Lay down Pale Moon 30

1 files changed, 889 insertions, 0 deletions

diff --git a/browser/base/content/utilityOverlay.js b/browser/base/content/utilityOverlay.js
new file mode 100644
index 000000000..28fc4f838
--- /dev/null
+++ b/browser/base/content/utilityOverlay.js
@@ -0,0 +1,889 @@
+# -*- Mode: javascript; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// Services = object with smart getters for common XPCOM services
+Components.utils.import("resource://gre/modules/Services.jsm");
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/PrivateBrowsingUtils.jsm");
+Components.utils.import("resource:///modules/RecentWindow.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "ShellService",
+                                  "resource:///modules/ShellService.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Deprecated",
+                                  "resource://gre/modules/Deprecated.jsm");
+
+XPCOMUtils.defineLazyGetter(this, "BROWSER_NEW_TAB_URL", function() {
+  const PREF = "browser.newtab.url";
+
+  function getNewTabPageURL() {
+    if (!Services.prefs.prefHasUserValue(PREF)) {
+      if (PrivateBrowsingUtils.isWindowPrivate(window) &&
+          !PrivateBrowsingUtils.permanentPrivateBrowsing) {
+        return "about:privatebrowsing";
+      }
+    }
+    return Services.prefs.getCharPref(PREF) || "about:blank";
+  }
+
+  function update() {
+    BROWSER_NEW_TAB_URL = getNewTabPageURL();
+  }
+
+  Services.prefs.addObserver(PREF, update, false);
+
+  addEventListener("unload", function onUnload() {
+    removeEventListener("unload", onUnload);
+    Services.prefs.removeObserver(PREF, update);
+  });
+
+  return getNewTabPageURL();
+});
+
+var TAB_DROP_TYPE = "application/x-moz-tabbrowser-tab";
+
+var gBidiUI = false;
+
+/**
+ * Determines whether the given url is considered a special URL for new tabs.
+ */
+function isBlankPageURL(aURL) {
+  // Only make "about:blank", the logopage, or "about:newtab" be 
+  // a "blank page" to fix focus issues. 
+  // Original code: return aURL == "about:blank" || aURL == BROWSER_NEW_TAB_URL;
+  return aURL == "about:blank" || aURL == "about:newtab" || aURL == "about:logopage";
+}
+
+function getBrowserURL() {
+  return "chrome://browser/content/browser.xul";
+}
+
+function getBoolPref(pref, defaultValue) {
+  Deprecated.warning("getBoolPref is deprecated and will be removed in a future release. " +
+                     "You should use Services.pref.getBoolPref (Services.jsm).",
+                     "https://github.com/MoonchildProductions/UXP/issues/989");
+  return Services.prefs.getBoolPref(pref, defaultValue);
+}
+
+
+function getTopWin(skipPopups) {
+  // If this is called in a browser window, use that window regardless of
+  // whether it's the frontmost window, since commands can be executed in
+  // background windows (bug 626148).
+  if (top.document.documentElement.getAttribute("windowtype") == "navigator:browser" &&
+      (!skipPopups || top.toolbar.visible)) {
+    return top;
+  }
+
+  let isPrivate = PrivateBrowsingUtils.isWindowPrivate(window);
+  return RecentWindow.getMostRecentBrowserWindow({ private: isPrivate,
+                                                   allowPopups: !skipPopups });
+}
+
+function openTopWin(url) {
+  /* deprecated */
+  openUILinkIn(url, "current");
+}
+
+/* openUILink handles clicks on UI elements that cause URLs to load.
+ *
+ * As the third argument, you may pass an object with the same properties as
+ * accepted by openUILinkIn, plus "ignoreButton" and "ignoreAlt".
+ */
+function openUILink(url, event, aIgnoreButton, aIgnoreAlt, aAllowThirdPartyFixup,
+                    aPostData, aReferrerURI) {
+  let params;
+
+  if (aIgnoreButton && typeof aIgnoreButton == "object") {
+    params = aIgnoreButton;
+
+    // don't forward "ignoreButton" and "ignoreAlt" to openUILinkIn
+    aIgnoreButton = params.ignoreButton;
+    aIgnoreAlt = params.ignoreAlt;
+    delete params.ignoreButton;
+    delete params.ignoreAlt;
+  } else {
+    params = {
+      allowThirdPartyFixup: aAllowThirdPartyFixup,
+      postData: aPostData,
+      referrerURI: aReferrerURI,
+      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+      initiatingDoc: event ? event.target.ownerDocument : null,
+    };
+  }
+
+  let where = whereToOpenLink(event, aIgnoreButton, aIgnoreAlt);
+  openUILinkIn(url, where, params);
+}
+
+
+/* whereToOpenLink() looks at an event to decide where to open a link.
+ *
+ * The event may be a mouse event (click, double-click, middle-click) or keypress event (enter).
+ *
+ * On Windows, the modifiers are:
+ * Ctrl        new tab, selected
+ * Shift       new window
+ * Ctrl+Shift  new tab, in background
+ * Alt         save
+ *
+ * Middle-clicking is the same as Ctrl+clicking (it opens a new tab).
+ *
+ * Exceptions: 
+ * - Alt is ignored for menu items selected using the keyboard so you don't accidentally save stuff.  
+ *    (Currently, the Alt isn't sent here at all for menu items, but that will change in bug 126189.)
+ * - Alt is hard to use in context menus, because pressing Alt closes the menu.
+ * - Alt can't be used on the bookmarks toolbar because Alt is used for "treat this as something draggable".
+ * - The button is ignored for the middle-click-paste-URL feature, since it's always a middle-click.
+ */
+function whereToOpenLink(e, ignoreButton, ignoreAlt) {
+  // This method must treat a null event like a left click without modifier keys (i.e.
+  // e = { shiftKey:false, ctrlKey:false, metaKey:false, altKey:false, button:0 })
+  // for compatibility purposes.
+  if (!e) {
+    return "current";
+  }
+
+  var shift = e.shiftKey;
+  var ctrl =  e.ctrlKey;
+  var meta =  e.metaKey;
+  var alt  =  e.altKey && !ignoreAlt;
+
+  // ignoreButton allows "middle-click paste" to use function without always opening in a new window.
+  var middle = !ignoreButton && e.button == 1;
+  var middleUsesTabs = Services.prefs.getBoolPref("browser.tabs.opentabfor.middleclick", true);
+
+  // Don't do anything special with right-mouse clicks.  They're probably clicks on context menu items.
+
+  if (ctrl || (middle && middleUsesTabs)) {
+    return shift ? "tabshifted" : "tab";
+  }
+
+  if (alt && Services.prefs.getBoolPref("browser.altClickSave", false)) {
+    return "save";
+  }
+
+  if (shift || (middle && !middleUsesTabs)) {
+    return "window";
+  }
+
+  return "current";
+}
+
+/* openUILinkIn opens a URL in a place specified by the parameter |where|.
+ *
+ * |where| can be:
+ *  "current"     current tab            (if there aren't any browser windows, then in a new window instead)
+ *  "tab"         new tab                (if there aren't any browser windows, then in a new window instead)
+ *  "tabshifted"  same as "tab" but in background if default is to select new tabs, and vice versa
+ *  "window"      new window
+ *  "save"        save to disk (with no filename hint!)
+ *
+ * aAllowThirdPartyFixup controls whether third party services such as Google's
+ * I Feel Lucky are allowed to interpret this URL. This parameter may be
+ * undefined, which is treated as false.
+ *
+ * Instead of aAllowThirdPartyFixup, you may also pass an object with any of
+ * these properties:
+ *   allowThirdPartyFixup (boolean)
+ *   postData             (nsIInputStream)
+ *   referrerURI          (nsIURI)
+ *   relatedToCurrent     (boolean)
+ */
+function openUILinkIn(url, where, aAllowThirdPartyFixup, aPostData, aReferrerURI) {
+  var params;
+
+  if (arguments.length == 3 && typeof arguments[2] == "object") {
+    params = aAllowThirdPartyFixup;
+  } else {
+    params = {
+      allowThirdPartyFixup: aAllowThirdPartyFixup,
+      postData: aPostData,
+      referrerURI: aReferrerURI,
+      referrerPolicy: Components.interfaces.nsIHttpChannel.REFERRER_POLICY_DEFAULT,
+    };
+  }
+
+  params.fromChrome = true;
+
+  openLinkIn(url, where, params);
+}
+
+/* eslint-disable complexity */
+function openLinkIn(url, where, params) {
+  if (!where || !url) {
+    return;
+  }
+  const Cc = Components.classes;
+  const Ci = Components.interfaces;
+
+  var aFromChrome           = params.fromChrome;
+  var aAllowThirdPartyFixup = params.allowThirdPartyFixup;
+  var aPostData             = params.postData;
+  var aCharset              = params.charset;
+  var aReferrerURI          = params.referrerURI;
+  var aReferrerPolicy       = ('referrerPolicy' in params ?
+                               params.referrerPolicy :
+                               Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+  var aRelatedToCurrent     = params.relatedToCurrent;
+  var aForceAllowDataURI    = params.forceAllowDataURI;
+  var aInBackground         = params.inBackground;
+  var aDisallowInheritPrincipal = params.disallowInheritPrincipal;
+  var aInitiatingDoc        = params.initiatingDoc;
+  var aIsPrivate            = params.private;
+  var aPrincipal            = params.originPrincipal;
+  var aTriggeringPrincipal  = params.triggeringPrincipal;
+  var aForceAboutBlankViewerInCurrent = params.forceAboutBlankViewerInCurrent;
+  var sendReferrerURI       = true;
+
+  if (where == "save") {
+    if (!aInitiatingDoc) {
+      Components.utils.reportError("openUILink/openLinkIn was called with " +
+        "where == 'save' but without initiatingDoc.  See bug 814264.");
+      return;
+    }
+    // TODO(1073187): propagate referrerPolicy.
+    saveURL(url, null, null, true, null, aReferrerURI, aInitiatingDoc);
+    return;
+  }
+
+  var w = getTopWin();
+  if ((where == "tab" || where == "tabshifted") &&
+      w && !w.toolbar.visible) {
+    w = getTopWin(true);
+    aRelatedToCurrent = false;
+  }
+
+  // We can only do this after we're sure of what |w| will be the rest of this function.
+  // Note that if |w| is null we might have no current browser (we'll open a new window).
+  var aCurrentBrowser = params.currentBrowser || (w && w.gBrowser.selectedBrowser);
+  
+  // Teach the principal about the right OA to use, e.g. in case when
+  // opening a link in a new private window.
+  // Please note we do not have to do that for SystemPrincipals and we
+  // can not do it for NullPrincipals since NullPrincipals are only
+  // identical if they actually are the same object (See Bug: 1346759)
+  function useOAForPrincipal(principal) {
+    if (principal && principal.isCodebasePrincipal) {
+      let attrs = {
+        privateBrowsingId: aIsPrivate || (w && PrivateBrowsingUtils.isWindowPrivate(w)),
+      };
+      return Services.scriptSecurityManager.createCodebasePrincipal(principal.URI, attrs);
+    }
+    return principal;
+  }
+  aPrincipal = useOAForPrincipal(aPrincipal);
+  aTriggeringPrincipal = useOAForPrincipal(aTriggeringPrincipal);
+
+  if (!w || where == "window") {
+    // This propagates to window.arguments.
+    // Strip referrer data when opening a new private window, to prevent
+    // regular browsing data from leaking into it.
+    if (aIsPrivate) {
+      sendReferrerURI = false;
+    }
+    
+    var sa = Cc["@mozilla.org/supports-array;1"].createInstance(Ci.nsISupportsArray);
+
+    var wuri = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
+    wuri.data = url;
+
+    let charset = null;
+    if (aCharset) {
+      charset = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
+      charset.data = "charset=" + aCharset;
+    }
+
+    var allowThirdPartyFixupSupports = Cc["@mozilla.org/supports-PRBool;1"]
+                                         .createInstance(Ci.nsISupportsPRBool);
+    allowThirdPartyFixupSupports.data = aAllowThirdPartyFixup;
+
+    var referrerURISupports = null;
+    if (aReferrerURI && sendReferrerURI) {
+      referrerURISupports = Cc["@mozilla.org/supports-string;1"]
+                              .createInstance(Ci.nsISupportsString);
+      referrerURISupports.data = aReferrerURI.spec;
+    }
+
+    var referrerPolicySupports = Cc["@mozilla.org/supports-PRUint32;1"]
+                                   .createInstance(Ci.nsISupportsPRUint32);
+    referrerPolicySupports.data = aReferrerPolicy;
+
+    sa.AppendElement(wuri);
+    sa.AppendElement(charset);
+    sa.AppendElement(referrerURISupports);
+    sa.AppendElement(aPostData);
+    sa.AppendElement(allowThirdPartyFixupSupports);
+    sa.AppendElement(referrerPolicySupports);
+    sa.AppendElement(aPrincipal);
+    sa.AppendElement(aTriggeringPrincipal);
+
+    let features = "chrome,dialog=no,all";
+    if (aIsPrivate) {
+      features += ",private";
+    }
+
+    Services.ww.openWindow(w || window, getBrowserURL(), null, features, sa);
+    return;
+  }
+
+  let loadInBackground = where == "current" ? false : aInBackground;
+  if (loadInBackground == null) {
+    loadInBackground = aFromChrome ?
+                       false :
+                       Services.prefs.getBoolPref("browser.tabs.loadInBackground");
+  }
+
+  let uriObj;
+  if (where == "current") {
+    try {
+      uriObj = Services.io.newURI(url, null, null);
+    } catch(e) {}
+  }
+
+  if (where == "current" && w.gBrowser.selectedTab.pinned) {
+    try {
+      // nsIURI.host can throw for non-nsStandardURL nsIURIs.
+      if (!uriObj || !uriObj.schemeIs("javascript") &&
+          w.gBrowser.currentURI.host != uriObj.host) {
+        where = "tab";
+        loadInBackground = false;
+      }
+    } catch(err) {
+      where = "tab";
+      loadInBackground = false;
+    }
+  }
+
+  // Raise the target window before loading the URI, since loading it may
+  // result in a new frontmost window (e.g. "javascript:window.open('');").
+  w.focus();
+
+  let browserUsedForLoad = null;
+  switch (where) {
+    case "current":
+      let flags = Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
+      if (aAllowThirdPartyFixup) {
+        flags |= Ci.nsIWebNavigation.LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP;
+        flags |= Ci.nsIWebNavigation.LOAD_FLAGS_FIXUP_SCHEME_TYPOS;
+      }
+      if (aDisallowInheritPrincipal) {
+        flags |= Ci.nsIWebNavigation.LOAD_FLAGS_DISALLOW_INHERIT_PRINCIPAL;
+      }
+      if (aForceAllowDataURI) {
+        flags |= Ci.nsIWebNavigation.LOAD_FLAGS_FORCE_ALLOW_DATA_URI;
+      }
+      let {URI_INHERITS_SECURITY_CONTEXT} = Ci.nsIProtocolHandler;
+      if (aForceAboutBlankViewerInCurrent &&
+          (!uriObj ||
+           (Services.io.getProtocolFlags(uriObj.scheme) & URI_INHERITS_SECURITY_CONTEXT))) {
+        // Unless we know for sure we're not inheriting principals,
+        // force the about:blank viewer to have the right principal:
+        w.gBrowser.selectedBrowser.createAboutBlankContentViewer(aPrincipal);
+      }
+
+      w.gBrowser.loadURIWithFlags(url, { flags: flags,
+                                         triggeringPrincipal: aTriggeringPrincipal,
+                                         referrerURI: aReferrerURI,
+                                         referrerPolicy: aReferrerPolicy,
+                                         postData: aPostData,
+                                         originPrincipal: aPrincipal }); 
+      browserUsedForLoad = aCurrentBrowser;
+      break;
+    case "tabshifted":
+      loadInBackground = !loadInBackground;
+      // fall through
+    case "tab":
+      let browser = w.gBrowser;
+      let tabUsedForLoad = browser.loadOneTab(url, { referrerURI: aReferrerURI,
+                                                     referrerPolicy: aReferrerPolicy,
+                                                     charset: aCharset,
+                                                     postData: aPostData,
+                                                     inBackground: loadInBackground,
+                                                     allowThirdPartyFixup: aAllowThirdPartyFixup,
+                                                     relatedToCurrent: aRelatedToCurrent,
+                                                     originPrincipal: aPrincipal,
+                                                     triggeringPrincipal: aTriggeringPrincipal });
+      browserUsedForLoad = tabUsedForLoad.linkedBrowser;
+      break;
+  }
+
+  // Focus the content, but only if the browser used for the load is selected.
+  if (browserUsedForLoad &&
+      browserUsedForLoad == browserUsedForLoad.getTabBrowser().selectedBrowser) {
+    browserUsedForLoad.focus();
+  }
+
+  if (!loadInBackground && w.isBlankPageURL(url)) {
+    if (!w.focusAndSelectUrlBar()) {
+      console.error("Unable to focus and select address bar.")
+    }
+  }
+}
+
+// Used as an onclick handler for UI elements with link-like behavior.
+// e.g. onclick="checkForMiddleClick(this, event);"
+function checkForMiddleClick(node, event) {
+  // We should be using the disabled property here instead of the attribute,
+  // but some elements that this function is used with don't support it (e.g.
+  // menuitem).
+  if (node.getAttribute("disabled") == "true") {
+     // Do nothing
+    return;
+  }
+
+  if (event.button == 1) {
+    /* Execute the node's oncommand or command.
+     *
+     * XXX: we should use node.oncommand(event) once bug 246720 is fixed.
+     */
+    var target = node.hasAttribute("oncommand") ?
+                 node :
+                 node.ownerDocument.getElementById(node.getAttribute("command"));
+    var fn = new Function("event", target.getAttribute("oncommand"));
+    fn.call(target, event);
+
+    // If the middle-click was on part of a menu, close the menu.
+    // (Menus close automatically with left-click but not with middle-click.)
+    closeMenus(event.target);
+  }
+}
+
+// Closes all popups that are ancestors of the node.
+function closeMenus(node)
+{
+  if ("tagName" in node) {
+    if (node.namespaceURI == "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" &&
+        (node.tagName == "menupopup" || node.tagName == "popup")) {
+      node.hidePopup();
+    }
+
+    closeMenus(node.parentNode);
+  }
+}
+
+// Gather all descendant text under given document node.
+function gatherTextUnder(root) {
+  var text = "";
+  var node = root.firstChild;
+  var depth = 1;
+  while ( node && depth > 0 ) {
+    // See if this node is text.
+    if ( node.nodeType == Node.TEXT_NODE ) {
+      // Add this text to our collection.
+      text += " " + node.data;
+    } else if ( node instanceof HTMLImageElement) {
+      // If it has an alt= attribute, use that.
+      var altText = node.getAttribute( "alt" );
+      if ( altText && altText != "" ) {
+        text = altText;
+        break;
+      }
+    }
+    // Find next node to test.
+    // First, see if this node has children.
+    if ( node.hasChildNodes() ) {
+      // Go to first child.
+      node = node.firstChild;
+      depth++;
+    } else {
+      // No children, try next sibling (or parent next sibling).
+      while ( depth > 0 && !node.nextSibling ) {
+        node = node.parentNode;
+        depth--;
+      }
+      if ( node.nextSibling ) {
+        node = node.nextSibling;
+      }
+    }
+  }
+  // Strip leading whitespace.
+  text = text.replace( /^\s+/, "" );
+  // Strip trailing whitespace.
+  text = text.replace( /\s+$/, "" );
+  // Compress remaining whitespace.
+  text = text.replace( /\s+/g, " " );
+  return text;
+}
+
+// This function exists for legacy reasons.
+function getShellService() {
+  return ShellService;
+}
+
+function isBidiEnabled() {
+  // first check the pref.
+  if (Services.prefs.getBoolPref("bidi.browser.ui", false)) {
+    return true;
+  }
+
+  // if the pref isn't set, check for an RTL locale and force the pref to true
+  // if we find one.
+  var rv = false;
+
+  try {
+    var localeService = Components.classes["@mozilla.org/intl/nslocaleservice;1"]
+                                  .getService(Components.interfaces.nsILocaleService);
+    var systemLocale = localeService.getSystemLocale().getCategory("NSILOCALE_CTYPE").substr(0,3);
+
+    switch (systemLocale) {
+      case "ar-":
+      case "he-":
+      case "fa-":
+      case "ur-":
+      case "syr":
+        rv = true;
+        Services.prefs.setBoolPref("bidi.browser.ui", true);
+    }
+  } catch(e) {}
+
+  return rv;
+}
+
+#ifdef MOZ_UPDATER
+/**
+ * Opens the update manager and checks for updates to the application.
+ */
+function checkForUpdates() {
+  var um = Components.classes["@mozilla.org/updates/update-manager;1"]
+                     .getService(Components.interfaces.nsIUpdateManager);
+  var prompter = Components.classes["@mozilla.org/updates/update-prompt;1"]
+                           .createInstance(Components.interfaces.nsIUpdatePrompt);
+
+  // If there's an update ready to be applied, show the "Update Downloaded"
+  // UI instead and let the user know they have to restart the application for
+  // the changes to be applied.
+  if (um.activeUpdate && ["pending", "pending-elevate", "applied"].includes(um.activeUpdate.state)) {
+    prompter.showUpdateDownloaded(um.activeUpdate);
+  } else {
+    prompter.checkForUpdates();
+  }
+}
+#endif
+
+/**
+ * Set up the help menu software update items to show proper status,
+ * also disabling the items if update is disabled.
+ */
+function buildHelpMenu() {
+#ifdef MOZ_UPDATER
+  var updates = Components.classes["@mozilla.org/updates/update-service;1"]
+                          .getService(Components.interfaces.nsIApplicationUpdateService);
+  var um = Components.classes["@mozilla.org/updates/update-manager;1"]
+                     .getService(Components.interfaces.nsIUpdateManager);
+
+  // Disable the UI if the update enabled pref has been locked by the
+  // administrator or if we cannot update for some other reason.
+  var checkForUpdates = document.getElementById("checkForUpdates");
+  var appMenuCheckForUpdates = document.getElementById("appmenu_checkForUpdates");
+  var canCheckForUpdates = updates.canCheckForUpdates;
+  
+  checkForUpdates.setAttribute("disabled", !canCheckForUpdates);
+
+  if (appMenuCheckForUpdates) {
+    appMenuCheckForUpdates.setAttribute("disabled", !canCheckForUpdates);
+  }
+
+  if (!canCheckForUpdates) {
+    return;
+  }
+
+  var strings = document.getElementById("bundle_browser");
+  var activeUpdate = um.activeUpdate;
+
+  // If there's an active update, substitute its name into the label
+  // we show for this item, otherwise display a generic label.
+  function getStringWithUpdateName(key) {
+    if (activeUpdate && activeUpdate.name) {
+      return strings.getFormattedString(key, [activeUpdate.name]);
+    }
+    return strings.getString(key + "Fallback");
+  }
+
+  // By default, show "Check for Updates..." from updatesItem_default or
+  // updatesItem_defaultFallback
+  var key = "default";
+  if (activeUpdate) {
+    switch (activeUpdate.state) {
+      case "downloading":
+        // If we're downloading an update at present, show the text:
+        // "Downloading Thunderbird x.x..." from updatesItem_downloading or
+        // updatesItem_downloadingFallback, otherwise we're paused, and show
+        // "Resume Downloading Thunderbird x.x..." from updatesItem_resume or
+        // updatesItem_resumeFallback
+        key = updates.isDownloading ? "downloading" : "resume";
+        break;
+      case "pending":
+        // If we're waiting for the user to restart, show: "Apply Downloaded
+        // Updates Now..." from updatesItem_pending or
+        // updatesItem_pendingFallback
+        key = "pending";
+        break;
+    }
+  }
+
+  checkForUpdates.label = getStringWithUpdateName("updatesItem_" + key);
+
+  if (appMenuCheckForUpdates) {
+    appMenuCheckForUpdates.label = getStringWithUpdateName("updatesItem_" + key);
+  }
+
+  // updatesItem_default.accesskey, updatesItem_downloading.accesskey,
+  // updatesItem_resume.accesskey or updatesItem_pending.accesskey
+  checkForUpdates.accessKey = strings.getString("updatesItem_" + key + ".accesskey");
+
+  if (appMenuCheckForUpdates) {
+    appMenuCheckForUpdates.accessKey = strings.getString("updatesItem_" + key + ".accesskey");
+  }
+
+  if (um.activeUpdate && updates.isDownloading) {
+    checkForUpdates.setAttribute("loading", "true");
+    if (appMenuCheckForUpdates) {
+      appMenuCheckForUpdates.setAttribute("loading", "true");
+    }
+  } else {
+    checkForUpdates.removeAttribute("loading");
+    if (appMenuCheckForUpdates) {
+      appMenuCheckForUpdates.removeAttribute("loading");
+    }
+  }
+#else
+  // Some extensions may rely on these being present so only hide the about
+  // separator when there are no elements besides the check for updates menuitem
+  // in between the about separator and the updates separator.
+  var updatesSeparator = document.getElementById("updatesSeparator");
+  var aboutSeparator = document.getElementById("aboutSeparator");
+  var checkForUpdates = document.getElementById("checkForUpdates");
+  if (updatesSeparator.nextSibling === checkForUpdates &&
+      checkForUpdates.nextSibling === aboutSeparator) {
+    updatesSeparator.hidden = true;
+  }
+#endif
+}
+
+
+function openAboutDialog() {
+  var enumerator = Services.wm.getEnumerator("Browser:About");
+  while (enumerator.hasMoreElements()) {
+    // Only open one about window (Bug 599573)
+    let win = enumerator.getNext();
+    win.focus();
+    return;
+  }
+
+#ifdef XP_WIN
+  var features = "chrome,centerscreen,dependent";
+#else
+  var features = "chrome,centerscreen,dependent,dialog=no";
+#endif
+  window.openDialog("chrome://browser/content/aboutDialog.xul", "", features);
+}
+
+function openPreferences(paneID, extraArgs) {
+  var instantApply = Services.prefs.getBoolPref("browser.preferences.instantApply", false);
+  var features = "chrome,titlebar,toolbar,centerscreen" + (instantApply ? ",dialog=no" : ",modal");
+
+  var win = Services.wm.getMostRecentWindow("Browser:Preferences");
+  if (win) {
+    win.focus();
+    if (paneID) {
+      var pane = win.document.getElementById(paneID);
+      win.document.documentElement.showPane(pane);
+    }
+
+    if (extraArgs && extraArgs["advancedTab"]) {
+      var advancedPaneTabs = win.document.getElementById("advancedPrefs");
+      advancedPaneTabs.selectedTab = win.document.getElementById(extraArgs["advancedTab"]);
+    }
+
+    return win;
+  }
+
+  return openDialog("chrome://browser/content/preferences/preferences.xul",
+                    "Preferences", features, paneID, extraArgs);
+}
+
+function openAdvancedPreferences(tabID) {
+  openPreferences("paneAdvanced", { "advancedTab" : tabID });
+}
+
+/**
+ * Opens the release notes page for this version of the application.
+ */
+function openReleaseNotes() { 
+  var relnotesURL = Components.classes["@mozilla.org/toolkit/URLFormatterService;1"]
+                              .getService(Components.interfaces.nsIURLFormatter)
+                              .formatURLPref("app.releaseNotesURL");
+  
+  openUILinkIn(relnotesURL, "tab");
+}
+
+/**
+ * Opens the troubleshooting information (about:support) page for this version
+ * of the application.
+ */
+function openTroubleshootingPage() {
+  openUILinkIn("about:support", "tab");
+}
+
+/**
+ * Opens the feedback page for this version of the application.
+ */
+function openFeedbackPage() {
+  openUILinkIn(Services.prefs.getCharPref("browser.feedback.url"), "tab");
+}
+
+function isElementVisible(aElement) {
+  if (!aElement) {
+    return false;
+  }
+
+  // If aElement or a direct or indirect parent is hidden or collapsed,
+  // height, width or both will be 0.
+  var bo = aElement.boxObject;
+  return (bo.height > 0 && bo.width > 0);
+}
+
+function makeURLAbsolute(aBase, aUrl)
+{
+  // Note:  makeURI() will throw if aUri is not a valid URI
+  return makeURI(aUrl, null, makeURI(aBase)).spec;
+}
+
+
+/**
+ * openNewTabWith: opens a new tab with the given URL.
+ *
+ * @param aURL
+ *        The URL to open (as a string).
+ * @param aDocument
+ *        The document from which the URL came, or null. This is used to set the
+ *        referrer header and to do a security check of whether the document is
+ *        allowed to reference the URL. If null, there will be no referrer
+ *        header and no security check.
+ * @param aPostData
+ *        Form POST data, or null.
+ * @param aEvent
+ *        The triggering event (for the purpose of determining whether to open
+ *        in the background), or null.
+ * @param aAllowThirdPartyFixup
+ *        If true, then we allow the URL text to be sent to third party services
+ *        (e.g., Google's I Feel Lucky) for interpretation. This parameter may
+ *        be undefined in which case it is treated as false.
+ * @param [optional] aReferrer
+ *        If aDocument is null, then this will be used as the referrer.
+ *        There will be no security check.
+ * @param [optional] aReferrerPolicy
+ *        Referrer policy - Ci.nsIHttpChannel.REFERRER_POLICY_*.
+ */ 
+function openNewTabWith(aURL, aDocument, aPostData, aEvent,
+                        aAllowThirdPartyFixup, aReferrer, aReferrerPolicy) {
+  if (aDocument) {
+    urlSecurityCheck(aURL, aDocument.nodePrincipal);
+  }
+
+  // As in openNewWindowWith(), we want to pass the charset of the
+  // current document over to a new tab.
+  var originCharset = aDocument && aDocument.characterSet;
+  if (!originCharset &&
+      document.documentElement.getAttribute("windowtype") == "navigator:browser") {
+    originCharset = window.content.document.characterSet;
+  }
+
+  openLinkIn(aURL, aEvent && aEvent.shiftKey ? "tabshifted" : "tab",
+             { charset: originCharset,
+               postData: aPostData,
+               allowThirdPartyFixup: aAllowThirdPartyFixup,
+               referrerURI: aDocument ? aDocument.documentURIObject : aReferrer,
+               referrerPolicy: aReferrerPolicy,
+             });
+}
+
+function openNewWindowWith(aURL, aDocument, aPostData, aAllowThirdPartyFixup,
+                           aReferrer, aReferrerPolicy) {
+  if (aDocument) {
+    urlSecurityCheck(aURL, aDocument.nodePrincipal);
+  }
+
+  // if and only if the current window is a browser window and it has a
+  // document with a character set, then extract the current charset menu
+  // setting from the current document and use it to initialize the new browser
+  // window...
+  var originCharset = aDocument && aDocument.characterSet;
+  if (!originCharset &&
+      document.documentElement.getAttribute("windowtype") == "navigator:browser") {
+    originCharset = window.content.document.characterSet;
+  }
+
+  openLinkIn(aURL, "window",
+             { charset: originCharset,
+               postData: aPostData,
+               allowThirdPartyFixup: aAllowThirdPartyFixup,
+               referrerURI: aDocument ? aDocument.documentURIObject : aReferrer,
+               referrerPolicy: aReferrerPolicy,
+             });
+}
+
+/**
+ * isValidFeed: checks whether the given data represents a valid feed.
+ *
+ * @param  aLink
+ *         An object representing a feed with title, href and type.
+ * @param  aPrincipal
+ *         The principal of the document, used for security check.
+ * @param  aIsFeed
+ *         Whether this is already a known feed or not, if true only a security
+ *         check will be performed.
+ */ 
+function isValidFeed(aLink, aPrincipal, aIsFeed) {
+  if (!aLink || !aPrincipal) {
+    return false;
+  }
+
+  var type = aLink.type.toLowerCase().replace(/^\s+|\s*(?:;.*)?$/g, "");
+  if (!aIsFeed) {
+    aIsFeed = (type == "application/rss+xml" ||
+               type == "application/atom+xml");
+  }
+
+  if (aIsFeed) {
+    try {
+      urlSecurityCheck(aLink.href, aPrincipal,
+                       Components.interfaces.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
+      return type || "application/rss+xml";
+    } catch(ex) {}
+  }
+
+  return null;
+}
+
+// aCalledFromModal is optional
+function openHelpLink(aHelpTopic, aCalledFromModal) {
+  var url = Components.classes["@mozilla.org/toolkit/URLFormatterService;1"]
+                      .getService(Components.interfaces.nsIURLFormatter)
+                      .formatURLPref("app.support.baseURL");
+  url += aHelpTopic;
+
+  var where = aCalledFromModal ? "window" : "tab";
+  openUILinkIn(url, where);
+}
+
+function openPrefsHelp() {
+  // non-instant apply prefwindows are usually modal, so we can't open in the topmost window, 
+  // since its probably behind the window.
+  var instantApply = Services.prefs.getBoolPref("browser.preferences.instantApply");
+
+  var helpTopic = document.getElementsByTagName("prefwindow")[0].currentPane.helpTopic;
+  openHelpLink(helpTopic, !instantApply);
+}
+
+function trimURL(aURL) {
+  // This function must not modify the given URL such that calling
+  // nsIURIFixup::createFixupURI with the result will produce a different URI.
+  return aURL /* remove single trailing slash for http/https/ftp URLs */
+             .replace(/^((?:http|https|ftp):\/\/[^/]+)\/$/, "$1")
+              /* remove http:// unless the host starts with "ftp\d*\." or contains "@" */
+             .replace(/^http:\/\/((?!ftp\d*\.)[^\/@]+(?:\/|$))/, "$1");
+}