throws] readonly attribute object? content;
+
+  [ChromeOnly, Throws] readonly attribute object? __content;
+
+  [Throws, ChromeOnly] any getInterface(IID iid);
+
+  /**
+   * Same as nsIDOMWindow.windowRoot, useful for event listener targeting.
+   */
+  [ChromeOnly, Throws]
+  readonly attribute WindowRoot? windowRoot;
+};
+
+Window implements TouchEventHandlers;
+
+Window implements OnErrorEventHandlerForWindow;
+
+#ifdef HAVE_SIDEBAR
+// Mozilla extension
+partial interface Window {
+  [Replaceable, Throws, UseCounter]
+  readonly attribute (External or WindowProxy) sidebar;
+};
+#endif
+
+[Func="IsChromeOrXBL"]
+interface ChromeWindow {
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  const unsigned short STATE_MAXIMIZED = 1;
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  const unsigned short STATE_MINIMIZED = 2;
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  const unsigned short STATE_NORMAL = 3;
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  const unsigned short STATE_FULLSCREEN = 4;
+
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  readonly attribute unsigned short windowState;
+
+  /**
+   * browserDOMWindow provides access to yet another layer of
+   * utility functions implemented by chrome script. It will be null
+   * for DOMWindows not corresponding to browsers.
+   */
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+           attribute nsIBrowserDOMWindow? browserDOMWindow;
+
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  void                      getAttention();
+
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  void                      getAttentionWithCycleCount(long aCycleCount);
+
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  void                      setCursor(DOMString cursor);
+
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow", UnsafeInPrerendering]
+  void                      maximize();
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow", UnsafeInPrerendering]
+  void                      minimize();
+  [Func="nsGlobalWindow::IsPrivilegedChromeWindow", UnsafeInPrerendering]
+  void                      restore();
+
+  /**
+   * Notify a default button is loaded on a dialog or a wizard.
+   * defaultButton is the default button.
+   */
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  void notifyDefaultButtonLoaded(Element defaultButton);
+
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  readonly attribute nsIMessageBroadcaster messageManager;
+
+  /**
+   * Returns the message manager identified by the given group name that
+   * manages all frame loaders belonging to that group.
+   */
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  nsIMessageBroadcaster getGroupMessageManager(DOMString aGroup);
+
+  /**
+   * On some operating systems, we must allow the window manager to
+   * handle window dragging. This function tells the window manager to
+   * start dragging the window. This function will fail unless called
+   * while the left mouse button is held down, callers must check this.
+   *
+   * The optional panel argument should be set when moving a panel.
+   *
+   * Throws NS_ERROR_NOT_IMPLEMENTED if the OS doesn't support this.
+   */
+  [Throws, Func="nsGlobalWindow::IsPrivilegedChromeWindow"]
+  void beginWindowMove(Event mouseDownEvent, optional Element? panel = null);
+};
+
+partial interface Window {
+  [Pref="dom.vr.enabled"]
+  attribute EventHandler onvrdisplayconnect;
+  [Pref="dom.vr.enabled"]
+  attribute EventHandler onvrdisplaydisconnect;
+  [Pref="dom.vr.enabled"]
+  attribute EventHandler onvrdisplaypresentchange;
+};
+
+// For testing worklet only
+partial interface Window {
+  [Pref="dom.worklet.testing.enabled", Throws]
+  Worklet createWorklet();
+};
+
+Window implements ChromeWindow;
+Window implements WindowOrWorkerGlobalScope;
+
+partial interface Window {
+  [Throws, Pref="dom.requestIdleCallback.enabled"]
+  unsigned long requestIdleCallback(IdleRequestCallback callback,
+                                    optional IdleRequestOptions options);
+  [Pref="dom.requestIdleCallback.enabled"]
+  void          cancelIdleCallback(unsigned long handle);
+};
+
+dictionary IdleRequestOptions {
+  unsigned long timeout;
+};
+
+callback IdleRequestCallback = void (IdleDeadline deadline);
+
+/**
+ * Similar to |isSecureContext|, but doesn't pay attention to whether the
+ * window's opener (if any) is a secure context or not.
+ *
+ * WARNING: Do not use this unless you are familiar with the issues that
+ * taking opener state into account is designed to address (or else you may
+ * introduce security issues).  If in doubt, use |isSecureContext|.  In
+ * particular do not use this to gate access to JavaScript APIs.
+ */
+partial interface Window {
+  [ChromeOnly] readonly attribute boolean isSecureContextIfOpenerIgnored;
+};
diff --git a/dom/webidl/WindowOrWorkerGlobalScope.webidl b/dom/webidl/WindowOrWorkerGlobalScope.webidl
new file mode 100644
index 000000000..652a46ffc
--- /dev/null
+++ b/dom/webidl/WindowOrWorkerGlobalScope.webidl
@@ -0,0 +1,85 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope-mixin
+ * https://fetch.spec.whatwg.org/#fetch-method
+ * https://w3c.github.io/webappsec-secure-contexts/#monkey-patching-global-object
+ * https://w3c.github.io/ServiceWorker/#self-caches
+ */
+
+// https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope-mixin
+[NoInterfaceObject, Exposed=(Window,Worker)]
+interface WindowOrWorkerGlobalScope {
+  // .origin on Window or Worker globals
+  [Replaceable] readonly attribute USVString origin;
+
+  // base64 utility methods
+  [Throws]
+  DOMString btoa(DOMString btoa);
+  [Throws]
+  DOMString atob(DOMString atob);
+
+  // timers
+  // NOTE: We're using overloads where the spec uses a union.  Should
+  // be black-box the same.
+  [Throws]
+  long setTimeout(Function handler, optional long timeout = 0, any... arguments);
+  [Throws]
+  long setTimeout(DOMString handler, optional long timeout = 0, any... unused);
+  void clearTimeout(optional long handle = 0);
+  [Throws]
+  long setInterval(Function handler, optional long timeout, any... arguments);
+  [Throws]
+  long setInterval(DOMString handler, optional long timeout, any... unused);
+  void clearInterval(optional long handle = 0);
+
+  // microtask queuing
+  void queueMicrotask(VoidFunction callback);
+
+  // ImageBitmap
+  [Throws]
+  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource aImage);
+  [Throws]
+  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource aImage, long aSx, long aSy, long aSw, long aSh);
+};
+
+// https://fetch.spec.whatwg.org/#fetch-method
+partial interface WindowOrWorkerGlobalScope {
+  [NewObject] Promise<Response> fetch(RequestInfo input, optional RequestInit init);
+};
+
+// https://w3c.github.io/webappsec-secure-contexts/#monkey-patching-global-object
+partial interface WindowOrWorkerGlobalScope {
+  readonly attribute boolean isSecureContext;
+};
+
+// http://w3c.github.io/IndexedDB/#factory-interface
+partial interface WindowOrWorkerGlobalScope {
+   // readonly attribute IDBFactory indexedDB;
+   [Throws]
+   readonly attribute IDBFactory? indexedDB;
+};
+
+// https://w3c.github.io/ServiceWorker/#self-caches
+partial interface WindowOrWorkerGlobalScope {
+  [Throws, Func="mozilla::dom::cache::CacheStorage::PrefEnabled", SameObject]
+  readonly attribute CacheStorage caches;
+};
+
+// Mozilla extensions
+partial interface WindowOrWorkerGlobalScope {
+  // Extensions to ImageBitmap bits.
+  // Bug 1141979 - [FoxEye] Extend ImageBitmap with interfaces to access its
+  // underlying image data
+  //
+  // Note:
+  // Overloaded functions cannot have different "extended attributes",
+  // so I cannot add preference on the extended version of createImageBitmap().
+  // To work around, I will then check the preference at run time and throw if
+  // the preference is set to be false.
+  [Throws]
+  Promise<ImageBitmap> createImageBitmap(ImageBitmapSource aImage, long aOffset, long aLength, ImageBitmapFormat aFormat, ImagePixelLayout aLayout);
+};
diff --git a/dom/webidl/WindowRoot.webidl b/dom/webidl/WindowRoot.webidl
new file mode 100644
index 000000000..0ddb1a9fb
--- /dev/null
+++ b/dom/webidl/WindowRoot.webidl
@@ -0,0 +1,9 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[ChromeOnly]
+interface WindowRoot : EventTarget {
+};
diff --git a/dom/webidl/Worker.webidl b/dom/webidl/Worker.webidl
new file mode 100644
index 000000000..158a502d6
--- /dev/null
+++ b/dom/webidl/Worker.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Constructor(DOMString scriptURL),
+ Func="mozilla::dom::workers::WorkerPrivate::WorkerAvailable",
+ Exposed=(Window,DedicatedWorker,SharedWorker,System)]
+interface Worker : EventTarget {
+  void terminate();
+
+  [Throws]
+  void postMessage(any message, optional sequence<any> transfer);
+
+  attribute EventHandler onmessage;
+};
+
+Worker implements AbstractWorker;
+
+[Constructor(DOMString scriptURL),
+ Func="mozilla::dom::workers::ChromeWorkerPrivate::WorkerAvailable",
+ Exposed=(Window,DedicatedWorker,SharedWorker,System)]
+interface ChromeWorker : Worker {
+};
diff --git a/dom/webidl/WorkerDebuggerGlobalScope.webidl b/dom/webidl/WorkerDebuggerGlobalScope.webidl
new file mode 100644
index 000000000..16850589a
--- /dev/null
+++ b/dom/webidl/WorkerDebuggerGlobalScope.webidl
@@ -0,0 +1,40 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+[Global=(WorkerDebugger), Exposed=WorkerDebugger]
+interface WorkerDebuggerGlobalScope : EventTarget {
+  [Throws]
+  readonly attribute object global;
+
+  [Throws]
+  object createSandbox(DOMString name, object prototype);
+
+  [Throws]
+  void loadSubScript(DOMString url, optional object sandbox);
+
+  void enterEventLoop();
+
+  void leaveEventLoop();
+
+  void postMessage(DOMString message);
+
+  attribute EventHandler onmessage;
+
+  [Throws]
+  void setImmediate(Function handler);
+
+  void reportError(DOMString message);
+
+  [Throws]
+  sequence<any> retrieveConsoleEvents();
+
+  [Throws]
+  void setConsoleEventHandler(AnyCallback? handler);
+};
+
+// So you can debug while you debug
+partial interface WorkerDebuggerGlobalScope {
+  void dump(optional DOMString string);
+};
diff --git a/dom/webidl/WorkerGlobalScope.webidl b/dom/webidl/WorkerGlobalScope.webidl
new file mode 100644
index 000000000..25cfe9e29
--- /dev/null
+++ b/dom/webidl/WorkerGlobalScope.webidl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#the-workerglobalscope-common-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Exposed=(Worker)]
+interface WorkerGlobalScope : EventTarget {
+  [Constant, Cached]
+  readonly attribute WorkerGlobalScope self;
+
+  readonly attribute WorkerLocation location;
+
+  [Throws]
+  void close();
+  attribute OnErrorEventHandler onerror;
+
+  attribute EventHandler onoffline;
+  attribute EventHandler ononline;
+  // also has additional members in a partial interface
+};
+
+partial interface WorkerGlobalScope {
+  [Throws]
+  void importScripts(DOMString... urls);
+
+  readonly attribute WorkerNavigator navigator;
+};
+
+WorkerGlobalScope implements GlobalCrypto;
+WorkerGlobalScope implements WindowOrWorkerGlobalScope;
+
+// Not implemented yet: bug 1072107.
+// WorkerGlobalScope implements FontFaceSource;
+
+// Mozilla extensions
+partial interface WorkerGlobalScope {
+
+  void dump(optional DOMString str);
+
+  // XXXbz no spec for this yet, because the webperf WG is a bit dysfunctional
+  [Constant, Cached]
+  readonly attribute Performance performance;
+};
diff --git a/dom/webidl/WorkerLocation.webidl b/dom/webidl/WorkerLocation.webidl
new file mode 100644
index 000000000..23fc478d8
--- /dev/null
+++ b/dom/webidl/WorkerLocation.webidl
@@ -0,0 +1,33 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/html/#worker-locations
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Exposed=Worker]
+interface WorkerLocation {
+  // Bug 824857: no support for stringifier attributes yet.
+  //  stringifier attribute USVString href;
+
+  // Bug 824857 should remove this.
+  stringifier;
+
+  readonly attribute USVString href;
+
+  readonly attribute USVString origin;
+  readonly attribute USVString protocol;
+  readonly attribute USVString host;
+  readonly attribute USVString hostname;
+  readonly attribute USVString port;
+  readonly attribute USVString pathname;
+  readonly attribute USVString search;
+  readonly attribute USVString hash;
+};
diff --git a/dom/webidl/WorkerNavigator.webidl b/dom/webidl/WorkerNavigator.webidl
new file mode 100644
index 000000000..fc3fd603c
--- /dev/null
+++ b/dom/webidl/WorkerNavigator.webidl
@@ -0,0 +1,15 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+[Exposed=Worker]
+interface WorkerNavigator {
+};
+
+WorkerNavigator implements NavigatorID;
+WorkerNavigator implements NavigatorLanguage;
+WorkerNavigator implements NavigatorOnLine;
+WorkerNavigator implements NavigatorConcurrentHardware;
+WorkerNavigator implements NavigatorStorage;
+WorkerNavigator implements NavigatorGlobalPrivacyControl;
diff --git a/dom/webidl/Worklet.webidl b/dom/webidl/Worklet.webidl
new file mode 100644
index 000000000..7f003779f
--- /dev/null
+++ b/dom/webidl/Worklet.webidl
@@ -0,0 +1,14 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://drafts.css-houdini.org/worklets/#idl-index
+ */
+
+[Pref="dom.worklet.enabled"]
+interface Worklet {
+  [NewObject, Throws]
+  Promise<void> import(USVString moduleURL);
+};
diff --git a/dom/webidl/WorkletGlobalScope.webidl b/dom/webidl/WorkletGlobalScope.webidl
new file mode 100644
index 000000000..208ea03fa
--- /dev/null
+++ b/dom/webidl/WorkletGlobalScope.webidl
@@ -0,0 +1,17 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://drafts.css-houdini.org/worklets/#idl-index
+ */
+
+[Global=(Worklet), Exposed=(Worklet)]
+interface WorkletGlobalScope {
+};
+
+// Mozilla extensions
+partial interface WorkletGlobalScope {
+  void dump(optional DOMString str);
+};
diff --git a/dom/webidl/XMLDocument.webidl b/dom/webidl/XMLDocument.webidl
new file mode 100644
index 000000000..0f503c9f5
--- /dev/null
+++ b/dom/webidl/XMLDocument.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * http://dom.spec.whatwg.org/#xmldocument
+ * http://www.whatwg.org/specs/web-apps/current-work/#xmldocument
+ */
+
+// http://dom.spec.whatwg.org/#xmldocument
+interface XMLDocument : Document {};
+
+// http://www.whatwg.org/specs/web-apps/current-work/#xmldocument
+partial interface XMLDocument {
+  [Throws]
+  boolean load(DOMString url);
+};
+
+// Gecko extensions?
+partial interface XMLDocument {
+  attribute boolean async;
+};
diff --git a/dom/webidl/XMLHttpRequest.webidl b/dom/webidl/XMLHttpRequest.webidl
new file mode 100644
index 000000000..fa44c449f
--- /dev/null
+++ b/dom/webidl/XMLHttpRequest.webidl
@@ -0,0 +1,160 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * www.w3.org/TR/2012/WD-XMLHttpRequest-20120117/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface InputStream;
+interface MozChannel;
+interface IID;
+
+enum XMLHttpRequestResponseType {
+  "",
+  "arraybuffer",
+  "blob",
+  "document",
+  "json",
+  "text",
+
+  // Mozilla-specific stuff
+  "moz-chunked-text",
+  "moz-chunked-arraybuffer",
+  "moz-blob"
+};
+
+/**
+ * Parameters for instantiating an XMLHttpRequest. They are passed as an
+ * optional argument to the constructor:
+ *
+ *  new XMLHttpRequest({anon: true, system: true});
+ */
+dictionary MozXMLHttpRequestParameters
+{
+  /**
+   * If true, the request will be sent without cookie and authentication
+   * headers.
+   */
+  boolean mozAnon = false;
+
+  /**
+   * If true, the same origin policy will not be enforced on the request.
+   */
+  boolean mozSystem = false;
+};
+
+[Constructor(optional MozXMLHttpRequestParameters params),
+ // There are apparently callers, specifically CoffeeScript, who do
+ // things like this:
+ //   c = new(window.ActiveXObject || XMLHttpRequest)("Microsoft.XMLHTTP")
+ // To handle that, we need a constructor that takes a string.
+ Constructor(DOMString ignored),
+ Exposed=(Window,DedicatedWorker,SharedWorker)]
+interface XMLHttpRequest : XMLHttpRequestEventTarget {
+  // event handler
+  attribute EventHandler onreadystatechange;
+
+  // states
+  const unsigned short UNSENT = 0;
+  const unsigned short OPENED = 1;
+  const unsigned short HEADERS_RECEIVED = 2;
+  const unsigned short LOADING = 3;
+  const unsigned short DONE = 4;
+
+  readonly attribute unsigned short readyState;
+
+  // request
+  [Throws]
+  void open(ByteString method, DOMString url);
+  [Throws]
+  void open(ByteString method, DOMString url, boolean async,
+            optional DOMString? user=null, optional DOMString? password=null);
+  [Throws]
+  void setRequestHeader(ByteString header, ByteString value);
+
+  [SetterThrows]
+  attribute unsigned long timeout;
+
+  [SetterThrows]
+  attribute boolean withCredentials;
+
+  [Throws]
+  readonly attribute XMLHttpRequestUpload upload;
+
+  [Throws]
+  void send();
+  [Throws]
+  void send(ArrayBuffer data);
+  [Throws]
+  void send(ArrayBufferView data);
+  [Throws]
+  void send(Blob data);
+  [Throws]
+  void send(Document data);
+  [Throws]
+  void send(DOMString? data);
+  [Throws]
+  void send(FormData data);
+  [Throws]
+  void send(InputStream data);
+  [Throws]
+  void send(URLSearchParams data);
+
+  [Throws]
+  void abort();
+
+  // response
+  readonly attribute DOMString responseURL;
+
+  [Throws]
+  readonly attribute unsigned short status;
+
+  [Throws]
+  readonly attribute ByteString statusText;
+
+  [Throws]
+  ByteString? getResponseHeader(ByteString header);
+
+  [Throws]
+  ByteString getAllResponseHeaders();
+
+  [Throws]
+  void overrideMimeType(DOMString mime);
+
+  [SetterThrows]
+  attribute XMLHttpRequestResponseType responseType;
+  [Throws]
+  readonly attribute any response;
+  [Cached, Pure, Throws]
+  readonly attribute DOMString? responseText;
+
+  [Throws, Exposed=Window]
+  readonly attribute Document? responseXML;
+
+  // Mozilla-specific stuff
+
+  [ChromeOnly, SetterThrows]
+  attribute boolean mozBackgroundRequest;
+
+  [ChromeOnly, Exposed=Window]
+  readonly attribute MozChannel? channel;
+
+  // A platform-specific identifer to represent the network interface 
+  // which the HTTP request would occur on.
+  [ChromeOnly, Exposed=Window]
+  attribute ByteString? networkInterfaceId;
+
+  [Throws, ChromeOnly, Exposed=Window]
+  any getInterface(IID iid);
+
+  [ChromeOnly, Exposed=Window]
+  void setOriginAttributes(optional OriginAttributesDictionary originAttributes);
+
+  readonly attribute boolean mozAnon;
+  readonly attribute boolean mozSystem;
+};
diff --git a/dom/webidl/XMLHttpRequestEventTarget.webidl b/dom/webidl/XMLHttpRequestEventTarget.webidl
new file mode 100644
index 000000000..035da04cc
--- /dev/null
+++ b/dom/webidl/XMLHttpRequestEventTarget.webidl
@@ -0,0 +1,29 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * www.w3.org/TR/2012/WD-XMLHttpRequest-20120117/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,DedicatedWorker,SharedWorker)]
+interface XMLHttpRequestEventTarget : EventTarget {
+  // event handlers
+  attribute EventHandler onloadstart;
+
+  attribute EventHandler onprogress;
+
+  attribute EventHandler onabort;
+
+  attribute EventHandler onerror;
+
+  attribute EventHandler onload;
+
+  attribute EventHandler ontimeout;
+
+  attribute EventHandler onloadend;
+};
diff --git a/dom/webidl/XMLHttpRequestUpload.webidl b/dom/webidl/XMLHttpRequestUpload.webidl
new file mode 100644
index 000000000..cbb8728b7
--- /dev/null
+++ b/dom/webidl/XMLHttpRequestUpload.webidl
@@ -0,0 +1,16 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * www.w3.org/TR/2012/WD-XMLHttpRequest-20120117/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,DedicatedWorker,SharedWorker)]
+interface XMLHttpRequestUpload : XMLHttpRequestEventTarget {
+
+};
diff --git a/dom/webidl/XMLSerializer.webidl b/dom/webidl/XMLSerializer.webidl
new file mode 100644
index 000000000..700098e2f
--- /dev/null
+++ b/dom/webidl/XMLSerializer.webidl
@@ -0,0 +1,20 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://domparsing.spec.whatwg.org/#the-xmlserializer-interface
+ */
+
+interface OutputStream;
+
+[Constructor]
+interface XMLSerializer {
+  [Throws]
+  DOMString serializeToString(Node root);
+
+  // Mozilla-specific stuff
+  [Throws, ChromeOnly]
+  void serializeToStream(Node root, OutputStream stream, DOMString? charset);
+};
+
diff --git a/dom/webidl/XMLStylesheetProcessingInstruction.webidl b/dom/webidl/XMLStylesheetProcessingInstruction.webidl
new file mode 100644
index 000000000..ec7d64a0d
--- /dev/null
+++ b/dom/webidl/XMLStylesheetProcessingInstruction.webidl
@@ -0,0 +1,9 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface XMLStylesheetProcessingInstruction : ProcessingInstruction {
+  readonly attribute StyleSheet? sheet;
+};
diff --git a/dom/webidl/XPathEvaluator.webidl b/dom/webidl/XPathEvaluator.webidl
new file mode 100644
index 000000000..a74909f2a
--- /dev/null
+++ b/dom/webidl/XPathEvaluator.webidl
@@ -0,0 +1,19 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Constructor]
+interface XPathEvaluator {
+  // Based on nsIDOMXPathEvaluator
+  [NewObject, Throws]
+  XPathExpression createExpression(DOMString expression,
+                                   XPathNSResolver? resolver);
+  [Pure]
+  Node createNSResolver(Node nodeResolver);
+  [Throws]
+  XPathResult evaluate(DOMString expression, Node contextNode,
+                       XPathNSResolver? resolver, unsigned short type,
+                       object? result);
+};
diff --git a/dom/webidl/XPathExpression.webidl b/dom/webidl/XPathExpression.webidl
new file mode 100644
index 000000000..dd5835492
--- /dev/null
+++ b/dom/webidl/XPathExpression.webidl
@@ -0,0 +1,22 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface XPathExpression {
+  // The result specifies a specific result object which may be reused and
+  // returned by this method. If this is specified as null or it's not an
+  // XPathResult object, a new result object will be constructed and returned.
+  [Throws]
+  XPathResult evaluate(Node contextNode, unsigned short type, object? result);
+
+  // The result specifies a specific result object which may be reused and
+  // returned by this method. If this is specified as null or it's not an
+  // XPathResult object, a new result object will be constructed and returned.
+  [Throws, ChromeOnly]
+  XPathResult evaluateWithContext(Node contextNode,
+                                  unsigned long contextPosition,
+                                  unsigned long contextSize,
+                                  unsigned short type, object? result);
+};
diff --git a/dom/webidl/XPathNSResolver.webidl b/dom/webidl/XPathNSResolver.webidl
new file mode 100644
index 000000000..6309ff38c
--- /dev/null
+++ b/dom/webidl/XPathNSResolver.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+callback interface XPathNSResolver
+{
+  DOMString? lookupNamespaceURI(DOMString? prefix);
+};
diff --git a/dom/webidl/XPathResult.webidl b/dom/webidl/XPathResult.webidl
new file mode 100644
index 000000000..d50063771
--- /dev/null
+++ b/dom/webidl/XPathResult.webidl
@@ -0,0 +1,38 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Corresponds to http://www.w3.org/TR/2002/WD-DOM-Level-3-XPath-20020208
+ */
+
+interface XPathResult {
+  // XPathResultType
+  const unsigned short ANY_TYPE = 0;
+  const unsigned short NUMBER_TYPE = 1;
+  const unsigned short STRING_TYPE = 2;
+  const unsigned short BOOLEAN_TYPE = 3;
+  const unsigned short UNORDERED_NODE_ITERATOR_TYPE = 4;
+  const unsigned short ORDERED_NODE_ITERATOR_TYPE = 5;
+  const unsigned short UNORDERED_NODE_SNAPSHOT_TYPE = 6;
+  const unsigned short ORDERED_NODE_SNAPSHOT_TYPE = 7;
+  const unsigned short ANY_UNORDERED_NODE_TYPE = 8;
+  const unsigned short FIRST_ORDERED_NODE_TYPE = 9;
+
+  readonly attribute unsigned short resultType;
+  [Throws]
+  readonly attribute double numberValue;
+  [Throws]
+  readonly attribute DOMString stringValue;
+  [Throws]
+  readonly attribute boolean booleanValue;
+  [Throws]
+  readonly attribute Node? singleNodeValue;
+  readonly attribute boolean invalidIteratorState;
+  [Throws]
+  readonly attribute unsigned long snapshotLength;
+  [Throws]
+  Node? iterateNext();
+  [Throws]
+  Node? snapshotItem(unsigned long index);
+};
diff --git a/dom/webidl/XSLTProcessor.webidl b/dom/webidl/XSLTProcessor.webidl
new file mode 100644
index 000000000..276e1b3fa
--- /dev/null
+++ b/dom/webidl/XSLTProcessor.webidl
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+interface nsIVariant;
+
+[Constructor]
+interface XSLTProcessor {
+    /**
+     * Import the stylesheet into this XSLTProcessor for transformations.
+     *
+     * @param style The root-node of a XSLT stylesheet. This can be either
+     *              a document node or an element node. If a document node
+     *              then the document can contain either a XSLT stylesheet
+     *              or a LRE stylesheet.
+     *              If the argument is an element node it must be the
+     *              xsl:stylesheet (or xsl:transform) element of an XSLT
+     *              stylesheet.
+     */
+    [Throws]
+    void importStylesheet(Node style);
+
+    /**
+     * Transforms the node source applying the stylesheet given by
+     * the importStylesheet() function. The owner document of the output node
+     * owns the returned document fragment.
+     *
+     * @param source The node to be transformed
+     * @param output This document is used to generate the output
+     * @return DocumentFragment The result of the transformation
+     */
+    [CEReactions, Throws]
+    DocumentFragment transformToFragment(Node source,
+                                         Document output);
+
+    /**
+     * Transforms the node source applying the stylesheet given by the
+     * importStylesheet() function.
+     *
+     * @param source The node to be transformed
+     * @return Document The result of the transformation
+     */
+    [CEReactions, Throws]
+    Document transformToDocument(Node source);
+
+    /**
+     * Sets a parameter to be used in subsequent transformations with this
+     * nsIXSLTProcessor. If the parameter doesn't exist in the stylesheet the
+     * parameter will be ignored.
+     *
+     * @param namespaceURI The namespaceURI of the XSLT parameter
+     * @param localName    The local name of the XSLT parameter
+     * @param value        The new value of the XSLT parameter
+     */
+    [Throws]
+    void setParameter([TreatNullAs=EmptyString] DOMString namespaceURI,
+                      DOMString localName,
+                      any value);
+
+    /**
+     * Gets a parameter if previously set by setParameter. Returns null
+     * otherwise.
+     *
+     * @param namespaceURI The namespaceURI of the XSLT parameter
+     * @param localName    The local name of the XSLT parameter
+     * @return nsIVariant  The value of the XSLT parameter
+     */
+    [Throws]
+    nsIVariant? getParameter([TreatNullAs=EmptyString] DOMString namespaceURI,
+                             DOMString localName);
+    /**
+     * Removes a parameter, if set. This will make the processor use the
+     * default-value for the parameter as specified in the stylesheet.
+     *
+     * @param namespaceURI The namespaceURI of the XSLT parameter
+     * @param localName    The local name of the XSLT parameter
+     */
+    [Throws]
+    void removeParameter([TreatNullAs=EmptyString] DOMString namespaceURI,
+                         DOMString localName);
+
+    /**
+     * Removes all set parameters from this nsIXSLTProcessor. This will make
+     * the processor use the default-value for all parameters as specified in
+     * the stylesheet.
+     */
+    void clearParameters();
+
+    /**
+     * Remove all parameters and stylesheets from this nsIXSLTProcessor.
+     */
+    void reset();
+
+    /**
+    * Disables all loading of external documents, such as from
+    * <xsl:import> and document()
+    * Defaults to off and is *not* reset by calls to reset()
+    */
+    [ChromeOnly]
+    const unsigned long DISABLE_ALL_LOADS = 1;
+
+    /**
+    * Flags for this processor. Defaults to 0. See individual flags above
+    * for documentation for effect of reset()
+    */
+    [ChromeOnly]
+    attribute unsigned long flags;
+};
diff --git a/dom/webidl/XULCommandEvent.webidl b/dom/webidl/XULCommandEvent.webidl
new file mode 100644
index 000000000..72dc3802e
--- /dev/null
+++ b/dom/webidl/XULCommandEvent.webidl
@@ -0,0 +1,27 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Func="IsChromeOrXBL"]
+interface XULCommandEvent : UIEvent
+{
+  readonly attribute boolean ctrlKey;
+  readonly attribute boolean shiftKey;
+  readonly attribute boolean altKey;
+  readonly attribute boolean metaKey;
+
+  readonly attribute Event? sourceEvent;
+
+  void initCommandEvent(DOMString type,
+                        optional boolean canBubble = false,
+                        optional boolean cancelable = false,
+                        optional Window? view = null,
+                        optional long detail = 0,
+                        optional boolean ctrlKey = false,
+                        optional boolean altKey = false,
+                        optional boolean shiftKey = false,
+                        optional boolean metaKey = false,
+                        optional Event? sourceEvent = null);
+};
diff --git a/dom/webidl/XULDocument.webidl b/dom/webidl/XULDocument.webidl
new file mode 100644
index 000000000..c974733f6
--- /dev/null
+++ b/dom/webidl/XULDocument.webidl
@@ -0,0 +1,57 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is:
+ * dom/interfaces/xul/nsIDOMXULDocument.idl
+ */
+
+interface XULCommandDispatcher;
+interface MozObserver;
+
+[Func="IsChromeOrXBL"]
+interface XULDocument : Document {
+           attribute Node? popupNode;
+
+  /**
+   * These attributes correspond to trustedGetPopupNode().rangeOffset and
+   * rangeParent. They will help you find where in the DOM the popup is
+   * happening. Can be accessed only during a popup event. Accessing any other
+   * time will be an error.
+   */
+  [Throws, ChromeOnly]
+  readonly attribute Node? popupRangeParent;
+  [Throws, ChromeOnly]
+  readonly attribute long  popupRangeOffset;
+
+           attribute Node? tooltipNode;
+
+  readonly attribute XULCommandDispatcher? commandDispatcher;
+
+  [Throws]
+  readonly attribute long width;
+  [Throws]
+  readonly attribute long height;
+
+  NodeList getElementsByAttribute(DOMString name,
+                                  [TreatNullAs=EmptyString] DOMString value);
+  [Throws]
+  NodeList getElementsByAttributeNS(DOMString? namespaceURI, DOMString name,
+                                    [TreatNullAs=EmptyString] DOMString value);
+
+  [Throws]
+  void addBroadcastListenerFor(Element broadcaster, Element observer,
+                               DOMString attr);
+  void removeBroadcastListenerFor(Element broadcaster, Element observer,
+                                  DOMString attr);
+
+  [Throws]
+  void persist([TreatNullAs=EmptyString] DOMString id, DOMString attr);
+
+  [Throws]
+  BoxObject? getBoxObjectFor(Element? element);
+
+  [Throws]
+  void loadOverlay(DOMString url, MozObserver? observer);
+};
diff --git a/dom/webidl/XULElement.webidl b/dom/webidl/XULElement.webidl
new file mode 100644
index 000000000..28c79b9a7
--- /dev/null
+++ b/dom/webidl/XULElement.webidl
@@ -0,0 +1,141 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+interface MozControllers;
+interface MozFrameLoader;
+interface MozRDFCompositeDataSource;
+interface MozRDFResource;
+interface MozXULTemplateBuilder;
+
+[Func="IsChromeOrXBL"]
+interface XULElement : Element {
+  [SetterThrows]
+  attribute DOMString className;
+
+  // Layout properties
+  [SetterThrows]
+  attribute DOMString align;
+  [SetterThrows]
+  attribute DOMString dir;
+  [SetterThrows]
+  attribute DOMString flex;
+  [SetterThrows]
+  attribute DOMString flexGroup;
+  [SetterThrows]
+  attribute DOMString ordinal;
+  [SetterThrows]
+  attribute DOMString orient;
+  [SetterThrows]
+  attribute DOMString pack;
+
+  // Properties for hiding elements.
+  attribute boolean hidden;
+  attribute boolean collapsed;
+
+  // Property for hooking up to broadcasters
+  [SetterThrows]
+  attribute DOMString observes;
+
+  // Properties for hooking up to popups
+  [SetterThrows]
+  attribute DOMString menu;
+  [SetterThrows]
+  attribute DOMString contextMenu;
+  [SetterThrows]
+  attribute DOMString tooltip;
+
+  // Width/height properties
+  [SetterThrows]
+  attribute DOMString width;
+  [SetterThrows]
+  attribute DOMString height;
+  [SetterThrows]
+  attribute DOMString minWidth;
+  [SetterThrows]
+  attribute DOMString minHeight;
+  [SetterThrows]
+  attribute DOMString maxWidth;
+  [SetterThrows]
+  attribute DOMString maxHeight;
+
+  // Persistence
+  [SetterThrows]
+  attribute DOMString persist;
+
+  // Position properties for
+  // * popups - these are screen coordinates
+  // * other elements - these are client coordinates relative to parent stack.
+  [SetterThrows]
+  attribute DOMString left;
+  [SetterThrows]
+  attribute DOMString top;
+
+  // XUL Template Builder
+  [SetterThrows]
+  attribute DOMString datasources;
+  [SetterThrows]
+  attribute DOMString ref;
+
+  // Tooltip and status info
+  [SetterThrows]
+  attribute DOMString tooltipText;
+  [SetterThrows]
+  attribute DOMString statusText;
+
+  attribute boolean allowEvents;
+
+  readonly attribute MozRDFCompositeDataSource? database;
+  readonly attribute MozXULTemplateBuilder?     builder;
+  [Throws]
+  readonly attribute MozRDFResource?            resource;
+  [Throws]
+  readonly attribute MozControllers             controllers;
+  [Throws]
+  readonly attribute BoxObject?                 boxObject;
+
+  [Throws]
+  void                      focus();
+  [Throws]
+  void                      blur();
+  [Throws]
+  void                      click();
+  void                      doCommand();
+
+  // XXXbz this isn't really a nodelist!  See bug 818548
+  NodeList            getElementsByAttribute(DOMString name,
+                                             DOMString value);
+  // XXXbz this isn't really a nodelist!  See bug 818548
+  [Throws]
+  NodeList            getElementsByAttributeNS(DOMString namespaceURI,
+                                               DOMString name,
+                                               DOMString value);
+  [Constant]
+  readonly attribute CSSStyleDeclaration style;
+};
+
+// And the things from nsIFrameLoaderOwner
+[NoInterfaceObject]
+interface MozFrameLoaderOwner {
+  [ChromeOnly]
+  readonly attribute MozFrameLoader? frameLoader;
+
+  [ChromeOnly]
+  void setIsPrerendered();
+
+  [ChromeOnly, Throws]
+  void presetOpenerWindow(WindowProxy? window);
+
+  [ChromeOnly, Throws]
+  void swapFrameLoaders(XULElement aOtherLoaderOwner);
+
+  [ChromeOnly, Throws]
+  void swapFrameLoaders(HTMLIFrameElement aOtherLoaderOwner);
+};
+
+XULElement implements GlobalEventHandlers;
+XULElement implements TouchEventHandlers;
+XULElement implements MozFrameLoaderOwner;
+XULElement implements OnErrorEventHandlerForNodes;
diff --git a/dom/webidl/moz.build b/dom/webidl/moz.build
new file mode 100644
index 000000000..fca26152b
--- /dev/null
+++ b/dom/webidl/moz.build
@@ -0,0 +1,697 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+GENERATED_WEBIDL_FILES = [
+    'CSS2Properties.webidl',
+]
+
+PREPROCESSED_WEBIDL_FILES = [
+    'HTMLMediaElement.webidl',
+    'Navigator.webidl',
+    'Node.webidl',
+    'Performance.webidl',
+    'Window.webidl',
+]
+
+WEBIDL_FILES = [
+    'AbortController.webidl',
+    'AbortSignal.webidl',
+    'AbstractWorker.webidl',
+    'AnalyserNode.webidl',
+    'Animatable.webidl',
+    'Animation.webidl',
+    'AnimationEffectReadOnly.webidl',
+    'AnimationEffectTiming.webidl',
+    'AnimationEffectTimingReadOnly.webidl',
+    'AnimationEvent.webidl',
+    'AnimationTimeline.webidl',
+    'AnonymousContent.webidl',
+    'AppInfo.webidl',
+    'AppNotificationServiceOptions.webidl',
+    'APZTestData.webidl',
+    'Attr.webidl',
+    'AudioBuffer.webidl',
+    'AudioBufferSourceNode.webidl',
+    'AudioChannel.webidl',
+    'AudioContext.webidl',
+    'AudioDestinationNode.webidl',
+    'AudioListener.webidl',
+    'AudioNode.webidl',
+    'AudioParam.webidl',
+    'AudioProcessingEvent.webidl',
+    'AudioStreamTrack.webidl',
+    'AudioTrack.webidl',
+    'AudioTrackList.webidl',
+    'AutocompleteInfo.webidl',
+    'BarProp.webidl',
+    'BaseKeyframeTypes.webidl',
+    'BeforeAfterKeyboardEvent.webidl',
+    'BeforeUnloadEvent.webidl',
+    'BiquadFilterNode.webidl',
+    'Blob.webidl',
+    'BoxObject.webidl',
+    'BroadcastChannel.webidl',
+    'BrowserElement.webidl',
+    'BrowserElementAudioChannel.webidl',
+    'BrowserElementDictionaries.webidl',
+    'BrowserElementProxy.webidl',
+    'Cache.webidl',
+    'CacheStorage.webidl',
+    'CanvasCaptureMediaStream.webidl',
+    'CanvasRenderingContext2D.webidl',
+    'CaretPosition.webidl',
+    'CDATASection.webidl',
+    'ChannelMergerNode.webidl',
+    'ChannelSplitterNode.webidl',
+    'CharacterData.webidl',
+    'CheckerboardReportService.webidl',
+    'ChildNode.webidl',
+    'ChromeNodeList.webidl',
+    'ChromeUtils.webidl',
+    'Client.webidl',
+    'Clients.webidl',
+    'ClipboardEvent.webidl',
+    'CommandEvent.webidl',
+    'Comment.webidl',
+    'CompositionEvent.webidl',
+    'Console.webidl',
+    'ConstantSourceNode.webidl',
+    'ContainerBoxObject.webidl',
+    'ConvolverNode.webidl',
+    'Coordinates.webidl',
+    'CreateOfferRequest.webidl',
+    'Crypto.webidl',
+    'CSPDictionaries.webidl',
+    'CSPReport.webidl',
+    'CSS.webidl',
+    'CSSAnimation.webidl',
+    'CSSLexer.webidl',
+    'CSSPrimitiveValue.webidl',
+    'CSSPseudoElement.webidl',
+    'CSSRuleList.webidl',
+    'CSSStyleDeclaration.webidl',
+    'CSSStyleSheet.webidl',
+    'CSSTransition.webidl',
+    'CSSValue.webidl',
+    'CSSValueList.webidl',
+    'CustomElementRegistry.webidl',
+    'DataContainerEvent.webidl',
+    'DataTransfer.webidl',
+    'DataTransferItem.webidl',
+    'DataTransferItemList.webidl',
+    'DecoderDoctorNotification.webidl',
+    'DedicatedWorkerGlobalScope.webidl',
+    'DelayNode.webidl',
+    'DesktopNotification.webidl',
+    'DeviceMotionEvent.webidl',
+    'Directory.webidl',
+    'Document.webidl',
+    'DocumentFragment.webidl',
+    'DocumentOrShadowRoot.webidl',
+    'DocumentTimeline.webidl',
+    'DocumentType.webidl',
+    'DOMCursor.webidl',
+    'DOMError.webidl',
+    'DOMException.webidl',
+    'DOMImplementation.webidl',
+    'DominatorTree.webidl',
+    'DOMMatrix.webidl',
+    'DOMParser.webidl',
+    'DOMPoint.webidl',
+    'DOMQuad.webidl',
+    'DOMRect.webidl',
+    'DOMRectList.webidl',
+    'DOMRequest.webidl',
+    'DOMStringList.webidl',
+    'DOMStringMap.webidl',
+    'DOMTokenList.webidl',
+    'Downloads.webidl',
+    'DragEvent.webidl',
+    'DynamicsCompressorNode.webidl',
+    'Element.webidl',
+    'Event.webidl',
+    'EventHandler.webidl',
+    'EventListener.webidl',
+    'EventSource.webidl',
+    'EventTarget.webidl',
+    'ExtendableEvent.webidl',
+    'ExtendableMessageEvent.webidl',
+    'FakePluginTagInit.webidl',
+    'Fetch.webidl',
+    'FetchEvent.webidl',
+    'FetchObserver.webidl',
+    'File.webidl',
+    'FileList.webidl',
+    'FileMode.webidl',
+    'FileReader.webidl',
+    'FileReaderSync.webidl',
+    'FileSystem.webidl',
+    'FileSystemDirectoryEntry.webidl',
+    'FileSystemDirectoryReader.webidl',
+    'FileSystemEntry.webidl',
+    'FileSystemFileEntry.webidl',
+    'FocusEvent.webidl',
+    'FontFace.webidl',
+    'FontFaceSet.webidl',
+    'FontFaceSource.webidl',
+    'FormData.webidl',
+    'Function.webidl',
+    'GainNode.webidl',
+    'Geolocation.webidl',
+    'GeometryUtils.webidl',
+    'GetUserMediaRequest.webidl',
+    'Grid.webidl',
+    'Headers.webidl',
+    'HeapSnapshot.webidl',
+    'History.webidl',
+    'HTMLAllCollection.webidl',
+    'HTMLAnchorElement.webidl',
+    'HTMLAppletElement.webidl',
+    'HTMLAreaElement.webidl',
+    'HTMLAudioElement.webidl',
+    'HTMLBaseElement.webidl',
+    'HTMLBodyElement.webidl',
+    'HTMLBRElement.webidl',
+    'HTMLButtonElement.webidl',
+    'HTMLCanvasElement.webidl',
+    'HTMLCollection.webidl',
+    'HTMLDataElement.webidl',
+    'HTMLDataListElement.webidl',
+    'HTMLDetailsElement.webidl',
+    'HTMLDialogElement.webidl',
+    'HTMLDirectoryElement.webidl',
+    'HTMLDivElement.webidl',
+    'HTMLDListElement.webidl',
+    'HTMLDocument.webidl',
+    'HTMLElement.webidl',
+    'HTMLEmbedElement.webidl',
+    'HTMLFieldSetElement.webidl',
+    'HTMLFontElement.webidl',
+    'HTMLFormControlsCollection.webidl',
+    'HTMLFormElement.webidl',
+    'HTMLFrameElement.webidl',
+    'HTMLFrameSetElement.webidl',
+    'HTMLHeadElement.webidl',
+    'HTMLHeadingElement.webidl',
+    'HTMLHRElement.webidl',
+    'HTMLHtmlElement.webidl',
+    'HTMLHyperlinkElementUtils.webidl',
+    'HTMLIFrameElement.webidl',
+    'HTMLImageElement.webidl',
+    'HTMLInputElement.webidl',
+    'HTMLLabelElement.webidl',
+    'HTMLLegendElement.webidl',
+    'HTMLLIElement.webidl',
+    'HTMLLinkElement.webidl',
+    'HTMLMapElement.webidl',
+    'HTMLMenuElement.webidl',
+    'HTMLMenuItemElement.webidl',
+    'HTMLMetaElement.webidl',
+    'HTMLMeterElement.webidl',
+    'HTMLModElement.webidl',
+    'HTMLObjectElement.webidl',
+    'HTMLOListElement.webidl',
+    'HTMLOptGroupElement.webidl',
+    'HTMLOptionElement.webidl',
+    'HTMLOptionsCollection.webidl',
+    'HTMLOutputElement.webidl',
+    'HTMLParagraphElement.webidl',
+    'HTMLParamElement.webidl',
+    'HTMLPictureElement.webidl',
+    'HTMLPreElement.webidl',
+    'HTMLProgressElement.webidl',
+    'HTMLQuoteElement.webidl',
+    'HTMLScriptElement.webidl',
+    'HTMLSelectElement.webidl',
+    'HTMLSlotElement.webidl',
+    'HTMLSourceElement.webidl',
+    'HTMLSpanElement.webidl',
+    'HTMLStyleElement.webidl',
+    'HTMLTableCaptionElement.webidl',
+    'HTMLTableCellElement.webidl',
+    'HTMLTableColElement.webidl',
+    'HTMLTableElement.webidl',
+    'HTMLTableRowElement.webidl',
+    'HTMLTableSectionElement.webidl',
+    'HTMLTemplateElement.webidl',
+    'HTMLTextAreaElement.webidl',
+    'HTMLTimeElement.webidl',
+    'HTMLTitleElement.webidl',
+    'HTMLTrackElement.webidl',
+    'HTMLUListElement.webidl',
+    'HTMLVideoElement.webidl',
+    'IDBCursor.webidl',
+    'IDBDatabase.webidl',
+    'IDBFactory.webidl',
+    'IDBFileHandle.webidl',
+    'IDBFileRequest.webidl',
+    'IDBIndex.webidl',
+    'IDBKeyRange.webidl',
+    'IDBMutableFile.webidl',
+    'IDBObjectStore.webidl',
+    'IDBOpenDBRequest.webidl',
+    'IDBRequest.webidl',
+    'IDBTransaction.webidl',
+    'IDBVersionChangeEvent.webidl',
+    'IdleDeadline.webidl',
+    'IIRFilterNode.webidl',
+    'ImageBitmap.webidl',
+    'ImageBitmapRenderingContext.webidl',
+    'ImageCapture.webidl',
+    'ImageData.webidl',
+    'ImageDocument.webidl',
+    'InputEvent.webidl',
+    'InputMethod.webidl',
+    'InspectorUtils.webidl',
+    'IntersectionObserver.webidl',
+    'IterableIterator.webidl',
+    'KeyAlgorithm.webidl',
+    'KeyboardEvent.webidl',
+    'KeyEvent.webidl',
+    'KeyframeAnimationOptions.webidl',
+    'KeyframeEffect.webidl',
+    'KeyIdsInitData.webidl',
+    'LegacyQueryInterface.webidl',
+    'LinkStyle.webidl',
+    'ListBoxObject.webidl',
+    'LocalMediaStream.webidl',
+    'Location.webidl',
+    'MediaDeviceInfo.webidl',
+    'MediaDevices.webidl',
+    'MediaElementAudioSourceNode.webidl',
+    'MediaError.webidl',
+    'MediaList.webidl',
+    'MediaQueryList.webidl',
+    'MediaRecorder.webidl',
+    'MediaSource.webidl',
+    'MediaStream.webidl',
+    'MediaStreamAudioDestinationNode.webidl',
+    'MediaStreamAudioSourceNode.webidl',
+    'MediaStreamError.webidl',
+    'MediaStreamTrack.webidl',
+    'MediaTrackConstraintSet.webidl',
+    'MediaTrackSettings.webidl',
+    'MediaTrackSupportedConstraints.webidl',
+    'MenuBoxObject.webidl',
+    'MessageChannel.webidl',
+    'MessageEvent.webidl',
+    'MessagePort.webidl',
+    'MimeType.webidl',
+    'MimeTypeArray.webidl',
+    'MouseEvent.webidl',
+    'MouseScrollEvent.webidl',
+    'MozPowerManager.webidl',
+    'MozSelfSupport.webidl',
+    'MozTetheringManager.webidl',
+    'MozTimeManager.webidl',
+    'MozWakeLock.webidl',
+    'MutationEvent.webidl',
+    'MutationObserver.webidl',
+    'NamedNodeMap.webidl',
+    'NativeOSFileInternals.webidl',
+    'NetDashboard.webidl',
+    'NetworkInformation.webidl',
+    'NetworkOptions.webidl',
+    'NodeFilter.webidl',
+    'NodeIterator.webidl',
+    'NodeList.webidl',
+    'Notification.webidl',
+    'NotificationEvent.webidl',
+    'NotifyPaintEvent.webidl',
+    'OfflineAudioCompletionEvent.webidl',
+    'OfflineAudioContext.webidl',
+    'OfflineResourceList.webidl',
+    'OffscreenCanvas.webidl',
+    'OscillatorNode.webidl',
+    'PaintRequest.webidl',
+    'PaintRequestList.webidl',
+    'PannerNode.webidl',
+    'ParentNode.webidl',
+    'PerformanceEntry.webidl',
+    'PerformanceMark.webidl',
+    'PerformanceMeasure.webidl',
+    'PerformanceNavigation.webidl',
+    'PerformanceNavigationTiming.webidl',
+    'PerformanceObserver.webidl',
+    'PerformanceObserverEntryList.webidl',
+    'PerformanceResourceTiming.webidl',
+    'PerformanceTiming.webidl',
+    'PeriodicWave.webidl',
+    'Permissions.webidl',
+    'PermissionSettings.webidl',
+    'PermissionStatus.webidl',
+    'Plugin.webidl',
+    'PluginArray.webidl',
+    'PointerEvent.webidl',
+    'PopupBoxObject.webidl',
+    'Position.webidl',
+    'PositionError.webidl',
+    'ProcessingInstruction.webidl',
+    'ProfileTimelineMarker.webidl',
+    'Promise.webidl',
+    'PromiseDebugging.webidl',
+    'PushEvent.webidl',
+    'PushManager.webidl',
+    'PushManager.webidl',
+    'PushMessageData.webidl',
+    'PushSubscription.webidl',
+    'PushSubscriptionOptions.webidl',
+    'RadioNodeList.webidl',
+    'Range.webidl',
+    'Rect.webidl',
+    'Request.webidl',
+    'ResizeObserver.webidl',
+    'Response.webidl',
+    'RGBColor.webidl',
+    'RTCStatsReport.webidl',
+    'Screen.webidl',
+    'ScreenOrientation.webidl',
+    'ScriptProcessorNode.webidl',
+    'ScrollAreaEvent.webidl',
+    'ScrollBoxObject.webidl',
+    'Selection.webidl',
+    'ServiceWorker.webidl',
+    'ServiceWorkerContainer.webidl',
+    'ServiceWorkerGlobalScope.webidl',
+    'ServiceWorkerRegistration.webidl',
+    'SettingChangeNotification.webidl',
+    'SettingsManager.webidl',
+    'ShadowRoot.webidl',
+    'SharedWorker.webidl',
+    'SharedWorkerGlobalScope.webidl',
+    'SimpleGestureEvent.webidl',
+    'SocketCommon.webidl',
+    'SourceBuffer.webidl',
+    'SourceBufferList.webidl',
+    'StereoPannerNode.webidl',
+    'Storage.webidl',
+    'StorageEvent.webidl',
+    'StorageManager.webidl',
+    'StorageType.webidl',
+    'StyleSheet.webidl',
+    'StyleSheetList.webidl',
+    'SubtleCrypto.webidl',
+    'SVGAElement.webidl',
+    'SVGAngle.webidl',
+    'SVGAnimatedAngle.webidl',
+    'SVGAnimatedBoolean.webidl',
+    'SVGAnimatedEnumeration.webidl',
+    'SVGAnimatedInteger.webidl',
+    'SVGAnimatedLength.webidl',
+    'SVGAnimatedLengthList.webidl',
+    'SVGAnimatedNumber.webidl',
+    'SVGAnimatedNumberList.webidl',
+    'SVGAnimatedPathData.webidl',
+    'SVGAnimatedPoints.webidl',
+    'SVGAnimatedPreserveAspectRatio.webidl',
+    'SVGAnimatedRect.webidl',
+    'SVGAnimatedString.webidl',
+    'SVGAnimatedTransformList.webidl',
+    'SVGAnimateElement.webidl',
+    'SVGAnimateMotionElement.webidl',
+    'SVGAnimateTransformElement.webidl',
+    'SVGAnimationElement.webidl',
+    'SVGCircleElement.webidl',
+    'SVGClipPathElement.webidl',
+    'SVGComponentTransferFunctionElement.webidl',
+    'SVGDefsElement.webidl',
+    'SVGDescElement.webidl',
+    'SVGElement.webidl',
+    'SVGEllipseElement.webidl',
+    'SVGFEBlendElement.webidl',
+    'SVGFEColorMatrixElement.webidl',
+    'SVGFEComponentTransferElement.webidl',
+    'SVGFECompositeElement.webidl',
+    'SVGFEConvolveMatrixElement.webidl',
+    'SVGFEDiffuseLightingElement.webidl',
+    'SVGFEDisplacementMapElement.webidl',
+    'SVGFEDistantLightElement.webidl',
+    'SVGFEDropShadowElement.webidl',
+    'SVGFEFloodElement.webidl',
+    'SVGFEFuncAElement.webidl',
+    'SVGFEFuncBElement.webidl',
+    'SVGFEFuncGElement.webidl',
+    'SVGFEFuncRElement.webidl',
+    'SVGFEGaussianBlurElement.webidl',
+    'SVGFEImageElement.webidl',
+    'SVGFEMergeElement.webidl',
+    'SVGFEMergeNodeElement.webidl',
+    'SVGFEMorphologyElement.webidl',
+    'SVGFEOffsetElement.webidl',
+    'SVGFEPointLightElement.webidl',
+    'SVGFESpecularLightingElement.webidl',
+    'SVGFESpotLightElement.webidl',
+    'SVGFETileElement.webidl',
+    'SVGFETurbulenceElement.webidl',
+    'SVGFilterElement.webidl',
+    'SVGFilterPrimitiveStandardAttributes.webidl',
+    'SVGFitToViewBox.webidl',
+    'SVGForeignObjectElement.webidl',
+    'SVGGElement.webidl',
+    'SVGGradientElement.webidl',
+    'SVGGraphicsElement.webidl',
+    'SVGImageElement.webidl',
+    'SVGLength.webidl',
+    'SVGLengthList.webidl',
+    'SVGLinearGradientElement.webidl',
+    'SVGLineElement.webidl',
+    'SVGMarkerElement.webidl',
+    'SVGMaskElement.webidl',
+    'SVGMatrix.webidl',
+    'SVGMetadataElement.webidl',
+    'SVGMPathElement.webidl',
+    'SVGNumber.webidl',
+    'SVGNumberList.webidl',
+    'SVGPathElement.webidl',
+    'SVGPathSeg.webidl',
+    'SVGPathSegList.webidl',
+    'SVGPatternElement.webidl',
+    'SVGPoint.webidl',
+    'SVGPointList.webidl',
+    'SVGPolygonElement.webidl',
+    'SVGPolylineElement.webidl',
+    'SVGPreserveAspectRatio.webidl',
+    'SVGRadialGradientElement.webidl',
+    'SVGRect.webidl',
+    'SVGRectElement.webidl',
+    'SVGScriptElement.webidl',
+    'SVGSetElement.webidl',
+    'SVGStopElement.webidl',
+    'SVGStringList.webidl',
+    'SVGStyleElement.webidl',
+    'SVGSVGElement.webidl',
+    'SVGSwitchElement.webidl',
+    'SVGSymbolElement.webidl',
+    'SVGTests.webidl',
+    'SVGTextContentElement.webidl',
+    'SVGTextElement.webidl',
+    'SVGTextPathElement.webidl',
+    'SVGTextPositioningElement.webidl',
+    'SVGTitleElement.webidl',
+    'SVGTransform.webidl',
+    'SVGTransformList.webidl',
+    'SVGTSpanElement.webidl',
+    'SVGUnitTypes.webidl',
+    'SVGUnitTypeValues.webidl',
+    'SVGURIReference.webidl',
+    'SVGUseElement.webidl',
+    'SVGViewElement.webidl',
+    'SVGZoomAndPan.webidl',
+    'SVGZoomAndPanValues.webidl',
+    'SVGZoomEvent.webidl',
+    'SystemUpdate.webidl',
+    'TCPServerSocket.webidl',
+    'TCPServerSocketEvent.webidl',
+    'TCPSocket.webidl',
+    'TCPSocketErrorEvent.webidl',
+    'TCPSocketEvent.webidl',
+    'Text.webidl',
+    'TextClause.webidl',
+    'TextDecoder.webidl',
+    'TextEncoder.webidl',
+    'TextTrack.webidl',
+    'TextTrackCue.webidl',
+    'TextTrackCueList.webidl',
+    'TextTrackList.webidl',
+    'ThreadSafeChromeUtils.webidl',
+    'TimeEvent.webidl',
+    'TimeRanges.webidl',
+    'Touch.webidl',
+    'TouchEvent.webidl',
+    'TouchList.webidl',
+    'TransitionEvent.webidl',
+    'TreeBoxObject.webidl',
+    'TreeColumn.webidl',
+    'TreeColumns.webidl',
+    'TreeWalker.webidl',
+    'U2F.webidl',
+    'UDPMessageEvent.webidl',
+    'UDPSocket.webidl',
+    'UIEvent.webidl',
+    'URL.webidl',
+    'URLSearchParams.webidl',
+    'ValidityState.webidl',
+    'VideoPlaybackQuality.webidl',
+    'VideoStreamTrack.webidl',
+    'VideoTrack.webidl',
+    'VideoTrackList.webidl',
+    'VTTCue.webidl',
+    'VTTRegion.webidl',
+    'WaveShaperNode.webidl',
+    'WebComponents.webidl',
+    'WebGL2RenderingContext.webidl',
+    'WebGLRenderingContext.webidl',
+    'WebKitCSSMatrix.webidl',
+    'WebSocket.webidl',
+    'WheelEvent.webidl',
+    'WifiOptions.webidl',
+    'WindowOrWorkerGlobalScope.webidl',
+    'WindowRoot.webidl',
+    'Worker.webidl',
+    'WorkerDebuggerGlobalScope.webidl',
+    'WorkerGlobalScope.webidl',
+    'WorkerLocation.webidl',
+    'WorkerNavigator.webidl',
+    'Worklet.webidl',
+    'WorkletGlobalScope.webidl',
+    'XMLDocument.webidl',
+    'XMLHttpRequest.webidl',
+    'XMLHttpRequestEventTarget.webidl',
+    'XMLHttpRequestUpload.webidl',
+    'XMLSerializer.webidl',
+    'XMLStylesheetProcessingInstruction.webidl',
+    'XPathEvaluator.webidl',
+    'XPathExpression.webidl',
+    'XPathNSResolver.webidl',
+    'XPathResult.webidl',
+    'XSLTProcessor.webidl',
+    'XULCommandEvent.webidl',
+    'XULDocument.webidl',
+    'XULElement.webidl',
+]
+
+if CONFIG['MOZ_AUDIO_CHANNEL_MANAGER']:
+    WEBIDL_FILES += [
+        'AudioChannelManager.webidl',
+    ]
+
+if CONFIG['MOZ_WEBSPEECH']:
+    WEBIDL_FILES += [
+        'SpeechSynthesis.webidl',
+        'SpeechSynthesisErrorEvent.webidl',
+        'SpeechSynthesisEvent.webidl',
+        'SpeechSynthesisUtterance.webidl',
+        'SpeechSynthesisVoice.webidl',
+    ]
+
+if CONFIG['MOZ_GAMEPAD']:
+    WEBIDL_FILES += [
+        'Gamepad.webidl',
+        'GamepadPose.webidl',
+        'GamepadServiceTest.webidl'
+    ]
+
+WEBIDL_FILES += [
+    'CloseEvent.webidl',
+    'CustomEvent.webidl',
+    'DeviceOrientationEvent.webidl',
+    'HashChangeEvent.webidl',
+    'MozSettingsEvent.webidl',
+    'PageTransitionEvent.webidl',
+    'PopStateEvent.webidl',
+    'PopupBlockedEvent.webidl',
+    'ProgressEvent.webidl',
+    'RecordErrorEvent.webidl',
+    'StyleRuleChangeEvent.webidl',
+    'StyleSheetApplicableStateChangeEvent.webidl',
+    'StyleSheetChangeEvent.webidl',
+]
+
+# We only expose our prefable test interfaces in debug builds, just to be on
+# the safe side.
+if CONFIG['MOZ_DEBUG']:
+    WEBIDL_FILES += [
+         'TestInterfaceJS.webidl',
+         'TestInterfaceJSDictionaries.webidl',
+    ]
+
+if CONFIG['MOZ_SECUREELEMENT']:
+    WEBIDL_FILES += [
+         'SecureElement.webidl',
+         'SecureElementManager.webidl',
+    ]
+
+WEBIDL_FILES += [
+    'InstallTrigger.webidl',
+]
+
+GENERATED_EVENTS_WEBIDL_FILES = [
+    'AnimationPlaybackEvent.webidl',
+    'AutocompleteErrorEvent.webidl',
+    'BlobEvent.webidl',
+    'CaretStateChangedEvent.webidl',
+    'CloseEvent.webidl',
+    'DeviceLightEvent.webidl',
+    'DeviceOrientationEvent.webidl',
+    'DeviceProximityEvent.webidl',
+    'DownloadEvent.webidl',
+    'ErrorEvent.webidl',
+    'FontFaceSetLoadEvent.webidl',
+    'HashChangeEvent.webidl',
+    'HiddenPluginEvent.webidl',
+    'ImageCaptureErrorEvent.webidl',
+    'MediaQueryListEvent.webidl',
+    'MediaStreamEvent.webidl',
+    'MediaStreamTrackEvent.webidl',
+    'MozSettingsEvent.webidl',
+    'MozSettingsTransactionEvent.webidl',
+    'PageTransitionEvent.webidl',
+    'PerformanceEntryEvent.webidl',
+    'PluginCrashedEvent.webidl',
+    'PopStateEvent.webidl',
+    'PopupBlockedEvent.webidl',
+    'ProgressEvent.webidl',
+    'RecordErrorEvent.webidl',
+    'ScrollViewChangeEvent.webidl',
+    'ServiceWorkerMessageEvent.webidl',
+    'StyleRuleChangeEvent.webidl',
+    'StyleSheetApplicableStateChangeEvent.webidl',
+    'StyleSheetChangeEvent.webidl',
+    'TCPServerSocketEvent.webidl',
+    'TCPSocketErrorEvent.webidl',
+    'TCPSocketEvent.webidl',
+    'TrackEvent.webidl',
+    'UDPMessageEvent.webidl',
+    'UserProximityEvent.webidl',
+    'WebGLContextEvent.webidl',
+]
+
+if CONFIG['MOZ_WEBSPEECH']:
+    GENERATED_EVENTS_WEBIDL_FILES += [
+        'SpeechSynthesisErrorEvent.webidl',
+        'SpeechSynthesisEvent.webidl',
+    ]
+
+if CONFIG['MOZ_GAMEPAD']:
+    GENERATED_EVENTS_WEBIDL_FILES += [
+        'GamepadAxisMoveEvent.webidl',
+        'GamepadButtonEvent.webidl',
+        'GamepadEvent.webidl',
+    ]
+
+if CONFIG['MOZ_PHOENIX'] or CONFIG['BINOC_NAVIGATOR']:
+    WEBIDL_FILES += [
+        'BrowserFeedWriter.webidl',
+    ]
+
+if CONFIG['MOZ_PHOENIX']:
+    WEBIDL_FILES += [
+        'External.webidl',
+    ]
+
+if CONFIG['ACCESSIBILITY']:
+    WEBIDL_FILES += [
+        'AccessibleNode.webidl',
+    ]