Recommit working copy to repo with proper line endings.

35 files changed, 5297 insertions, 0 deletions

diff --git a/browser/devtools/scratchpad/CmdScratchpad.jsm b/browser/devtools/scratchpad/CmdScratchpad.jsm
new file mode 100644
index 000000000..74e20d7e0
--- /dev/null
+++ b/browser/devtools/scratchpad/CmdScratchpad.jsm
@@ -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/. */
+
+this.EXPORTED_SYMBOLS = [ ];
+
+Components.utils.import("resource://gre/modules/devtools/gcli.jsm");
+
+/**
+ * 'scratchpad' command
+ */
+gcli.addCommand({
+  name: "scratchpad",
+  buttonId: "command-button-scratchpad",
+  buttonClass: "command-button",
+  tooltipText: gcli.lookup("scratchpadOpenTooltip"),
+  hidden: true,
+  exec: function(args, context) {
+    let chromeWindow = context.environment.chromeDocument.defaultView;
+    chromeWindow.Scratchpad.ScratchpadManager.openScratchpad();
+  }
+});
diff --git a/browser/devtools/scratchpad/Makefile.in b/browser/devtools/scratchpad/Makefile.in
new file mode 100644
index 000000000..8890154f7
--- /dev/null
+++ b/browser/devtools/scratchpad/Makefile.in
@@ -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/.
+
+DEPTH		= @DEPTH@
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH		= @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+include $(topsrcdir)/config/rules.mk
+
+libs::
+	$(NSINSTALL) $(srcdir)/*.jsm $(FINAL_TARGET)/modules/devtools
diff --git a/browser/devtools/scratchpad/moz.build b/browser/devtools/scratchpad/moz.build
new file mode 100644
index 000000000..86ec46748
--- /dev/null
+++ b/browser/devtools/scratchpad/moz.build
@@ -0,0 +1,7 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+TEST_DIRS += ['test']
diff --git a/browser/devtools/scratchpad/scratchpad-manager.jsm b/browser/devtools/scratchpad/scratchpad-manager.jsm
new file mode 100644
index 000000000..c49e642dd
--- /dev/null
+++ b/browser/devtools/scratchpad/scratchpad-manager.jsm
@@ -0,0 +1,166 @@
+/* vim:set ts=2 sw=2 sts=2 et tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["ScratchpadManager"];
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+const SCRATCHPAD_WINDOW_URL = "chrome://browser/content/devtools/scratchpad.xul";
+const SCRATCHPAD_WINDOW_FEATURES = "chrome,titlebar,toolbar,centerscreen,resizable,dialog=no";
+
+Cu.import("resource://gre/modules/Services.jsm");
+
+/**
+ * The ScratchpadManager object opens new Scratchpad windows and manages the state
+ * of open scratchpads for session restore. There's only one ScratchpadManager in
+ * the life of the browser.
+ */
+this.ScratchpadManager = {
+
+  _nextUid: 1,
+  _scratchpads: [],
+
+  /**
+   * Get the saved states of open scratchpad windows. Called by
+   * session restore.
+   *
+   * @return array
+   *         The array of scratchpad states.
+   */
+  getSessionState: function SPM_getSessionState()
+  {
+    return this._scratchpads;
+  },
+
+  /**
+   * Restore scratchpad windows from the scratchpad session store file.
+   * Called by session restore.
+   *
+   * @param function aSession
+   *        The session object with scratchpad states.
+   *
+   * @return array
+   *         The restored scratchpad windows.
+   */
+  restoreSession: function SPM_restoreSession(aSession)
+  {
+    if (!Array.isArray(aSession)) {
+      return [];
+    }
+
+    let wins = [];
+    aSession.forEach(function(state) {
+      let win = this.openScratchpad(state);
+      wins.push(win);
+    }, this);
+
+    return wins;
+  },
+
+  /**
+   * Iterate through open scratchpad windows and save their states.
+   */
+  saveOpenWindows: function SPM_saveOpenWindows() {
+    this._scratchpads = [];
+
+    function clone(src) {
+      let dest = {};
+
+      for (let key in src) {
+        if (src.hasOwnProperty(key)) {
+          dest[key] = src[key];
+        }
+      }
+
+      return dest;
+    }
+
+    // We need to clone objects we get from Scratchpad instances
+    // because such (cross-window) objects have a property 'parent'
+    // that holds on to a ChromeWindow instance. This means that
+    // such objects are not primitive-values-only anymore so they
+    // can leak.
+
+    let enumerator = Services.wm.getEnumerator("devtools:scratchpad");
+    while (enumerator.hasMoreElements()) {
+      let win = enumerator.getNext();
+      if (!win.closed && win.Scratchpad.initialized) {
+        this._scratchpads.push(clone(win.Scratchpad.getState()));
+      }
+    }
+  },
+
+  /**
+   * Open a new scratchpad window with an optional initial state.
+   *
+   * @param object aState
+   *        Optional. The initial state of the scratchpad, an object
+   *        with properties filename, text, and executionContext.
+   *
+   * @return nsIDomWindow
+   *         The opened scratchpad window.
+   */
+  openScratchpad: function SPM_openScratchpad(aState)
+  {
+    let params = Cc["@mozilla.org/embedcomp/dialogparam;1"]
+                 .createInstance(Ci.nsIDialogParamBlock);
+
+    params.SetNumberStrings(2);
+    params.SetString(0, JSON.stringify(this._nextUid++));
+
+    if (aState) {
+      if (typeof aState != 'object') {
+        return;
+      }
+
+      params.SetString(1, JSON.stringify(aState));
+    }
+
+    let win = Services.ww.openWindow(null, SCRATCHPAD_WINDOW_URL, "_blank",
+                                     SCRATCHPAD_WINDOW_FEATURES, params);
+
+    // Only add the shutdown observer if we've opened a scratchpad window.
+    ShutdownObserver.init();
+
+    return win;
+  }
+};
+
+
+/**
+ * The ShutdownObserver listens for app shutdown and saves the current state
+ * of the scratchpads for session restore.
+ */
+var ShutdownObserver = {
+  _initialized: false,
+
+  init: function SDO_init()
+  {
+    if (this._initialized) {
+      return;
+    }
+
+    Services.obs.addObserver(this, "quit-application-granted", false);
+
+    this._initialized = true;
+  },
+
+  observe: function SDO_observe(aMessage, aTopic, aData)
+  {
+    if (aTopic == "quit-application-granted") {
+      ScratchpadManager.saveOpenWindows();
+      this.uninit();
+    }
+  },
+
+  uninit: function SDO_uninit()
+  {
+    Services.obs.removeObserver(this, "quit-application-granted");
+  }
+};
\ No newline at end of file
diff --git a/browser/devtools/scratchpad/scratchpad.js b/browser/devtools/scratchpad/scratchpad.js
new file mode 100644
index 000000000..08a0bc2a5
--- /dev/null
+++ b/browser/devtools/scratchpad/scratchpad.js
@@ -0,0 +1,1650 @@
+/* vim:set ts=2 sw=2 sts=2 et:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Original version history can be found here:
+ * https://github.com/mozilla/workspace
+ *
+ * Copied and relicensed from the Public Domain.
+ * See bug 653934 for details.
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=653934
+ */
+
+"use strict";
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/NetUtil.jsm");
+Cu.import("resource:///modules/source-editor.jsm");
+Cu.import("resource:///modules/devtools/LayoutHelpers.jsm");
+Cu.import("resource:///modules/devtools/scratchpad-manager.jsm");
+Cu.import("resource://gre/modules/jsdebugger.jsm");
+Cu.import("resource:///modules/devtools/gDevTools.jsm");
+Cu.import("resource://gre/modules/osfile.jsm");
+Cu.import("resource://gre/modules/commonjs/sdk/core/promise.js");
+
+XPCOMUtils.defineLazyModuleGetter(this, "VariablesView",
+                                  "resource:///modules/devtools/VariablesView.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "devtools",
+                                  "resource://gre/modules/devtools/Loader.jsm");
+
+let Telemetry = devtools.require("devtools/shared/telemetry");
+
+const SCRATCHPAD_CONTEXT_CONTENT = 1;
+const SCRATCHPAD_CONTEXT_BROWSER = 2;
+const SCRATCHPAD_L10N = "chrome://browser/locale/devtools/scratchpad.properties";
+const DEVTOOLS_CHROME_ENABLED = "devtools.chrome.enabled";
+const PREF_RECENT_FILES_MAX = "devtools.scratchpad.recentFilesMax";
+const BUTTON_POSITION_SAVE = 0;
+const BUTTON_POSITION_CANCEL = 1;
+const BUTTON_POSITION_DONT_SAVE = 2;
+const BUTTON_POSITION_REVERT = 0;
+const VARIABLES_VIEW_URL = "chrome://browser/content/devtools/widgets/VariablesView.xul";
+
+// Because we have no constructor / destructor where we can log metrics we need
+// to do so here.
+let telemetry = new Telemetry();
+telemetry.toolOpened("scratchpad");
+
+/**
+ * The scratchpad object handles the Scratchpad window functionality.
+ */
+var Scratchpad = {
+  _instanceId: null,
+  _initialWindowTitle: document.title,
+
+  /**
+   * Check if provided string is a mode-line and, if it is, return an
+   * object with its values.
+   *
+   * @param string aLine
+   * @return string
+   */
+  _scanModeLine: function SP__scanModeLine(aLine="")
+  {
+    aLine = aLine.trim();
+
+    let obj = {};
+    let ch1 = aLine.charAt(0);
+    let ch2 = aLine.charAt(1);
+
+    if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) {
+      return obj;
+    }
+
+    aLine = aLine
+      .replace(/^\/\//, "")
+      .replace(/^\/\*/, "")
+      .replace(/\*\/$/, "");
+
+    aLine.split(",").forEach(pair => {
+      let [key, val] = pair.split(":");
+
+      if (key && val) {
+        obj[key.trim()] = val.trim();
+      }
+    });
+
+    return obj;
+  },
+
+  /**
+   * The script execution context. This tells Scratchpad in which context the
+   * script shall execute.
+   *
+   * Possible values:
+   *   - SCRATCHPAD_CONTEXT_CONTENT to execute code in the context of the current
+   *   tab content window object.
+   *   - SCRATCHPAD_CONTEXT_BROWSER to execute code in the context of the
+   *   currently active chrome window object.
+   */
+  executionContext: SCRATCHPAD_CONTEXT_CONTENT,
+
+  /**
+   * Tells if this Scratchpad is initialized and ready for use.
+   * @boolean
+   * @see addObserver
+   */
+  initialized: false,
+
+  /**
+   * Retrieve the xul:notificationbox DOM element. It notifies the user when
+   * the current code execution context is SCRATCHPAD_CONTEXT_BROWSER.
+   */
+  get notificationBox() document.getElementById("scratchpad-notificationbox"),
+
+  /**
+   * Get the selected text from the editor.
+   *
+   * @return string
+   *         The selected text.
+   */
+  get selectedText() this.editor.getSelectedText(),
+
+  /**
+   * Get the editor content, in the given range. If no range is given you get
+   * the entire editor content.
+   *
+   * @param number [aStart=0]
+   *        Optional, start from the given offset.
+   * @param number [aEnd=content char count]
+   *        Optional, end offset for the text you want. If this parameter is not
+   *        given, then the text returned goes until the end of the editor
+   *        content.
+   * @return string
+   *         The text in the given range.
+   */
+  getText: function SP_getText(aStart, aEnd)
+  {
+    return this.editor.getText(aStart, aEnd);
+  },
+
+  /**
+   * Replace text in the source editor with the given text, in the given range.
+   *
+   * @param string aText
+   *        The text you want to put into the editor.
+   * @param number [aStart=0]
+   *        Optional, the start offset, zero based, from where you want to start
+   *        replacing text in the editor.
+   * @param number [aEnd=char count]
+   *        Optional, the end offset, zero based, where you want to stop
+   *        replacing text in the editor.
+   */
+  setText: function SP_setText(aText, aStart, aEnd)
+  {
+    this.editor.setText(aText, aStart, aEnd);
+  },
+
+  /**
+   * Set the filename in the scratchpad UI and object
+   *
+   * @param string aFilename
+   *        The new filename
+   */
+  setFilename: function SP_setFilename(aFilename)
+  {
+    this.filename = aFilename;
+    this._updateTitle();
+  },
+
+  /**
+   * Update the Scratchpad window title based on the current state.
+   * @private
+   */
+  _updateTitle: function SP__updateTitle()
+  {
+    let title = this.filename || this._initialWindowTitle;
+
+    if (this.editor && this.editor.dirty) {
+      title = "*" + title;
+    }
+
+    document.title = title;
+  },
+
+  /**
+   * Get the current state of the scratchpad. Called by the
+   * Scratchpad Manager for session storing.
+   *
+   * @return object
+   *        An object with 3 properties: filename, text, and
+   *        executionContext.
+   */
+  getState: function SP_getState()
+  {
+    return {
+      filename: this.filename,
+      text: this.getText(),
+      executionContext: this.executionContext,
+      saved: !this.editor.dirty,
+    };
+  },
+
+  /**
+   * Set the filename and execution context using the given state. Called
+   * when scratchpad is being restored from a previous session.
+   *
+   * @param object aState
+   *        An object with filename and executionContext properties.
+   */
+  setState: function SP_setState(aState)
+  {
+    if (aState.filename) {
+      this.setFilename(aState.filename);
+    }
+    if (this.editor) {
+      this.editor.dirty = !aState.saved;
+    }
+
+    if (aState.executionContext == SCRATCHPAD_CONTEXT_BROWSER) {
+      this.setBrowserContext();
+    }
+    else {
+      this.setContentContext();
+    }
+  },
+
+  /**
+   * Get the most recent chrome window of type navigator:browser.
+   */
+  get browserWindow() Services.wm.getMostRecentWindow("navigator:browser"),
+
+  /**
+   * Reference to the last chrome window of type navigator:browser. We use this
+   * to check if the chrome window changed since the last code evaluation.
+   */
+  _previousWindow: null,
+
+  /**
+   * Get the gBrowser object of the most recent browser window.
+   */
+  get gBrowser()
+  {
+    let recentWin = this.browserWindow;
+    return recentWin ? recentWin.gBrowser : null;
+  },
+
+  /**
+   * Cached Cu.Sandbox object for the active tab content window object.
+   */
+  _contentSandbox: null,
+
+  /**
+   * Unique name for the current Scratchpad instance. Used to distinguish
+   * Scratchpad windows between each other. See bug 661762.
+   */
+  get uniqueName()
+  {
+    return "Scratchpad/" + this._instanceId;
+  },
+
+
+  /**
+   * Sidebar that contains the VariablesView for object inspection.
+   */
+  get sidebar()
+  {
+    if (!this._sidebar) {
+      this._sidebar = new ScratchpadSidebar(this);
+    }
+    return this._sidebar;
+  },
+
+  /**
+   * Get the Cu.Sandbox object for the active tab content window object. Note
+   * that the returned object is cached for later reuse. The cached object is
+   * kept only for the current location in the current tab of the current
+   * browser window and it is reset for each context switch,
+   * navigator:browser window switch, tab switch or navigation.
+   */
+  get contentSandbox()
+  {
+    if (!this.browserWindow) {
+      Cu.reportError(this.strings.
+                     GetStringFromName("browserWindow.unavailable"));
+      return;
+    }
+
+    if (!this._contentSandbox ||
+        this.browserWindow != this._previousBrowserWindow ||
+        this._previousBrowser != this.gBrowser.selectedBrowser ||
+        this._previousLocation != this.gBrowser.contentWindow.location.href) {
+      let contentWindow = this.gBrowser.selectedBrowser.contentWindow;
+      this._contentSandbox = new Cu.Sandbox(contentWindow,
+        { sandboxPrototype: contentWindow, wantXrays: false,
+          sandboxName: 'scratchpad-content'});
+      this._contentSandbox.__SCRATCHPAD__ = this;
+
+      this._previousBrowserWindow = this.browserWindow;
+      this._previousBrowser = this.gBrowser.selectedBrowser;
+      this._previousLocation = contentWindow.location.href;
+    }
+
+    return this._contentSandbox;
+  },
+
+  /**
+   * Cached Cu.Sandbox object for the most recently active navigator:browser
+   * chrome window object.
+   */
+  _chromeSandbox: null,
+
+  /**
+   * Get the Cu.Sandbox object for the most recently active navigator:browser
+   * chrome window object. Note that the returned object is cached for later
+   * reuse. The cached object is kept only for the current browser window and it
+   * is reset for each context switch or navigator:browser window switch.
+   */
+  get chromeSandbox()
+  {
+    if (!this.browserWindow) {
+      Cu.reportError(this.strings.
+                     GetStringFromName("browserWindow.unavailable"));
+      return;
+    }
+
+    if (!this._chromeSandbox ||
+        this.browserWindow != this._previousBrowserWindow) {
+      this._chromeSandbox = new Cu.Sandbox(this.browserWindow,
+        { sandboxPrototype: this.browserWindow, wantXrays: false,
+          sandboxName: 'scratchpad-chrome'});
+      this._chromeSandbox.__SCRATCHPAD__ = this;
+      addDebuggerToGlobal(this._chromeSandbox);
+
+      this._previousBrowserWindow = this.browserWindow;
+    }
+
+    return this._chromeSandbox;
+  },
+
+  /**
+   * Drop the editor selection.
+   */
+  deselect: function SP_deselect()
+  {
+    this.editor.dropSelection();
+  },
+
+  /**
+   * Select a specific range in the Scratchpad editor.
+   *
+   * @param number aStart
+   *        Selection range start.
+   * @param number aEnd
+   *        Selection range end.
+   */
+  selectRange: function SP_selectRange(aStart, aEnd)
+  {
+    this.editor.setSelection(aStart, aEnd);
+  },
+
+  /**
+   * Get the current selection range.
+   *
+   * @return object
+   *         An object with two properties, start and end, that give the
+   *         selection range (zero based offsets).
+   */
+  getSelectionRange: function SP_getSelection()
+  {
+    return this.editor.getSelection();
+  },
+
+  /**
+   * Evaluate a string in the currently desired context, that is either the
+   * chrome window or the tab content window object.
+   *
+   * @param string aString
+   *        The script you want to evaluate.
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  evalForContext: function SP_evaluateForContext(aString)
+  {
+    let deferred = Promise.defer();
+
+    // This setTimeout is temporary and will be replaced by DebuggerClient
+    // execution in a future patch (bug 825039). The purpose for using
+    // setTimeout is to ensure there is no accidental dependency on the
+    // promise being resolved synchronously, which can cause subtle bugs.
+    setTimeout(() => {
+      let chrome = this.executionContext != SCRATCHPAD_CONTEXT_CONTENT;
+      let sandbox = chrome ? this.chromeSandbox : this.contentSandbox;
+      let name = this.uniqueName;
+
+      try {
+        let result = Cu.evalInSandbox(aString, sandbox, "1.8", name, 1);
+        deferred.resolve([aString, undefined, result]);
+      }
+      catch (ex) {
+        deferred.resolve([aString, ex]);
+      }
+    }, 0);
+
+    return deferred.promise;
+  },
+
+  /**
+   * Execute the selected text (if any) or the entire editor content in the
+   * current context.
+   *
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  execute: function SP_execute()
+  {
+    let selection = this.selectedText || this.getText();
+    return this.evalForContext(selection);
+  },
+
+  /**
+   * Execute the selected text (if any) or the entire editor content in the
+   * current context.
+   *
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  run: function SP_run()
+  {
+    let promise = this.execute();
+    promise.then(([, aError, ]) => {
+      if (aError) {
+        this.writeAsErrorComment(aError);
+      }
+      else {
+        this.deselect();
+      }
+    });
+    return promise;
+  },
+
+  /**
+   * Execute the selected text (if any) or the entire editor content in the
+   * current context. If the result is primitive then it is written as a
+   * comment. Otherwise, the resulting object is inspected up in the sidebar.
+   *
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  inspect: function SP_inspect()
+  {
+    let deferred = Promise.defer();
+    let reject = aReason => deferred.reject(aReason);
+
+    this.execute().then(([aString, aError, aResult]) => {
+      let resolve = () => deferred.resolve([aString, aError, aResult]);
+
+      if (aError) {
+        this.writeAsErrorComment(aError);
+        resolve();
+      }
+      else if (!isObject(aResult)) {
+        this.writeAsComment(aResult);
+        resolve();
+      }
+      else {
+        this.deselect();
+        this.sidebar.open(aString, aResult).then(resolve, reject);
+      }
+    }, reject);
+
+    return deferred.promise;
+  },
+
+  /**
+   * Reload the current page and execute the entire editor content when
+   * the page finishes loading. Note that this operation should be available
+   * only in the content context.
+   *
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  reloadAndRun: function SP_reloadAndRun()
+  {
+    let deferred = Promise.defer();
+
+    if (this.executionContext !== SCRATCHPAD_CONTEXT_CONTENT) {
+      Cu.reportError(this.strings.
+          GetStringFromName("scratchpadContext.invalid"));
+      return;
+    }
+
+    let browser = this.gBrowser.selectedBrowser;
+
+    this._reloadAndRunEvent = evt => {
+      if (evt.target !== browser.contentDocument) {
+        return;
+      }
+
+      browser.removeEventListener("load", this._reloadAndRunEvent, true);
+
+      this.run().then(aResults => deferred.resolve(aResults));
+    };
+
+    browser.addEventListener("load", this._reloadAndRunEvent, true);
+    browser.contentWindow.location.reload();
+
+    return deferred.promise;
+  },
+
+  /**
+   * Execute the selected text (if any) or the entire editor content in the
+   * current context. The evaluation result is inserted into the editor after
+   * the selected text, or at the end of the editor content if there is no
+   * selected text.
+   *
+   * @return Promise
+   *         The promise for the script evaluation result.
+   */
+  display: function SP_display()
+  {
+    let promise = this.execute();
+    promise.then(([aString, aError, aResult]) => {
+      if (aError) {
+        this.writeAsErrorComment(aError);
+      }
+      else {
+        this.writeAsComment(aResult);
+      }
+    });
+    return promise;
+  },
+
+  /**
+   * Write out a value at the next line from the current insertion point.
+   * The comment block will always be preceded by a newline character.
+   * @param object aValue
+   *        The Object to write out as a string
+   */
+  writeAsComment: function SP_writeAsComment(aValue)
+  {
+    let selection = this.getSelectionRange();
+    let insertionPoint = selection.start != selection.end ?
+                         selection.end : // after selected text
+                         this.editor.getCharCount(); // after text end
+
+    let newComment = "\n/*\n" + aValue + "\n*/";
+
+    this.setText(newComment, insertionPoint, insertionPoint);
+
+    // Select the new comment.
+    this.selectRange(insertionPoint, insertionPoint + newComment.length);
+  },
+
+  /**
+   * Write out an error at the current insertion point as a block comment
+   * @param object aValue
+   *        The Error object to write out the message and stack trace
+   */
+  writeAsErrorComment: function SP_writeAsErrorComment(aError)
+  {
+    let stack = "";
+    if (aError.stack) {
+      stack = aError.stack;
+    }
+    else if (aError.fileName) {
+      if (aError.lineNumber) {
+        stack = "@" + aError.fileName + ":" + aError.lineNumber;
+      }
+      else {
+        stack = "@" + aError.fileName;
+      }
+    }
+    else if (aError.lineNumber) {
+      stack = "@" + aError.lineNumber;
+    }
+
+    let newComment = "Exception: " + ( aError.message || aError) + ( stack == "" ? stack : "\n" + stack.replace(/\n$/, "") );
+
+    this.writeAsComment(newComment);
+  },
+
+  // Menu Operations
+
+  /**
+   * Open a new Scratchpad window.
+   *
+   * @return nsIWindow
+   */
+  openScratchpad: function SP_openScratchpad()
+  {
+    return ScratchpadManager.openScratchpad();
+  },
+
+  /**
+   * Export the textbox content to a file.
+   *
+   * @param nsILocalFile aFile
+   *        The file where you want to save the textbox content.
+   * @param boolean aNoConfirmation
+   *        If the file already exists, ask for confirmation?
+   * @param boolean aSilentError
+   *        True if you do not want to display an error when file save fails,
+   *        false otherwise.
+   * @param function aCallback
+   *        Optional function you want to call when file save completes. It will
+   *        get the following arguments:
+   *        1) the nsresult status code for the export operation.
+   */
+  exportToFile: function SP_exportToFile(aFile, aNoConfirmation, aSilentError,
+                                         aCallback)
+  {
+    if (!aNoConfirmation && aFile.exists() &&
+        !window.confirm(this.strings.
+                        GetStringFromName("export.fileOverwriteConfirmation"))) {
+      return;
+    }
+
+    let encoder = new TextEncoder();
+    let buffer = encoder.encode(this.getText());
+    let promise = OS.File.writeAtomic(aFile.path, buffer,{tmpPath: aFile.path + ".tmp"});
+    promise.then(value => {
+      if (aCallback) {
+        aCallback.call(this, Components.results.NS_OK);
+      }
+    }, reason => {
+      if (!aSilentError) {
+        window.alert(this.strings.GetStringFromName("saveFile.failed"));
+      }
+      if (aCallback) {
+        aCallback.call(this, Components.results.NS_ERROR_UNEXPECTED);
+      }
+    });
+
+  },
+
+  /**
+   * Read the content of a file and put it into the textbox.
+   *
+   * @param nsILocalFile aFile
+   *        The file you want to save the textbox content into.
+   * @param boolean aSilentError
+   *        True if you do not want to display an error when file load fails,
+   *        false otherwise.
+   * @param function aCallback
+   *        Optional function you want to call when file load completes. It will
+   *        get the following arguments:
+   *        1) the nsresult status code for the import operation.
+   *        2) the data that was read from the file, if any.
+   */
+  importFromFile: function SP_importFromFile(aFile, aSilentError, aCallback)
+  {
+    // Prevent file type detection.
+    let channel = NetUtil.newChannel(aFile);
+    channel.contentType = "application/javascript";
+
+    NetUtil.asyncFetch(channel, (aInputStream, aStatus) => {
+      let content = null;
+
+      if (Components.isSuccessCode(aStatus)) {
+        let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+                        createInstance(Ci.nsIScriptableUnicodeConverter);
+        converter.charset = "UTF-8";
+        content = NetUtil.readInputStreamToString(aInputStream,
+                                                  aInputStream.available());
+        content = converter.ConvertToUnicode(content);
+
+        // Check to see if the first line is a mode-line comment.
+        let line = content.split("\n")[0];
+        let modeline = this._scanModeLine(line);
+        let chrome = Services.prefs.getBoolPref(DEVTOOLS_CHROME_ENABLED);
+
+        if (chrome && modeline["-sp-context"] === "browser") {
+          this.setBrowserContext();
+        }
+
+        this.setText(content);
+        this.editor.resetUndo();
+      }
+      else if (!aSilentError) {
+        window.alert(this.strings.GetStringFromName("openFile.failed"));
+      }
+
+      if (aCallback) {
+        aCallback.call(this, aStatus, content);
+      }
+    });
+  },
+
+  /**
+   * Open a file to edit in the Scratchpad.
+   *
+   * @param integer aIndex
+   *        Optional integer: clicked menuitem in the 'Open Recent'-menu.
+   */
+  openFile: function SP_openFile(aIndex)
+  {
+    let promptCallback = aFile => {
+      this.promptSave((aCloseFile, aSaved, aStatus) => {
+        let shouldOpen = aCloseFile;
+        if (aSaved && !Components.isSuccessCode(aStatus)) {
+          shouldOpen = false;
+        }
+
+        if (shouldOpen) {
+          let file;
+          if (aFile) {
+            file = aFile;
+          } else {
+            file = Components.classes["@mozilla.org/file/local;1"].
+                   createInstance(Components.interfaces.nsILocalFile);
+            let filePath = this.getRecentFiles()[aIndex];
+            file.initWithPath(filePath);
+          }
+
+          if (!file.exists()) {
+            this.notificationBox.appendNotification(
+              this.strings.GetStringFromName("fileNoLongerExists.notification"),
+              "file-no-longer-exists",
+              null,
+              this.notificationBox.PRIORITY_WARNING_HIGH,
+              null);
+
+            this.clearFiles(aIndex, 1);
+            return;
+          }
+
+          this.setFilename(file.path);
+          this.importFromFile(file, false);
+          this.setRecentFile(file);
+        }
+      });
+    };
+
+    if (aIndex > -1) {
+      promptCallback();
+    } else {
+      let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+      fp.init(window, this.strings.GetStringFromName("openFile.title"),
+              Ci.nsIFilePicker.modeOpen);
+      fp.defaultString = "";
+      fp.open(aResult => {
+        if (aResult != Ci.nsIFilePicker.returnCancel) {
+          promptCallback(fp.file);
+        }
+      });
+    }
+  },
+
+  /**
+   * Get recent files.
+   *
+   * @return Array
+   *         File paths.
+   */
+  getRecentFiles: function SP_getRecentFiles()
+  {
+    let branch = Services.prefs.getBranch("devtools.scratchpad.");
+    let filePaths = [];
+
+    // WARNING: Do not use getCharPref here, it doesn't play nicely with
+    // Unicode strings.
+
+    if (branch.prefHasUserValue("recentFilePaths")) {
+      let data = branch.getComplexValue("recentFilePaths",
+        Ci.nsISupportsString).data;
+      filePaths = JSON.parse(data);
+    }
+
+    return filePaths;
+  },
+
+  /**
+   * Save a recent file in a JSON parsable string.
+   *
+   * @param nsILocalFile aFile
+   *        The nsILocalFile we want to save as a recent file.
+   */
+  setRecentFile: function SP_setRecentFile(aFile)
+  {
+    let maxRecent = Services.prefs.getIntPref(PREF_RECENT_FILES_MAX);
+    if (maxRecent < 1) {
+      return;
+    }
+
+    let filePaths = this.getRecentFiles();
+    let filesCount = filePaths.length;
+    let pathIndex = filePaths.indexOf(aFile.path);
+
+    // We are already storing this file in the list of recent files.
+    if (pathIndex > -1) {
+      // If it's already the most recent file, we don't have to do anything.
+      if (pathIndex === (filesCount - 1)) {
+        // Updating the menu to clear the disabled state from the wrong menuitem
+        // in rare cases when two or more Scratchpad windows are open and the
+        // same file has been opened in two or more windows.
+        this.populateRecentFilesMenu();
+        return;
+      }
+
+      // It is not the most recent file. Remove it from the list, we add it as
+      // the most recent farther down.
+      filePaths.splice(pathIndex, 1);
+    }
+    // If we are not storing the file and the 'recent files'-list is full,
+    // remove the oldest file from the list.
+    else if (filesCount === maxRecent) {
+      filePaths.shift();
+    }
+
+    filePaths.push(aFile.path);
+
+    // WARNING: Do not use setCharPref here, it doesn't play nicely with
+    // Unicode strings.
+
+    let str = Cc["@mozilla.org/supports-string;1"]
+      .createInstance(Ci.nsISupportsString);
+    str.data = JSON.stringify(filePaths);
+
+    let branch = Services.prefs.getBranch("devtools.scratchpad.");
+    branch.setComplexValue("recentFilePaths",
+      Ci.nsISupportsString, str);
+  },
+
+  /**
+   * Populates the 'Open Recent'-menu.
+   */
+  populateRecentFilesMenu: function SP_populateRecentFilesMenu()
+  {
+    let maxRecent = Services.prefs.getIntPref(PREF_RECENT_FILES_MAX);
+    let recentFilesMenu = document.getElementById("sp-open_recent-menu");
+
+    if (maxRecent < 1) {
+      recentFilesMenu.setAttribute("hidden", true);
+      return;
+    }
+
+    let recentFilesPopup = recentFilesMenu.firstChild;
+    let filePaths = this.getRecentFiles();
+    let filename = this.getState().filename;
+
+    recentFilesMenu.setAttribute("disabled", true);
+    while (recentFilesPopup.hasChildNodes()) {
+      recentFilesPopup.removeChild(recentFilesPopup.firstChild);
+    }
+
+    if (filePaths.length > 0) {
+      recentFilesMenu.removeAttribute("disabled");
+
+      // Print out menuitems with the most recent file first.
+      for (let i = filePaths.length - 1; i >= 0; --i) {
+        let menuitem = document.createElement("menuitem");
+        menuitem.setAttribute("type", "radio");
+        menuitem.setAttribute("label", filePaths[i]);
+
+        if (filePaths[i] === filename) {
+          menuitem.setAttribute("checked", true);
+          menuitem.setAttribute("disabled", true);
+        }
+
+        menuitem.setAttribute("oncommand", "Scratchpad.openFile(" + i + ");");
+        recentFilesPopup.appendChild(menuitem);
+      }
+
+      recentFilesPopup.appendChild(document.createElement("menuseparator"));
+      let clearItems = document.createElement("menuitem");
+      clearItems.setAttribute("id", "sp-menu-clear_recent");
+      clearItems.setAttribute("label",
+                              this.strings.
+                              GetStringFromName("clearRecentMenuItems.label"));
+      clearItems.setAttribute("command", "sp-cmd-clearRecentFiles");
+      recentFilesPopup.appendChild(clearItems);
+    }
+  },
+
+  /**
+   * Clear a range of files from the list.
+   *
+   * @param integer aIndex
+   *        Index of file in menu to remove.
+   * @param integer aLength
+   *        Number of files from the index 'aIndex' to remove.
+   */
+  clearFiles: function SP_clearFile(aIndex, aLength)
+  {
+    let filePaths = this.getRecentFiles();
+    filePaths.splice(aIndex, aLength);
+
+    // WARNING: Do not use setCharPref here, it doesn't play nicely with
+    // Unicode strings.
+
+    let str = Cc["@mozilla.org/supports-string;1"]
+      .createInstance(Ci.nsISupportsString);
+    str.data = JSON.stringify(filePaths);
+
+    let branch = Services.prefs.getBranch("devtools.scratchpad.");
+    branch.setComplexValue("recentFilePaths",
+      Ci.nsISupportsString, str);
+  },
+
+  /**
+   * Clear all recent files.
+   */
+  clearRecentFiles: function SP_clearRecentFiles()
+  {
+    Services.prefs.clearUserPref("devtools.scratchpad.recentFilePaths");
+  },
+
+  /**
+   * Handle changes to the 'PREF_RECENT_FILES_MAX'-preference.
+   */
+  handleRecentFileMaxChange: function SP_handleRecentFileMaxChange()
+  {
+    let maxRecent = Services.prefs.getIntPref(PREF_RECENT_FILES_MAX);
+    let menu = document.getElementById("sp-open_recent-menu");
+
+    // Hide the menu if the 'PREF_RECENT_FILES_MAX'-pref is set to zero or less.
+    if (maxRecent < 1) {
+      menu.setAttribute("hidden", true);
+    } else {
+      if (menu.hasAttribute("hidden")) {
+        if (!menu.firstChild.hasChildNodes()) {
+          this.populateRecentFilesMenu();
+        }
+
+        menu.removeAttribute("hidden");
+      }
+
+      let filePaths = this.getRecentFiles();
+      if (maxRecent < filePaths.length) {
+        let diff = filePaths.length - maxRecent;
+        this.clearFiles(0, diff);
+      }
+    }
+  },
+  /**
+   * Save the textbox content to the currently open file.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved
+   */
+  saveFile: function SP_saveFile(aCallback)
+  {
+    if (!this.filename) {
+      return this.saveFileAs(aCallback);
+    }
+
+    let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
+    file.initWithPath(this.filename);
+
+    this.exportToFile(file, true, false, aStatus => {
+      if (Components.isSuccessCode(aStatus)) {
+        this.editor.dirty = false;
+        this.setRecentFile(file);
+      }
+      if (aCallback) {
+        aCallback(aStatus);
+      }
+    });
+  },
+
+  /**
+   * Save the textbox content to a new file.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved
+   */
+  saveFileAs: function SP_saveFileAs(aCallback)
+  {
+    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+    let fpCallback = aResult => {
+      if (aResult != Ci.nsIFilePicker.returnCancel) {
+        this.setFilename(fp.file.path);
+        this.exportToFile(fp.file, true, false, aStatus => {
+          if (Components.isSuccessCode(aStatus)) {
+            this.editor.dirty = false;
+            this.setRecentFile(fp.file);
+          }
+          if (aCallback) {
+            aCallback(aStatus);
+          }
+        });
+      }
+    };
+
+    fp.init(window, this.strings.GetStringFromName("saveFileAs"),
+            Ci.nsIFilePicker.modeSave);
+    fp.defaultString = "scratchpad.js";
+    fp.open(fpCallback);
+  },
+
+  /**
+   * Restore content from saved version of current file.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved
+   */
+  revertFile: function SP_revertFile(aCallback)
+  {
+    let file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
+    file.initWithPath(this.filename);
+
+    if (!file.exists()) {
+      return;
+    }
+
+    this.importFromFile(file, false, (aStatus, aContent) => {
+      if (aCallback) {
+        aCallback(aStatus);
+      }
+    });
+  },
+
+  /**
+   * Prompt to revert scratchpad if it has unsaved changes.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved. The callback
+   *        receives three arguments:
+   *          - aRevert (boolean) - tells if the file has been reverted.
+   *          - status (number) - the file revert status result (if the file was
+   *          saved).
+   */
+  promptRevert: function SP_promptRervert(aCallback)
+  {
+    if (this.filename) {
+      let ps = Services.prompt;
+      let flags = ps.BUTTON_POS_0 * ps.BUTTON_TITLE_REVERT +
+                  ps.BUTTON_POS_1 * ps.BUTTON_TITLE_CANCEL;
+
+      let button = ps.confirmEx(window,
+                          this.strings.GetStringFromName("confirmRevert.title"),
+                          this.strings.GetStringFromName("confirmRevert"),
+                          flags, null, null, null, null, {});
+      if (button == BUTTON_POSITION_CANCEL) {
+        if (aCallback) {
+          aCallback(false);
+        }
+
+        return;
+      }
+      if (button == BUTTON_POSITION_REVERT) {
+        this.revertFile(aStatus => {
+          if (aCallback) {
+            aCallback(true, aStatus);
+          }
+        });
+
+        return;
+      }
+    }
+    if (aCallback) {
+      aCallback(false);
+    }
+  },
+
+  /**
+   * Open the Error Console.
+   */
+  openErrorConsole: function SP_openErrorConsole()
+  {
+    this.browserWindow.HUDConsoleUI.toggleBrowserConsole();
+  },
+
+  /**
+   * Open the Web Console.
+   */
+  openWebConsole: function SP_openWebConsole()
+  {
+    let target = devtools.TargetFactory.forTab(this.gBrowser.selectedTab);
+    gDevTools.showToolbox(target, "webconsole");
+    this.browserWindow.focus();
+  },
+
+  /**
+   * Set the current execution context to be the active tab content window.
+   */
+  setContentContext: function SP_setContentContext()
+  {
+    if (this.executionContext == SCRATCHPAD_CONTEXT_CONTENT) {
+      return;
+    }
+
+    let content = document.getElementById("sp-menu-content");
+    document.getElementById("sp-menu-browser").removeAttribute("checked");
+    document.getElementById("sp-cmd-reloadAndRun").removeAttribute("disabled");
+    content.setAttribute("checked", true);
+    this.executionContext = SCRATCHPAD_CONTEXT_CONTENT;
+    this.notificationBox.removeAllNotifications(false);
+    this.resetContext();
+  },
+
+  /**
+   * Set the current execution context to be the most recent chrome window.
+   */
+  setBrowserContext: function SP_setBrowserContext()
+  {
+    if (this.executionContext == SCRATCHPAD_CONTEXT_BROWSER) {
+      return;
+    }
+
+    let browser = document.getElementById("sp-menu-browser");
+    let reloadAndRun = document.getElementById("sp-cmd-reloadAndRun");
+
+    document.getElementById("sp-menu-content").removeAttribute("checked");
+    reloadAndRun.setAttribute("disabled", true);
+    browser.setAttribute("checked", true);
+
+    this.executionContext = SCRATCHPAD_CONTEXT_BROWSER;
+    this.notificationBox.appendNotification(
+      this.strings.GetStringFromName("browserContext.notification"),
+      SCRATCHPAD_CONTEXT_BROWSER,
+      null,
+      this.notificationBox.PRIORITY_WARNING_HIGH,
+      null);
+    this.resetContext();
+  },
+
+  /**
+   * Reset the cached Cu.Sandbox object for the current context.
+   */
+  resetContext: function SP_resetContext()
+  {
+    this._chromeSandbox = null;
+    this._contentSandbox = null;
+    this._previousWindow = null;
+    this._previousBrowser = null;
+    this._previousLocation = null;
+  },
+
+  /**
+   * Gets the ID of the inner window of the given DOM window object.
+   *
+   * @param nsIDOMWindow aWindow
+   * @return integer
+   *         the inner window ID
+   */
+  getInnerWindowId: function SP_getInnerWindowId(aWindow)
+  {
+    return aWindow.QueryInterface(Ci.nsIInterfaceRequestor).
+           getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
+  },
+
+  /**
+   * The Scratchpad window load event handler. This method
+   * initializes the Scratchpad window and source editor.
+   *
+   * @param nsIDOMEvent aEvent
+   */
+  onLoad: function SP_onLoad(aEvent)
+  {
+    if (aEvent.target != document) {
+      return;
+    }
+
+    let chrome = Services.prefs.getBoolPref(DEVTOOLS_CHROME_ENABLED);
+    if (chrome) {
+      let environmentMenu = document.getElementById("sp-environment-menu");
+      let errorConsoleCommand = document.getElementById("sp-cmd-errorConsole");
+      let chromeContextCommand = document.getElementById("sp-cmd-browserContext");
+      environmentMenu.removeAttribute("hidden");
+      chromeContextCommand.removeAttribute("disabled");
+      errorConsoleCommand.removeAttribute("disabled");
+    }
+
+    let initialText = this.strings.formatStringFromName(
+      "scratchpadIntro1",
+      [LayoutHelpers.prettyKey(document.getElementById("sp-key-run")),
+       LayoutHelpers.prettyKey(document.getElementById("sp-key-inspect")),
+       LayoutHelpers.prettyKey(document.getElementById("sp-key-display"))],
+      3);
+
+    let args = window.arguments;
+
+    if (args && args[0] instanceof Ci.nsIDialogParamBlock) {
+      args = args[0];
+    } else {
+      // If this Scratchpad window doesn't have any arguments, horrible
+      // things might happen so we need to report an error.
+      Cu.reportError(this.strings. GetStringFromName("scratchpad.noargs"));
+    }
+
+    this._instanceId = args.GetString(0);
+
+    let state = args.GetString(1) || null;
+    if (state) {
+      state = JSON.parse(state);
+      this.setState(state);
+      initialText = state.text;
+    }
+
+    this.editor = new SourceEditor();
+
+    let config = {
+      mode: SourceEditor.MODES.JAVASCRIPT,
+      showLineNumbers: true,
+      initialText: initialText,
+      contextMenu: "scratchpad-text-popup",
+    };
+
+    let editorPlaceholder = document.getElementById("scratchpad-editor");
+    this.editor.init(editorPlaceholder, config,
+                     this._onEditorLoad.bind(this, state));
+  },
+
+  /**
+   * The load event handler for the source editor. This method does post-load
+   * editor initialization.
+   *
+   * @private
+   * @param object aState
+   *        The initial Scratchpad state object.
+   */
+  _onEditorLoad: function SP__onEditorLoad(aState)
+  {
+    this.editor.addEventListener(SourceEditor.EVENTS.DIRTY_CHANGED,
+                                 this._onDirtyChanged);
+    this.editor.focus();
+    this.editor.setCaretOffset(this.editor.getCharCount());
+    if (aState) {
+      this.editor.dirty = !aState.saved;
+    }
+
+    this.initialized = true;
+
+    this._triggerObservers("Ready");
+
+    this.populateRecentFilesMenu();
+    PreferenceObserver.init();
+  },
+
+  /**
+   * Insert text at the current caret location.
+   *
+   * @param string aText
+   *        The text you want to insert.
+   */
+  insertTextAtCaret: function SP_insertTextAtCaret(aText)
+  {
+    let caretOffset = this.editor.getCaretOffset();
+    this.setText(aText, caretOffset, caretOffset);
+    this.editor.setCaretOffset(caretOffset + aText.length);
+  },
+
+  /**
+   * The Source Editor DirtyChanged event handler. This function updates the
+   * Scratchpad window title to show an asterisk when there are unsaved changes.
+   *
+   * @private
+   * @see SourceEditor.EVENTS.DIRTY_CHANGED
+   * @param object aEvent
+   *        The DirtyChanged event object.
+   */
+  _onDirtyChanged: function SP__onDirtyChanged(aEvent)
+  {
+    Scratchpad._updateTitle();
+    if (Scratchpad.filename) {
+      if (Scratchpad.editor.dirty) {
+        document.getElementById("sp-cmd-revert").removeAttribute("disabled");
+      }
+      else {
+        document.getElementById("sp-cmd-revert").setAttribute("disabled", true);
+      }
+    }
+  },
+
+  /**
+   * Undo the last action of the user.
+   */
+  undo: function SP_undo()
+  {
+    this.editor.undo();
+  },
+
+  /**
+   * Redo the previously undone action.
+   */
+  redo: function SP_redo()
+  {
+    this.editor.redo();
+  },
+
+  /**
+   * The Scratchpad window unload event handler. This method unloads/destroys
+   * the source editor.
+   *
+   * @param nsIDOMEvent aEvent
+   */
+  onUnload: function SP_onUnload(aEvent)
+  {
+    if (aEvent.target != document) {
+      return;
+    }
+
+    this.resetContext();
+
+    // This event is created only after user uses 'reload and run' feature.
+    if (this._reloadAndRunEvent) {
+      this.gBrowser.selectedBrowser.removeEventListener("load",
+          this._reloadAndRunEvent, true);
+    }
+
+    this.editor.removeEventListener(SourceEditor.EVENTS.DIRTY_CHANGED,
+                                    this._onDirtyChanged);
+    PreferenceObserver.uninit();
+
+    this.editor.destroy();
+    this.editor = null;
+    this.initialized = false;
+  },
+
+  /**
+   * Prompt to save scratchpad if it has unsaved changes.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved. The callback
+   *        receives three arguments:
+   *          - toClose (boolean) - tells if the window should be closed.
+   *          - saved (boolen) - tells if the file has been saved.
+   *          - status (number) - the file save status result (if the file was
+   *          saved).
+   * @return boolean
+   *         Whether the window should be closed
+   */
+  promptSave: function SP_promptSave(aCallback)
+  {
+    if (this.editor.dirty) {
+      let ps = Services.prompt;
+      let flags = ps.BUTTON_POS_0 * ps.BUTTON_TITLE_SAVE +
+                  ps.BUTTON_POS_1 * ps.BUTTON_TITLE_CANCEL +
+                  ps.BUTTON_POS_2 * ps.BUTTON_TITLE_DONT_SAVE;
+
+      let button = ps.confirmEx(window,
+                          this.strings.GetStringFromName("confirmClose.title"),
+                          this.strings.GetStringFromName("confirmClose"),
+                          flags, null, null, null, null, {});
+
+      if (button == BUTTON_POSITION_CANCEL) {
+        if (aCallback) {
+          aCallback(false, false);
+        }
+        return false;
+      }
+
+      if (button == BUTTON_POSITION_SAVE) {
+        this.saveFile(aStatus => {
+          if (aCallback) {
+            aCallback(true, true, aStatus);
+          }
+        });
+        return true;
+      }
+    }
+
+    if (aCallback) {
+      aCallback(true, false);
+    }
+    return true;
+  },
+
+  /**
+   * Handler for window close event. Prompts to save scratchpad if
+   * there are unsaved changes.
+   *
+   * @param nsIDOMEvent aEvent
+   * @param function aCallback
+   *        Optional function you want to call when file is saved/closed.
+   *        Used mainly for tests.
+   */
+  onClose: function SP_onClose(aEvent, aCallback)
+  {
+    aEvent.preventDefault();
+    this.close(aCallback);
+  },
+
+  /**
+   * Close the scratchpad window. Prompts before closing if the scratchpad
+   * has unsaved changes.
+   *
+   * @param function aCallback
+   *        Optional function you want to call when file is saved
+   */
+  close: function SP_close(aCallback)
+  {
+    this.promptSave((aShouldClose, aSaved, aStatus) => {
+      let shouldClose = aShouldClose;
+      if (aSaved && !Components.isSuccessCode(aStatus)) {
+        shouldClose = false;
+      }
+
+      if (shouldClose) {
+        telemetry.toolClosed("scratchpad");
+        window.close();
+      }
+      if (aCallback) {
+        aCallback();
+      }
+    });
+  },
+
+  _observers: [],
+
+  /**
+   * Add an observer for Scratchpad events.
+   *
+   * The observer implements IScratchpadObserver := {
+   *   onReady:      Called when the Scratchpad and its SourceEditor are ready.
+   *                 Arguments: (Scratchpad aScratchpad)
+   * }
+   *
+   * All observer handlers are optional.
+   *
+   * @param IScratchpadObserver aObserver
+   * @see removeObserver
+   */
+  addObserver: function SP_addObserver(aObserver)
+  {
+    this._observers.push(aObserver);
+  },
+
+  /**
+   * Remove an observer for Scratchpad events.
+   *
+   * @param IScratchpadObserver aObserver
+   * @see addObserver
+   */
+  removeObserver: function SP_removeObserver(aObserver)
+  {
+    let index = this._observers.indexOf(aObserver);
+    if (index != -1) {
+      this._observers.splice(index, 1);
+    }
+  },
+
+  /**
+   * Trigger named handlers in Scratchpad observers.
+   *
+   * @param string aName
+   *        Name of the handler to trigger.
+   * @param Array aArgs
+   *        Optional array of arguments to pass to the observer(s).
+   * @see addObserver
+   */
+  _triggerObservers: function SP_triggerObservers(aName, aArgs)
+  {
+    // insert this Scratchpad instance as the first argument
+    if (!aArgs) {
+      aArgs = [this];
+    } else {
+      aArgs.unshift(this);
+    }
+
+    // trigger all observers that implement this named handler
+    for (let i = 0; i < this._observers.length; ++i) {
+      let observer = this._observers[i];
+      let handler = observer["on" + aName];
+      if (handler) {
+        handler.apply(observer, aArgs);
+      }
+    }
+  },
+
+  openDocumentationPage: function SP_openDocumentationPage()
+  {
+    let url = this.strings.GetStringFromName("help.openDocumentationPage");
+    let newTab = this.gBrowser.addTab(url);
+    this.browserWindow.focus();
+    this.gBrowser.selectedTab = newTab;
+  },
+};
+
+
+/**
+ * Encapsulates management of the sidebar containing the VariablesView for
+ * object inspection.
+ */
+function ScratchpadSidebar(aScratchpad)
+{
+  let ToolSidebar = devtools.require("devtools/framework/sidebar").ToolSidebar;
+  let tabbox = document.querySelector("#scratchpad-sidebar");
+  this._sidebar = new ToolSidebar(tabbox, this, "scratchpad");
+  this._scratchpad = aScratchpad;
+}
+
+ScratchpadSidebar.prototype = {
+  /*
+   * The ToolSidebar for this sidebar.
+   */
+  _sidebar: null,
+
+  /*
+   * The VariablesView for this sidebar.
+   */
+  variablesView: null,
+
+  /*
+   * Whether the sidebar is currently shown.
+   */
+  visible: false,
+
+  /**
+   * Open the sidebar, if not open already, and populate it with the properties
+   * of the given object.
+   *
+   * @param string aString
+   *        The string that was evaluated.
+   * @param object aObject
+   *        The object to inspect, which is the aEvalString evaluation result.
+   * @return Promise
+   *         A promise that will resolve once the sidebar is open.
+   */
+  open: function SS_open(aEvalString, aObject)
+  {
+    this.show();
+
+    let deferred = Promise.defer();
+
+    let onTabReady = () => {
+      if (!this.variablesView) {
+        let window = this._sidebar.getWindowForTab("variablesview");
+        let container = window.document.querySelector("#variables");
+        this.variablesView = new VariablesView(container, {
+          searchEnabled: true,
+          searchPlaceholder: this._scratchpad.strings
+                             .GetStringFromName("propertiesFilterPlaceholder")
+        });
+      }
+      this._update(aObject).then(() => deferred.resolve());
+    };
+
+    if (this._sidebar.getCurrentTabID() == "variablesview") {
+      onTabReady();
+    }
+    else {
+      this._sidebar.once("variablesview-ready", onTabReady);
+      this._sidebar.addTab("variablesview", VARIABLES_VIEW_URL, true);
+    }
+
+    return deferred.promise;
+  },
+
+  /**
+   * Show the sidebar.
+   */
+  show: function SS_show()
+  {
+    if (!this.visible) {
+      this.visible = true;
+      this._sidebar.show();
+    }
+  },
+
+  /**
+   * Hide the sidebar.
+   */
+  hide: function SS_hide()
+  {
+    if (this.visible) {
+      this.visible = false;
+      this._sidebar.hide();
+    }
+  },
+
+  /**
+   * Update the object currently inspected by the sidebar.
+   *
+   * @param object aObject
+   *        The object to inspect in the sidebar.
+   * @return Promise
+   *         A promise that resolves when the update completes.
+   */
+  _update: function SS__update(aObject)
+  {
+    let deferred = Promise.defer();
+
+    this.variablesView.rawObject = aObject;
+
+    // In the future this will work on remote values (bug 825039).
+    setTimeout(() => deferred.resolve(), 0);
+    return deferred.promise;
+  }
+};
+
+
+/**
+ * Check whether a value is non-primitive.
+ */
+function isObject(aValue)
+{
+  let type = typeof aValue;
+  return type == "object" ? aValue != null : type == "function";
+}
+
+
+/**
+ * The PreferenceObserver listens for preference changes while Scratchpad is
+ * running.
+ */
+var PreferenceObserver = {
+  _initialized: false,
+
+  init: function PO_init()
+  {
+    if (this._initialized) {
+      return;
+    }
+
+    this.branch = Services.prefs.getBranch("devtools.scratchpad.");
+    this.branch.addObserver("", this, false);
+    this._initialized = true;
+  },
+
+  observe: function PO_observe(aMessage, aTopic, aData)
+  {
+    if (aTopic != "nsPref:changed") {
+      return;
+    }
+
+    if (aData == "recentFilesMax") {
+      Scratchpad.handleRecentFileMaxChange();
+    }
+    else if (aData == "recentFilePaths") {
+      Scratchpad.populateRecentFilesMenu();
+    }
+  },
+
+  uninit: function PO_uninit () {
+    if (!this.branch) {
+      return;
+    }
+
+    this.branch.removeObserver("", this);
+    this.branch = null;
+  }
+};
+
+XPCOMUtils.defineLazyGetter(Scratchpad, "strings", function () {
+  return Services.strings.createBundle(SCRATCHPAD_L10N);
+});
+
+addEventListener("load", Scratchpad.onLoad.bind(Scratchpad), false);
+addEventListener("unload", Scratchpad.onUnload.bind(Scratchpad), false);
+addEventListener("close", Scratchpad.onClose.bind(Scratchpad), false);
diff --git a/browser/devtools/scratchpad/scratchpad.xul b/browser/devtools/scratchpad/scratchpad.xul
new file mode 100644
index 000000000..af66b0832
--- /dev/null
+++ b/browser/devtools/scratchpad/scratchpad.xul
@@ -0,0 +1,301 @@
+<?xml version="1.0"?>
+#ifdef 0
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+#endif
+<!DOCTYPE window [
+<!ENTITY % scratchpadDTD SYSTEM "chrome://browser/locale/devtools/scratchpad.dtd" >
+ %scratchpadDTD;
+]>
+<?xml-stylesheet href="chrome://global/skin/global.css"?>
+<?xml-stylesheet href="chrome://browser/skin/devtools/common.css"?>
+<?xml-stylesheet href="chrome://browser/skin/devtools/scratchpad.css"?>
+<?xul-overlay href="chrome://global/content/editMenuOverlay.xul"?>
+<?xul-overlay href="chrome://browser/content/devtools/source-editor-overlay.xul"?>
+
+<window id="main-window"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        title="&window.title;"
+        windowtype="devtools:scratchpad"
+        macanimationtype="document"
+        fullscreenbutton="true"
+        screenX="4" screenY="4"
+        width="640" height="480"
+        persist="screenX screenY width height sizemode">
+
+<script type="application/javascript" src="chrome://global/content/globalOverlay.js"/>
+<script type="application/javascript" src="chrome://browser/content/devtools/scratchpad.js"/>
+
+<commandset id="editMenuCommands"/>
+<commandset id="sourceEditorCommands"/>
+
+<commandset id="sp-commandset">
+  <command id="sp-cmd-newWindow" oncommand="Scratchpad.openScratchpad();"/>
+  <command id="sp-cmd-openFile" oncommand="Scratchpad.openFile();"/>
+  <command id="sp-cmd-clearRecentFiles" oncommand="Scratchpad.clearRecentFiles();"/>
+  <command id="sp-cmd-save" oncommand="Scratchpad.saveFile();"/>
+  <command id="sp-cmd-saveas" oncommand="Scratchpad.saveFileAs();"/>
+  <command id="sp-cmd-revert" oncommand="Scratchpad.promptRevert();" disabled="true"/>
+
+  <!-- TODO: bug 650340 - implement printFile()
+  <command id="sp-cmd-printFile" oncommand="Scratchpad.printFile();" disabled="true"/>
+ -->
+
+  <command id="sp-cmd-close" oncommand="Scratchpad.close();"/>
+  <command id="sp-cmd-run" oncommand="Scratchpad.run();"/>
+  <command id="sp-cmd-inspect" oncommand="Scratchpad.inspect();"/>
+  <command id="sp-cmd-display" oncommand="Scratchpad.display();"/>
+  <command id="sp-cmd-contentContext" oncommand="Scratchpad.setContentContext();"/>
+  <command id="sp-cmd-browserContext" oncommand="Scratchpad.setBrowserContext();" disabled="true"/>
+  <command id="sp-cmd-reloadAndRun" oncommand="Scratchpad.reloadAndRun();"/>
+  <command id="sp-cmd-resetContext" oncommand="Scratchpad.resetContext();"/>
+  <command id="sp-cmd-errorConsole" oncommand="Scratchpad.openErrorConsole();" disabled="true"/>
+  <command id="sp-cmd-webConsole" oncommand="Scratchpad.openWebConsole();"/>
+  <command id="sp-cmd-documentationLink" oncommand="Scratchpad.openDocumentationPage();"/>
+  <command id="sp-cmd-hideSidebar" oncommand="Scratchpad.sidebar.hide();"/>
+</commandset>
+
+<keyset id="sourceEditorKeys"/>
+
+<keyset id="sp-keyset">
+  <key id="sp-key-window"
+       key="&newWindowCmd.commandkey;"
+       command="sp-cmd-newWindow"
+       modifiers="accel"/>
+  <key id="sp-key-open"
+       key="&openFileCmd.commandkey;"
+       command="sp-cmd-openFile"
+       modifiers="accel"/>
+  <key id="sp-key-save"
+       key="&saveFileCmd.commandkey;"
+       command="sp-cmd-save"
+       modifiers="accel"/>
+  <key id="sp-key-close"
+       key="&closeCmd.key;"
+       command="sp-cmd-close"
+       modifiers="accel"/>
+
+  <!-- TODO: bug 650340 - implement printFile
+  <key id="sp-key-printFile"
+       key="&printCmd.commandkey;"
+       command="sp-cmd-printFile"
+       modifiers="accel"/>
+  -->
+
+  <key id="sp-key-run"
+       key="&run.key;"
+       command="sp-cmd-run"
+       modifiers="accel"/>
+  <key id="sp-key-inspect"
+       key="&inspect.key;"
+       command="sp-cmd-inspect"
+       modifiers="accel"/>
+  <key id="sp-key-display"
+       key="&display.key;"
+       command="sp-cmd-display"
+       modifiers="accel"/>
+  <key id="sp-key-reloadAndRun"
+       key="&reloadAndRun.key;"
+       command="sp-cmd-reloadAndRun"
+       modifiers="accel,shift"/>
+  <key id="sp-key-errorConsole"
+       key="&errorConsoleCmd.commandkey;"
+       command="sp-cmd-errorConsole"
+       modifiers="accel,shift"/>
+  <key id="sp-key-hideSidebar"
+       keycode="VK_ESCAPE"
+       command="sp-cmd-hideSidebar"/>
+  <key id="key_openHelp"
+       keycode="VK_F1"
+       command="sp-cmd-documentationLink"/>
+</keyset>
+
+
+<menubar id="sp-menubar">
+  <menu id="sp-file-menu" label="&fileMenu.label;"
+        accesskey="&fileMenu.accesskey;">
+    <menupopup id="sp-menu-filepopup">
+      <menuitem id="sp-menu-newscratchpad"
+                label="&newWindowCmd.label;"
+                accesskey="&newWindowCmd.accesskey;"
+                key="sp-key-window"
+                command="sp-cmd-newWindow"/>
+      <menuseparator/>
+      <menuitem id="sp-menu-open"
+                label="&openFileCmd.label;"
+                command="sp-cmd-openFile"
+                key="sp-key-open"
+                accesskey="&openFileCmd.accesskey;"/>
+      <menu id="sp-open_recent-menu" label="&openRecentMenu.label;"
+            accesskey="&openRecentMenu.accesskey;"
+            disabled="true">
+        <menupopup id="sp-menu-open_recentPopup"/>
+      </menu>
+      <menuitem id="sp-menu-save"
+                label="&saveFileCmd.label;"
+                accesskey="&saveFileCmd.accesskey;"
+                key="sp-key-save"
+                command="sp-cmd-save"/>
+      <menuitem id="sp-menu-saveas"
+                label="&saveFileAsCmd.label;"
+                accesskey="&saveFileAsCmd.accesskey;"
+                command="sp-cmd-saveas"/>
+      <menuitem id="sp-menu-revert"
+                label="&revertCmd.label;"
+                accesskey="&revertCmd.accesskey;"
+                command="sp-cmd-revert"/>
+      <menuseparator/>
+
+      <!-- TODO: bug 650340 - implement printFile
+      <menuitem id="sp-menu-print"
+                label="&printCmd.label;"
+                accesskey="&printCmd.accesskey;"
+                command="sp-cmd-printFile"/>
+      <menuseparator/>
+      -->
+
+      <menuitem id="sp-menu-close"
+                label="&closeCmd.label;"
+                key="sp-key-close"
+                accesskey="&closeCmd.accesskey;"
+                command="sp-cmd-close"/>
+    </menupopup>
+  </menu>
+
+  <menu id="sp-edit-menu" label="&editMenu.label;"
+        accesskey="&editMenu.accesskey;">
+    <menupopup id="sp-menu_editpopup"
+               onpopupshowing="goUpdateSourceEditorMenuItems()">
+      <menuitem id="se-menu-undo"/>
+      <menuitem id="se-menu-redo"/>
+      <menuseparator/>
+      <menuitem id="se-menu-cut"/>
+      <menuitem id="se-menu-copy"/>
+      <menuitem id="se-menu-paste"/>
+      <menuseparator/>
+      <menuitem id="se-menu-selectAll"/>
+      <menuseparator/>
+      <menuitem id="se-menu-find"/>
+      <menuitem id="se-menu-findAgain"/>
+      <menuseparator/>
+      <menuitem id="se-menu-gotoLine"/>
+    </menupopup>
+  </menu>
+
+  <menu id="sp-execute-menu" label="&executeMenu.label;"
+        accesskey="&executeMenu.accesskey;">
+    <menupopup id="sp-menu_executepopup">
+      <menuitem id="sp-text-run"
+                label="&run.label;"
+                accesskey="&run.accesskey;"
+                key="sp-key-run"
+                command="sp-cmd-run"/>
+      <menuitem id="sp-text-inspect"
+                label="&inspect.label;"
+                accesskey="&inspect.accesskey;"
+                key="sp-key-inspect"
+                command="sp-cmd-inspect"/>
+      <menuitem id="sp-text-display"
+                label="&display.label;"
+                accesskey="&display.accesskey;"
+                key="sp-key-display"
+                command="sp-cmd-display"/>
+      <menuseparator/>
+      <menuitem id="sp-text-reloadAndRun"
+                label="&reloadAndRun.label;"
+                key="sp-key-reloadAndRun"
+                accesskey="&reloadAndRun.accesskey;"
+                command="sp-cmd-reloadAndRun"/>
+      <menuitem id="sp-text-resetContext"
+                label="&resetContext2.label;"
+                accesskey="&resetContext2.accesskey;"
+                command="sp-cmd-resetContext"/>
+    </menupopup>
+  </menu>
+
+  <menu id="sp-environment-menu"
+        label="&environmentMenu.label;"
+        accesskey="&environmentMenu.accesskey;"
+        hidden="true">
+    <menupopup id="sp-menu-environment">
+      <menuitem id="sp-menu-content"
+                label="&contentContext.label;"
+                accesskey="&contentContext.accesskey;"
+                command="sp-cmd-contentContext"
+                checked="true"
+                type="radio"/>
+      <menuitem id="sp-menu-browser"
+                command="sp-cmd-browserContext"
+                label="&browserContext.label;"
+                accesskey="&browserContext.accesskey;"
+                type="radio"/>
+    </menupopup>
+  </menu>
+
+#ifdef XP_WIN
+  <menu id="sp-help-menu"
+        label="&helpMenu.label;"
+        accesskey="&helpMenuWin.accesskey;">
+#else
+  <menu id="sp-help-menu"
+        label="&helpMenu.label;"
+        accesskey="&helpMenu.accesskey;">
+#endif
+    <menupopup id="sp-menu-help">
+      <menuitem id="sp-menu-documentation"
+                label="&documentationLink.label;"
+                accesskey="&documentationLink.accesskey;"
+                command="sp-cmd-documentationLink"
+                key="key_openHelp"/>
+    </menupopup>
+  </menu>
+</menubar>
+
+<popupset id="scratchpad-popups">
+  <menupopup id="scratchpad-text-popup"
+             onpopupshowing="goUpdateSourceEditorMenuItems()">
+    <menuitem id="se-cMenu-cut"/>
+    <menuitem id="se-cMenu-copy"/>
+    <menuitem id="se-cMenu-paste"/>
+    <menuitem id="se-cMenu-delete"/>
+    <menuseparator/>
+    <menuitem id="se-cMenu-selectAll"/>
+    <menuseparator/>
+    <menuitem id="sp-text-run"
+              label="&run.label;"
+              accesskey="&run.accesskey;"
+              key="sp-key-run"
+              command="sp-cmd-run"/>
+    <menuitem id="sp-text-inspect"
+              label="&inspect.label;"
+              accesskey="&inspect.accesskey;"
+              key="sp-key-inspect"
+              command="sp-cmd-inspect"/>
+    <menuitem id="sp-text-display"
+              label="&display.label;"
+              accesskey="&display.accesskey;"
+              key="sp-key-display"
+              command="sp-cmd-display"/>
+    <menuseparator/>
+    <menuitem id="sp-text-resetContext"
+              label="&resetContext2.label;"
+              accesskey="&resetContext2.accesskey;"
+              command="sp-cmd-resetContext"/>
+  </menupopup>
+</popupset>
+
+<notificationbox id="scratchpad-notificationbox" flex="1">
+  <hbox flex="1">
+    <vbox id="scratchpad-editor" flex="1"/>
+    <splitter class="devtools-side-splitter"/>
+    <tabbox id="scratchpad-sidebar" class="devtools-sidebar-tabs"
+                                    width="300"
+                                    hidden="true">
+      <tabs/>
+      <tabpanels flex="1"/>
+    </tabbox>
+  </hbox>
+</notificationbox>
+
+</window>
diff --git a/browser/devtools/scratchpad/test/Makefile.in b/browser/devtools/scratchpad/test/Makefile.in
new file mode 100644
index 000000000..e74af132a
--- /dev/null
+++ b/browser/devtools/scratchpad/test/Makefile.in
@@ -0,0 +1,44 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DEPTH			= @DEPTH@
+topsrcdir	= @top_srcdir@
+srcdir		= @srcdir@
+VPATH			= @srcdir@
+relativesrcdir  = @relativesrcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+MOCHITEST_BROWSER_FILES = \
+		browser_scratchpad_initialization.js \
+		browser_scratchpad_contexts.js \
+		browser_scratchpad_tab_switch.js \
+		browser_scratchpad_execute_print.js \
+		browser_scratchpad_inspect.js \
+		browser_scratchpad_files.js \
+		browser_scratchpad_ui.js \
+		browser_scratchpad_bug_646070_chrome_context_pref.js \
+		browser_scratchpad_bug_660560_tab.js \
+		browser_scratchpad_open.js \
+		browser_scratchpad_restore.js \
+		browser_scratchpad_bug_679467_falsy.js \
+		browser_scratchpad_bug_699130_edit_ui_updates.js \
+		browser_scratchpad_bug_669612_unsaved.js \
+		browser_scratchpad_bug684546_reset_undo.js \
+		browser_scratchpad_bug690552_display_outputs_errors.js \
+		browser_scratchpad_bug650345_find_ui.js \
+		browser_scratchpad_bug714942_goto_line_ui.js \
+		browser_scratchpad_bug_650760_help_key.js \
+		browser_scratchpad_bug_651942_recent_files.js \
+		browser_scratchpad_bug756681_display_non_error_exceptions.js \
+		browser_scratchpad_bug_751744_revert_to_saved.js \
+		browser_scratchpad_bug740948_reload_and_run.js \
+		browser_scratchpad_bug_661762_wrong_window_focus.js \
+		browser_scratchpad_bug_644413_modeline.js \
+		head.js \
+
+# Disable test due to bug 807234 becoming basically permanent
+#		browser_scratchpad_bug_653427_confirm_close.js \
+
+include $(topsrcdir)/config/rules.mk
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug650345_find_ui.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug650345_find_ui.js
new file mode 100644
index 000000000..81e45aeef
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug650345_find_ui.js
@@ -0,0 +1,97 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test the Find feature in Scratchpad";
+}
+
+function runTests(aWindow, aScratchpad)
+{
+  let editor = aScratchpad.editor;
+  let text = "foobar bug650345\nBug650345 bazbaz\nfoobar omg\ntest";
+  editor.setText(text);
+
+  let needle = "foobar";
+  editor.setSelection(0, needle.length);
+
+  let oldPrompt = Services.prompt;
+  Services.prompt = {
+    prompt: function() { return true; },
+  };
+
+  let findKey = "F";
+  info("test Ctrl/Cmd-" + findKey + " (find)");
+  EventUtils.synthesizeKey(findKey, {accelKey: true}, aWindow);
+  let selection = editor.getSelection();
+  let newIndex = text.indexOf(needle, needle.length);
+  is(selection.start, newIndex, "selection.start is correct");
+  is(selection.end, newIndex + needle.length, "selection.end is correct");
+
+  info("test cmd_find");
+  aWindow.goDoCommand("cmd_find");
+  selection = editor.getSelection();
+  is(selection.start, 0, "selection.start is correct");
+  is(selection.end, needle.length, "selection.end is correct");
+
+  let findNextKey = Services.appinfo.OS == "Darwin" ? "G" : "VK_F3";
+  let findNextKeyOptions = Services.appinfo.OS == "Darwin" ?
+                           {accelKey: true} : {};
+
+  info("test " + findNextKey + " (findNext)");
+  EventUtils.synthesizeKey(findNextKey, findNextKeyOptions, aWindow);
+  selection = editor.getSelection();
+  is(selection.start, newIndex, "selection.start is correct");
+  is(selection.end, newIndex + needle.length, "selection.end is correct");
+
+  info("test cmd_findAgain");
+  aWindow.goDoCommand("cmd_findAgain");
+  selection = editor.getSelection();
+  is(selection.start, 0, "selection.start is correct");
+  is(selection.end, needle.length, "selection.end is correct");
+
+  let findPreviousKey = Services.appinfo.OS == "Darwin" ? "G" : "VK_F3";
+  let findPreviousKeyOptions = Services.appinfo.OS == "Darwin" ?
+                           {accelKey: true, shiftKey: true} : {shiftKey: true};
+
+  info("test " + findPreviousKey + " (findPrevious)");
+  EventUtils.synthesizeKey(findPreviousKey, findPreviousKeyOptions, aWindow);
+  selection = editor.getSelection();
+  is(selection.start, newIndex, "selection.start is correct");
+  is(selection.end, newIndex + needle.length, "selection.end is correct");
+
+  info("test cmd_findPrevious");
+  aWindow.goDoCommand("cmd_findPrevious");
+  selection = editor.getSelection();
+  is(selection.start, 0, "selection.start is correct");
+  is(selection.end, needle.length, "selection.end is correct");
+
+  needle = "BAZbaz";
+  newIndex = text.toLowerCase().indexOf(needle.toLowerCase());
+
+  Services.prompt = {
+    prompt: function(aWindow, aTitle, aMessage, aValue) {
+      aValue.value = needle;
+      return true;
+    },
+  };
+
+  info("test Ctrl/Cmd-" + findKey + " (find) with a custom value");
+  EventUtils.synthesizeKey(findKey, {accelKey: true}, aWindow);
+  selection = editor.getSelection();
+  is(selection.start, newIndex, "selection.start is correct");
+  is(selection.end, newIndex + needle.length, "selection.end is correct");
+
+  Services.prompt = oldPrompt;
+
+  finish();
+}
+
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug684546_reset_undo.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug684546_reset_undo.js
new file mode 100644
index 000000000..d4ec88012
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug684546_reset_undo.js
@@ -0,0 +1,158 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+
+// Reference to the Scratchpad chrome window object.
+let gScratchpadWindow;
+
+// Reference to the Scratchpad object.
+let gScratchpad;
+
+// Reference to the temporary nsIFile we will work with.
+let gFileA;
+let gFileB;
+
+// The temporary file content.
+let gFileAContent = "// File A ** Hello World!";
+let gFileBContent = "// File B ** Goodbye All";
+
+// Help track if one or both files are saved
+let gFirstFileSaved = false;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test that undo get's reset after file load in Scratchpad";
+}
+
+function runTests()
+{
+  gScratchpad = gScratchpadWindow.Scratchpad;
+
+  // Create a temporary file.
+  gFileA = FileUtils.getFile("TmpD", ["fileAForBug684546.tmp"]);
+  gFileA.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);
+
+  gFileB = FileUtils.getFile("TmpD", ["fileBForBug684546.tmp"]);
+  gFileB.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);
+
+  // Write the temporary file.
+  let foutA = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  foutA.init(gFileA.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            0644, foutA.DEFER_OPEN);
+
+  let foutB = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  foutB.init(gFileB.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            0644, foutB.DEFER_OPEN);
+
+  let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+                  createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = "UTF-8";
+  let fileContentStreamA = converter.convertToInputStream(gFileAContent);
+  let fileContentStreamB = converter.convertToInputStream(gFileBContent);
+
+  NetUtil.asyncCopy(fileContentStreamA, foutA, tempFileSaved);
+  NetUtil.asyncCopy(fileContentStreamB, foutB, tempFileSaved);
+}
+
+function tempFileSaved(aStatus)
+{
+  let success = Components.isSuccessCode(aStatus);
+
+  ok(success, "a temporary file was saved successfully");
+
+  if (!success)
+  {
+    finish();
+    return;
+  }
+
+  if (gFirstFileSaved && success)
+  {
+    ok((gFirstFileSaved && success), "Both files loaded");
+    // Import the file A into Scratchpad.
+    gScratchpad.importFromFile(gFileA.QueryInterface(Ci.nsILocalFile),  true,
+                              fileAImported);
+  }
+  gFirstFileSaved = success;
+}
+
+function fileAImported(aStatus, aFileContent)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file A was imported successfully with Scratchpad");
+
+  is(aFileContent, gFileAContent, "received data is correct");
+
+  is(gScratchpad.getText(), gFileAContent, "the editor content is correct");
+
+  gScratchpad.setText("new text", gScratchpad.getText().length);
+
+  is(gScratchpad.getText(), gFileAContent + "new text", "text updated correctly");
+  gScratchpad.undo();
+  is(gScratchpad.getText(), gFileAContent, "undo works");
+  gScratchpad.redo();
+  is(gScratchpad.getText(), gFileAContent + "new text", "redo works");
+
+  // Import the file B into Scratchpad.
+  gScratchpad.importFromFile(gFileB.QueryInterface(Ci.nsILocalFile),  true,
+                            fileBImported);
+}
+
+function fileBImported(aStatus, aFileContent)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file B was imported successfully with Scratchpad");
+
+  is(aFileContent, gFileBContent, "received data is correct");
+
+  is(gScratchpad.getText(), gFileBContent, "the editor content is correct");
+
+  ok(!gScratchpad.editor.canUndo(), "editor cannot undo after load");
+
+  gScratchpad.undo();
+  is(gScratchpad.getText(), gFileBContent,
+      "the editor content is still correct after undo");
+
+  gScratchpad.setText("new text", gScratchpad.getText().length);
+  is(gScratchpad.getText(), gFileBContent + "new text", "text updated correctly");
+
+  gScratchpad.undo();
+  is(gScratchpad.getText(), gFileBContent, "undo works");
+  ok(!gScratchpad.editor.canUndo(), "editor cannot undo after load (again)");
+
+  gScratchpad.redo();
+  is(gScratchpad.getText(), gFileBContent + "new text", "redo works");
+
+  // Done!
+  finish();
+}
+
+registerCleanupFunction(function() {
+  if (gFileA && gFileA.exists())
+  {
+    gFileA.remove(false);
+    gFileA = null;
+  }
+  if (gFileB && gFileB.exists())
+  {
+    gFileB.remove(false);
+    gFileB = null;
+  }
+  gScratchpad = null;
+});
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug690552_display_outputs_errors.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug690552_display_outputs_errors.js
new file mode 100644
index 000000000..637af088e
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug690552_display_outputs_errors.js
@@ -0,0 +1,56 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests, {"state":{"text":""}});
+  }, true);
+
+  content.location = "data:text/html,<p>test that exceptions our output as " +
+      "comments for 'display' and not sent to the console in Scratchpad";
+}
+
+function runTests()
+{
+  let scratchpad = gScratchpadWindow.Scratchpad;
+
+  let message = "\"Hello World!\""
+  let openComment = "\n/*\n";
+  let closeComment = "\n*/";
+  let error = "throw new Error(\"Ouch!\")";
+
+  let tests = [{
+    method: "display",
+    code: message,
+    result: message + openComment + "Hello World!" + closeComment,
+    label: "message display output"
+  },
+  {
+    method: "display",
+    code: error,
+    result: error + openComment + "Exception: Ouch!\n@" +
+            scratchpad.uniqueName + ":1" + closeComment,
+    label: "error display output",
+  },
+  {
+    method: "run",
+    code: message,
+    result: message,
+    label: "message run output",
+  },
+  {
+    method: "run",
+    code: error,
+    result: error + openComment + "Exception: Ouch!\n@" +
+            scratchpad.uniqueName + ":1" + closeComment,
+    label: "error run output",
+  }];
+
+  runAsyncTests(scratchpad, tests).then(finish);
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug714942_goto_line_ui.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug714942_goto_line_ui.js
new file mode 100644
index 000000000..5cbc344db
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug714942_goto_line_ui.js
@@ -0,0 +1,45 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test the 'Jump to line' feature in Scratchpad";
+}
+
+function runTests(aWindow, aScratchpad)
+{
+  let editor = aScratchpad.editor;
+  let text = "foobar bug650345\nBug650345 bazbaz\nfoobar omg\ntest";
+  editor.setText(text);
+  editor.setCaretOffset(0);
+
+  let oldPrompt = Services.prompt;
+  let desiredValue = null;
+  Services.prompt = {
+    prompt: function(aWindow, aTitle, aMessage, aValue) {
+      aValue.value = desiredValue;
+      return true;
+    },
+  };
+
+  desiredValue = 3;
+  EventUtils.synthesizeKey("J", {accelKey: true}, aWindow);
+  is(editor.getCaretOffset(), 34, "caret offset is correct");
+
+  desiredValue = 2;
+  aWindow.goDoCommand("cmd_gotoLine")
+  is(editor.getCaretOffset(), 17, "caret offset is correct (again)");
+
+  Services.prompt = oldPrompt;
+
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug740948_reload_and_run.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug740948_reload_and_run.js
new file mode 100644
index 000000000..354ccbf75
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug740948_reload_and_run.js
@@ -0,0 +1,73 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let DEVTOOLS_CHROME_ENABLED = "devtools.chrome.enabled";
+let EDITOR_TEXT = [
+  "var evt = new CustomEvent('foo', { bubbles: true });",
+  "document.body.innerHTML = 'Modified text';",
+  "window.dispatchEvent(evt);"
+].join("\n");
+
+function test()
+{
+  waitForExplicitFinish();
+  Services.prefs.setBoolPref(DEVTOOLS_CHROME_ENABLED, true);
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,Scratchpad test for bug 740948";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+
+  // Test that Reload And Run command is enabled in the content
+  // context and disabled in the browser context.
+
+  let reloadAndRun = gScratchpadWindow.document.
+    getElementById("sp-cmd-reloadAndRun");
+  ok(reloadAndRun, "Reload And Run command exists");
+  ok(!reloadAndRun.hasAttribute("disabled"),
+      "Reload And Run command is enabled");
+
+  sp.setBrowserContext();
+  ok(reloadAndRun.hasAttribute("disabled"),
+      "Reload And Run command is disabled in the browser context.");
+
+  // Switch back to the content context and run our predefined
+  // code. This code modifies the body of our document and dispatches
+  // a custom event 'foo'. We listen to that event and check the
+  // body to make sure that the page has been reloaded and Scratchpad
+  // code has been executed.
+
+  sp.setContentContext();
+  sp.setText(EDITOR_TEXT);
+
+  let browser = gBrowser.selectedBrowser;
+
+  browser.addEventListener("DOMWindowCreated", function onWindowCreated() {
+    browser.removeEventListener("DOMWindowCreated", onWindowCreated, true);
+
+    browser.contentWindow.addEventListener("foo", function onFoo() {
+      browser.contentWindow.removeEventListener("foo", onFoo, true);
+
+      is(browser.contentWindow.document.body.innerHTML, "Modified text",
+        "After reloading, HTML is different.");
+
+      Services.prefs.clearUserPref(DEVTOOLS_CHROME_ENABLED);
+      finish();
+    }, true);
+  }, true);
+
+  ok(browser.contentWindow.document.body.innerHTML !== "Modified text",
+      "Before reloading, HTML is intact.");
+  sp.reloadAndRun();
+}
+
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug756681_display_non_error_exceptions.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug756681_display_non_error_exceptions.js
new file mode 100644
index 000000000..894af5ffd
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug756681_display_non_error_exceptions.js
@@ -0,0 +1,107 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests, {"state":{"text":""}});
+  }, true);
+
+  content.location = "data:text/html, test that exceptions are output as " +
+      "comments correctly in Scratchpad";
+}
+
+function runTests()
+{
+  var scratchpad = gScratchpadWindow.Scratchpad;
+
+  var message = "\"Hello World!\""
+  var openComment = "\n/*\n";
+  var closeComment = "\n*/";
+  var error1 = "throw new Error(\"Ouch!\")";
+  var error2 = "throw \"A thrown string\"";
+  var error3 = "throw {}";
+  var error4 = "document.body.appendChild(document.body)";
+
+  let tests = [{
+    // Display message
+    method: "display",
+    code: message,
+    result: message + openComment + "Hello World!" + closeComment,
+    label: "message display output"
+  },
+  {
+    // Display error1, throw new Error("Ouch")
+    method: "display",
+    code: error1,
+    result: error1 + openComment +
+            "Exception: Ouch!\n@" + scratchpad.uniqueName + ":1" + closeComment,
+    label: "error display output"
+  },
+  {
+    // Display error2, throw "A thrown string"
+    method: "display",
+    code: error2,
+    result: error2 + openComment + "Exception: A thrown string" + closeComment,
+    label: "thrown string display output"
+  },
+  {
+    // Display error3, throw {}
+    method: "display",
+    code: error3,
+    result: error3 + openComment + "Exception: [object Object]" + closeComment,
+    label: "thrown object display output"
+  },
+  {
+    // Display error4, document.body.appendChild(document.body)
+    method: "display",
+    code: error4,
+    result: error4 + openComment + "Exception: Node cannot be inserted " +
+            "at the specified point in the hierarchy\n@1" + closeComment,
+    label: "Alternative format error display output"
+  },
+  {
+    // Run message
+    method: "run",
+    code: message,
+    result: message,
+    label: "message run output"
+  },
+  {
+    // Run error1, throw new Error("Ouch")
+    method: "run",
+    code: error1,
+    result: error1 + openComment +
+            "Exception: Ouch!\n@" + scratchpad.uniqueName + ":1" + closeComment,
+    label: "error run output"
+  },
+  {
+    // Run error2, throw "A thrown string"
+    method: "run",
+    code: error2,
+    result: error2 + openComment + "Exception: A thrown string" + closeComment,
+    label: "thrown string run output"
+  },
+  {
+    // Run error3, throw {}
+    method: "run",
+    code: error3,
+    result: error3 + openComment + "Exception: [object Object]" + closeComment,
+    label: "thrown object run output"
+  },
+  {
+    // Run error4, document.body.appendChild(document.body)
+    method: "run",
+    code: error4,
+    result: error4 + openComment + "Exception: Node cannot be inserted " +
+            "at the specified point in the hierarchy\n@1" + closeComment,
+    label: "Alternative format error run output"
+  }];
+
+  runAsyncTests(scratchpad, tests).then(finish);
+}
\ No newline at end of file
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_644413_modeline.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_644413_modeline.js
new file mode 100644
index 000000000..54d5e835a
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_644413_modeline.js
@@ -0,0 +1,92 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+
+
+let gScratchpad; // Reference to the Scratchpad object.
+let gFile; // Reference to the temporary nsIFile we will work with.
+let DEVTOOLS_CHROME_ENABLED = "devtools.chrome.enabled";
+
+// The temporary file content.
+let gFileContent = "function main() { return 0; }";
+
+function test() {
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test file open and save in Scratchpad";
+}
+
+function runTests() {
+  gScratchpad = gScratchpadWindow.Scratchpad;
+  function size(obj) { return Object.keys(obj).length; }
+
+  // Test Scratchpad._scanModeLine method.
+  let obj = gScratchpad._scanModeLine();
+  is(size(obj), 0, "Mode-line object has no properties");
+
+  obj = gScratchpad._scanModeLine("/* This is not a mode-line comment */");
+  is(size(obj), 0, "Mode-line object has no properties");
+
+  obj = gScratchpad._scanModeLine("/* -sp-context:browser */");
+  is(size(obj), 1, "Mode-line object has one property");
+  is(obj["-sp-context"], "browser");
+
+  obj = gScratchpad._scanModeLine("/* -sp-context: browser */");
+  is(size(obj), 1, "Mode-line object has one property");
+  is(obj["-sp-context"], "browser");
+
+  obj = gScratchpad._scanModeLine("// -sp-context: browser");
+  is(size(obj), 1, "Mode-line object has one property");
+  is(obj["-sp-context"], "browser");
+
+  obj = gScratchpad._scanModeLine("/* -sp-context:browser, other:true */");
+  is(size(obj), 2, "Mode-line object has two properties");
+  is(obj["-sp-context"], "browser");
+  is(obj["other"], "true");
+
+  // Test importing files with a mode-line in them.
+  let content = "/* -sp-context:browser */\n" + gFileContent;
+  createTempFile("fileForBug644413.tmp", content, function(aStatus, aFile) {
+    ok(Components.isSuccessCode(aStatus), "File was saved successfully");
+
+    gFile = aFile;
+    gScratchpad.importFromFile(gFile.QueryInterface(Ci.nsILocalFile), true, fileImported);
+  });
+}
+
+function fileImported(status, content) {
+  ok(Components.isSuccessCode(status), "File was imported successfully");
+
+  // Since devtools.chrome.enabled is off, Scratchpad should still be in
+  // the content context.
+  is(gScratchpad.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_CONTENT);
+
+  // Set the pref and try again.
+  Services.prefs.setBoolPref(DEVTOOLS_CHROME_ENABLED, true);
+
+  gScratchpad.importFromFile(gFile.QueryInterface(Ci.nsILocalFile), true, function(status, content) {
+    ok(Components.isSuccessCode(status), "File was imported successfully");
+    is(gScratchpad.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_BROWSER);
+
+    gFile.remove(false);
+    gFile = null;
+    gScratchpad = null;
+    finish();
+  });
+}
+
+registerCleanupFunction(function () {
+  Services.prefs.clearUserPref(DEVTOOLS_CHROME_ENABLED);
+});
\ No newline at end of file
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_646070_chrome_context_pref.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_646070_chrome_context_pref.js
new file mode 100644
index 000000000..28f6b08fe
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_646070_chrome_context_pref.js
@@ -0,0 +1,51 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let DEVTOOLS_CHROME_ENABLED = "devtools.chrome.enabled";
+
+function test()
+{
+  waitForExplicitFinish();
+
+  Services.prefs.setBoolPref(DEVTOOLS_CHROME_ENABLED, true);
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+
+    ok(window.Scratchpad, "Scratchpad variable exists");
+
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,Scratchpad test for bug 646070 - chrome context preference";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+
+  let environmentMenu = gScratchpadWindow.document.
+                          getElementById("sp-environment-menu");
+  ok(environmentMenu, "Environment menu element exists");
+  ok(!environmentMenu.hasAttribute("hidden"),
+     "Environment menu is visible");
+
+  let errorConsoleCommand = gScratchpadWindow.document.
+                            getElementById("sp-cmd-errorConsole");
+  ok(errorConsoleCommand, "Error console command element exists");
+  ok(!errorConsoleCommand.hasAttribute("disabled"),
+     "Error console command is enabled");
+
+  let chromeContextCommand = gScratchpadWindow.document.
+                            getElementById("sp-cmd-browserContext");
+  ok(chromeContextCommand, "Chrome context command element exists");
+  ok(!chromeContextCommand.hasAttribute("disabled"),
+     "Chrome context command is disabled");
+
+  Services.prefs.clearUserPref(DEVTOOLS_CHROME_ENABLED);
+
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_650760_help_key.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_650760_help_key.js
new file mode 100644
index 000000000..faf5d2994
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_650760_help_key.js
@@ -0,0 +1,60 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  content.location = "data:text/html,Test keybindings for opening Scratchpad MDN Documentation, bug 650760";
+  gBrowser.selectedBrowser.addEventListener("load", function onTabLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onTabLoad, true);
+
+    ok(window.Scratchpad, "Scratchpad variable exists");
+
+    openScratchpad(runTest);
+  }, true);
+}
+
+function runTest()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+  ok(sp.editor.hasFocus(), "the editor has focus");
+
+  let keyid = gScratchpadWindow.document.getElementById("key_openHelp");
+  let modifiers = keyid.getAttribute("modifiers");
+
+  let key = null;
+  if (keyid.getAttribute("keycode"))
+    key = keyid.getAttribute("keycode");
+
+  else if (keyid.getAttribute("key"))
+    key = keyid.getAttribute("key");
+
+  isnot(key, null, "Successfully retrieved keycode/key");
+
+  var aEvent = {
+    shiftKey: modifiers.match("shift"),
+    ctrlKey: modifiers.match("ctrl"),
+    altKey: modifiers.match("alt"),
+    metaKey: modifiers.match("meta"),
+    accelKey: modifiers.match("accel")
+  }
+
+  info("check that the MDN page is opened on \"F1\"");
+  let linkClicked = false;
+  sp.openDocumentationPage = function(event) { linkClicked = true; };
+
+  EventUtils.synthesizeKey(key, aEvent, gScratchpadWindow);
+
+  is(linkClicked, true, "MDN page will open");
+  finishTest();
+}
+
+function finishTest()
+{
+  gScratchpadWindow.close();
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_651942_recent_files.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_651942_recent_files.js
new file mode 100644
index 000000000..3ab397650
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_651942_recent_files.js
@@ -0,0 +1,355 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+
+// Reference to the Scratchpad object.
+let gScratchpad;
+
+// References to the temporary nsIFiles.
+let gFile01;
+let gFile02;
+let gFile03;
+let gFile04;
+
+// lists of recent files.
+var lists = {
+  recentFiles01: null,
+  recentFiles02: null,
+  recentFiles03: null,
+  recentFiles04: null,
+};
+
+// Temporary file names.
+let gFileName01 = "file01_ForBug651942.tmp"
+let gFileName02 = "☕" // See bug 783858 for more information
+let gFileName03 = "file03_ForBug651942.tmp"
+let gFileName04 = "file04_ForBug651942.tmp"
+
+// Content for the temporary files.
+let gFileContent;
+let gFileContent01 = "hello.world.01('bug651942');";
+let gFileContent02 = "hello.world.02('bug651942');";
+let gFileContent03 = "hello.world.03('bug651942');";
+let gFileContent04 = "hello.world.04('bug651942');";
+
+function startTest()
+{
+  gScratchpad = gScratchpadWindow.Scratchpad;
+
+  gFile01 = createAndLoadTemporaryFile(gFile01, gFileName01, gFileContent01);
+  gFile02 = createAndLoadTemporaryFile(gFile02, gFileName02, gFileContent02);
+  gFile03 = createAndLoadTemporaryFile(gFile03, gFileName03, gFileContent03);
+}
+
+// Test to see if the three files we created in the 'startTest()'-method have
+// been added to the list of recent files.
+function testAddedToRecent()
+{
+  lists.recentFiles01 = gScratchpad.getRecentFiles();
+
+  is(lists.recentFiles01.length, 3,
+     "Temporary files created successfully and added to list of recent files.");
+
+  // Create a 4th file, this should clear the oldest file.
+  gFile04 = createAndLoadTemporaryFile(gFile04, gFileName04, gFileContent04);
+}
+
+// We have opened a 4th file. Test to see if the oldest recent file was removed,
+// and that the other files were reordered successfully.
+function testOverwriteRecent()
+{
+  lists.recentFiles02 = gScratchpad.getRecentFiles();
+
+  is(lists.recentFiles02[0], lists.recentFiles01[1],
+     "File02 was reordered successfully in the 'recent files'-list.");
+  is(lists.recentFiles02[1], lists.recentFiles01[2],
+     "File03 was reordered successfully in the 'recent files'-list.");
+  isnot(lists.recentFiles02[2], lists.recentFiles01[2],
+        "File04: was added successfully.");
+
+  // Open the oldest recent file.
+  gScratchpad.openFile(0);
+}
+
+// We have opened the "oldest"-recent file. Test to see if it is now the most
+// recent file, and that the other files were reordered successfully.
+function testOpenOldestRecent()
+{
+  lists.recentFiles03 = gScratchpad.getRecentFiles();
+
+  is(lists.recentFiles02[0], lists.recentFiles03[2],
+     "File04 was reordered successfully in the 'recent files'-list.");
+  is(lists.recentFiles02[1], lists.recentFiles03[0],
+     "File03 was reordered successfully in the 'recent files'-list.");
+  is(lists.recentFiles02[2], lists.recentFiles03[1],
+     "File02 was reordered successfully in the 'recent files'-list.");
+
+  Services.prefs.setIntPref("devtools.scratchpad.recentFilesMax", 0);
+}
+
+// The "devtools.scratchpad.recentFilesMax"-preference was set to zero (0).
+// This should disable the "Open Recent"-menu by hiding it (this should not
+// remove any files from the list). Test to see if it's been hidden.
+function testHideMenu()
+{
+  let menu = gScratchpadWindow.document.getElementById("sp-open_recent-menu");
+  ok(menu.hasAttribute("hidden"), "The menu was hidden successfully.");
+
+  Services.prefs.setIntPref("devtools.scratchpad.recentFilesMax", 2);
+}
+
+// We have set the recentFilesMax-pref to one (1), this enables the feature,
+// removes the two oldest files, rebuilds the menu and removes the
+// "hidden"-attribute from it. Test to see if this works.
+function testChangedMaxRecent()
+{
+  let menu = gScratchpadWindow.document.getElementById("sp-open_recent-menu");
+  ok(!menu.hasAttribute("hidden"), "The menu is visible. \\o/");
+
+  lists.recentFiles04 = gScratchpad.getRecentFiles();
+
+  is(lists.recentFiles04.length, 2,
+     "Two recent files were successfully removed from the 'recent files'-list");
+
+  let doc = gScratchpadWindow.document;
+  let popup = doc.getElementById("sp-menu-open_recentPopup");
+
+  let menuitemLabel = popup.children[0].getAttribute("label");
+  let correctMenuItem = false;
+  if (menuitemLabel === lists.recentFiles03[2] &&
+      menuitemLabel === lists.recentFiles04[1]) {
+    correctMenuItem = true;
+  }
+
+  is(correctMenuItem, true,
+     "Two recent files were successfully removed from the 'Open Recent'-menu");
+
+  // We now remove one file from the harddrive and use the recent-menuitem for
+  // it to make sure the user is notified that the file no longer exists.
+  // This is tested in testOpenDeletedFile().
+  gFile04.remove(false);
+
+  // Make sure the file has been deleted before continuing to avoid
+  // intermittent oranges.
+  waitForFileDeletion();
+}
+
+function waitForFileDeletion() {
+  if (gFile04.exists()) {
+    executeSoon(waitForFileDeletion);
+    return;
+  }
+
+  gFile04 = null;
+  gScratchpad.openFile(0);
+}
+
+// By now we should have two recent files stored in the list but one of the
+// files should be missing on the harddrive.
+function testOpenDeletedFile() {
+  let doc = gScratchpadWindow.document;
+  let popup = doc.getElementById("sp-menu-open_recentPopup");
+
+  is(gScratchpad.getRecentFiles().length, 1,
+     "The missing file was successfully removed from the list.");
+  // The number of recent files stored, plus the separator and the
+  // clearRecentMenuItems-item.
+  is(popup.children.length, 3,
+     "The missing file was successfully removed from the menu.");
+  ok(gScratchpad.notificationBox.currentNotification,
+     "The notification was successfully displayed.");
+  is(gScratchpad.notificationBox.currentNotification.label,
+     gScratchpad.strings.GetStringFromName("fileNoLongerExists.notification"),
+     "The notification label is correct.");
+
+  gScratchpad.clearRecentFiles();
+}
+
+// We have cleared the last file. Test to see if the last file was removed,
+// the menu is empty and was disabled successfully.
+function testClearedAll()
+{
+  let doc = gScratchpadWindow.document;
+  let menu = doc.getElementById("sp-open_recent-menu");
+  let popup = doc.getElementById("sp-menu-open_recentPopup");
+
+  is(gScratchpad.getRecentFiles().length, 0,
+     "All recent files removed successfully.");
+  is(popup.children.length, 0, "All menuitems removed successfully.");
+  ok(menu.hasAttribute("disabled"),
+     "No files in the menu, it was disabled successfully.");
+
+  finishTest();
+}
+
+function createAndLoadTemporaryFile(aFile, aFileName, aFileContent)
+{
+  // Create a temporary file.
+  aFile = FileUtils.getFile("TmpD", [aFileName]);
+  aFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);
+
+  // Write the temporary file.
+  let fout = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  fout.init(aFile.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            0644, fout.DEFER_OPEN);
+
+  gScratchpad.setFilename(aFile.path);
+  gScratchpad.importFromFile(aFile.QueryInterface(Ci.nsILocalFile),  true,
+                            fileImported);
+  gScratchpad.saveFile(fileSaved);
+
+  return aFile;
+}
+
+function fileImported(aStatus)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was imported successfully with Scratchpad");
+}
+
+function fileSaved(aStatus)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was saved successfully with Scratchpad");
+
+  checkIfMenuIsPopulated();
+}
+
+function checkIfMenuIsPopulated()
+{
+  let doc = gScratchpadWindow.document;
+  let expectedMenuitemCount = doc.getElementById("sp-menu-open_recentPopup").
+                              children.length;
+  // The number of recent files stored, plus the separator and the
+  // clearRecentMenuItems-item.
+  let recentFilesPlusExtra = gScratchpad.getRecentFiles().length + 2;
+
+  if (expectedMenuitemCount > 2) {
+    is(expectedMenuitemCount, recentFilesPlusExtra,
+       "the recent files menu was populated successfully.");
+  }
+}
+
+/**
+ * The PreferenceObserver listens for preference changes while Scratchpad is
+ * running.
+ */
+var PreferenceObserver = {
+  _initialized: false,
+
+  _timesFired: 0,
+  set timesFired(aNewValue) {
+    this._timesFired = aNewValue;
+  },
+  get timesFired() {
+    return this._timesFired;
+  },
+
+  init: function PO_init()
+  {
+    if (this._initialized) {
+      return;
+    }
+
+    this.branch = Services.prefs.getBranch("devtools.scratchpad.");
+    this.branch.addObserver("", this, false);
+    this._initialized = true;
+  },
+
+  observe: function PO_observe(aMessage, aTopic, aData)
+  {
+    if (aTopic != "nsPref:changed") {
+      return;
+    }
+
+    switch (this.timesFired) {
+      case 0:
+        this.timesFired = 1;
+        break;
+      case 1:
+        this.timesFired = 2;
+        break;
+      case 2:
+        this.timesFired = 3;
+        testAddedToRecent();
+        break;
+      case 3:
+        this.timesFired = 4;
+        testOverwriteRecent();
+        break;
+      case 4:
+        this.timesFired = 5;
+        testOpenOldestRecent();
+        break;
+      case 5:
+        this.timesFired = 6;
+        testHideMenu();
+        break;
+      case 6:
+        this.timesFired = 7;
+        testChangedMaxRecent();
+        break;
+      case 7:
+        this.timesFired = 8;
+        testOpenDeletedFile();
+        break;
+      case 8:
+        this.timesFired = 9;
+        testClearedAll();
+        break;
+    }
+  },
+
+  uninit: function PO_uninit () {
+    this.branch.removeObserver("", this);
+  }
+};
+
+function test()
+{
+  waitForExplicitFinish();
+
+  registerCleanupFunction(function () {
+    gFile01.remove(false);
+    gFile01 = null;
+    gFile02.remove(false);
+    gFile02 = null;
+    gFile03.remove(false);
+    gFile03 = null;
+    // gFile04 was removed earlier.
+    lists.recentFiles01 = null;
+    lists.recentFiles02 = null;
+    lists.recentFiles03 = null;
+    lists.recentFiles04 = null;
+    gScratchpad = null;
+
+    PreferenceObserver.uninit();
+    Services.prefs.clearUserPref("devtools.scratchpad.recentFilesMax");
+  });
+
+  Services.prefs.setIntPref("devtools.scratchpad.recentFilesMax", 3);
+
+  // Initiate the preference observer after we have set the temporary recent
+  // files max for this test.
+  PreferenceObserver.init();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(startTest);
+  }, true);
+
+  content.location = "data:text/html,<p>test recent files in Scratchpad";
+}
+
+function finishTest()
+{
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_653427_confirm_close.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_653427_confirm_close.js
new file mode 100644
index 000000000..cbcaf0ddf
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_653427_confirm_close.js
@@ -0,0 +1,227 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+
+// only finish() when correct number of tests are done
+const expected = 9;
+var count = 0;
+function done()
+{
+  if (++count == expected) {
+    cleanup();
+    finish();
+  }
+}
+
+var gFile;
+
+var oldPrompt = Services.prompt;
+var promptButton = -1;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gFile = createTempFile("fileForBug653427.tmp");
+  writeFile(gFile, "text", testUnsaved.call(this));
+
+  Services.prompt = {
+    confirmEx: function() {
+      return promptButton;
+    }
+  };
+
+  testNew();
+  testSavedFile();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  content.location = "data:text/html,<p>test scratchpad save file prompt on closing";
+}
+
+function testNew()
+{
+  openScratchpad(function(win) {
+    win.Scratchpad.close(function() {
+      ok(win.closed, "new scratchpad window should close without prompting")
+      done();
+    });
+  }, {noFocus: true});
+}
+
+function testSavedFile()
+{
+  openScratchpad(function(win) {
+    win.Scratchpad.filename = "test.js";
+    win.Scratchpad.editor.dirty = false;
+    win.Scratchpad.close(function() {
+      ok(win.closed, "scratchpad from file with no changes should close")
+      done();
+    });
+  }, {noFocus: true});
+}
+
+function testUnsaved()
+{
+  function setFilename(aScratchpad, aFile) {
+    aScratchpad.setFilename(aFile);
+  }
+
+  testUnsavedFileCancel(setFilename);
+  testUnsavedFileSave(setFilename);
+  testUnsavedFileDontSave(setFilename);
+  testCancelAfterLoad();
+
+  function mockSaveFile(aScratchpad) {
+    let SaveFileStub = function (aCallback) {
+      /*
+       * An argument for aCallback must pass Components.isSuccessCode
+       *
+       * A version of isSuccessCode in JavaScript:
+       *  function isSuccessCode(returnCode) {
+       *    return (returnCode & 0x80000000) == 0;
+       *  }
+       */
+      aCallback(1);
+    };
+
+    aScratchpad.saveFile = SaveFileStub;
+  }
+
+  // Run these tests again but this time without setting a filename to
+  // test that Scratchpad always asks for confirmation on dirty editor.
+  testUnsavedFileCancel(mockSaveFile);
+  testUnsavedFileSave(mockSaveFile);
+  testUnsavedFileDontSave();
+}
+
+function testUnsavedFileCancel(aCallback=function () {})
+{
+  openScratchpad(function(win) {
+    aCallback(win.Scratchpad, "test.js");
+    win.Scratchpad.editor.dirty = true;
+
+    promptButton = win.BUTTON_POSITION_CANCEL;
+
+    win.Scratchpad.close(function() {
+      ok(!win.closed, "cancelling dialog shouldn't close scratchpad");
+      win.close();
+      done();
+    });
+  }, {noFocus: true});
+}
+
+// Test a regression where our confirmation dialog wasn't appearing
+// after openFile calls. See bug 801982.
+function testCancelAfterLoad()
+{
+  openScratchpad(function(win) {
+    win.Scratchpad.setRecentFile(gFile);
+    win.Scratchpad.openFile(0);
+    win.Scratchpad.editor.dirty = true;
+    promptButton = win.BUTTON_POSITION_CANCEL;
+
+    let EventStub = {
+      called: false,
+      preventDefault: function() {
+        EventStub.called = true;
+      }
+    };
+
+    win.Scratchpad.onClose(EventStub, function() {
+      ok(!win.closed, "cancelling dialog shouldn't close scratchpad");
+      ok(EventStub.called, "aEvent.preventDefault was called");
+
+      win.Scratchpad.editor.dirty = false;
+      win.close();
+      done();
+    });
+  }, {noFocus: true});
+}
+
+function testUnsavedFileSave(aCallback=function () {})
+{
+  openScratchpad(function(win) {
+    win.Scratchpad.importFromFile(gFile, true, function(status, content) {
+      aCallback(win.Scratchpad, gFile.path);
+
+      let text = "new text";
+      win.Scratchpad.setText(text);
+
+      promptButton = win.BUTTON_POSITION_SAVE;
+
+      win.Scratchpad.close(function() {
+        ok(win.closed, 'pressing "Save" in dialog should close scratchpad');
+        readFile(gFile, function(savedContent) {
+          is(savedContent, text, 'prompted "Save" worked when closing scratchpad');
+          done();
+        });
+      });
+    });
+  }, {noFocus: true});
+}
+
+function testUnsavedFileDontSave(aCallback=function () {})
+{
+  openScratchpad(function(win) {
+    aCallback(win.Scratchpad, gFile.path);
+    win.Scratchpad.editor.dirty = true;
+
+    promptButton = win.BUTTON_POSITION_DONT_SAVE;
+
+    win.Scratchpad.close(function() {
+      ok(win.closed, 'pressing "Don\'t Save" in dialog should close scratchpad');
+      done();
+    });
+  }, {noFocus: true});
+}
+
+function cleanup()
+{
+  Services.prompt = oldPrompt;
+  gFile.remove(false);
+  gFile = null;
+}
+
+function createTempFile(name)
+{
+  let file = FileUtils.getFile("TmpD", [name]);
+  file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);
+  file.QueryInterface(Ci.nsILocalFile)
+  return file;
+}
+
+function writeFile(file, content, callback)
+{
+  let fout = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  fout.init(file.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            0644, fout.DEFER_OPEN);
+
+  let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+                  createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = "UTF-8";
+  let fileContentStream = converter.convertToInputStream(content);
+
+  NetUtil.asyncCopy(fileContentStream, fout, callback);
+}
+
+function readFile(file, callback)
+{
+  let channel = NetUtil.newChannel(file);
+  channel.contentType = "application/javascript";
+
+  NetUtil.asyncFetch(channel, function(inputStream, status) {
+    ok(Components.isSuccessCode(status),
+       "file was read successfully");
+
+    let content = NetUtil.readInputStreamToString(inputStream,
+                                                  inputStream.available());
+    callback(content);
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_660560_tab.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_660560_tab.js
new file mode 100644
index 000000000..3687c8173
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_660560_tab.js
@@ -0,0 +1,81 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onTabLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onTabLoad, true);
+
+    ok(window.Scratchpad, "Scratchpad variable exists");
+
+    Services.prefs.setIntPref("devtools.editor.tabsize", 5);
+
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,Scratchpad test for the Tab key, bug 660560";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+
+  ok(sp.editor.hasFocus(), "the editor has focus");
+
+  sp.setText("window.foo;");
+  sp.editor.setCaretOffset(0);
+
+  EventUtils.synthesizeKey("VK_TAB", {}, gScratchpadWindow);
+
+  is(sp.getText(), "     window.foo;", "Tab key added 5 spaces");
+
+  is(sp.editor.getCaretOffset(), 5, "caret location is correct");
+
+  sp.editor.setCaretOffset(6);
+
+  EventUtils.synthesizeKey("VK_TAB", {}, gScratchpadWindow);
+
+  is(sp.getText(), "     w    indow.foo;",
+     "Tab key added 4 spaces");
+
+  is(sp.editor.getCaretOffset(), 10, "caret location is correct");
+
+  // Test the new insertTextAtCaret() method.
+
+  sp.insertTextAtCaret("omg");
+
+  is(sp.getText(), "     w    omgindow.foo;", "insertTextAtCaret() works");
+
+  is(sp.editor.getCaretOffset(), 13, "caret location is correct after update");
+
+  gScratchpadWindow.close();
+
+  Services.prefs.setIntPref("devtools.editor.tabsize", 6);
+  Services.prefs.setBoolPref("devtools.editor.expandtab", false);
+
+  openScratchpad(runTests2);
+}
+
+function runTests2()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+
+  sp.setText("window.foo;");
+  sp.editor.setCaretOffset(0);
+
+  EventUtils.synthesizeKey("VK_TAB", {}, gScratchpadWindow);
+
+  is(sp.getText(), "\twindow.foo;", "Tab key added the tab character");
+
+  is(sp.editor.getCaretOffset(), 1, "caret location is correct");
+
+  Services.prefs.clearUserPref("devtools.editor.tabsize");
+  Services.prefs.clearUserPref("devtools.editor.expandtab");
+
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_661762_wrong_window_focus.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_661762_wrong_window_focus.js
new file mode 100644
index 000000000..94342b048
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_661762_wrong_window_focus.js
@@ -0,0 +1,94 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource:///modules/HUDService.jsm", tempScope);
+let HUDService = tempScope.HUDService;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  // To test for this bug we open a Scratchpad window, save its
+  // reference and then open another one. This way the first window
+  // loses its focus.
+  //
+  // Then we open a web console and execute a console.log statement
+  // from the first Scratch window (that's why we needed to save its
+  // reference).
+  //
+  // Then we wait for our message to appear in the console and click
+  // on the location link. After that we check which Scratchpad window
+  // is currently active (it should be the older one).
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+
+    openScratchpad(function () {
+      let sw = gScratchpadWindow;
+
+      openScratchpad(function () {
+        function onWebConsoleOpen(subj) {
+          Services.obs.removeObserver(onWebConsoleOpen,
+            "web-console-created");
+          subj.QueryInterface(Ci.nsISupportsString);
+
+          let hud = HUDService.getHudReferenceById(subj.data);
+          hud.jsterm.clearOutput(true);
+          executeSoon(testFocus.bind(null, sw, hud));
+        }
+
+        Services.obs.
+          addObserver(onWebConsoleOpen, "web-console-created", false);
+
+        HUDService.consoleUI.toggleHUD();
+      });
+    });
+  }, true);
+
+  content.location = "data:text/html;charset=utf8,<p>test window focus for Scratchpad.";
+}
+
+function testFocus(sw, hud) {
+  let sp = sw.Scratchpad;
+
+  function onMessage(subj) {
+    Services.obs.removeObserver(onMessage, "web-console-message-created");
+
+    var loc = hud.jsterm.outputNode.querySelector(".webconsole-location");
+    ok(loc, "location element exists");
+    is(loc.value, sw.Scratchpad.uniqueName + ":1",
+        "location value is correct");
+
+    sw.addEventListener("focus", function onFocus() {
+      sw.removeEventListener("focus", onFocus, true);
+
+      let win = Services.wm.getMostRecentWindow("devtools:scratchpad");
+
+      ok(win, "there are active Scratchpad windows");
+      is(win.Scratchpad.uniqueName, sw.Scratchpad.uniqueName,
+          "correct window is in focus");
+
+      // gScratchpadWindow will be closed automatically but we need to
+      // close the second window ourselves.
+      sw.close();
+      finish();
+    }, true);
+
+    // Simulate a click on the "Scratchpad/N:1" link.
+    EventUtils.synthesizeMouse(loc, 2, 2, {}, hud.iframeWindow);
+  }
+
+  // Sending messages to web console is an asynchronous operation. That's
+  // why we have to setup an observer here.
+  Services.obs.addObserver(onMessage, "web-console-message-created", false);
+
+  sp.setText("console.log('foo');");
+  sp.run().then(function ([selection, error, result]) {
+    is(selection, "console.log('foo');", "selection is correct");
+    is(error, undefined, "error is correct");
+    is(result, undefined, "result is correct");
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_669612_unsaved.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_669612_unsaved.js
new file mode 100644
index 000000000..15d4bb615
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_669612_unsaved.js
@@ -0,0 +1,120 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// only finish() when correct number of tests are done
+const expected = 4;
+var count = 0;
+function done()
+{
+  if (++count == expected) {
+    finish();
+  }
+}
+
+var ScratchpadManager = Scratchpad.ScratchpadManager;
+
+
+function test()
+{
+  waitForExplicitFinish();
+
+  testListeners();
+  testRestoreNotFromFile();
+  testRestoreFromFileSaved();
+  testRestoreFromFileUnsaved();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  content.location = "data:text/html,<p>test star* UI for unsaved file changes";
+}
+
+function testListeners()
+{
+  openScratchpad(function(aWin, aScratchpad) {
+    aScratchpad.setText("new text");
+    ok(isStar(aWin), "show start if scratchpad text changes");
+
+    aScratchpad.editor.dirty = false;
+    ok(!isStar(aWin), "no star before changing text");
+
+    aScratchpad.setFilename("foo.js");
+    aScratchpad.setText("new text2");
+    ok(isStar(aWin), "shows star if scratchpad text changes");
+
+    aScratchpad.editor.dirty = false;
+    ok(!isStar(aWin), "no star if scratchpad was just saved");
+
+    aScratchpad.setText("new text3");
+    ok(isStar(aWin), "shows star if scratchpad has more changes");
+
+    aScratchpad.undo();
+    ok(!isStar(aWin), "no star if scratchpad undo to save point");
+
+    aScratchpad.undo();
+    ok(isStar(aWin), "star if scratchpad undo past save point");
+
+    aWin.close();
+    done();
+  }, {noFocus: true});
+}
+
+function testRestoreNotFromFile()
+{
+  let session = [{
+    text: "test1",
+    executionContext: 1
+  }];
+
+  let [win] = ScratchpadManager.restoreSession(session);
+  openScratchpad(function(aWin, aScratchpad) {
+    aScratchpad.setText("new text");
+    ok(isStar(win), "show star if restored scratchpad isn't from a file");
+
+    win.close();
+    done();
+  }, {window: win, noFocus: true});
+}
+
+function testRestoreFromFileSaved()
+{
+  let session = [{
+    filename: "test.js",
+    text: "test1",
+    executionContext: 1,
+    saved: true
+  }];
+
+  let [win] = ScratchpadManager.restoreSession(session);
+  openScratchpad(function(aWin, aScratchpad) {
+    ok(!isStar(win), "no star before changing text in scratchpad restored from file");
+
+    aScratchpad.setText("new text");
+    ok(isStar(win), "star when text changed from scratchpad restored from file");
+
+    win.close();
+    done();
+  }, {window: win, noFocus: true});
+}
+
+function testRestoreFromFileUnsaved()
+{
+  let session = [{
+    filename: "test.js",
+    text: "test1",
+    executionContext: 1,
+    saved: false
+  }];
+
+  let [win] = ScratchpadManager.restoreSession(session);
+  openScratchpad(function() {
+    ok(isStar(win), "star with scratchpad restored with unsaved text");
+
+    win.close();
+    done();
+  }, {window: win, noFocus: true});
+}
+
+function isStar(win)
+{
+  return win.document.title.match(/^\*[^\*]/);
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_679467_falsy.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_679467_falsy.js
new file mode 100644
index 000000000..08785a76b
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_679467_falsy.js
@@ -0,0 +1,68 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(testFalsy);
+  }, true);
+
+  content.location = "data:text/html,<p>test falsy display() values in Scratchpad";
+}
+
+function testFalsy()
+{
+  let scratchpad = gScratchpadWindow.Scratchpad;
+  verifyFalsies(scratchpad).then(function() {
+    scratchpad.setBrowserContext();
+    verifyFalsies(scratchpad).then(finish);
+  });
+}
+
+
+function verifyFalsies(scratchpad)
+{
+  let tests = [{
+    method: "display",
+    code: "undefined",
+    result: "undefined\n/*\nundefined\n*/",
+    label: "undefined is displayed"
+  },
+  {
+    method: "display",
+    code: "false",
+    result: "false\n/*\nfalse\n*/",
+    label: "false is displayed"
+  },
+  {
+    method: "display",
+    code: "0",
+    result: "0\n/*\n0\n*/",
+    label: "0 is displayed"
+  },
+  {
+    method: "display",
+    code: "null",
+    result: "null\n/*\nnull\n*/",
+    label: "null is displayed"
+  },
+  {
+    method: "display",
+    code: "NaN",
+    result: "NaN\n/*\nNaN\n*/",
+    label: "NaN is displayed"
+  },
+  {
+    method: "display",
+    code: "''",
+    result: "''\n/*\n\n*/",
+    label: "the empty string is displayed"
+  }];
+
+  return runAsyncTests(scratchpad, tests);
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_699130_edit_ui_updates.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_699130_edit_ui_updates.js
new file mode 100644
index 000000000..4befa8d69
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_699130_edit_ui_updates.js
@@ -0,0 +1,187 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let tempScope = {};
+Cu.import("resource:///modules/source-editor.jsm", tempScope);
+let SourceEditor = tempScope.SourceEditor;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,test Edit menu updates Scratchpad - bug 699130";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  let doc = gScratchpadWindow.document;
+  let winUtils = gScratchpadWindow.QueryInterface(Ci.nsIInterfaceRequestor).
+                 getInterface(Ci.nsIDOMWindowUtils);
+  let OS = Services.appinfo.OS;
+
+  info("will test the Edit menu");
+
+  let pass = 0;
+
+  sp.setText("bug 699130: hello world! (edit menu)");
+
+  let editMenu = doc.getElementById("sp-edit-menu");
+  ok(editMenu, "the Edit menu");
+  let menubar = editMenu.parentNode;
+  ok(menubar, "menubar found");
+
+  let editMenuIndex = -1;
+  for (let i = 0; i < menubar.children.length; i++) {
+    if (menubar.children[i] === editMenu) {
+      editMenuIndex = i;
+      break;
+    }
+  }
+  isnot(editMenuIndex, -1, "Edit menu index is correct");
+
+  let menuPopup = editMenu.menupopup;
+  ok(menuPopup, "the Edit menupopup");
+  let cutItem = doc.getElementById("se-menu-cut");
+  ok(cutItem, "the Cut menuitem");
+  let pasteItem = doc.getElementById("se-menu-paste");
+  ok(pasteItem, "the Paste menuitem");
+
+  let anchor = doc.documentElement;
+  let isContextMenu = false;
+
+  let openMenu = function(aX, aY, aCallback) {
+    if (!editMenu || OS != "Darwin") {
+      menuPopup.addEventListener("popupshown", function onPopupShown() {
+        menuPopup.removeEventListener("popupshown", onPopupShown, false);
+        executeSoon(aCallback);
+      }, false);
+    }
+
+    executeSoon(function() {
+      if (editMenu) {
+        if (OS == "Darwin") {
+          winUtils.forceUpdateNativeMenuAt(editMenuIndex);
+          executeSoon(aCallback);
+        } else {
+          editMenu.open = true;
+        }
+      } else {
+        menuPopup.openPopup(anchor, "overlap", aX, aY, isContextMenu, false);
+      }
+    });
+  };
+
+  let closeMenu = function(aCallback) {
+    if (!editMenu || OS != "Darwin") {
+      menuPopup.addEventListener("popuphidden", function onPopupHidden() {
+        menuPopup.removeEventListener("popuphidden", onPopupHidden, false);
+        executeSoon(aCallback);
+      }, false);
+    }
+
+    executeSoon(function() {
+      if (editMenu) {
+        if (OS == "Darwin") {
+          winUtils.forceUpdateNativeMenuAt(editMenuIndex);
+          executeSoon(aCallback);
+        } else {
+          editMenu.open = false;
+        }
+      } else {
+        menuPopup.hidePopup();
+      }
+    });
+  };
+
+  let firstShow = function() {
+    ok(cutItem.hasAttribute("disabled"), "cut menuitem is disabled");
+    closeMenu(firstHide);
+  };
+
+  let firstHide = function() {
+    sp.selectRange(0, 10);
+    openMenu(11, 11, showAfterSelect);
+  };
+
+  let showAfterSelect = function() {
+    ok(!cutItem.hasAttribute("disabled"), "cut menuitem is enabled after select");
+    closeMenu(hideAfterSelect);
+  };
+
+  let hideAfterSelect = function() {
+    sp.editor.addEventListener(SourceEditor.EVENTS.TEXT_CHANGED, onCut);
+    waitForFocus(function () {
+      let selectedText = sp.editor.getSelectedText();
+      ok(selectedText.length > 0, "non-empty selected text will be cut");
+
+      EventUtils.synthesizeKey("x", {accelKey: true}, gScratchpadWindow);
+    }, gScratchpadWindow);
+  };
+
+  let onCut = function() {
+    sp.editor.removeEventListener(SourceEditor.EVENTS.TEXT_CHANGED, onCut);
+    openMenu(12, 12, showAfterCut);
+  };
+
+  let showAfterCut = function() {
+    ok(cutItem.hasAttribute("disabled"), "cut menuitem is disabled after cut");
+    ok(!pasteItem.hasAttribute("disabled"), "paste menuitem is enabled after cut");
+    closeMenu(hideAfterCut);
+  };
+
+  let hideAfterCut = function() {
+    sp.editor.addEventListener(SourceEditor.EVENTS.TEXT_CHANGED, onPaste);
+    waitForFocus(function () {
+      EventUtils.synthesizeKey("v", {accelKey: true}, gScratchpadWindow);
+    }, gScratchpadWindow);
+  };
+
+  let onPaste = function() {
+    sp.editor.removeEventListener(SourceEditor.EVENTS.TEXT_CHANGED, onPaste);
+    openMenu(13, 13, showAfterPaste);
+  };
+
+  let showAfterPaste = function() {
+    ok(cutItem.hasAttribute("disabled"), "cut menuitem is disabled after paste");
+    ok(!pasteItem.hasAttribute("disabled"), "paste menuitem is enabled after paste");
+    closeMenu(hideAfterPaste);
+  };
+
+  let hideAfterPaste = function() {
+    if (pass == 0) {
+      pass++;
+      testContextMenu();
+    } else {
+      finish();
+    }
+  };
+
+  let testContextMenu = function() {
+    info("will test the context menu");
+
+    editMenu = null;
+    isContextMenu = true;
+
+    menuPopup = doc.getElementById("scratchpad-text-popup");
+    ok(menuPopup, "the context menupopup");
+    cutItem = doc.getElementById("se-cMenu-cut");
+    ok(cutItem, "the Cut menuitem");
+    pasteItem = doc.getElementById("se-cMenu-paste");
+    ok(pasteItem, "the Paste menuitem");
+
+    sp.setText("bug 699130: hello world! (context menu)");
+    openMenu(10, 10, firstShow);
+  };
+
+  openMenu(10, 10, firstShow);
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_bug_751744_revert_to_saved.js b/browser/devtools/scratchpad/test/browser_scratchpad_bug_751744_revert_to_saved.js
new file mode 100644
index 000000000..9af0ad4f8
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_bug_751744_revert_to_saved.js
@@ -0,0 +1,137 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+
+// Reference to the Scratchpad object.
+let gScratchpad;
+
+// Reference to the temporary nsIFiles.
+let gFile;
+
+// Temporary file name.
+let gFileName = "testFileForBug751744.tmp"
+
+
+// Content for the temporary file.
+let gFileContent = "/* this file is already saved */\n" +
+                   "function foo() { alert('bar') }";
+let gLength = gFileContent.length;
+
+// Reference to the menu entry.
+let menu;
+
+function startTest()
+{
+  gScratchpad = gScratchpadWindow.Scratchpad;
+  menu = gScratchpadWindow.document.getElementById("sp-menu-revert");
+  createAndLoadTemporaryFile();
+}
+
+function testAfterSaved() {
+  // Check if the revert menu is disabled as the file is at saved state.
+  ok(menu.hasAttribute("disabled"), "The revert menu entry is disabled.");
+
+  // chancging the text in the file
+  gScratchpad.setText("\nfoo();", gLength, gLength);
+  // Checking the text got changed
+  is(gScratchpad.getText(), gFileContent + "\nfoo();",
+     "The text changed the first time.");
+
+  // Revert menu now should be enabled.
+  ok(!menu.hasAttribute("disabled"),
+     "The revert menu entry is enabled after changing text first time");
+
+  // reverting back to last saved state.
+  gScratchpad.revertFile(testAfterRevert);
+}
+
+function testAfterRevert() {
+  // Check if the file's text got reverted
+  is(gScratchpad.getText(), gFileContent,
+     "The text reverted back to original text.");
+  // The revert menu should be disabled again.
+  ok(menu.hasAttribute("disabled"),
+     "The revert menu entry is disabled after reverting.");
+
+  // chancging the text in the file again
+  gScratchpad.setText("\nalert(foo.toSource());", gLength, gLength);
+  // Saving the file.
+  gScratchpad.saveFile(testAfterSecondSave);
+}
+
+function testAfterSecondSave() {
+  // revert menu entry should be disabled.
+  ok(menu.hasAttribute("disabled"),
+     "The revert menu entry is disabled after saving.");
+
+  // changing the text.
+  gScratchpad.setText("\nfoo();", gLength + 23, gLength + 23);
+
+  // revert menu entry should get enabled yet again.
+  ok(!menu.hasAttribute("disabled"),
+     "The revert menu entry is enabled after changing text third time");
+
+  // reverting back to last saved state.
+  gScratchpad.revertFile(testAfterSecondRevert);
+}
+
+function testAfterSecondRevert() {
+  // Check if the file's text got reverted
+  is(gScratchpad.getText(), gFileContent + "\nalert(foo.toSource());",
+     "The text reverted back to the changed saved text.");
+  // The revert menu should be disabled again.
+  ok(menu.hasAttribute("disabled"),
+     "Revert menu entry is disabled after reverting to changed saved state.");
+  gFile.remove(false);
+  gFile = null;
+  gScratchpad = null;
+}
+
+function createAndLoadTemporaryFile()
+{
+  // Create a temporary file.
+  gFile = FileUtils.getFile("TmpD", [gFileName]);
+  gFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666);
+
+  // Write the temporary file.
+  let fout = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  fout.init(gFile.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            0644, fout.DEFER_OPEN);
+
+  let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+                  createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = "UTF-8";
+  let fileContentStream = converter.convertToInputStream(gFileContent);
+
+  NetUtil.asyncCopy(fileContentStream, fout, tempFileSaved);
+}
+
+function tempFileSaved(aStatus)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was saved successfully");
+
+  // Import the file into Scratchpad.
+  gScratchpad.setFilename(gFile.path);
+  gScratchpad.importFromFile(gFile.QueryInterface(Ci.nsILocalFile),  true,
+                             testAfterSaved);
+}
+
+function test()
+{
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(startTest);
+  }, true);
+
+  content.location = "data:text/html,<p>test reverting to last saved state of" +
+                     " a file </p>";
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_contexts.js b/browser/devtools/scratchpad/test/browser_scratchpad_contexts.js
new file mode 100644
index 000000000..6c0c684ae
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_contexts.js
@@ -0,0 +1,174 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,test context switch in Scratchpad";
+}
+
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  let contentMenu = gScratchpadWindow.document.getElementById("sp-menu-content");
+  let chromeMenu = gScratchpadWindow.document.getElementById("sp-menu-browser");
+  let notificationBox = sp.notificationBox;
+
+  ok(contentMenu, "found #sp-menu-content");
+  ok(chromeMenu, "found #sp-menu-browser");
+  ok(notificationBox, "found Scratchpad.notificationBox");
+
+  let tests = [{
+    method: "run",
+    prepare: function() {
+      sp.setContentContext();
+
+      is(sp.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_CONTENT,
+         "executionContext is content");
+
+      is(contentMenu.getAttribute("checked"), "true",
+         "content menuitem is checked");
+
+      isnot(chromeMenu.getAttribute("checked"), "true",
+         "chrome menuitem is not checked");
+
+      ok(!notificationBox.currentNotification,
+         "there is no notification in content context");
+
+      let dsp = sp.contentSandbox.__SCRATCHPAD__;
+
+      ok(sp.contentSandbox.__SCRATCHPAD__,
+          "there is a variable named __SCRATCHPAD__");
+
+      ok(sp.contentSandbox.__SCRATCHPAD__.editor,
+          "scratchpad is actually an instance of Scratchpad");
+
+      sp.setText("window.foobarBug636725 = 'aloha';");
+
+      ok(!content.wrappedJSObject.foobarBug636725,
+         "no content.foobarBug636725");
+    },
+    then: function() {
+      is(content.wrappedJSObject.foobarBug636725, "aloha",
+         "content.foobarBug636725 has been set");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.setBrowserContext();
+
+      is(sp.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_BROWSER,
+         "executionContext is chrome");
+
+      is(chromeMenu.getAttribute("checked"), "true",
+         "chrome menuitem is checked");
+
+      isnot(contentMenu.getAttribute("checked"), "true",
+         "content menuitem is not checked");
+
+      ok(sp.chromeSandbox.__SCRATCHPAD__,
+        "there is a variable named __SCRATCHPAD__");
+
+      ok(sp.chromeSandbox.__SCRATCHPAD__.editor,
+          "scratchpad is actually an instance of Scratchpad");
+
+      ok(notificationBox.currentNotification,
+         "there is a notification in browser context");
+
+      sp.setText("2'", 31, 32);
+
+      is(sp.getText(), "window.foobarBug636725 = 'aloha2';",
+         "setText() worked");
+    },
+    then: function() {
+      is(window.foobarBug636725, "aloha2",
+         "window.foobarBug636725 has been set");
+
+      delete window.foobarBug636725;
+      ok(!window.foobarBug636725, "no window.foobarBug636725");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.setText("gBrowser", 7);
+
+      is(sp.getText(), "window.gBrowser",
+         "setText() worked with no end for the replace range");
+    },
+    then: function([, , result]) {
+      is(typeof result.addTab, "function",
+         "chrome context has access to chrome objects");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      // Check that the sandbox is cached.
+      sp.setText("typeof foobarBug636725cache;");
+    },
+    then: function([, , result]) {
+      is(result, "undefined", "global variable does not exist");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.setText("var foobarBug636725cache = 'foo';" +
+                 "typeof foobarBug636725cache;");
+    },
+    then: function([, , result]) {
+      is(result, "string",
+         "global variable exists across two different executions");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.resetContext();
+      sp.setText("typeof foobarBug636725cache;");
+    },
+    then: function([, , result]) {
+      is(result, "undefined",
+         "global variable no longer exists after calling resetContext()");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.setText("var foobarBug636725cache2 = 'foo';" +
+                 "typeof foobarBug636725cache2;");
+    },
+    then: function([, , result]) {
+      is(result, "string",
+         "global variable exists across two different executions");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      sp.setContentContext();
+
+      is(sp.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_CONTENT,
+         "executionContext is content");
+
+      sp.setText("typeof foobarBug636725cache2;");
+    },
+    then: function([, , result]) {
+      is(result, "undefined",
+         "global variable no longer exists after changing the context");
+    }
+  }];
+
+  runAsyncCallbackTests(sp, tests).then(finish);
+}
\ No newline at end of file
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_execute_print.js b/browser/devtools/scratchpad/test/browser_scratchpad_execute_print.js
new file mode 100644
index 000000000..a2c43c3ca
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_execute_print.js
@@ -0,0 +1,138 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onTabLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onTabLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test run() and display() in Scratchpad";
+}
+
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  let tests = [{
+    method: "run",
+    prepare: function() {
+      content.wrappedJSObject.foobarBug636725 = 1;
+      sp.setText("++window.foobarBug636725");
+    },
+    then: function([code, , result]) {
+      is(code, sp.getText(), "code is correct");
+      is(result, content.wrappedJSObject.foobarBug636725,
+         "result is correct");
+
+      is(sp.getText(), "++window.foobarBug636725",
+         "run() does not change the editor content");
+
+      is(content.wrappedJSObject.foobarBug636725, 2,
+         "run() updated window.foobarBug636725");
+    }
+  },
+  {
+    method: "display",
+    prepare: function() {},
+    then: function() {
+      is(content.wrappedJSObject.foobarBug636725, 3,
+         "display() updated window.foobarBug636725");
+
+      is(sp.getText(), "++window.foobarBug636725\n/*\n3\n*/",
+         "display() shows evaluation result in the textbox");
+
+      is(sp.selectedText, "\n/*\n3\n*/", "selectedText is correct");
+    }
+  },
+  {
+    method: "run",
+    prepare: function() {
+      let selection = sp.getSelectionRange();
+      is(selection.start, 24, "selection.start is correct");
+      is(selection.end, 32, "selection.end is correct");
+
+      // Test selection run() and display().
+
+      sp.setText("window.foobarBug636725 = 'a';\n" +
+                 "window.foobarBug636725 = 'b';");
+
+      sp.selectRange(1, 2);
+
+      selection = sp.getSelectionRange();
+
+      is(selection.start, 1, "selection.start is 1");
+      is(selection.end, 2, "selection.end is 2");
+
+      sp.selectRange(0, 29);
+
+      selection = sp.getSelectionRange();
+
+      is(selection.start, 0, "selection.start is 0");
+      is(selection.end, 29, "selection.end is 29");
+    },
+    then: function([code, , result]) {
+      is(code, "window.foobarBug636725 = 'a';", "code is correct");
+      is(result, "a", "result is correct");
+
+      is(sp.getText(), "window.foobarBug636725 = 'a';\n" +
+                       "window.foobarBug636725 = 'b';",
+         "run() does not change the textbox value");
+
+      is(content.wrappedJSObject.foobarBug636725, "a",
+         "run() worked for the selected range");
+    }
+  },
+  {
+    method: "display",
+    prepare: function() {
+      sp.setText("window.foobarBug636725 = 'c';\n" +
+                 "window.foobarBug636725 = 'b';");
+
+      sp.selectRange(0, 22);
+    },
+    then: function() {
+      is(content.wrappedJSObject.foobarBug636725, "a",
+         "display() worked for the selected range");
+
+      is(sp.getText(), "window.foobarBug636725" +
+                       "\n/*\na\n*/" +
+                       " = 'c';\n" +
+                       "window.foobarBug636725 = 'b';",
+         "display() shows evaluation result in the textbox");
+
+      is(sp.selectedText, "\n/*\na\n*/", "selectedText is correct");
+    }
+  }]
+
+
+  runAsyncCallbackTests(sp, tests).then(function() {
+    let selection = sp.getSelectionRange();
+    is(selection.start, 22, "selection.start is correct");
+    is(selection.end, 30, "selection.end is correct");
+
+    sp.deselect();
+
+    ok(!sp.selectedText, "selectedText is empty");
+
+    selection = sp.getSelectionRange();
+    is(selection.start, selection.end, "deselect() works");
+
+    // Test undo/redo.
+
+    sp.setText("foo1");
+    sp.setText("foo2");
+    is(sp.getText(), "foo2", "editor content updated");
+    sp.undo();
+    is(sp.getText(), "foo1", "undo() works");
+    sp.redo();
+    is(sp.getText(), "foo2", "redo() works");
+
+    finish();
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_files.js b/browser/devtools/scratchpad/test/browser_scratchpad_files.js
new file mode 100644
index 000000000..e31af7946
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_files.js
@@ -0,0 +1,118 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tempScope = {};
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+let NetUtil = tempScope.NetUtil;
+
+// Reference to the Scratchpad object.
+let gScratchpad;
+
+// Reference to the temporary nsIFile we will work with.
+let gFile;
+
+// The temporary file content.
+let gFileContent = "hello.world('bug636725');";
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test file open and save in Scratchpad";
+}
+
+function runTests()
+{
+  gScratchpad = gScratchpadWindow.Scratchpad;
+
+  createTempFile("fileForBug636725.tmp", gFileContent, function(aStatus, aFile) {
+    ok(Components.isSuccessCode(aStatus),
+      "The temporary file was saved successfully");
+
+      gFile = aFile;
+      gScratchpad.importFromFile(gFile.QueryInterface(Ci.nsILocalFile), true,
+        fileImported);
+  });
+}
+
+function fileImported(aStatus, aFileContent)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was imported successfully with Scratchpad");
+
+  is(aFileContent, gFileContent,
+     "received data is correct");
+
+  is(gScratchpad.getText(), gFileContent,
+     "the editor content is correct");
+
+  // Save the file after changes.
+  gFileContent += "// omg, saved!";
+  gScratchpad.setText(gFileContent);
+
+  gScratchpad.exportToFile(gFile.QueryInterface(Ci.nsILocalFile), true, true,
+                          fileExported);
+}
+
+function fileExported(aStatus)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was exported successfully with Scratchpad");
+
+  let oldContent = gFileContent;
+
+  // Attempt another file save, with confirmation which returns false.
+  gFileContent += "// omg, saved twice!";
+  gScratchpad.setText(gFileContent);
+
+  let oldConfirm = gScratchpadWindow.confirm;
+  let askedConfirmation = false;
+  gScratchpadWindow.confirm = function() {
+    askedConfirmation = true;
+    return false;
+  };
+
+  gScratchpad.exportToFile(gFile.QueryInterface(Ci.nsILocalFile), false, true,
+                          fileExported2);
+
+  gScratchpadWindow.confirm = oldConfirm;
+
+  ok(askedConfirmation, "exportToFile() asked for overwrite confirmation");
+
+  gFileContent = oldContent;
+
+  let channel = NetUtil.newChannel(gFile);
+  channel.contentType = "application/javascript";
+
+  // Read back the temporary file.
+  NetUtil.asyncFetch(channel, fileRead);
+}
+
+function fileExported2()
+{
+  ok(false, "exportToFile() did not cancel file overwrite");
+}
+
+function fileRead(aInputStream, aStatus)
+{
+  ok(Components.isSuccessCode(aStatus),
+     "the temporary file was read back successfully");
+
+  let updatedContent =
+    NetUtil.readInputStreamToString(aInputStream, aInputStream.available());;
+
+  is(updatedContent, gFileContent, "file properly updated");
+
+  // Done!
+  gFile.remove(false);
+  gFile = null;
+  gScratchpad = null;
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_initialization.js b/browser/devtools/scratchpad/test/browser_scratchpad_initialization.js
new file mode 100644
index 000000000..67bca826a
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_initialization.js
@@ -0,0 +1,48 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+
+    ok(window.Scratchpad, "Scratchpad variable exists");
+
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,initialization test for Scratchpad";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  ok(sp, "Scratchpad object exists in new window");
+  is(typeof sp.run, "function", "Scratchpad.run() exists");
+  is(typeof sp.inspect, "function", "Scratchpad.inspect() exists");
+  is(typeof sp.display, "function", "Scratchpad.display() exists");
+
+  let environmentMenu = gScratchpadWindow.document.
+                          getElementById("sp-environment-menu");
+  ok(environmentMenu, "Environment menu element exists");
+  ok(environmentMenu.hasAttribute("hidden"),
+     "Environment menu is not visible");
+
+  let errorConsoleCommand = gScratchpadWindow.document.
+                            getElementById("sp-cmd-errorConsole");
+  ok(errorConsoleCommand, "Error console command element exists");
+  is(errorConsoleCommand.getAttribute("disabled"), "true",
+     "Error console command is disabled");
+
+  let chromeContextCommand = gScratchpadWindow.document.
+                            getElementById("sp-cmd-browserContext");
+  ok(chromeContextCommand, "Chrome context command element exists");
+  is(chromeContextCommand.getAttribute("disabled"), "true",
+     "Chrome context command is disabled");
+
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_inspect.js b/browser/devtools/scratchpad/test/browser_scratchpad_inspect.js
new file mode 100644
index 000000000..b4e81a991
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_inspect.js
@@ -0,0 +1,55 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html;charset=utf8,<p>test inspect() in Scratchpad</p>";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+
+  sp.setText("({ a: 'foobarBug636725' })");
+
+  sp.inspect().then(function() {
+    let sidebar = sp.sidebar;
+    ok(sidebar.visible, "sidebar is open");
+
+
+    let found = false;
+
+    outer: for (let scope in sidebar.variablesView) {
+      for (let [, obj] in scope) {
+        for (let [, prop] in obj) {
+          if (prop.name == "a" && prop.value == "foobarBug636725") {
+            found = true;
+            break outer;
+          }
+        }
+      }
+    }
+
+    ok(found, "found the property");
+
+    let tabbox = sidebar._sidebar._tabbox;
+    is(tabbox.width, 300, "Scratchpad sidebar width is correct");
+    ok(!tabbox.hasAttribute("hidden"), "Scratchpad sidebar visible");
+    sidebar.hide();
+    ok(tabbox.hasAttribute("hidden"), "Scratchpad sidebar hidden");
+    sp.inspect().then(function() {
+      is(tabbox.width, 300, "Scratchpad sidebar width is still correct");
+      ok(!tabbox.hasAttribute("hidden"), "Scratchpad sidebar visible again");
+      finish();
+    });
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_open.js b/browser/devtools/scratchpad/test/browser_scratchpad_open.js
new file mode 100644
index 000000000..462d9ad2d
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_open.js
@@ -0,0 +1,76 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// only finish() when correct number of tests are done
+const expected = 3;
+var count = 0;
+var lastUniqueName = null;
+
+function done()
+{
+  if (++count == expected) {
+    finish();
+  }
+}
+
+function test()
+{
+  waitForExplicitFinish();
+  testOpen();
+  testOpenWithState();
+  testOpenInvalidState();
+}
+
+function testUniqueName(name)
+{
+  ok(name, "Scratchpad has a uniqueName");
+
+  if (lastUniqueName === null) {
+    lastUniqueName = name;
+    return;
+  }
+
+  ok(name !== lastUniqueName,
+      "Unique name for this instance differs from the last one.");
+}
+
+function testOpen()
+{
+  openScratchpad(function(win) {
+    is(win.Scratchpad.filename, undefined, "Default filename is undefined");
+    isnot(win.Scratchpad.getText(), null, "Default text should not be null");
+    is(win.Scratchpad.executionContext, win.SCRATCHPAD_CONTEXT_CONTENT,
+      "Default execution context is content");
+    testUniqueName(win.Scratchpad.uniqueName);
+
+    win.close();
+    done();
+  }, {noFocus: true});
+}
+
+function testOpenWithState()
+{
+  let state = {
+    filename: "testfile",
+    executionContext: 2,
+    text: "test text"
+  };
+
+  openScratchpad(function(win) {
+    is(win.Scratchpad.filename, state.filename, "Filename loaded from state");
+    is(win.Scratchpad.executionContext, state.executionContext, "Execution context loaded from state");
+    is(win.Scratchpad.getText(), state.text, "Content loaded from state");
+    testUniqueName(win.Scratchpad.uniqueName);
+
+    win.close();
+    done();
+  }, {state: state, noFocus: true});
+}
+
+function testOpenInvalidState()
+{
+  let win = openScratchpad(null, {state: 7});
+  ok(!win, "no scratchpad opened if state is not an object");
+  done();
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_restore.js b/browser/devtools/scratchpad/test/browser_scratchpad_restore.js
new file mode 100644
index 000000000..a83c4213c
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_restore.js
@@ -0,0 +1,98 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+var ScratchpadManager = Scratchpad.ScratchpadManager;
+
+/* Call the iterator for each item in the list,
+   calling the final callback with all the results
+   after every iterator call has sent its result */
+function asyncMap(items, iterator, callback)
+{
+  let expected = items.length;
+  let results = [];
+
+  items.forEach(function(item) {
+    iterator(item, function(result) {
+      results.push(result);
+      if (results.length == expected) {
+        callback(results);
+      }
+    });
+  });
+}
+
+function test()
+{
+  waitForExplicitFinish();
+  testRestore();
+}
+
+function testRestore()
+{
+  let states = [
+    {
+      filename: "testfile",
+      text: "test1",
+      executionContext: 2
+    },
+    {
+      text: "text2",
+      executionContext: 1
+    },
+    {
+      text: "text3",
+      executionContext: 1
+    }
+  ];
+
+  asyncMap(states, function(state, done) {
+    // Open some scratchpad windows
+    openScratchpad(done, {state: state, noFocus: true});
+  }, function(wins) {
+    // Then save the windows to session store
+    ScratchpadManager.saveOpenWindows();
+
+    // Then get their states
+    let session = ScratchpadManager.getSessionState();
+
+    // Then close them
+    wins.forEach(function(win) {
+      win.close();
+    });
+
+    // Clear out session state for next tests
+    ScratchpadManager.saveOpenWindows();
+
+    // Then restore them
+    let restoredWins = ScratchpadManager.restoreSession(session);
+
+    is(restoredWins.length, 3, "Three scratchad windows restored");
+
+    asyncMap(restoredWins, function(restoredWin, done) {
+      openScratchpad(function(aWin) {
+        let state = aWin.Scratchpad.getState();
+        aWin.close();
+        done(state);
+      }, {window: restoredWin, noFocus: true});
+    }, function(restoredStates) {
+      // Then make sure they were restored with the right states
+      ok(statesMatch(restoredStates, states),
+        "All scratchpad window states restored correctly");
+
+      // Yay, we're done!
+      finish();
+    });
+  });
+}
+
+function statesMatch(restoredStates, states)
+{
+  return states.every(function(state) {
+    return restoredStates.some(function(restoredState) {
+      return state.filename == restoredState.filename
+        && state.text == restoredState.text
+        && state.executionContext == restoredState.executionContext;
+    })
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_tab_switch.js b/browser/devtools/scratchpad/test/browser_scratchpad_tab_switch.js
new file mode 100644
index 000000000..68314b930
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_tab_switch.js
@@ -0,0 +1,103 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let tab1;
+let tab2;
+let sp;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  tab1 = gBrowser.addTab();
+  gBrowser.selectedTab = tab1;
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad1() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad1, true);
+
+    tab2 = gBrowser.addTab();
+    gBrowser.selectedTab = tab2;
+    gBrowser.selectedBrowser.addEventListener("load", function onLoad2() {
+      gBrowser.selectedBrowser.removeEventListener("load", onLoad2, true);
+      openScratchpad(runTests);
+    }, true);
+    content.location = "data:text/html,test context switch in Scratchpad tab 2";
+  }, true);
+
+  content.location = "data:text/html,test context switch in Scratchpad tab 1";
+}
+
+function runTests()
+{
+  sp = gScratchpadWindow.Scratchpad;
+
+  let contentMenu = gScratchpadWindow.document.getElementById("sp-menu-content");
+  let browserMenu = gScratchpadWindow.document.getElementById("sp-menu-browser");
+  let notificationBox = sp.notificationBox;
+
+  ok(contentMenu, "found #sp-menu-content");
+  ok(browserMenu, "found #sp-menu-browser");
+  ok(notificationBox, "found Scratchpad.notificationBox");
+
+  sp.setContentContext();
+
+  is(sp.executionContext, gScratchpadWindow.SCRATCHPAD_CONTEXT_CONTENT,
+     "executionContext is content");
+
+  is(contentMenu.getAttribute("checked"), "true",
+     "content menuitem is checked");
+
+  isnot(browserMenu.getAttribute("checked"), "true",
+     "chrome menuitem is not checked");
+
+  is(notificationBox.currentNotification, null,
+     "there is no notification currently shown for content context");
+
+  sp.setText("window.foosbug653108 = 'aloha';");
+
+  ok(!content.wrappedJSObject.foosbug653108,
+     "no content.foosbug653108");
+
+  sp.run().then(function() {
+    is(content.wrappedJSObject.foosbug653108, "aloha",
+       "content.foosbug653108 has been set");
+
+    gBrowser.tabContainer.addEventListener("TabSelect", runTests2, true);
+    gBrowser.selectedTab = tab1;
+  });
+}
+
+function runTests2() {
+  gBrowser.tabContainer.removeEventListener("TabSelect", runTests2, true);
+
+  ok(!window.foosbug653108, "no window.foosbug653108");
+
+  sp.setText("window.foosbug653108");
+  sp.run().then(function([, , result]) {
+    isnot(result, "aloha", "window.foosbug653108 is not aloha");
+
+    sp.setText("window.foosbug653108 = 'ahoyhoy';");
+    sp.run().then(function() {
+      is(content.wrappedJSObject.foosbug653108, "ahoyhoy",
+         "content.foosbug653108 has been set 2");
+
+      gBrowser.selectedBrowser.addEventListener("load", runTests3, true);
+      content.location = "data:text/html,test context switch in Scratchpad location 2";
+    });
+  });
+}
+
+function runTests3() {
+  gBrowser.selectedBrowser.removeEventListener("load", runTests3, true);
+  // Check that the sandbox is not cached.
+
+  sp.setText("typeof foosbug653108;");
+  sp.run().then(function([, , result]) {
+    is(result, "undefined", "global variable does not exist");
+
+    tab1 = null;
+    tab2 = null;
+    sp = null;
+    finish();
+  });
+}
diff --git a/browser/devtools/scratchpad/test/browser_scratchpad_ui.js b/browser/devtools/scratchpad/test/browser_scratchpad_ui.js
new file mode 100644
index 000000000..a41aea149
--- /dev/null
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_ui.js
@@ -0,0 +1,70 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<title>foobarBug636725</title>" +
+    "<p>test inspect() in Scratchpad";
+}
+
+function runTests()
+{
+  let sp = gScratchpadWindow.Scratchpad;
+  let doc = gScratchpadWindow.document;
+
+  let methodsAndItems = {
+    "sp-menu-newscratchpad": "openScratchpad",
+    "sp-menu-open": "openFile",
+    "sp-menu-save": "saveFile",
+    "sp-menu-saveas": "saveFileAs",
+    "sp-text-run": "run",
+    "sp-text-inspect": "inspect",
+    "sp-text-display": "display",
+    "sp-text-resetContext": "resetContext",
+    "sp-menu-content": "setContentContext",
+    "sp-menu-browser": "setBrowserContext",
+  };
+
+  let lastMethodCalled = null;
+  sp.__noSuchMethod__ = function(aMethodName) {
+    lastMethodCalled = aMethodName;
+  };
+
+  for (let id in methodsAndItems) {
+    lastMethodCalled = null;
+
+    let methodName = methodsAndItems[id];
+    let oldMethod = sp[methodName];
+    ok(oldMethod, "found method " + methodName + " in Scratchpad object");
+
+    delete sp[methodName];
+
+    let menu = doc.getElementById(id);
+    ok(menu, "found menuitem #" + id);
+
+    try {
+      menu.doCommand();
+    }
+    catch (ex) {
+      ok(false, "exception thrown while executing the command of menuitem #" + id);
+    }
+
+    ok(lastMethodCalled == methodName,
+       "method " + methodName + " invoked by the associated menuitem");
+
+    sp[methodName] = oldMethod;
+  }
+
+  delete sp.__noSuchMethod__;
+
+  finish();
+}
diff --git a/browser/devtools/scratchpad/test/head.js b/browser/devtools/scratchpad/test/head.js
new file mode 100644
index 000000000..07dfd0239
--- /dev/null
+++ b/browser/devtools/scratchpad/test/head.js
@@ -0,0 +1,197 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let tempScope = {};
+
+Cu.import("resource://gre/modules/NetUtil.jsm", tempScope);
+Cu.import("resource://gre/modules/FileUtils.jsm", tempScope);
+Cu.import("resource://gre/modules/commonjs/sdk/core/promise.js", tempScope);
+
+
+let NetUtil = tempScope.NetUtil;
+let FileUtils = tempScope.FileUtils;
+let Promise = tempScope.Promise;
+
+let gScratchpadWindow; // Reference to the Scratchpad chrome window object
+
+/**
+ * Open a Scratchpad window.
+ *
+ * @param function aReadyCallback
+ *        Optional. The function you want invoked when the Scratchpad instance
+ *        is ready.
+ * @param object aOptions
+ *        Optional. Options for opening the scratchpad:
+ *        - window
+ *          Provide this if there's already a Scratchpad window you want to wait
+ *          loading for.
+ *        - state
+ *          Scratchpad state object. This is used when Scratchpad is open.
+ *        - noFocus
+ *          Boolean that tells you do not want the opened window to receive
+ *          focus.
+ * @return nsIDOMWindow
+ *         The new window object that holds Scratchpad. Note that the
+ *         gScratchpadWindow global is also updated to reference the new window
+ *         object.
+ */
+function openScratchpad(aReadyCallback, aOptions)
+{
+  aOptions = aOptions || {};
+
+  let win = aOptions.window ||
+            Scratchpad.ScratchpadManager.openScratchpad(aOptions.state);
+  if (!win) {
+    return;
+  }
+
+  let onLoad = function() {
+    win.removeEventListener("load", onLoad, false);
+
+    win.Scratchpad.addObserver({
+      onReady: function(aScratchpad) {
+        aScratchpad.removeObserver(this);
+
+        if (aOptions.noFocus) {
+          aReadyCallback(win, aScratchpad);
+        } else {
+          waitForFocus(aReadyCallback.bind(null, win, aScratchpad), win);
+        }
+      }
+    });
+  };
+
+  if (aReadyCallback) {
+    win.addEventListener("load", onLoad, false);
+  }
+
+  gScratchpadWindow = win;
+  return gScratchpadWindow;
+}
+
+/**
+ * Create a temporary file, write to it and call a callback
+ * when done.
+ *
+ * @param string aName
+ *        Name of your temporary file.
+ * @param string aContent
+ *        Temporary file's contents.
+ * @param function aCallback
+ *        Optional callback to be called when we're done writing
+ *        to the file. It will receive two parameters: status code
+ *        and a file object.
+ */
+function createTempFile(aName, aContent, aCallback=function(){})
+{
+  // Create a temporary file.
+  let file = FileUtils.getFile("TmpD", [aName]);
+  file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, parseInt("666", 8));
+
+  // Write the temporary file.
+  let fout = Cc["@mozilla.org/network/file-output-stream;1"].
+             createInstance(Ci.nsIFileOutputStream);
+  fout.init(file.QueryInterface(Ci.nsILocalFile), 0x02 | 0x08 | 0x20,
+            parseInt("644", 8), fout.DEFER_OPEN);
+
+  let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
+                  createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = "UTF-8";
+  let fileContentStream = converter.convertToInputStream(aContent);
+
+  NetUtil.asyncCopy(fileContentStream, fout, function (aStatus) {
+    aCallback(aStatus, file);
+  });
+}
+
+/**
+ * Run a set of asychronous tests sequentially defined by input and output.
+ *
+ * @param Scratchpad aScratchpad
+ *        The scratchpad to use in running the tests.
+ * @param array aTests
+ *        An array of test objects, each with the following properties:
+ *        - method
+ *          Scratchpad method to use, one of "run", "display", or "inspect".
+ *        - code
+ *          Code to run in the scratchpad.
+ *        - result
+ *          Expected code that will be in the scratchpad upon completion.
+ *        - label
+ *          The tests label which will be logged in the test runner output.
+ * @return Promise
+ *         The promise that will be resolved when all tests are finished.
+ */
+function runAsyncTests(aScratchpad, aTests)
+{
+  let deferred = Promise.defer();
+
+  (function runTest() {
+    if (aTests.length) {
+      let test = aTests.shift();
+      aScratchpad.setText(test.code);
+      aScratchpad[test.method]().then(function success() {
+        is(aScratchpad.getText(), test.result, test.label);
+        runTest();
+      }, function failure(error) {
+        ok(false, error.stack + " " + test.label);
+        runTest();
+      });
+    } else {
+      deferred.resolve();
+    }
+  })();
+
+  return deferred.promise;
+}
+
+/**
+ * Run a set of asychronous tests sequentially with callbacks to prepare each
+ * test and to be called when the test result is ready.
+ *
+ * @param Scratchpad aScratchpad
+ *        The scratchpad to use in running the tests.
+ * @param array aTests
+ *        An array of test objects, each with the following properties:
+ *        - method
+ *          Scratchpad method to use, one of "run", "display", or "inspect".
+ *        - prepare
+ *          The callback to run just prior to executing the scratchpad method.
+ *        - then
+ *          The callback to run when the scratchpad execution promise resolves.
+ * @return Promise
+ *         The promise that will be resolved when all tests are finished.
+ */
+function runAsyncCallbackTests(aScratchpad, aTests)
+{
+  let deferred = Promise.defer();
+
+  (function runTest() {
+    if (aTests.length) {
+      let test = aTests.shift();
+      test.prepare();
+      aScratchpad[test.method]().then(test.then.bind(test)).then(runTest);
+    } else {
+      deferred.resolve();
+    }
+  })();
+
+  return deferred.promise;
+}
+
+
+function cleanup()
+{
+  if (gScratchpadWindow) {
+    gScratchpadWindow.close();
+    gScratchpadWindow = null;
+  }
+  while (gBrowser.tabs.length > 1) {
+    gBrowser.removeCurrentTab();
+  }
+}
+
+registerCleanupFunction(cleanup);
diff --git a/browser/devtools/scratchpad/test/moz.build b/browser/devtools/scratchpad/test/moz.build
new file mode 100644
index 000000000..895d11993
--- /dev/null
+++ b/browser/devtools/scratchpad/test/moz.build
@@ -0,0 +1,6 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+