Add m-esr52 at 52.6.0

1 files changed, 8281 insertions, 0 deletions

diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
new file mode 100755
index 000000000..b794386f7
--- /dev/null
+++ b/browser/base/content/browser.js
@@ -0,0 +1,8281 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var Ci = Components.interfaces;
+var Cu = Components.utils;
+var Cc = Components.classes;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/ContextualIdentityService.jsm");
+Cu.import("resource://gre/modules/NotificationDB.jsm");
+
+// lazy module getters
+[
+  ["AboutHome", "resource:///modules/AboutHome.jsm"],
+  ["AddonWatcher", "resource://gre/modules/AddonWatcher.jsm"],
+  ["AppConstants", "resource://gre/modules/AppConstants.jsm"],
+  ["BrowserUITelemetry", "resource:///modules/BrowserUITelemetry.jsm"],
+  ["BrowserUsageTelemetry", "resource:///modules/BrowserUsageTelemetry.jsm"],
+  ["BrowserUtils", "resource://gre/modules/BrowserUtils.jsm"],
+  ["CastingApps", "resource:///modules/CastingApps.jsm"],
+  ["CharsetMenu", "resource://gre/modules/CharsetMenu.jsm"],
+  ["Color", "resource://gre/modules/Color.jsm"],
+  ["ContentSearch", "resource:///modules/ContentSearch.jsm"],
+  ["Deprecated", "resource://gre/modules/Deprecated.jsm"],
+  ["E10SUtils", "resource:///modules/E10SUtils.jsm"],
+  ["FormValidationHandler", "resource:///modules/FormValidationHandler.jsm"],
+  ["GMPInstallManager", "resource://gre/modules/GMPInstallManager.jsm"],
+  ["LightweightThemeManager", "resource://gre/modules/LightweightThemeManager.jsm"],
+  ["Log", "resource://gre/modules/Log.jsm"],
+  ["LoginManagerParent", "resource://gre/modules/LoginManagerParent.jsm"],
+  ["NewTabUtils", "resource://gre/modules/NewTabUtils.jsm"],
+  ["PageThumbs", "resource://gre/modules/PageThumbs.jsm"],
+  ["PluralForm", "resource://gre/modules/PluralForm.jsm"],
+  ["Preferences", "resource://gre/modules/Preferences.jsm"],
+  ["PrivateBrowsingUtils", "resource://gre/modules/PrivateBrowsingUtils.jsm"],
+  ["ProcessHangMonitor", "resource:///modules/ProcessHangMonitor.jsm"],
+  ["PromiseUtils", "resource://gre/modules/PromiseUtils.jsm"],
+  ["ReaderMode", "resource://gre/modules/ReaderMode.jsm"],
+  ["ReaderParent", "resource:///modules/ReaderParent.jsm"],
+  ["RecentWindow", "resource:///modules/RecentWindow.jsm"],
+  ["SessionStore", "resource:///modules/sessionstore/SessionStore.jsm"],
+  ["ShortcutUtils", "resource://gre/modules/ShortcutUtils.jsm"],
+  ["SimpleServiceDiscovery", "resource://gre/modules/SimpleServiceDiscovery.jsm"],
+  ["SitePermissions", "resource:///modules/SitePermissions.jsm"],
+  ["Social", "resource:///modules/Social.jsm"],
+  ["TabCrashHandler", "resource:///modules/ContentCrashHandlers.jsm"],
+  ["Task", "resource://gre/modules/Task.jsm"],
+  ["TelemetryStopwatch", "resource://gre/modules/TelemetryStopwatch.jsm"],
+  ["Translation", "resource:///modules/translation/Translation.jsm"],
+  ["UITour", "resource:///modules/UITour.jsm"],
+  ["UpdateUtils", "resource://gre/modules/UpdateUtils.jsm"],
+  ["Weave", "resource://services-sync/main.js"],
+  ["fxAccounts", "resource://gre/modules/FxAccounts.jsm"],
+  ["gDevTools", "resource://devtools/client/framework/gDevTools.jsm"],
+  ["gDevToolsBrowser", "resource://devtools/client/framework/gDevTools.jsm"],
+  ["webrtcUI", "resource:///modules/webrtcUI.jsm", ]
+].forEach(([name, resource]) => XPCOMUtils.defineLazyModuleGetter(this, name, resource));
+
+XPCOMUtils.defineLazyModuleGetter(this, "SafeBrowsing",
+  "resource://gre/modules/SafeBrowsing.jsm");
+
+if (AppConstants.MOZ_CRASHREPORTER) {
+  XPCOMUtils.defineLazyModuleGetter(this, "PluginCrashReporter",
+    "resource:///modules/ContentCrashHandlers.jsm");
+}
+
+// lazy service getters
+[
+  ["Favicons", "@mozilla.org/browser/favicon-service;1", "mozIAsyncFavicons"],
+  ["WindowsUIUtils", "@mozilla.org/windows-ui-utils;1", "nsIWindowsUIUtils"],
+  ["gAboutNewTabService", "@mozilla.org/browser/aboutnewtab-service;1", "nsIAboutNewTabService"],
+  ["gDNSService", "@mozilla.org/network/dns-service;1", "nsIDNSService"],
+].forEach(([name, cc, ci]) => XPCOMUtils.defineLazyServiceGetter(this, name, cc, ci));
+
+if (AppConstants.MOZ_CRASHREPORTER) {
+  XPCOMUtils.defineLazyServiceGetter(this, "gCrashReporter",
+                                     "@mozilla.org/xre/app-info;1",
+                                     "nsICrashReporter");
+}
+
+
+XPCOMUtils.defineLazyGetter(this, "BrowserToolboxProcess", function() {
+  let tmp = {};
+  Cu.import("resource://devtools/client/framework/ToolboxProcess.jsm", tmp);
+  return tmp.BrowserToolboxProcess;
+});
+
+XPCOMUtils.defineLazyGetter(this, "gBrowserBundle", function() {
+  return Services.strings.createBundle('chrome://browser/locale/browser.properties');
+});
+
+XPCOMUtils.defineLazyGetter(this, "gCustomizeMode", function() {
+  let scope = {};
+  Cu.import("resource:///modules/CustomizeMode.jsm", scope);
+  return new scope.CustomizeMode(window);
+});
+
+XPCOMUtils.defineLazyGetter(window, "gShowPageResizers", function () {
+  // Only show resizers on Windows 2000 and XP
+  return AppConstants.isPlatformAndVersionAtMost("win", "5.9");
+});
+
+XPCOMUtils.defineLazyGetter(this, "gPrefService", function() {
+  return Services.prefs;
+});
+
+XPCOMUtils.defineLazyGetter(this, "InlineSpellCheckerUI", function() {
+  let tmp = {};
+  Cu.import("resource://gre/modules/InlineSpellChecker.jsm", tmp);
+  return new tmp.InlineSpellChecker();
+});
+
+XPCOMUtils.defineLazyGetter(this, "PageMenuParent", function() {
+  let tmp = {};
+  Cu.import("resource://gre/modules/PageMenu.jsm", tmp);
+  return new tmp.PageMenuParent();
+});
+
+XPCOMUtils.defineLazyGetter(this, "PopupNotifications", function () {
+  let tmp = {};
+  Cu.import("resource://gre/modules/PopupNotifications.jsm", tmp);
+  try {
+    return new tmp.PopupNotifications(gBrowser,
+                                      document.getElementById("notification-popup"),
+                                      document.getElementById("notification-popup-box"));
+  } catch (ex) {
+    Cu.reportError(ex);
+    return null;
+  }
+});
+
+XPCOMUtils.defineLazyGetter(this, "Win7Features", function () {
+  if (AppConstants.platform != "win")
+    return null;
+
+  const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1";
+  if (WINTASKBAR_CONTRACTID in Cc &&
+      Cc[WINTASKBAR_CONTRACTID].getService(Ci.nsIWinTaskbar).available) {
+    let AeroPeek = Cu.import("resource:///modules/WindowsPreviewPerTab.jsm", {}).AeroPeek;
+    return {
+      onOpenWindow: function () {
+        AeroPeek.onOpenWindow(window);
+      },
+      onCloseWindow: function () {
+        AeroPeek.onCloseWindow(window);
+      }
+    };
+  }
+  return null;
+});
+
+const nsIWebNavigation = Ci.nsIWebNavigation;
+
+var gLastBrowserCharset = null;
+var gLastValidURLStr = "";
+var gInPrintPreviewMode = false;
+var gContextMenu = null; // nsContextMenu instance
+var gMultiProcessBrowser =
+  window.QueryInterface(Ci.nsIInterfaceRequestor)
+        .getInterface(Ci.nsIWebNavigation)
+        .QueryInterface(Ci.nsILoadContext)
+        .useRemoteTabs;
+var gAppInfo = Cc["@mozilla.org/xre/app-info;1"]
+                  .getService(Ci.nsIXULAppInfo)
+                  .QueryInterface(Ci.nsIXULRuntime);
+
+if (AppConstants.platform != "macosx") {
+  var gEditUIVisible = true;
+}
+
+/* globals gBrowser, gNavToolbox, gURLBar, gNavigatorBundle*/
+[
+  ["gBrowser",            "content"],
+  ["gNavToolbox",         "navigator-toolbox"],
+  ["gURLBar",             "urlbar"],
+  ["gNavigatorBundle",    "bundle_browser"]
+].forEach(function (elementGlobal) {
+  var [name, id] = elementGlobal;
+  window.__defineGetter__(name, function () {
+    var element = document.getElementById(id);
+    if (!element)
+      return null;
+    delete window[name];
+    return window[name] = element;
+  });
+  window.__defineSetter__(name, function (val) {
+    delete window[name];
+    return window[name] = val;
+  });
+});
+
+// Smart getter for the findbar.  If you don't wish to force the creation of
+// the findbar, check gFindBarInitialized first.
+
+this.__defineGetter__("gFindBar", function() {
+  return window.gBrowser.getFindBar();
+});
+
+this.__defineGetter__("gFindBarInitialized", function() {
+  return window.gBrowser.isFindBarInitialized();
+});
+
+this.__defineGetter__("AddonManager", function() {
+  let tmp = {};
+  Cu.import("resource://gre/modules/AddonManager.jsm", tmp);
+  return this.AddonManager = tmp.AddonManager;
+});
+this.__defineSetter__("AddonManager", function (val) {
+  delete this.AddonManager;
+  return this.AddonManager = val;
+});
+
+
+var gInitialPages = [
+  "about:blank",
+  "about:newtab",
+  "about:home",
+  "about:privatebrowsing",
+  "about:welcomeback",
+  "about:sessionrestore"
+];
+
+function* browserWindows() {
+  let windows = Services.wm.getEnumerator("navigator:browser");
+  while (windows.hasMoreElements())
+    yield windows.getNext();
+}
+
+/**
+* We can avoid adding multiple load event listeners and save some time by adding
+* one listener that calls all real handlers.
+*/
+function pageShowEventHandlers(persisted) {
+  XULBrowserWindow.asyncUpdateUI();
+}
+
+function UpdateBackForwardCommands(aWebNavigation) {
+  var backBroadcaster = document.getElementById("Browser:Back");
+  var forwardBroadcaster = document.getElementById("Browser:Forward");
+
+  // Avoid setting attributes on broadcasters if the value hasn't changed!
+  // Remember, guys, setting attributes on elements is expensive!  They
+  // get inherited into anonymous content, broadcast to other widgets, etc.!
+  // Don't do it if the value hasn't changed! - dwh
+
+  var backDisabled = backBroadcaster.hasAttribute("disabled");
+  var forwardDisabled = forwardBroadcaster.hasAttribute("disabled");
+  if (backDisabled == aWebNavigation.canGoBack) {
+    if (backDisabled)
+      backBroadcaster.removeAttribute("disabled");
+    else
+      backBroadcaster.setAttribute("disabled", true);
+  }
+
+  if (forwardDisabled == aWebNavigation.canGoForward) {
+    if (forwardDisabled)
+      forwardBroadcaster.removeAttribute("disabled");
+    else
+      forwardBroadcaster.setAttribute("disabled", true);
+  }
+}
+
+/**
+ * Click-and-Hold implementation for the Back and Forward buttons
+ * XXXmano: should this live in toolbarbutton.xml?
+ */
+function SetClickAndHoldHandlers() {
+  // Bug 414797: Clone the back/forward buttons' context menu into both buttons.
+  let popup = document.getElementById("backForwardMenu").cloneNode(true);
+  popup.removeAttribute("id");
+  // Prevent the back/forward buttons' context attributes from being inherited.
+  popup.setAttribute("context", "");
+
+  let backButton = document.getElementById("back-button");
+  backButton.setAttribute("type", "menu");
+  backButton.appendChild(popup);
+  gClickAndHoldListenersOnElement.add(backButton);
+
+  let forwardButton = document.getElementById("forward-button");
+  popup = popup.cloneNode(true);
+  forwardButton.setAttribute("type", "menu");
+  forwardButton.appendChild(popup);
+  gClickAndHoldListenersOnElement.add(forwardButton);
+}
+
+
+const gClickAndHoldListenersOnElement = {
+  _timers: new Map(),
+
+  _mousedownHandler(aEvent) {
+    if (aEvent.button != 0 ||
+        aEvent.currentTarget.open ||
+        aEvent.currentTarget.disabled)
+      return;
+
+    // Prevent the menupopup from opening immediately
+    aEvent.currentTarget.firstChild.hidden = true;
+
+    aEvent.currentTarget.addEventListener("mouseout", this, false);
+    aEvent.currentTarget.addEventListener("mouseup", this, false);
+    this._timers.set(aEvent.currentTarget, setTimeout((b) => this._openMenu(b), 500, aEvent.currentTarget));
+  },
+
+  _clickHandler(aEvent) {
+    if (aEvent.button == 0 &&
+        aEvent.target == aEvent.currentTarget &&
+        !aEvent.currentTarget.open &&
+        !aEvent.currentTarget.disabled) {
+      let cmdEvent = document.createEvent("xulcommandevent");
+      cmdEvent.initCommandEvent("command", true, true, window, 0,
+                                aEvent.ctrlKey, aEvent.altKey, aEvent.shiftKey,
+                                aEvent.metaKey, null);
+      aEvent.currentTarget.dispatchEvent(cmdEvent);
+
+      // This is here to cancel the XUL default event
+      // dom.click() triggers a command even if there is a click handler
+      // however this can now be prevented with preventDefault().
+      aEvent.preventDefault();
+    }
+  },
+
+  _openMenu(aButton) {
+    this._cancelHold(aButton);
+    aButton.firstChild.hidden = false;
+    aButton.open = true;
+  },
+
+  _mouseoutHandler(aEvent) {
+    let buttonRect = aEvent.currentTarget.getBoundingClientRect();
+    if (aEvent.clientX >= buttonRect.left &&
+        aEvent.clientX <= buttonRect.right &&
+        aEvent.clientY >= buttonRect.bottom)
+      this._openMenu(aEvent.currentTarget);
+    else
+      this._cancelHold(aEvent.currentTarget);
+  },
+
+  _mouseupHandler(aEvent) {
+    this._cancelHold(aEvent.currentTarget);
+  },
+
+  _cancelHold(aButton) {
+    clearTimeout(this._timers.get(aButton));
+    aButton.removeEventListener("mouseout", this, false);
+    aButton.removeEventListener("mouseup", this, false);
+  },
+
+  handleEvent(e) {
+    switch (e.type) {
+      case "mouseout":
+        this._mouseoutHandler(e);
+        break;
+      case "mousedown":
+        this._mousedownHandler(e);
+        break;
+      case "click":
+        this._clickHandler(e);
+        break;
+      case "mouseup":
+        this._mouseupHandler(e);
+        break;
+    }
+  },
+
+  remove(aButton) {
+    aButton.removeEventListener("mousedown", this, true);
+    aButton.removeEventListener("click", this, true);
+  },
+
+  add(aElm) {
+    this._timers.delete(aElm);
+
+    aElm.addEventListener("mousedown", this, true);
+    aElm.addEventListener("click", this, true);
+  }
+};
+
+const gSessionHistoryObserver = {
+  observe: function(subject, topic, data)
+  {
+    if (topic != "browser:purge-session-history")
+      return;
+
+    var backCommand = document.getElementById("Browser:Back");
+    backCommand.setAttribute("disabled", "true");
+    var fwdCommand = document.getElementById("Browser:Forward");
+    fwdCommand.setAttribute("disabled", "true");
+
+    // Hide session restore button on about:home
+    window.messageManager.broadcastAsyncMessage("Browser:HideSessionRestoreButton");
+
+    // Clear undo history of the URL bar
+    gURLBar.editor.transactionManager.clear()
+  }
+};
+
+/**
+ * Given a starting docshell and a URI to look up, find the docshell the URI
+ * is loaded in.
+ * @param   aDocument
+ *          A document to find instead of using just a URI - this is more specific.
+ * @param   aDocShell
+ *          The doc shell to start at
+ * @param   aSoughtURI
+ *          The URI that we're looking for
+ * @returns The doc shell that the sought URI is loaded in. Can be in
+ *          subframes.
+ */
+function findChildShell(aDocument, aDocShell, aSoughtURI) {
+  aDocShell.QueryInterface(Components.interfaces.nsIWebNavigation);
+  aDocShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
+  var doc = aDocShell.getInterface(Components.interfaces.nsIDOMDocument);
+  if ((aDocument && doc == aDocument) ||
+      (aSoughtURI && aSoughtURI.spec == aDocShell.currentURI.spec))
+    return aDocShell;
+
+  var node = aDocShell.QueryInterface(Components.interfaces.nsIDocShellTreeItem);
+  for (var i = 0; i < node.childCount; ++i) {
+    var docShell = node.getChildAt(i);
+    docShell = findChildShell(aDocument, docShell, aSoughtURI);
+    if (docShell)
+      return docShell;
+  }
+  return null;
+}
+
+var gPopupBlockerObserver = {
+  _reportButton: null,
+
+  onReportButtonMousedown: function (aEvent)
+  {
+    // If this method is called on the same event tick as the popup gets
+    // hidden, do nothing to avoid re-opening the popup.
+    if (aEvent.button != 0 || aEvent.target != this._reportButton || this.isPopupHidingTick)
+      return;
+
+    document.getElementById("blockedPopupOptions")
+            .openPopup(this._reportButton, "after_end", 0, 2, false, false, aEvent);
+  },
+
+  handleEvent: function (aEvent)
+  {
+    if (aEvent.originalTarget != gBrowser.selectedBrowser)
+      return;
+
+    if (!this._reportButton)
+      this._reportButton = document.getElementById("page-report-button");
+
+    if (!gBrowser.selectedBrowser.blockedPopups ||
+        !gBrowser.selectedBrowser.blockedPopups.length) {
+      // Hide the icon in the location bar (if the location bar exists)
+      this._reportButton.hidden = true;
+
+      // Hide the notification box (if it's visible).
+      let notificationBox = gBrowser.getNotificationBox();
+      let notification = notificationBox.getNotificationWithValue("popup-blocked");
+      if (notification) {
+        notificationBox.removeNotification(notification, false);
+      }
+      return;
+    }
+
+    this._reportButton.hidden = false;
+
+    // Only show the notification again if we've not already shown it. Since
+    // notifications are per-browser, we don't need to worry about re-adding
+    // it.
+    if (!gBrowser.selectedBrowser.blockedPopups.reported) {
+      if (gPrefService.getBoolPref("privacy.popups.showBrowserMessage")) {
+        var brandBundle = document.getElementById("bundle_brand");
+        var brandShortName = brandBundle.getString("brandShortName");
+        var popupCount = gBrowser.selectedBrowser.blockedPopups.length;
+
+        var stringKey = AppConstants.platform == "win"
+                        ? "popupWarningButton"
+                        : "popupWarningButtonUnix";
+
+        var popupButtonText = gNavigatorBundle.getString(stringKey);
+        var popupButtonAccesskey = gNavigatorBundle.getString(stringKey + ".accesskey");
+
+        var messageBase = gNavigatorBundle.getString("popupWarning.message");
+        var message = PluralForm.get(popupCount, messageBase)
+                                .replace("#1", brandShortName)
+                                .replace("#2", popupCount);
+
+        let notificationBox = gBrowser.getNotificationBox();
+        let notification = notificationBox.getNotificationWithValue("popup-blocked");
+        if (notification) {
+          notification.label = message;
+        }
+        else {
+          var buttons = [{
+            label: popupButtonText,
+            accessKey: popupButtonAccesskey,
+            popup: "blockedPopupOptions",
+            callback: null
+          }];
+
+          const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
+          notificationBox.appendNotification(message, "popup-blocked",
+                                             "chrome://browser/skin/Info.png",
+                                             priority, buttons);
+        }
+      }
+
+      // Record the fact that we've reported this blocked popup, so we don't
+      // show it again.
+      gBrowser.selectedBrowser.blockedPopups.reported = true;
+    }
+  },
+
+  toggleAllowPopupsForSite: function (aEvent)
+  {
+    var pm = Services.perms;
+    var shouldBlock = aEvent.target.getAttribute("block") == "true";
+    var perm = shouldBlock ? pm.DENY_ACTION : pm.ALLOW_ACTION;
+    pm.add(gBrowser.currentURI, "popup", perm);
+
+    if (!shouldBlock)
+      this.showAllBlockedPopups(gBrowser.selectedBrowser);
+
+    gBrowser.getNotificationBox().removeCurrentNotification();
+  },
+
+  fillPopupList: function (aEvent)
+  {
+    // XXXben - rather than using |currentURI| here, which breaks down on multi-framed sites
+    //          we should really walk the blockedPopups and create a list of "allow for <host>"
+    //          menuitems for the common subset of hosts present in the report, this will
+    //          make us frame-safe.
+    //
+    // XXXjst - Note that when this is fixed to work with multi-framed sites,
+    //          also back out the fix for bug 343772 where
+    //          nsGlobalWindow::CheckOpenAllow() was changed to also
+    //          check if the top window's location is whitelisted.
+    let browser = gBrowser.selectedBrowser;
+    var uri = browser.currentURI;
+    var blockedPopupAllowSite = document.getElementById("blockedPopupAllowSite");
+    try {
+      blockedPopupAllowSite.removeAttribute("hidden");
+
+      var pm = Services.perms;
+      if (pm.testPermission(uri, "popup") == pm.ALLOW_ACTION) {
+        // Offer an item to block popups for this site, if a whitelist entry exists
+        // already for it.
+        let blockString = gNavigatorBundle.getFormattedString("popupBlock", [uri.host || uri.spec]);
+        blockedPopupAllowSite.setAttribute("label", blockString);
+        blockedPopupAllowSite.setAttribute("block", "true");
+      }
+      else {
+        // Offer an item to allow popups for this site
+        let allowString = gNavigatorBundle.getFormattedString("popupAllow", [uri.host || uri.spec]);
+        blockedPopupAllowSite.setAttribute("label", allowString);
+        blockedPopupAllowSite.removeAttribute("block");
+      }
+    }
+    catch (e) {
+      blockedPopupAllowSite.setAttribute("hidden", "true");
+    }
+
+    if (PrivateBrowsingUtils.isWindowPrivate(window))
+      blockedPopupAllowSite.setAttribute("disabled", "true");
+    else
+      blockedPopupAllowSite.removeAttribute("disabled");
+
+    let blockedPopupDontShowMessage = document.getElementById("blockedPopupDontShowMessage");
+    let showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
+    blockedPopupDontShowMessage.setAttribute("checked", !showMessage);
+    if (aEvent.target.anchorNode.id == "page-report-button") {
+      aEvent.target.anchorNode.setAttribute("open", "true");
+      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromLocationbar"));
+    } else {
+      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromMessage"));
+    }
+
+    let blockedPopupsSeparator =
+        document.getElementById("blockedPopupsSeparator");
+    blockedPopupsSeparator.setAttribute("hidden", true);
+
+    gBrowser.selectedBrowser.retrieveListOfBlockedPopups().then(blockedPopups => {
+      let foundUsablePopupURI = false;
+      if (blockedPopups) {
+        for (let i = 0; i < blockedPopups.length; i++) {
+          let blockedPopup = blockedPopups[i];
+
+          // popupWindowURI will be null if the file picker popup is blocked.
+          // xxxdz this should make the option say "Show file picker" and do it (Bug 590306)
+          if (!blockedPopup.popupWindowURIspec)
+            continue;
+
+          var popupURIspec = blockedPopup.popupWindowURIspec;
+
+          // Sometimes the popup URI that we get back from the blockedPopup
+          // isn't useful (for instance, netscape.com's popup URI ends up
+          // being "http://www.netscape.com", which isn't really the URI of
+          // the popup they're trying to show).  This isn't going to be
+          // useful to the user, so we won't create a menu item for it.
+          if (popupURIspec == "" || popupURIspec == "about:blank" ||
+              popupURIspec == "<self>" ||
+              popupURIspec == uri.spec)
+            continue;
+
+          // Because of the short-circuit above, we may end up in a situation
+          // in which we don't have any usable popup addresses to show in
+          // the menu, and therefore we shouldn't show the separator.  However,
+          // since we got past the short-circuit, we must've found at least
+          // one usable popup URI and thus we'll turn on the separator later.
+          foundUsablePopupURI = true;
+
+          var menuitem = document.createElement("menuitem");
+          var label = gNavigatorBundle.getFormattedString("popupShowPopupPrefix",
+                                                          [popupURIspec]);
+          menuitem.setAttribute("label", label);
+          menuitem.setAttribute("oncommand", "gPopupBlockerObserver.showBlockedPopup(event);");
+          menuitem.setAttribute("popupReportIndex", i);
+          menuitem.popupReportBrowser = browser;
+          aEvent.target.appendChild(menuitem);
+        }
+      }
+
+      // Show the separator if we added any
+      // showable popup addresses to the menu.
+      if (foundUsablePopupURI)
+        blockedPopupsSeparator.removeAttribute("hidden");
+    }, null);
+  },
+
+  onPopupHiding: function (aEvent) {
+    if (aEvent.target.anchorNode.id == "page-report-button")
+      aEvent.target.anchorNode.removeAttribute("open");
+
+    this.isPopupHidingTick = true;
+    setTimeout(() => this.isPopupHidingTick = false, 0);
+
+    let item = aEvent.target.lastChild;
+    while (item && item.getAttribute("observes") != "blockedPopupsSeparator") {
+      let next = item.previousSibling;
+      item.parentNode.removeChild(item);
+      item = next;
+    }
+  },
+
+  showBlockedPopup: function (aEvent)
+  {
+    var target = aEvent.target;
+    var popupReportIndex = target.getAttribute("popupReportIndex");
+    let browser = target.popupReportBrowser;
+    browser.unblockPopup(popupReportIndex);
+  },
+
+  showAllBlockedPopups: function (aBrowser)
+  {
+    aBrowser.retrieveListOfBlockedPopups().then(popups => {
+      for (let i = 0; i < popups.length; i++) {
+        if (popups[i].popupWindowURIspec)
+          aBrowser.unblockPopup(i);
+      }
+    }, null);
+  },
+
+  editPopupSettings: function ()
+  {
+    var host = "";
+    try {
+      host = gBrowser.currentURI.host;
+    }
+    catch (e) { }
+
+    var bundlePreferences = document.getElementById("bundle_preferences");
+    var params = { blockVisible   : false,
+                   sessionVisible : false,
+                   allowVisible   : true,
+                   prefilledHost  : host,
+                   permissionType : "popup",
+                   windowTitle    : bundlePreferences.getString("popuppermissionstitle"),
+                   introText      : bundlePreferences.getString("popuppermissionstext") };
+    var existingWindow = Services.wm.getMostRecentWindow("Browser:Permissions");
+    if (existingWindow) {
+      existingWindow.initWithParams(params);
+      existingWindow.focus();
+    }
+    else
+      window.openDialog("chrome://browser/content/preferences/permissions.xul",
+                        "_blank", "resizable,dialog=no,centerscreen", params);
+  },
+
+  dontShowMessage: function ()
+  {
+    var showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
+    gPrefService.setBoolPref("privacy.popups.showBrowserMessage", !showMessage);
+    gBrowser.getNotificationBox().removeCurrentNotification();
+  }
+};
+
+function gKeywordURIFixup({ target: browser, data: fixupInfo }) {
+  let deserializeURI = (spec) => spec ? makeURI(spec) : null;
+
+  // We get called irrespective of whether we did a keyword search, or
+  // whether the original input would be vaguely interpretable as a URL,
+  // so figure that out first.
+  let alternativeURI = deserializeURI(fixupInfo.fixedURI);
+  if (!fixupInfo.keywordProviderName  || !alternativeURI || !alternativeURI.host) {
+    return;
+  }
+
+  // At this point we're still only just about to load this URI.
+  // When the async DNS lookup comes back, we may be in any of these states:
+  // 1) still on the previous URI, waiting for the preferredURI (keyword
+  //    search) to respond;
+  // 2) at the keyword search URI (preferredURI)
+  // 3) at some other page because the user stopped navigation.
+  // We keep track of the currentURI to detect case (1) in the DNS lookup
+  // callback.
+  let previousURI = browser.currentURI;
+  let preferredURI = deserializeURI(fixupInfo.preferredURI);
+
+  // now swap for a weak ref so we don't hang on to browser needlessly
+  // even if the DNS query takes forever
+  let weakBrowser = Cu.getWeakReference(browser);
+  browser = null;
+
+  // Additionally, we need the host of the parsed url
+  let hostName = alternativeURI.host;
+  // and the ascii-only host for the pref:
+  let asciiHost = alternativeURI.asciiHost;
+  // Normalize out a single trailing dot - NB: not using endsWith/lastIndexOf
+  // because we need to be sure this last dot is the *only* dot, too.
+  // More generally, this is used for the pref and should stay in sync with
+  // the code in nsDefaultURIFixup::KeywordURIFixup .
+  if (asciiHost.indexOf('.') == asciiHost.length - 1) {
+    asciiHost = asciiHost.slice(0, -1);
+  }
+
+  let isIPv4Address = host => {
+    let parts = host.split(".");
+    if (parts.length != 4) {
+      return false;
+    }
+    return parts.every(part => {
+      let n = parseInt(part, 10);
+      return n >= 0 && n <= 255;
+    });
+  };
+  // Avoid showing fixup information if we're suggesting an IP. Note that
+  // decimal representations of IPs are normalized to a 'regular'
+  // dot-separated IP address by network code, but that only happens for
+  // numbers that don't overflow. Longer numbers do not get normalized,
+  // but still work to access IP addresses. So for instance,
+  // 1097347366913 (ff7f000001) gets resolved by using the final bytes,
+  // making it the same as 7f000001, which is 127.0.0.1 aka localhost.
+  // While 2130706433 would get normalized by network, 1097347366913
+  // does not, and we have to deal with both cases here:
+  if (isIPv4Address(asciiHost) || /^(?:\d+|0x[a-f0-9]+)$/i.test(asciiHost))
+    return;
+
+  let onLookupComplete = (request, record, status) => {
+    let browser = weakBrowser.get();
+    if (!Components.isSuccessCode(status) || !browser)
+      return;
+
+    let currentURI = browser.currentURI;
+    // If we're in case (3) (see above), don't show an info bar.
+    if (!currentURI.equals(previousURI) &&
+        !currentURI.equals(preferredURI)) {
+      return;
+    }
+
+    // show infobar offering to visit the host
+    let notificationBox = gBrowser.getNotificationBox(browser);
+    if (notificationBox.getNotificationWithValue("keyword-uri-fixup"))
+      return;
+
+    let message = gNavigatorBundle.getFormattedString(
+      "keywordURIFixup.message", [hostName]);
+    let yesMessage = gNavigatorBundle.getFormattedString(
+      "keywordURIFixup.goTo", [hostName])
+
+    let buttons = [
+      {
+        label: yesMessage,
+        accessKey: gNavigatorBundle.getString("keywordURIFixup.goTo.accesskey"),
+        callback: function() {
+          // Do not set this preference while in private browsing.
+          if (!PrivateBrowsingUtils.isWindowPrivate(window)) {
+            let pref = "browser.fixup.domainwhitelist." + asciiHost;
+            Services.prefs.setBoolPref(pref, true);
+          }
+          openUILinkIn(alternativeURI.spec, "current");
+        }
+      },
+      {
+        label: gNavigatorBundle.getString("keywordURIFixup.dismiss"),
+        accessKey: gNavigatorBundle.getString("keywordURIFixup.dismiss.accesskey"),
+        callback: function() {
+          let notification = notificationBox.getNotificationWithValue("keyword-uri-fixup");
+          notificationBox.removeNotification(notification, true);
+        }
+      }
+    ];
+    let notification =
+      notificationBox.appendNotification(message, "keyword-uri-fixup", null,
+                                         notificationBox.PRIORITY_INFO_HIGH,
+                                         buttons);
+    notification.persistence = 1;
+  };
+
+  try {
+    gDNSService.asyncResolve(hostName, 0, onLookupComplete, Services.tm.mainThread);
+  } catch (ex) {
+    // Do nothing if the URL is invalid (we don't want to show a notification in that case).
+    if (ex.result != Cr.NS_ERROR_UNKNOWN_HOST) {
+      // ... otherwise, report:
+      Cu.reportError(ex);
+    }
+  }
+}
+
+// A shared function used by both remote and non-remote browser XBL bindings to
+// load a URI or redirect it to the correct process.
+function _loadURIWithFlags(browser, uri, params) {
+  if (!uri) {
+    uri = "about:blank";
+  }
+  let flags = params.flags || 0;
+  let referrer = params.referrerURI;
+  let referrerPolicy = ('referrerPolicy' in params ? params.referrerPolicy :
+                        Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+  let postData = params.postData;
+
+  let wasRemote = browser.isRemoteBrowser;
+
+  let process = browser.isRemoteBrowser ? Ci.nsIXULRuntime.PROCESS_TYPE_CONTENT
+                                        : Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT;
+  let mustChangeProcess = gMultiProcessBrowser &&
+                          !E10SUtils.canLoadURIInProcess(uri, process);
+  if ((!wasRemote && !mustChangeProcess) ||
+      (wasRemote && mustChangeProcess)) {
+    browser.inLoadURI = true;
+  }
+  try {
+    if (!mustChangeProcess) {
+      if (params.userContextId) {
+        browser.webNavigation.setOriginAttributesBeforeLoading({ userContextId: params.userContextId });
+      }
+
+      browser.webNavigation.loadURIWithOptions(uri, flags,
+                                               referrer, referrerPolicy,
+                                               postData, null, null);
+    } else {
+      // Check if the current browser is allowed to unload.
+      let {permitUnload, timedOut} = browser.permitUnload();
+      if (!timedOut && !permitUnload) {
+        return;
+      }
+
+      if (postData) {
+        postData = NetUtil.readInputStreamToString(postData, postData.available());
+      }
+
+      let loadParams = {
+        uri: uri,
+        flags: flags,
+        referrer: referrer ? referrer.spec : null,
+        referrerPolicy: referrerPolicy,
+        postData: postData
+      }
+
+      if (params.userContextId) {
+        loadParams.userContextId = params.userContextId;
+      }
+
+      LoadInOtherProcess(browser, loadParams);
+    }
+  } catch (e) {
+    // If anything goes wrong when switching remoteness, just switch remoteness
+    // manually and load the URI.
+    // We might lose history that way but at least the browser loaded a page.
+    // This might be necessary if SessionStore wasn't initialized yet i.e.
+    // when the homepage is a non-remote page.
+    if (mustChangeProcess) {
+      Cu.reportError(e);
+      gBrowser.updateBrowserRemotenessByURL(browser, uri);
+
+      if (params.userContextId) {
+        browser.webNavigation.setOriginAttributesBeforeLoading({ userContextId: params.userContextId });
+      }
+
+      browser.webNavigation.loadURIWithOptions(uri, flags, referrer, referrerPolicy,
+                                               postData, null, null);
+    } else {
+      throw e;
+    }
+  } finally {
+    if ((!wasRemote && !mustChangeProcess) ||
+        (wasRemote && mustChangeProcess)) {
+      browser.inLoadURI = false;
+    }
+  }
+}
+
+// Starts a new load in the browser first switching the browser to the correct
+// process
+function LoadInOtherProcess(browser, loadOptions, historyIndex = -1) {
+  let tab = gBrowser.getTabForBrowser(browser);
+  SessionStore.navigateAndRestore(tab, loadOptions, historyIndex);
+}
+
+// Called when a docshell has attempted to load a page in an incorrect process.
+// This function is responsible for loading the page in the correct process.
+function RedirectLoad({ target: browser, data }) {
+  // We should only start the redirection if the browser window has finished
+  // starting up. Otherwise, we should wait until the startup is done.
+  if (gBrowserInit.delayedStartupFinished) {
+    LoadInOtherProcess(browser, data.loadOptions, data.historyIndex);
+  } else {
+    let delayedStartupFinished = (subject, topic) => {
+      if (topic == "browser-delayed-startup-finished" &&
+          subject == window) {
+        Services.obs.removeObserver(delayedStartupFinished, topic);
+        LoadInOtherProcess(browser, data.loadOptions, data.historyIndex);
+      }
+    };
+    Services.obs.addObserver(delayedStartupFinished,
+                             "browser-delayed-startup-finished",
+                             false);
+  }
+}
+
+addEventListener("DOMContentLoaded", function onDCL() {
+  removeEventListener("DOMContentLoaded", onDCL);
+
+  // There are some windows, like macBrowserOverlay.xul, that
+  // load browser.js, but never load tabbrowser.xml. We can ignore
+  // those cases.
+  if (!gBrowser || !gBrowser.updateBrowserRemoteness) {
+    return;
+  }
+
+  window.QueryInterface(Ci.nsIInterfaceRequestor)
+        .getInterface(nsIWebNavigation)
+        .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
+        .QueryInterface(Ci.nsIInterfaceRequestor)
+        .getInterface(Ci.nsIXULWindow)
+        .XULBrowserWindow = window.XULBrowserWindow;
+  window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow =
+    new nsBrowserAccess();
+
+  let initBrowser =
+    document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");
+
+  // The window's first argument is a tab if and only if we are swapping tabs.
+  // We must set the browser's usercontextid before updateBrowserRemoteness(),
+  // so that the newly created remote tab child has the correct usercontextid.
+  if (window.arguments) {
+    let tabToOpen = window.arguments[0];
+    if (tabToOpen instanceof XULElement && tabToOpen.hasAttribute("usercontextid")) {
+      initBrowser.setAttribute("usercontextid", tabToOpen.getAttribute("usercontextid"));
+    }
+  }
+
+  gBrowser.updateBrowserRemoteness(initBrowser, gMultiProcessBrowser);
+});
+
+var gBrowserInit = {
+  delayedStartupFinished: false,
+
+  onLoad: function() {
+    gBrowser.addEventListener("DOMUpdatePageReport", gPopupBlockerObserver, false);
+
+    Services.obs.addObserver(gPluginHandler.NPAPIPluginCrashed, "plugin-crashed", false);
+
+    window.addEventListener("AppCommand", HandleAppCommandEvent, true);
+
+    // These routines add message listeners. They must run before
+    // loading the frame script to ensure that we don't miss any
+    // message sent between when the frame script is loaded and when
+    // the listener is registered.
+    DOMLinkHandler.init();
+    gPageStyleMenu.init();
+    LanguageDetectionListener.init();
+    BrowserOnClick.init();
+    FeedHandler.init();
+    DevEdition.init();
+    AboutPrivateBrowsingListener.init();
+    TrackingProtection.init();
+    RefreshBlocker.init();
+    CaptivePortalWatcher.init();
+
+    let mm = window.getGroupMessageManager("browsers");
+    mm.loadFrameScript("chrome://browser/content/tab-content.js", true);
+    mm.loadFrameScript("chrome://browser/content/content.js", true);
+    mm.loadFrameScript("chrome://browser/content/content-UITour.js", true);
+    mm.loadFrameScript("chrome://global/content/manifestMessages.js", true);
+
+    // initialize observers and listeners
+    // and give C++ access to gBrowser
+    XULBrowserWindow.init();
+
+    window.messageManager.addMessageListener("Browser:LoadURI", RedirectLoad);
+
+    if (!gMultiProcessBrowser) {
+      // There is a Content:Click message manually sent from content.
+      Cc["@mozilla.org/eventlistenerservice;1"]
+        .getService(Ci.nsIEventListenerService)
+        .addSystemEventListener(gBrowser, "click", contentAreaClick, true);
+    }
+
+    // hook up UI through progress listener
+    gBrowser.addProgressListener(window.XULBrowserWindow);
+    gBrowser.addTabsProgressListener(window.TabsProgressListener);
+
+    // setup simple gestures support
+    gGestureSupport.init(true);
+
+    // setup history swipe animation
+    gHistorySwipeAnimation.init();
+
+    SidebarUI.init();
+
+    // Certain kinds of automigration rely on this notification to complete
+    // their tasks BEFORE the browser window is shown. SessionStore uses it to
+    // restore tabs into windows AFTER important parts like gMultiProcessBrowser
+    // have been initialized.
+    Services.obs.notifyObservers(window, "browser-window-before-show", "");
+
+    // Set a sane starting width/height for all resolutions on new profiles.
+    if (!document.documentElement.hasAttribute("width")) {
+      const TARGET_WIDTH = 1280;
+      const TARGET_HEIGHT = 1040;
+      let width = Math.min(screen.availWidth * .9, TARGET_WIDTH);
+      let height = Math.min(screen.availHeight * .9, TARGET_HEIGHT);
+
+      document.documentElement.setAttribute("width", width);
+      document.documentElement.setAttribute("height", height);
+
+      if (width < TARGET_WIDTH && height < TARGET_HEIGHT) {
+        document.documentElement.setAttribute("sizemode", "maximized");
+      }
+    }
+
+    if (!window.toolbar.visible) {
+      // adjust browser UI for popups
+      gURLBar.setAttribute("readonly", "true");
+      gURLBar.setAttribute("enablehistory", "false");
+    }
+
+    // Misc. inits.
+    TabletModeUpdater.init();
+    CombinedStopReload.init();
+    gPrivateBrowsingUI.init();
+
+    if (window.matchMedia("(-moz-os-version: windows-win8)").matches &&
+        window.matchMedia("(-moz-windows-default-theme)").matches) {
+      let windowFrameColor = new Color(...Cu.import("resource:///modules/Windows8WindowFrameColor.jsm", {})
+                                            .Windows8WindowFrameColor.get());
+      // Default to black for foreground text.
+      if (!windowFrameColor.isContrastRatioAcceptable(new Color(0, 0, 0))) {
+        document.documentElement.setAttribute("darkwindowframe", "true");
+      }
+    }
+
+    ToolbarIconColor.init();
+
+    // Wait until chrome is painted before executing code not critical to making the window visible
+    this._boundDelayedStartup = this._delayedStartup.bind(this);
+    window.addEventListener("MozAfterPaint", this._boundDelayedStartup);
+
+    this._loadHandled = true;
+  },
+
+  _cancelDelayedStartup: function () {
+    window.removeEventListener("MozAfterPaint", this._boundDelayedStartup);
+    this._boundDelayedStartup = null;
+  },
+
+  _delayedStartup: function() {
+    let tmp = {};
+    Cu.import("resource://gre/modules/TelemetryTimestamps.jsm", tmp);
+    let TelemetryTimestamps = tmp.TelemetryTimestamps;
+    TelemetryTimestamps.add("delayedStartupStarted");
+
+    this._cancelDelayedStartup();
+
+    // We need to set the OfflineApps message listeners up before we
+    // load homepages, which might need them.
+    OfflineApps.init();
+
+    // This pageshow listener needs to be registered before we may call
+    // swapBrowsersAndCloseOther() to receive pageshow events fired by that.
+    let mm = window.messageManager;
+    mm.addMessageListener("PageVisibility:Show", function(message) {
+      if (message.target == gBrowser.selectedBrowser) {
+        setTimeout(pageShowEventHandlers, 0, message.data.persisted);
+      }
+    });
+
+    gBrowser.addEventListener("AboutTabCrashedLoad", function(event) {
+      let ownerDoc = event.originalTarget;
+
+      if (!ownerDoc.documentURI.startsWith("about:tabcrashed")) {
+        return;
+      }
+
+      let browser = gBrowser.getBrowserForDocument(event.target);
+      // Reset the zoom for the tabcrashed page.
+      ZoomManager.setZoomForBrowser(browser, 1);
+    }, false, true);
+
+    gBrowser.addEventListener("InsecureLoginFormsStateChange", function() {
+      gIdentityHandler.refreshForInsecureLoginForms();
+    });
+
+    let uriToLoad = this._getUriToLoad();
+    if (uriToLoad && uriToLoad != "about:blank") {
+      if (uriToLoad instanceof Ci.nsIArray) {
+        let count = uriToLoad.length;
+        let specs = [];
+        for (let i = 0; i < count; i++) {
+          let urisstring = uriToLoad.queryElementAt(i, Ci.nsISupportsString);
+          specs.push(urisstring.data);
+        }
+
+        // This function throws for certain malformed URIs, so use exception handling
+        // so that we don't disrupt startup
+        try {
+          gBrowser.loadTabs(specs, false, true);
+        } catch (e) {}
+      }
+      else if (uriToLoad instanceof XULElement) {
+        // swap the given tab with the default about:blank tab and then close
+        // the original tab in the other window.
+        let tabToOpen = uriToLoad;
+
+        // If this tab was passed as a window argument, clear the
+        // reference to it from the arguments array.
+        if (window.arguments[0] == tabToOpen) {
+          window.arguments[0] = null;
+        }
+
+        // Stop the about:blank load
+        gBrowser.stop();
+        // make sure it has a docshell
+        gBrowser.docShell;
+
+        // We must set usercontextid before updateBrowserRemoteness()
+        // so that the newly created remote tab child has correct usercontextid
+        if (tabToOpen.hasAttribute("usercontextid")) {
+          let usercontextid = tabToOpen.getAttribute("usercontextid");
+          gBrowser.selectedBrowser.setAttribute("usercontextid", usercontextid);
+        }
+
+        // If the browser that we're swapping in was remote, then we'd better
+        // be able to support remote browsers, and then make our selectedTab
+        // remote.
+        try {
+          if (tabToOpen.linkedBrowser.isRemoteBrowser) {
+            if (!gMultiProcessBrowser) {
+              throw new Error("Cannot drag a remote browser into a window " +
+                              "without the remote tabs load context.");
+            }
+            gBrowser.updateBrowserRemoteness(gBrowser.selectedBrowser, true);
+          } else if (gBrowser.selectedBrowser.isRemoteBrowser) {
+            // If the browser is remote, then it's implied that
+            // gMultiProcessBrowser is true. We need to flip the remoteness
+            // of this tab to false in order for the tab drag to work.
+            gBrowser.updateBrowserRemoteness(gBrowser.selectedBrowser, false);
+          }
+          gBrowser.swapBrowsersAndCloseOther(gBrowser.selectedTab, tabToOpen);
+        } catch (e) {
+          Cu.reportError(e);
+        }
+      }
+      // window.arguments[2]: referrer (nsIURI | string)
+      //                 [3]: postData (nsIInputStream)
+      //                 [4]: allowThirdPartyFixup (bool)
+      //                 [5]: referrerPolicy (int)
+      //                 [6]: userContextId (int)
+      //                 [7]: originPrincipal (nsIPrincipal)
+      else if (window.arguments.length >= 3) {
+        let referrerURI = window.arguments[2];
+        if (typeof(referrerURI) == "string") {
+          try {
+            referrerURI = makeURI(referrerURI);
+          } catch (e) {
+            referrerURI = null;
+          }
+        }
+        let referrerPolicy = (window.arguments[5] != undefined ?
+            window.arguments[5] : Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT);
+        let userContextId = (window.arguments[6] != undefined ?
+            window.arguments[6] : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID);
+        loadURI(uriToLoad, referrerURI, window.arguments[3] || null,
+                window.arguments[4] || false, referrerPolicy, userContextId,
+                // pass the origin principal (if any) and force its use to create
+                // an initial about:blank viewer if present:
+                window.arguments[7], !!window.arguments[7]);
+        window.focus();
+      }
+      // Note: loadOneOrMoreURIs *must not* be called if window.arguments.length >= 3.
+      // Such callers expect that window.arguments[0] is handled as a single URI.
+      else {
+        loadOneOrMoreURIs(uriToLoad);
+      }
+    }
+
+    // Bug 778855 - Perf regression if we do this here. To be addressed in bug 779008.
+    setTimeout(function() { SafeBrowsing.init(); }, 2000);
+
+    Services.obs.addObserver(gIdentityHandler, "perm-changed", false);
+    Services.obs.addObserver(gSessionHistoryObserver, "browser:purge-session-history", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-disabled", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-started", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-blocked", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-origin-blocked", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-failed", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-confirmation", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-complete", false);
+    window.messageManager.addMessageListener("Browser:URIFixup", gKeywordURIFixup);
+
+    BrowserOffline.init();
+    IndexedDBPromptHelper.init();
+
+    if (AppConstants.E10S_TESTING_ONLY)
+      gRemoteTabsUI.init();
+
+    // Initialize the full zoom setting.
+    // We do this before the session restore service gets initialized so we can
+    // apply full zoom settings to tabs restored by the session restore service.
+    FullZoom.init();
+    PanelUI.init();
+    LightweightThemeListener.init();
+
+    Services.telemetry.getHistogramById("E10S_WINDOW").add(gMultiProcessBrowser);
+
+    SidebarUI.startDelayedLoad();
+
+    UpdateUrlbarSearchSplitterState();
+
+    if (!(isBlankPageURL(uriToLoad) || uriToLoad == "about:privatebrowsing") ||
+        !focusAndSelectUrlBar()) {
+      if (gBrowser.selectedBrowser.isRemoteBrowser) {
+        // If the initial browser is remote, in order to optimize for first paint,
+        // we'll defer switching focus to that browser until it has painted.
+        let focusedElement = document.commandDispatcher.focusedElement;
+        let mm = window.messageManager;
+        mm.addMessageListener("Browser:FirstPaint", function onFirstPaint() {
+          mm.removeMessageListener("Browser:FirstPaint", onFirstPaint);
+          // If focus didn't move while we were waiting for first paint, we're okay
+          // to move to the browser.
+          if (document.commandDispatcher.focusedElement == focusedElement) {
+            gBrowser.selectedBrowser.focus();
+          }
+        });
+      } else {
+        // If the initial browser is not remote, we can focus the browser
+        // immediately with no paint performance impact.
+        gBrowser.selectedBrowser.focus();
+      }
+    }
+
+    // Enable/Disable auto-hide tabbar
+    gBrowser.tabContainer.updateVisibility();
+
+    BookmarkingUI.init();
+    AutoShowBookmarksToolbar.init();
+
+    gPrefService.addObserver(gHomeButton.prefDomain, gHomeButton, false);
+
+    var homeButton = document.getElementById("home-button");
+    gHomeButton.updateTooltip(homeButton);
+
+    let safeMode = document.getElementById("helpSafeMode");
+    if (Services.appinfo.inSafeMode) {
+      safeMode.label = safeMode.getAttribute("stoplabel");
+      safeMode.accesskey = safeMode.getAttribute("stopaccesskey");
+    }
+
+    // BiDi UI
+    gBidiUI = isBidiEnabled();
+    if (gBidiUI) {
+      document.getElementById("documentDirection-separator").hidden = false;
+      document.getElementById("documentDirection-swap").hidden = false;
+      document.getElementById("textfieldDirection-separator").hidden = false;
+      document.getElementById("textfieldDirection-swap").hidden = false;
+    }
+
+    // Setup click-and-hold gestures access to the session history
+    // menus if global click-and-hold isn't turned on
+    if (!getBoolPref("ui.click_hold_context_menus", false))
+      SetClickAndHoldHandlers();
+
+    let NP = {};
+    Cu.import("resource:///modules/NetworkPrioritizer.jsm", NP);
+    NP.trackBrowserWindow(window);
+
+    PlacesToolbarHelper.init();
+
+    ctrlTab.readPref();
+    gPrefService.addObserver(ctrlTab.prefName, ctrlTab, false);
+
+    // Initialize the download manager some time after the app starts so that
+    // auto-resume downloads begin (such as after crashing or quitting with
+    // active downloads) and speeds up the first-load of the download manager UI.
+    // If the user manually opens the download manager before the timeout, the
+    // downloads will start right away, and initializing again won't hurt.
+    setTimeout(function() {
+      try {
+        Cu.import("resource:///modules/DownloadsCommon.jsm", {})
+          .DownloadsCommon.initializeAllDataLinks();
+        Cu.import("resource:///modules/DownloadsTaskbar.jsm", {})
+          .DownloadsTaskbar.registerIndicator(window);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+    }, 10000);
+
+    // Load the Login Manager data from disk off the main thread, some time
+    // after startup.  If the data is required before the timeout, for example
+    // because a restored page contains a password field, it will be loaded on
+    // the main thread, and this initialization request will be ignored.
+    setTimeout(function() {
+      try {
+        Services.logins;
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+    }, 3000);
+
+    // The object handling the downloads indicator is also initialized here in the
+    // delayed startup function, but the actual indicator element is not loaded
+    // unless there are downloads to be displayed.
+    DownloadsButton.initializeIndicator();
+
+    if (AppConstants.platform != "macosx") {
+      updateEditUIVisibility();
+      let placesContext = document.getElementById("placesContext");
+      placesContext.addEventListener("popupshowing", updateEditUIVisibility, false);
+      placesContext.addEventListener("popuphiding", updateEditUIVisibility, false);
+    }
+
+    LightWeightThemeWebInstaller.init();
+
+    if (Win7Features)
+      Win7Features.onOpenWindow();
+
+    PointerlockFsWarning.init();
+    FullScreen.init();
+    PointerLock.init();
+
+    // initialize the sync UI
+    gSyncUI.init();
+    gFxAccounts.init();
+
+    if (AppConstants.MOZ_DATA_REPORTING)
+      gDataNotificationInfoBar.init();
+
+    gBrowserThumbnails.init();
+
+    gMenuButtonBadgeManager.init();
+
+    gMenuButtonUpdateBadge.init();
+
+    window.addEventListener("mousemove", MousePosTracker, false);
+    window.addEventListener("dragover", MousePosTracker, false);
+
+    gNavToolbox.addEventListener("customizationstarting", CustomizationHandler);
+    gNavToolbox.addEventListener("customizationchange", CustomizationHandler);
+    gNavToolbox.addEventListener("customizationending", CustomizationHandler);
+
+    // End startup crash tracking after a delay to catch crashes while restoring
+    // tabs and to postpone saving the pref to disk.
+    try {
+      const startupCrashEndDelay = 30 * 1000;
+      setTimeout(Services.startup.trackStartupCrashEnd, startupCrashEndDelay);
+    } catch (ex) {
+      Cu.reportError("Could not end startup crash tracking: " + ex);
+    }
+
+    // Delay this a minute because there's no rush
+    setTimeout(() => {
+      this.gmpInstallManager = new GMPInstallManager();
+      // We don't really care about the results, if someone is interested they
+      // can check the log.
+      this.gmpInstallManager.simpleCheckAndInstall().then(null, () => {});
+    }, 1000 * 60);
+
+    // Report via telemetry whether we're able to play MP4/H.264/AAC video.
+    // We suspect that some Windows users have a broken or have not installed
+    // Windows Media Foundation, and we'd like to know how many. We'd also like
+    // to know how good our coverage is on other platforms.
+    // Note: we delay by 90 seconds reporting this, as calling canPlayType()
+    // on Windows will cause DLLs to load, i.e. cause disk I/O.
+    setTimeout(() => {
+      let v = document.createElementNS("http://www.w3.org/1999/xhtml", "video");
+      let aacWorks = v.canPlayType("audio/mp4") != "";
+      Services.telemetry.getHistogramById("VIDEO_CAN_CREATE_AAC_DECODER").add(aacWorks);
+      let h264Works = v.canPlayType("video/mp4") != "";
+      Services.telemetry.getHistogramById("VIDEO_CAN_CREATE_H264_DECODER").add(h264Works);
+    }, 90 * 1000);
+
+    SessionStore.promiseInitialized.then(() => {
+      // Bail out if the window has been closed in the meantime.
+      if (window.closed) {
+        return;
+      }
+
+      // Enable the Restore Last Session command if needed
+      RestoreLastSessionObserver.init();
+
+      SocialUI.init();
+
+      // Start monitoring slow add-ons
+      AddonWatcher.init();
+
+      // Telemetry for master-password - we do this after 5 seconds as it
+      // can cause IO if NSS/PSM has not already initialized.
+      setTimeout(() => {
+        if (window.closed) {
+          return;
+        }
+        let secmodDB = Cc["@mozilla.org/security/pkcs11moduledb;1"]
+                       .getService(Ci.nsIPKCS11ModuleDB);
+        let slot = secmodDB.findSlotByName("");
+        let mpEnabled = slot &&
+                        slot.status != Ci.nsIPKCS11Slot.SLOT_UNINITIALIZED &&
+                        slot.status != Ci.nsIPKCS11Slot.SLOT_READY;
+        if (mpEnabled) {
+          Services.telemetry.getHistogramById("MASTER_PASSWORD_ENABLED").add(mpEnabled);
+        }
+      }, 5000);
+
+      PanicButtonNotifier.init();
+    });
+
+    gBrowser.tabContainer.addEventListener("TabSelect", function() {
+      for (let panel of document.querySelectorAll("panel[tabspecific='true']")) {
+        if (panel.state == "open") {
+          panel.hidePopup();
+        }
+      }
+    });
+
+    this.delayedStartupFinished = true;
+
+    Services.obs.notifyObservers(window, "browser-delayed-startup-finished", "");
+    TelemetryTimestamps.add("delayedStartupFinished");
+  },
+
+  // Returns the URI(s) to load at startup.
+  _getUriToLoad: function () {
+    // window.arguments[0]: URI to load (string), or an nsIArray of
+    //                      nsISupportsStrings to load, or a xul:tab of
+    //                      a tabbrowser, which will be replaced by this
+    //                      window (for this case, all other arguments are
+    //                      ignored).
+    if (!window.arguments || !window.arguments[0])
+      return null;
+
+    let uri = window.arguments[0];
+    let sessionStartup = Cc["@mozilla.org/browser/sessionstartup;1"]
+                           .getService(Ci.nsISessionStartup);
+    let defaultArgs = Cc["@mozilla.org/browser/clh;1"]
+                        .getService(Ci.nsIBrowserHandler)
+                        .defaultArgs;
+
+    // If the given URI matches defaultArgs (the default homepage) we want
+    // to block its load if we're going to restore a session anyway.
+    if (uri == defaultArgs && sessionStartup.willOverrideHomepage)
+      return null;
+
+    return uri;
+  },
+
+  onUnload: function() {
+    // In certain scenarios it's possible for unload to be fired before onload,
+    // (e.g. if the window is being closed after browser.js loads but before the
+    // load completes). In that case, there's nothing to do here.
+    if (!this._loadHandled)
+      return;
+
+    // First clean up services initialized in gBrowserInit.onLoad (or those whose
+    // uninit methods don't depend on the services having been initialized).
+
+    CombinedStopReload.uninit();
+
+    gGestureSupport.init(false);
+
+    gHistorySwipeAnimation.uninit();
+
+    FullScreen.uninit();
+
+    gFxAccounts.uninit();
+
+    Services.obs.removeObserver(gPluginHandler.NPAPIPluginCrashed, "plugin-crashed");
+
+    try {
+      gBrowser.removeProgressListener(window.XULBrowserWindow);
+      gBrowser.removeTabsProgressListener(window.TabsProgressListener);
+    } catch (ex) {
+    }
+
+    PlacesToolbarHelper.uninit();
+
+    BookmarkingUI.uninit();
+
+    TabsInTitlebar.uninit();
+
+    ToolbarIconColor.uninit();
+
+    TabletModeUpdater.uninit();
+
+    gTabletModePageCounter.finish();
+
+    BrowserOnClick.uninit();
+
+    FeedHandler.uninit();
+
+    DevEdition.uninit();
+
+    TrackingProtection.uninit();
+
+    RefreshBlocker.uninit();
+
+    CaptivePortalWatcher.uninit();
+
+    gMenuButtonUpdateBadge.uninit();
+
+    gMenuButtonBadgeManager.uninit();
+
+    SidebarUI.uninit();
+
+    // Now either cancel delayedStartup, or clean up the services initialized from
+    // it.
+    if (this._boundDelayedStartup) {
+      this._cancelDelayedStartup();
+    } else {
+      if (Win7Features)
+        Win7Features.onCloseWindow();
+
+      gPrefService.removeObserver(ctrlTab.prefName, ctrlTab);
+      ctrlTab.uninit();
+      SocialUI.uninit();
+      gBrowserThumbnails.uninit();
+      FullZoom.destroy();
+
+      Services.obs.removeObserver(gIdentityHandler, "perm-changed");
+      Services.obs.removeObserver(gSessionHistoryObserver, "browser:purge-session-history");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-disabled");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-started");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-blocked");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-origin-blocked");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-failed");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-confirmation");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-complete");
+      window.messageManager.removeMessageListener("Browser:URIFixup", gKeywordURIFixup);
+      window.messageManager.removeMessageListener("Browser:LoadURI", RedirectLoad);
+
+      try {
+        gPrefService.removeObserver(gHomeButton.prefDomain, gHomeButton);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+
+      if (this.gmpInstallManager) {
+        this.gmpInstallManager.uninit();
+      }
+
+      BrowserOffline.uninit();
+      IndexedDBPromptHelper.uninit();
+      LightweightThemeListener.uninit();
+      PanelUI.uninit();
+      AutoShowBookmarksToolbar.uninit();
+    }
+
+    // Final window teardown, do this last.
+    window.XULBrowserWindow = null;
+    window.QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(Ci.nsIWebNavigation)
+          .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
+          .QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(Ci.nsIXULWindow)
+          .XULBrowserWindow = null;
+    window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow = null;
+  },
+};
+
+if (AppConstants.platform == "macosx") {
+  // nonBrowserWindowStartup(), nonBrowserWindowDelayedStartup(), and
+  // nonBrowserWindowShutdown() are used for non-browser windows in
+  // macBrowserOverlay
+  gBrowserInit.nonBrowserWindowStartup = function() {
+    // Disable inappropriate commands / submenus
+    var disabledItems = ['Browser:SavePage',
+                         'Browser:SendLink', 'cmd_pageSetup', 'cmd_print', 'cmd_find', 'cmd_findAgain',
+                         'viewToolbarsMenu', 'viewSidebarMenuMenu', 'Browser:Reload',
+                         'viewFullZoomMenu', 'pageStyleMenu', 'charsetMenu', 'View:PageSource', 'View:FullScreen',
+                         'viewHistorySidebar', 'Browser:AddBookmarkAs', 'Browser:BookmarkAllTabs',
+                         'View:PageInfo'];
+    var element;
+
+    for (let disabledItem of disabledItems) {
+      element = document.getElementById(disabledItem);
+      if (element)
+        element.setAttribute("disabled", "true");
+    }
+
+    // If no windows are active (i.e. we're the hidden window), disable the close, minimize
+    // and zoom menu commands as well
+    if (window.location.href == "chrome://browser/content/hiddenWindow.xul") {
+      var hiddenWindowDisabledItems = ['cmd_close', 'minimizeWindow', 'zoomWindow'];
+      for (let hiddenWindowDisabledItem of hiddenWindowDisabledItems) {
+        element = document.getElementById(hiddenWindowDisabledItem);
+        if (element)
+          element.setAttribute("disabled", "true");
+      }
+
+      // also hide the window-list separator
+      element = document.getElementById("sep-window-list");
+      element.setAttribute("hidden", "true");
+
+      // Setup the dock menu.
+      let dockMenuElement = document.getElementById("menu_mac_dockmenu");
+      if (dockMenuElement != null) {
+        let nativeMenu = Cc["@mozilla.org/widget/standalonenativemenu;1"]
+                         .createInstance(Ci.nsIStandaloneNativeMenu);
+
+        try {
+          nativeMenu.init(dockMenuElement);
+
+          let dockSupport = Cc["@mozilla.org/widget/macdocksupport;1"]
+                            .getService(Ci.nsIMacDockSupport);
+          dockSupport.dockMenu = nativeMenu;
+        }
+        catch (e) {
+        }
+      }
+    }
+
+    if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      document.getElementById("macDockMenuNewWindow").hidden = true;
+    }
+
+    this._delayedStartupTimeoutId = setTimeout(this.nonBrowserWindowDelayedStartup.bind(this), 0);
+  };
+
+  gBrowserInit.nonBrowserWindowDelayedStartup = function() {
+    this._delayedStartupTimeoutId = null;
+
+    // initialise the offline listener
+    BrowserOffline.init();
+
+    // initialize the private browsing UI
+    gPrivateBrowsingUI.init();
+
+    // initialize the sync UI
+    gSyncUI.init();
+
+    if (AppConstants.E10S_TESTING_ONLY) {
+      gRemoteTabsUI.init();
+    }
+  };
+
+  gBrowserInit.nonBrowserWindowShutdown = function() {
+    let dockSupport = Cc["@mozilla.org/widget/macdocksupport;1"]
+                      .getService(Ci.nsIMacDockSupport);
+    dockSupport.dockMenu = null;
+
+    // If nonBrowserWindowDelayedStartup hasn't run yet, we have no work to do -
+    // just cancel the pending timeout and return;
+    if (this._delayedStartupTimeoutId) {
+      clearTimeout(this._delayedStartupTimeoutId);
+      return;
+    }
+
+    BrowserOffline.uninit();
+  };
+}
+
+
+/* Legacy global init functions */
+var BrowserStartup        = gBrowserInit.onLoad.bind(gBrowserInit);
+var BrowserShutdown       = gBrowserInit.onUnload.bind(gBrowserInit);
+
+if (AppConstants.platform == "macosx") {
+  var nonBrowserWindowStartup        = gBrowserInit.nonBrowserWindowStartup.bind(gBrowserInit);
+  var nonBrowserWindowDelayedStartup = gBrowserInit.nonBrowserWindowDelayedStartup.bind(gBrowserInit);
+  var nonBrowserWindowShutdown       = gBrowserInit.nonBrowserWindowShutdown.bind(gBrowserInit);
+}
+
+function HandleAppCommandEvent(evt) {
+  switch (evt.command) {
+  case "Back":
+    BrowserBack();
+    break;
+  case "Forward":
+    BrowserForward();
+    break;
+  case "Reload":
+    BrowserReloadSkipCache();
+    break;
+  case "Stop":
+    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
+      BrowserStop();
+    break;
+  case "Search":
+    BrowserSearch.webSearch();
+    break;
+  case "Bookmarks":
+    SidebarUI.toggle("viewBookmarksSidebar");
+    break;
+  case "Home":
+    BrowserHome();
+    break;
+  case "New":
+    BrowserOpenTab();
+    break;
+  case "Close":
+    BrowserCloseTabOrWindow();
+    break;
+  case "Find":
+    gFindBar.onFindCommand();
+    break;
+  case "Help":
+    openHelpLink('firefox-help');
+    break;
+  case "Open":
+    BrowserOpenFileWindow();
+    break;
+  case "Print":
+    PrintUtils.printWindow(gBrowser.selectedBrowser.outerWindowID,
+                           gBrowser.selectedBrowser);
+    break;
+  case "Save":
+    saveBrowser(gBrowser.selectedBrowser);
+    break;
+  case "SendMail":
+    MailIntegration.sendLinkForBrowser(gBrowser.selectedBrowser);
+    break;
+  default:
+    return;
+  }
+  evt.stopPropagation();
+  evt.preventDefault();
+}
+
+function gotoHistoryIndex(aEvent) {
+  let index = aEvent.target.getAttribute("index");
+  if (!index)
+    return false;
+
+  let where = whereToOpenLink(aEvent);
+
+  if (where == "current") {
+    // Normal click. Go there in the current tab and update session history.
+
+    try {
+      gBrowser.gotoIndex(index);
+    }
+    catch (ex) {
+      return false;
+    }
+    return true;
+  }
+  // Modified click. Go there in a new tab/window.
+
+  let historyindex = aEvent.target.getAttribute("historyindex");
+  duplicateTabIn(gBrowser.selectedTab, where, Number(historyindex));
+  return true;
+}
+
+function BrowserForward(aEvent) {
+  let where = whereToOpenLink(aEvent, false, true);
+
+  if (where == "current") {
+    try {
+      gBrowser.goForward();
+    }
+    catch (ex) {
+    }
+  }
+  else {
+    duplicateTabIn(gBrowser.selectedTab, where, 1);
+  }
+}
+
+function BrowserBack(aEvent) {
+  let where = whereToOpenLink(aEvent, false, true);
+
+  if (where == "current") {
+    try {
+      gBrowser.goBack();
+    }
+    catch (ex) {
+    }
+  }
+  else {
+    duplicateTabIn(gBrowser.selectedTab, where, -1);
+  }
+}
+
+function BrowserHandleBackspace()
+{
+  switch (gPrefService.getIntPref("browser.backspace_action")) {
+  case 0:
+    BrowserBack();
+    break;
+  case 1:
+    goDoCommand("cmd_scrollPageUp");
+    break;
+  }
+}
+
+function BrowserHandleShiftBackspace()
+{
+  switch (gPrefService.getIntPref("browser.backspace_action")) {
+  case 0:
+    BrowserForward();
+    break;
+  case 1:
+    goDoCommand("cmd_scrollPageDown");
+    break;
+  }
+}
+
+function BrowserStop() {
+  const stopFlags = nsIWebNavigation.STOP_ALL;
+  gBrowser.webNavigation.stop(stopFlags);
+}
+
+function BrowserReloadOrDuplicate(aEvent) {
+  let metaKeyPressed = AppConstants.platform == "macosx"
+                       ? aEvent.metaKey
+                       : aEvent.ctrlKey;
+  var backgroundTabModifier = aEvent.button == 1 || metaKeyPressed;
+
+  if (aEvent.shiftKey && !backgroundTabModifier) {
+    BrowserReloadSkipCache();
+    return;
+  }
+
+  let where = whereToOpenLink(aEvent, false, true);
+  if (where == "current")
+    BrowserReload();
+  else
+    duplicateTabIn(gBrowser.selectedTab, where);
+}
+
+function BrowserReload() {
+  if (gBrowser.currentURI.schemeIs("view-source")) {
+    // Bug 1167797: For view source, we always skip the cache
+    return BrowserReloadSkipCache();
+  }
+  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_NONE;
+  BrowserReloadWithFlags(reloadFlags);
+}
+
+function BrowserReloadSkipCache() {
+  // Bypass proxy and cache.
+  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY | nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE;
+  BrowserReloadWithFlags(reloadFlags);
+}
+
+var BrowserHome = BrowserGoHome;
+function BrowserGoHome(aEvent) {
+  if (aEvent && "button" in aEvent &&
+      aEvent.button == 2) // right-click: do nothing
+    return;
+
+  var homePage = gHomeButton.getHomePage();
+  var where = whereToOpenLink(aEvent, false, true);
+  var urls;
+
+  // Home page should open in a new tab when current tab is an app tab
+  if (where == "current" &&
+      gBrowser &&
+      gBrowser.selectedTab.pinned)
+    where = "tab";
+
+  // openUILinkIn in utilityOverlay.js doesn't handle loading multiple pages
+  switch (where) {
+  case "current":
+    loadOneOrMoreURIs(homePage);
+    break;
+  case "tabshifted":
+  case "tab":
+    urls = homePage.split("|");
+    var loadInBackground = getBoolPref("browser.tabs.loadBookmarksInBackground", false);
+    gBrowser.loadTabs(urls, loadInBackground);
+    break;
+  case "window":
+    OpenBrowserWindow();
+    break;
+  }
+}
+
+function loadOneOrMoreURIs(aURIString)
+{
+  // we're not a browser window, pass the URI string to a new browser window
+  if (window.location.href != getBrowserURL())
+  {
+    window.openDialog(getBrowserURL(), "_blank", "all,dialog=no", aURIString);
+    return;
+  }
+
+  // This function throws for certain malformed URIs, so use exception handling
+  // so that we don't disrupt startup
+  try {
+    gBrowser.loadTabs(aURIString.split("|"), false, true);
+  }
+  catch (e) {
+  }
+}
+
+function focusAndSelectUrlBar() {
+  // In customize mode, the url bar is disabled. If a new tab is opened or the
+  // user switches to a different tab, this function gets called before we've
+  // finished leaving customize mode, and the url bar will still be disabled.
+  // We can't focus it when it's disabled, so we need to re-run ourselves when
+  // we've finished leaving customize mode.
+  if (CustomizationHandler.isExitingCustomizeMode) {
+    gNavToolbox.addEventListener("aftercustomization", function afterCustomize() {
+      gNavToolbox.removeEventListener("aftercustomization", afterCustomize);
+      focusAndSelectUrlBar();
+    });
+
+    return true;
+  }
+
+  if (gURLBar) {
+    if (window.fullScreen)
+      FullScreen.showNavToolbox();
+
+    gURLBar.select();
+    if (document.activeElement == gURLBar.inputField)
+      return true;
+  }
+  return false;
+}
+
+function openLocation() {
+  if (focusAndSelectUrlBar())
+    return;
+
+  if (window.location.href != getBrowserURL()) {
+    var win = getTopWin();
+    if (win) {
+      // If there's an open browser window, it should handle this command
+      win.focus()
+      win.openLocation();
+    }
+    else {
+      // If there are no open browser windows, open a new one
+      window.openDialog("chrome://browser/content/", "_blank",
+                        "chrome,all,dialog=no", BROWSER_NEW_TAB_URL);
+    }
+  }
+}
+
+function BrowserOpenTab(event) {
+  let where = "tab";
+  let relatedToCurrent = false;
+
+  if (event) {
+    where = whereToOpenLink(event, false, true);
+
+    switch (where) {
+      case "tab":
+      case "tabshifted":
+        // When accel-click or middle-click are used, open the new tab as
+        // related to the current tab.
+        relatedToCurrent = true;
+        break;
+      case "current":
+        where = "tab";
+        break;
+    }
+  }
+
+  openUILinkIn(BROWSER_NEW_TAB_URL, where, { relatedToCurrent });
+}
+
+/* Called from the openLocation dialog. This allows that dialog to instruct
+   its opener to open a new window and then step completely out of the way.
+   Anything less byzantine is causing horrible crashes, rather believably,
+   though oddly only on Linux. */
+function delayedOpenWindow(chrome, flags, href, postData)
+{
+  // The other way to use setTimeout,
+  // setTimeout(openDialog, 10, chrome, "_blank", flags, url),
+  // doesn't work here.  The extra "magic" extra argument setTimeout adds to
+  // the callback function would confuse gBrowserInit.onLoad() by making
+  // window.arguments[1] be an integer instead of null.
+  setTimeout(function() { openDialog(chrome, "_blank", flags, href, null, null, postData); }, 10);
+}
+
+/* Required because the tab needs time to set up its content viewers and get the load of
+   the URI kicked off before becoming the active content area. */
+function delayedOpenTab(aUrl, aReferrer, aCharset, aPostData, aAllowThirdPartyFixup)
+{
+  gBrowser.loadOneTab(aUrl, {
+                      referrerURI: aReferrer,
+                      charset: aCharset,
+                      postData: aPostData,
+                      inBackground: false,
+                      allowThirdPartyFixup: aAllowThirdPartyFixup});
+}
+
+var gLastOpenDirectory = {
+  _lastDir: null,
+  get path() {
+    if (!this._lastDir || !this._lastDir.exists()) {
+      try {
+        this._lastDir = gPrefService.getComplexValue("browser.open.lastDir",
+                                                     Ci.nsILocalFile);
+        if (!this._lastDir.exists())
+          this._lastDir = null;
+      }
+      catch (e) {}
+    }
+    return this._lastDir;
+  },
+  set path(val) {
+    try {
+      if (!val || !val.isDirectory())
+        return;
+    } catch (e) {
+      return;
+    }
+    this._lastDir = val.clone();
+
+    // Don't save the last open directory pref inside the Private Browsing mode
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      gPrefService.setComplexValue("browser.open.lastDir", Ci.nsILocalFile,
+                                   this._lastDir);
+  },
+  reset: function() {
+    this._lastDir = null;
+  }
+};
+
+function BrowserOpenFileWindow()
+{
+  // Get filepicker component.
+  try {
+    const nsIFilePicker = Ci.nsIFilePicker;
+    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
+    let fpCallback = function fpCallback_done(aResult) {
+      if (aResult == nsIFilePicker.returnOK) {
+        try {
+          if (fp.file) {
+            gLastOpenDirectory.path =
+              fp.file.parent.QueryInterface(Ci.nsILocalFile);
+          }
+        } catch (ex) {
+        }
+        openUILinkIn(fp.fileURL.spec, "current");
+      }
+    };
+
+    fp.init(window, gNavigatorBundle.getString("openFile"),
+            nsIFilePicker.modeOpen);
+    fp.appendFilters(nsIFilePicker.filterAll | nsIFilePicker.filterText |
+                     nsIFilePicker.filterImages | nsIFilePicker.filterXML |
+                     nsIFilePicker.filterHTML);
+    fp.displayDirectory = gLastOpenDirectory.path;
+    fp.open(fpCallback);
+  } catch (ex) {
+  }
+}
+
+function BrowserCloseTabOrWindow() {
+  // If we're not a browser window, just close the window
+  if (window.location.href != getBrowserURL()) {
+    closeWindow(true);
+    return;
+  }
+
+  // If the current tab is the last one, this will close the window.
+  gBrowser.removeCurrentTab({animate: true});
+}
+
+function BrowserTryToCloseWindow()
+{
+  if (WindowIsClosing())
+    window.close();     // WindowIsClosing does all the necessary checks
+}
+
+function loadURI(uri, referrer, postData, allowThirdPartyFixup, referrerPolicy,
+                 userContextId, originPrincipal, forceAboutBlankViewerInCurrent) {
+  try {
+    openLinkIn(uri, "current",
+               { referrerURI: referrer,
+                 referrerPolicy: referrerPolicy,
+                 postData: postData,
+                 allowThirdPartyFixup: allowThirdPartyFixup,
+                 userContextId: userContextId,
+                 originPrincipal,
+                 forceAboutBlankViewerInCurrent,
+               });
+  } catch (e) {}
+}
+
+/**
+ * Given a string, will generate a more appropriate urlbar value if a Places
+ * keyword or a search alias is found at the beginning of it.
+ *
+ * @param url
+ *        A string that may begin with a keyword or an alias.
+ *
+ * @return {Promise}
+ * @resolves { url, postData, mayInheritPrincipal }. If it's not possible
+ *           to discern a keyword or an alias, url will be the input string.
+ */
+function getShortcutOrURIAndPostData(url, callback = null) {
+  if (callback) {
+    Deprecated.warning("Please use the Promise returned by " +
+                       "getShortcutOrURIAndPostData() instead of passing a " +
+                       "callback",
+                       "https://bugzilla.mozilla.org/show_bug.cgi?id=1100294");
+  }
+  return Task.spawn(function* () {
+    let mayInheritPrincipal = false;
+    let postData = null;
+    // Split on the first whitespace.
+    let [keyword, param = ""] = url.trim().split(/\s(.+)/, 2);
+
+    if (!keyword) {
+      return { url, postData, mayInheritPrincipal };
+    }
+
+    let engine = Services.search.getEngineByAlias(keyword);
+    if (engine) {
+      let submission = engine.getSubmission(param, null, "keyword");
+      return { url: submission.uri.spec,
+               postData: submission.postData,
+               mayInheritPrincipal };
+    }
+
+    // A corrupt Places database could make this throw, breaking navigation
+    // from the location bar.
+    let entry = null;
+    try {
+      entry = yield PlacesUtils.keywords.fetch(keyword);
+    } catch (ex) {
+      Cu.reportError(`Unable to fetch Places keyword "${keyword}": ${ex}`);
+    }
+    if (!entry || !entry.url) {
+      // This is not a Places keyword.
+      return { url, postData, mayInheritPrincipal };
+    }
+
+    try {
+      [url, postData] =
+        yield BrowserUtils.parseUrlAndPostData(entry.url.href,
+                                               entry.postData,
+                                               param);
+      if (postData) {
+        postData = getPostDataStream(postData);
+      }
+
+      // Since this URL came from a bookmark, it's safe to let it inherit the
+      // current document's principal.
+      mayInheritPrincipal = true;
+    } catch (ex) {
+      // It was not possible to bind the param, just use the original url value.
+    }
+
+    return { url, postData, mayInheritPrincipal };
+  }).then(data => {
+    if (callback) {
+      callback(data);
+    }
+    return data;
+  });
+}
+
+function getPostDataStream(aPostDataString,
+                           aType = "application/x-www-form-urlencoded") {
+  let dataStream = Cc["@mozilla.org/io/string-input-stream;1"]
+                     .createInstance(Ci.nsIStringInputStream);
+  dataStream.data = aPostDataString;
+
+  let mimeStream = Cc["@mozilla.org/network/mime-input-stream;1"]
+                     .createInstance(Ci.nsIMIMEInputStream);
+  mimeStream.addHeader("Content-Type", aType);
+  mimeStream.addContentLength = true;
+  mimeStream.setData(dataStream);
+  return mimeStream.QueryInterface(Ci.nsIInputStream);
+}
+
+function getLoadContext() {
+  return window.QueryInterface(Ci.nsIInterfaceRequestor)
+               .getInterface(Ci.nsIWebNavigation)
+               .QueryInterface(Ci.nsILoadContext);
+}
+
+function readFromClipboard()
+{
+  var url;
+
+  try {
+    // Create transferable that will transfer the text.
+    var trans = Components.classes["@mozilla.org/widget/transferable;1"]
+                          .createInstance(Components.interfaces.nsITransferable);
+    trans.init(getLoadContext());
+
+    trans.addDataFlavor("text/unicode");
+
+    // If available, use selection clipboard, otherwise global one
+    if (Services.clipboard.supportsSelectionClipboard())
+      Services.clipboard.getData(trans, Services.clipboard.kSelectionClipboard);
+    else
+      Services.clipboard.getData(trans, Services.clipboard.kGlobalClipboard);
+
+    var data = {};
+    var dataLen = {};
+    trans.getTransferData("text/unicode", data, dataLen);
+
+    if (data) {
+      data = data.value.QueryInterface(Components.interfaces.nsISupportsString);
+      url = data.data.substring(0, dataLen.value / 2);
+    }
+  } catch (ex) {
+  }
+
+  return url;
+}
+
+/**
+ * Open the View Source dialog.
+ *
+ * @param aArgsOrDocument
+ *        Either an object or a Document. Passing a Document is deprecated,
+ *        and is not supported with e10s. This function will throw if
+ *        aArgsOrDocument is a CPOW.
+ *
+ *        If aArgsOrDocument is an object, that object can take the
+ *        following properties:
+ *
+ *        URL (required):
+ *          A string URL for the page we'd like to view the source of.
+ *        browser (optional):
+ *          The browser containing the document that we would like to view the
+ *          source of. This is required if outerWindowID is passed.
+ *        outerWindowID (optional):
+ *          The outerWindowID of the content window containing the document that
+ *          we want to view the source of. You only need to provide this if you
+ *          want to attempt to retrieve the document source from the network
+ *          cache.
+ *        lineNumber (optional):
+ *          The line number to focus on once the source is loaded.
+ */
+function BrowserViewSourceOfDocument(aArgsOrDocument) {
+  let args;
+
+  if (aArgsOrDocument instanceof Document) {
+    let doc = aArgsOrDocument;
+    // Deprecated API - callers should pass args object instead.
+    if (Cu.isCrossProcessWrapper(doc)) {
+      throw new Error("BrowserViewSourceOfDocument cannot accept a CPOW " +
+                      "as a document.");
+    }
+
+    let requestor = doc.defaultView
+                       .QueryInterface(Ci.nsIInterfaceRequestor);
+    let browser = requestor.getInterface(Ci.nsIWebNavigation)
+                           .QueryInterface(Ci.nsIDocShell)
+                           .chromeEventHandler;
+    let outerWindowID = requestor.getInterface(Ci.nsIDOMWindowUtils)
+                                 .outerWindowID;
+    let URL = browser.currentURI.spec;
+    args = { browser, outerWindowID, URL };
+  } else {
+    args = aArgsOrDocument;
+  }
+
+  let viewInternal = () => {
+    let inTab = Services.prefs.getBoolPref("view_source.tab");
+    if (inTab) {
+      let tabBrowser = gBrowser;
+      let forceNotRemote = false;
+      if (!tabBrowser) {
+        if (!args.browser) {
+          throw new Error("BrowserViewSourceOfDocument should be passed the " +
+                          "subject browser if called from a window without " +
+                          "gBrowser defined.");
+        }
+        forceNotRemote = !args.browser.isRemoteBrowser;
+      } else {
+        // Some internal URLs (such as specific chrome: and about: URLs that are
+        // not yet remote ready) cannot be loaded in a remote browser.  View
+        // source in tab expects the new view source browser's remoteness to match
+        // that of the original URL, so disable remoteness if necessary for this
+        // URL.
+        let contentProcess = Ci.nsIXULRuntime.PROCESS_TYPE_CONTENT
+        forceNotRemote =
+          gMultiProcessBrowser &&
+          !E10SUtils.canLoadURIInProcess(args.URL, contentProcess)
+      }
+
+      // In the case of popups, we need to find a non-popup browser window.
+      if (!tabBrowser || !window.toolbar.visible) {
+        // This returns only non-popup browser windows by default.
+        let browserWindow = RecentWindow.getMostRecentBrowserWindow();
+        tabBrowser = browserWindow.gBrowser;
+      }
+
+      // `viewSourceInBrowser` will load the source content from the page
+      // descriptor for the tab (when possible) or fallback to the network if
+      // that fails.  Either way, the view source module will manage the tab's
+      // location, so use "about:blank" here to avoid unnecessary redundant
+      // requests.
+      let tab = tabBrowser.loadOneTab("about:blank", {
+        relatedToCurrent: true,
+        inBackground: false,
+        forceNotRemote,
+        relatedBrowser: args.browser
+      });
+      args.viewSourceBrowser = tabBrowser.getBrowserForTab(tab);
+      top.gViewSourceUtils.viewSourceInBrowser(args);
+    } else {
+      top.gViewSourceUtils.viewSource(args);
+    }
+  }
+
+  // Check if external view source is enabled.  If so, try it.  If it fails,
+  // fallback to internal view source.
+  if (Services.prefs.getBoolPref("view_source.editor.external")) {
+    top.gViewSourceUtils
+       .openInExternalEditor(args, null, null, null, result => {
+      if (!result) {
+        viewInternal();
+      }
+    });
+  } else {
+    // Display using internal view source
+    viewInternal();
+  }
+}
+
+/**
+ * Opens the View Source dialog for the source loaded in the root
+ * top-level document of the browser. This is really just a
+ * convenience wrapper around BrowserViewSourceOfDocument.
+ *
+ * @param browser
+ *        The browser that we want to load the source of.
+ */
+function BrowserViewSource(browser) {
+  BrowserViewSourceOfDocument({
+    browser: browser,
+    outerWindowID: browser.outerWindowID,
+    URL: browser.currentURI.spec,
+  });
+}
+
+// documentURL - URL of the document to view, or null for this window's document
+// initialTab - name of the initial tab to display, or null for the first tab
+// imageElement - image to load in the Media Tab of the Page Info window; can be null/omitted
+// frameOuterWindowID - the id of the frame that the context menu opened in; can be null/omitted
+// browser - the browser containing the document we're interested in inspecting; can be null/omitted
+function BrowserPageInfo(documentURL, initialTab, imageElement, frameOuterWindowID, browser) {
+  if (documentURL instanceof HTMLDocument) {
+    Deprecated.warning("Please pass the location URL instead of the document " +
+                       "to BrowserPageInfo() as the first argument.",
+                       "https://bugzilla.mozilla.org/show_bug.cgi?id=1238180");
+    documentURL = documentURL.location;
+  }
+
+  let args = { initialTab, imageElement, frameOuterWindowID, browser };
+  var windows = Services.wm.getEnumerator("Browser:page-info");
+
+  documentURL = documentURL || window.gBrowser.selectedBrowser.currentURI.spec;
+
+  // Check for windows matching the url
+  while (windows.hasMoreElements()) {
+    var currentWindow = windows.getNext();
+    if (currentWindow.closed) {
+      continue;
+    }
+    if (currentWindow.document.documentElement.getAttribute("relatedUrl") == documentURL) {
+      currentWindow.focus();
+      currentWindow.resetPageInfo(args);
+      return currentWindow;
+    }
+  }
+
+  // We didn't find a matching window, so open a new one.
+  return openDialog("chrome://browser/content/pageinfo/pageInfo.xul", "",
+                    "chrome,toolbar,dialog=no,resizable", args);
+}
+
+function URLBarSetURI(aURI) {
+  var value = gBrowser.userTypedValue;
+  var valid = false;
+
+  if (value == null) {
+    let uri = aURI || gBrowser.currentURI;
+    // Strip off "wyciwyg://" and passwords for the location bar
+    try {
+      uri = Services.uriFixup.createExposableURI(uri);
+    } catch (e) {}
+
+    // Replace initial page URIs with an empty string
+    // 1. only if there's no opener (bug 370555).
+    // 2. if remote newtab is enabled and it's the default remote newtab page
+    let defaultRemoteURL = gAboutNewTabService.remoteEnabled &&
+                           uri.spec === gAboutNewTabService.newTabURL;
+    if ((gInitialPages.includes(uri.spec) || defaultRemoteURL) &&
+        checkEmptyPageOrigin(gBrowser.selectedBrowser, uri)) {
+      value = "";
+    } else {
+      // We should deal with losslessDecodeURI throwing for exotic URIs
+      try {
+        value = losslessDecodeURI(uri);
+      } catch (ex) {
+        value = "about:blank";
+      }
+    }
+
+    valid = !isBlankPageURL(uri.spec);
+  }
+
+  let isDifferentValidValue = valid && value != gURLBar.value;
+  gURLBar.value = value;
+  gURLBar.valueIsTyped = !valid;
+  if (isDifferentValidValue) {
+    gURLBar.selectionStart = gURLBar.selectionEnd = 0;
+  }
+
+  SetPageProxyState(valid ? "valid" : "invalid");
+}
+
+function losslessDecodeURI(aURI) {
+  let scheme = aURI.scheme;
+  if (scheme == "moz-action")
+    throw new Error("losslessDecodeURI should never get a moz-action URI");
+
+  var value = aURI.spec;
+
+  let decodeASCIIOnly = !["https", "http", "file", "ftp"].includes(scheme);
+  // Try to decode as UTF-8 if there's no encoding sequence that we would break.
+  if (!/%25(?:3B|2F|3F|3A|40|26|3D|2B|24|2C|23)/i.test(value)) {
+    if (decodeASCIIOnly) {
+      // This only decodes ascii characters (hex) 20-7e, except 25 (%).
+      // This avoids both cases stipulated below (%-related issues, and \r, \n
+      // and \t, which would be %0d, %0a and %09, respectively) as well as any
+      // non-US-ascii characters.
+      value = value.replace(/%(2[0-4]|2[6-9a-f]|[3-6][0-9a-f]|7[0-9a-e])/g, decodeURI);
+    } else {
+      try {
+        value = decodeURI(value)
+                  // 1. decodeURI decodes %25 to %, which creates unintended
+                  //    encoding sequences. Re-encode it, unless it's part of
+                  //    a sequence that survived decodeURI, i.e. one for:
+                  //    ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '#'
+                  //    (RFC 3987 section 3.2)
+                  // 2. Re-encode select whitespace so that it doesn't get eaten
+                  //    away by the location bar (bug 410726). Re-encode all
+                  //    adjacent whitespace, to prevent spoofing attempts where
+                  //    invisible characters would push part of the URL to
+                  //    overflow the location bar (bug 1395508).
+                  .replace(/%(?!3B|2F|3F|3A|40|26|3D|2B|24|2C|23)|[\r\n\t]|\s(?=\s)|\s$/ig,
+                           encodeURIComponent);
+      } catch (e) {}
+    }
+  }
+
+  // Encode invisible characters (C0/C1 control characters, U+007F [DEL],
+  // U+00A0 [no-break space], line and paragraph separator,
+  // object replacement character) (bug 452979, bug 909264)
+  value = value.replace(/[\u0000-\u001f\u007f-\u00a0\u2028\u2029\ufffc]/g,
+                        encodeURIComponent);
+
+  // Encode default ignorable characters (bug 546013)
+  // except ZWNJ (U+200C) and ZWJ (U+200D) (bug 582186).
+  // This includes all bidirectional formatting characters.
+  // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
+  value = value.replace(/[\u00ad\u034f\u061c\u115f-\u1160\u17b4-\u17b5\u180b-\u180d\u200b\u200e-\u200f\u202a-\u202e\u2060-\u206f\u3164\ufe00-\ufe0f\ufeff\uffa0\ufff0-\ufff8]|\ud834[\udd73-\udd7a]|[\udb40-\udb43][\udc00-\udfff]/g,
+                        encodeURIComponent);
+  return value;
+}
+
+function UpdateUrlbarSearchSplitterState()
+{
+  var splitter = document.getElementById("urlbar-search-splitter");
+  var urlbar = document.getElementById("urlbar-container");
+  var searchbar = document.getElementById("search-container");
+
+  if (document.documentElement.getAttribute("customizing") == "true") {
+    if (splitter) {
+      splitter.remove();
+    }
+    return;
+  }
+
+  // If the splitter is already in the right place, we don't need to do anything:
+  if (splitter &&
+      ((splitter.nextSibling == searchbar && splitter.previousSibling == urlbar) ||
+       (splitter.nextSibling == urlbar && splitter.previousSibling == searchbar))) {
+    return;
+  }
+
+  var ibefore = null;
+  if (urlbar && searchbar) {
+    if (urlbar.nextSibling == searchbar)
+      ibefore = searchbar;
+    else if (searchbar.nextSibling == urlbar)
+      ibefore = urlbar;
+  }
+
+  if (ibefore) {
+    if (!splitter) {
+      splitter = document.createElement("splitter");
+      splitter.id = "urlbar-search-splitter";
+      splitter.setAttribute("resizebefore", "flex");
+      splitter.setAttribute("resizeafter", "flex");
+      splitter.setAttribute("skipintoolbarset", "true");
+      splitter.setAttribute("overflows", "false");
+      splitter.className = "chromeclass-toolbar-additional";
+    }
+    urlbar.parentNode.insertBefore(splitter, ibefore);
+  } else if (splitter)
+    splitter.parentNode.removeChild(splitter);
+}
+
+function UpdatePageProxyState()
+{
+  if (gURLBar && gURLBar.value != gLastValidURLStr)
+    SetPageProxyState("invalid");
+}
+
+function SetPageProxyState(aState)
+{
+  if (!gURLBar)
+    return;
+
+  gURLBar.setAttribute("pageproxystate", aState);
+
+  // the page proxy state is set to valid via OnLocationChange, which
+  // gets called when we switch tabs.
+  if (aState == "valid") {
+    gLastValidURLStr = gURLBar.value;
+    gURLBar.addEventListener("input", UpdatePageProxyState, false);
+  } else if (aState == "invalid") {
+    gURLBar.removeEventListener("input", UpdatePageProxyState, false);
+  }
+}
+
+function PageProxyClickHandler(aEvent)
+{
+  if (aEvent.button == 1 && gPrefService.getBoolPref("middlemouse.paste"))
+    middleMousePaste(aEvent);
+}
+
+var gMenuButtonBadgeManager = {
+  BADGEID_APPUPDATE: "update",
+  BADGEID_DOWNLOAD: "download",
+  BADGEID_FXA: "fxa",
+
+  fxaBadge: null,
+  downloadBadge: null,
+  appUpdateBadge: null,
+
+  init: function () {
+    PanelUI.panel.addEventListener("popupshowing", this, true);
+  },
+
+  uninit: function () {
+    PanelUI.panel.removeEventListener("popupshowing", this, true);
+  },
+
+  handleEvent: function (e) {
+    if (e.type === "popupshowing") {
+      this.clearBadges();
+    }
+  },
+
+  _showBadge: function () {
+    let badgeToShow = this.downloadBadge || this.appUpdateBadge || this.fxaBadge;
+
+    if (badgeToShow) {
+      PanelUI.menuButton.setAttribute("badge-status", badgeToShow);
+    } else {
+      PanelUI.menuButton.removeAttribute("badge-status");
+    }
+  },
+
+  _changeBadge: function (badgeId, badgeStatus = null) {
+    if (badgeId == this.BADGEID_APPUPDATE) {
+      this.appUpdateBadge = badgeStatus;
+    } else if (badgeId == this.BADGEID_DOWNLOAD) {
+      this.downloadBadge = badgeStatus;
+    } else if (badgeId == this.BADGEID_FXA) {
+      this.fxaBadge = badgeStatus;
+    } else {
+      Cu.reportError("The badge ID '" + badgeId + "' is unknown!");
+    }
+    this._showBadge();
+  },
+
+  addBadge: function (badgeId, badgeStatus) {
+    if (!badgeStatus) {
+      Cu.reportError("badgeStatus must be defined");
+      return;
+    }
+    this._changeBadge(badgeId, badgeStatus);
+  },
+
+  removeBadge: function (badgeId) {
+    this._changeBadge(badgeId);
+  },
+
+  clearBadges: function () {
+    this.appUpdateBadge = null;
+    this.downloadBadge = null;
+    this.fxaBadge = null;
+    this._showBadge();
+  }
+};
+
+// Setup the hamburger button badges for updates, if enabled.
+var gMenuButtonUpdateBadge = {
+  enabled: false,
+  badgeWaitTime: 0,
+  timer: null,
+  cancelObserverRegistered: false,
+
+  init: function () {
+    try {
+      this.enabled = Services.prefs.getBoolPref("app.update.badge");
+    } catch (e) {}
+    if (this.enabled) {
+      try {
+        this.badgeWaitTime = Services.prefs.getIntPref("app.update.badgeWaitTime");
+      } catch (e) {
+        this.badgeWaitTime = 345600; // 4 days
+      }
+      Services.obs.addObserver(this, "update-staged", false);
+      Services.obs.addObserver(this, "update-downloaded", false);
+    }
+  },
+
+  uninit: function () {
+    if (this.timer)
+      this.timer.cancel();
+    if (this.enabled) {
+      Services.obs.removeObserver(this, "update-staged");
+      Services.obs.removeObserver(this, "update-downloaded");
+      this.enabled = false;
+    }
+    if (this.cancelObserverRegistered) {
+      Services.obs.removeObserver(this, "update-canceled");
+      this.cancelObserverRegistered = false;
+    }
+  },
+
+  onMenuPanelCommand: function(event) {
+    if (event.originalTarget.getAttribute("update-status") === "succeeded") {
+      // restart the app
+      let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
+                       .createInstance(Ci.nsISupportsPRBool);
+      Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+
+      if (!cancelQuit.data) {
+        Services.startup.quit(Services.startup.eAttemptQuit | Services.startup.eRestart);
+      }
+    } else {
+      // open the page for manual update
+      let url = Services.urlFormatter.formatURLPref("app.update.url.manual");
+      openUILinkIn(url, "tab");
+    }
+  },
+
+  observe: function (subject, topic, status) {
+    if (topic == "update-canceled") {
+      this.reset();
+      return;
+    }
+    if (status == "failed") {
+      // Background update has failed, let's show the UI responsible for
+      // prompting the user to update manually.
+      this.uninit();
+      this.displayBadge(false);
+      return;
+    }
+
+    // Give the user badgeWaitTime seconds to react before prompting.
+    this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+    this.timer.initWithCallback(this, this.badgeWaitTime * 1000,
+                                this.timer.TYPE_ONE_SHOT);
+    // The timer callback will call uninit() when it completes.
+  },
+
+  notify: function () {
+    // If the update is successfully applied, or if the updater has fallen back
+    // to non-staged updates, add a badge to the hamburger menu to indicate an
+    // update will be applied once the browser restarts.
+    this.uninit();
+    this.displayBadge(true);
+  },
+
+  displayBadge: function (succeeded) {
+    let status = succeeded ? "succeeded" : "failed";
+    let badgeStatus = "update-" + status;
+    gMenuButtonBadgeManager.addBadge(gMenuButtonBadgeManager.BADGEID_APPUPDATE, badgeStatus);
+
+    let stringId;
+    let updateButtonText;
+    if (succeeded) {
+      let brandBundle = document.getElementById("bundle_brand");
+      let brandShortName = brandBundle.getString("brandShortName");
+      stringId = "appmenu.restartNeeded.description";
+      updateButtonText = gNavigatorBundle.getFormattedString(stringId,
+                                                             [brandShortName]);
+      Services.obs.addObserver(this, "update-canceled", false);
+      this.cancelObserverRegistered = true;
+    } else {
+      stringId = "appmenu.updateFailed.description";
+      updateButtonText = gNavigatorBundle.getString(stringId);
+    }
+
+    let updateButton = document.getElementById("PanelUI-update-status");
+    updateButton.setAttribute("label", updateButtonText);
+    updateButton.setAttribute("update-status", status);
+    updateButton.hidden = false;
+  },
+
+  reset: function () {
+    gMenuButtonBadgeManager.removeBadge(
+      gMenuButtonBadgeManager.BADGEID_APPUPDATE);
+    let updateButton = document.getElementById("PanelUI-update-status");
+    updateButton.hidden = true;
+    this.uninit();
+    this.init();
+  }
+};
+
+// Values for telemtery bins: see TLS_ERROR_REPORT_UI in Histograms.json
+const TLS_ERROR_REPORT_TELEMETRY_AUTO_CHECKED   = 2;
+const TLS_ERROR_REPORT_TELEMETRY_AUTO_UNCHECKED = 3;
+const TLS_ERROR_REPORT_TELEMETRY_MANUAL_SEND    = 4;
+const TLS_ERROR_REPORT_TELEMETRY_AUTO_SEND      = 5;
+
+const PREF_SSL_IMPACT_ROOTS = ["security.tls.version.", "security.ssl3."];
+
+const PREF_SSL_IMPACT = PREF_SSL_IMPACT_ROOTS.reduce((prefs, root) => {
+  return prefs.concat(Services.prefs.getChildList(root));
+}, []);
+
+/**
+ * Handle command events bubbling up from error page content
+ * or from about:newtab or from remote error pages that invoke
+ * us via async messaging.
+ */
+var BrowserOnClick = {
+  init: function () {
+    let mm = window.messageManager;
+    mm.addMessageListener("Browser:CertExceptionError", this);
+    mm.addMessageListener("Browser:OpenCaptivePortalPage", this);
+    mm.addMessageListener("Browser:SiteBlockedError", this);
+    mm.addMessageListener("Browser:EnableOnlineMode", this);
+    mm.addMessageListener("Browser:SendSSLErrorReport", this);
+    mm.addMessageListener("Browser:SetSSLErrorReportAuto", this);
+    mm.addMessageListener("Browser:ResetSSLPreferences", this);
+    mm.addMessageListener("Browser:SSLErrorReportTelemetry", this);
+    mm.addMessageListener("Browser:OverrideWeakCrypto", this);
+    mm.addMessageListener("Browser:SSLErrorGoBack", this);
+
+    Services.obs.addObserver(this, "captive-portal-login-abort", false);
+    Services.obs.addObserver(this, "captive-portal-login-success", false);
+  },
+
+  uninit: function () {
+    let mm = window.messageManager;
+    mm.removeMessageListener("Browser:CertExceptionError", this);
+    mm.removeMessageListener("Browser:SiteBlockedError", this);
+    mm.removeMessageListener("Browser:EnableOnlineMode", this);
+    mm.removeMessageListener("Browser:SendSSLErrorReport", this);
+    mm.removeMessageListener("Browser:SetSSLErrorReportAuto", this);
+    mm.removeMessageListener("Browser:ResetSSLPreferences", this);
+    mm.removeMessageListener("Browser:SSLErrorReportTelemetry", this);
+    mm.removeMessageListener("Browser:OverrideWeakCrypto", this);
+    mm.removeMessageListener("Browser:SSLErrorGoBack", this);
+
+    Services.obs.removeObserver(this, "captive-portal-login-abort");
+    Services.obs.removeObserver(this, "captive-portal-login-success");
+  },
+
+  observe: function(aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "captive-portal-login-abort":
+      case "captive-portal-login-success":
+        // Broadcast when a captive portal is freed so that error pages
+        // can refresh themselves.
+        window.messageManager.broadcastAsyncMessage("Browser:CaptivePortalFreed");
+      break;
+    }
+  },
+
+  handleEvent: function (event) {
+    if (!event.isTrusted || // Don't trust synthetic events
+        event.button == 2) {
+      return;
+    }
+
+    let originalTarget = event.originalTarget;
+    let ownerDoc = originalTarget.ownerDocument;
+    if (!ownerDoc) {
+      return;
+    }
+
+    if (gMultiProcessBrowser &&
+        ownerDoc.documentURI.toLowerCase() == "about:newtab") {
+      this.onE10sAboutNewTab(event, ownerDoc);
+    }
+  },
+
+  receiveMessage: function (msg) {
+    switch (msg.name) {
+      case "Browser:CertExceptionError":
+        this.onCertError(msg.target, msg.data.elementId,
+                         msg.data.isTopFrame, msg.data.location,
+                         msg.data.securityInfoAsString);
+      break;
+      case "Browser:OpenCaptivePortalPage":
+        CaptivePortalWatcher.ensureCaptivePortalTab();
+      break;
+      case "Browser:SiteBlockedError":
+        this.onAboutBlocked(msg.data.elementId, msg.data.reason,
+                            msg.data.isTopFrame, msg.data.location);
+      break;
+      case "Browser:EnableOnlineMode":
+        if (Services.io.offline) {
+          // Reset network state and refresh the page.
+          Services.io.offline = false;
+          msg.target.reload();
+        }
+      break;
+      case "Browser:SendSSLErrorReport":
+        this.onSSLErrorReport(msg.target,
+                              msg.data.uri,
+                              msg.data.securityInfo);
+      break;
+      case "Browser:ResetSSLPreferences":
+        for (let prefName of PREF_SSL_IMPACT) {
+          Services.prefs.clearUserPref(prefName);
+        }
+        msg.target.reload();
+      break;
+      case "Browser:SetSSLErrorReportAuto":
+        Services.prefs.setBoolPref("security.ssl.errorReporting.automatic", msg.json.automatic);
+        let bin = TLS_ERROR_REPORT_TELEMETRY_AUTO_UNCHECKED;
+        if (msg.json.automatic) {
+          bin = TLS_ERROR_REPORT_TELEMETRY_AUTO_CHECKED;
+        }
+        Services.telemetry.getHistogramById("TLS_ERROR_REPORT_UI").add(bin);
+      break;
+      case "Browser:SSLErrorReportTelemetry":
+        let reportStatus = msg.data.reportStatus;
+        Services.telemetry.getHistogramById("TLS_ERROR_REPORT_UI")
+          .add(reportStatus);
+      break;
+      case "Browser:OverrideWeakCrypto":
+        let weakCryptoOverride = Cc["@mozilla.org/security/weakcryptooverride;1"]
+                                   .getService(Ci.nsIWeakCryptoOverride);
+        weakCryptoOverride.addWeakCryptoOverride(
+          msg.data.uri.host,
+          PrivateBrowsingUtils.isBrowserPrivate(gBrowser.selectedBrowser));
+      break;
+      case "Browser:SSLErrorGoBack":
+        goBackFromErrorPage();
+      break;
+    }
+  },
+
+  onSSLErrorReport: function(browser, uri, securityInfo) {
+    if (!Services.prefs.getBoolPref("security.ssl.errorReporting.enabled")) {
+      Cu.reportError("User requested certificate error report sending, but certificate error reporting is disabled");
+      return;
+    }
+
+    let serhelper = Cc["@mozilla.org/network/serialization-helper;1"]
+                           .getService(Ci.nsISerializationHelper);
+    let transportSecurityInfo = serhelper.deserializeObject(securityInfo);
+    transportSecurityInfo.QueryInterface(Ci.nsITransportSecurityInfo)
+
+    let errorReporter = Cc["@mozilla.org/securityreporter;1"]
+                          .getService(Ci.nsISecurityReporter);
+    errorReporter.reportTLSError(transportSecurityInfo,
+                                 uri.host, uri.port);
+  },
+
+  onCertError: function (browser, elementId, isTopFrame, location, securityInfoAsString) {
+    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
+    let securityInfo;
+
+    switch (elementId) {
+      case "exceptionDialogButton":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_CLICK_ADD_EXCEPTION);
+        }
+
+        securityInfo = getSecurityInfo(securityInfoAsString);
+        let sslStatus = securityInfo.QueryInterface(Ci.nsISSLStatusProvider)
+                                    .SSLStatus;
+        let params = { exceptionAdded : false,
+                       sslStatus : sslStatus };
+
+        try {
+          switch (Services.prefs.getIntPref("browser.ssl_override_behavior")) {
+            case 2 : // Pre-fetch & pre-populate
+              params.prefetchCert = true;
+            case 1 : // Pre-populate
+              params.location = location;
+          }
+        } catch (e) {
+          Components.utils.reportError("Couldn't get ssl_override pref: " + e);
+        }
+
+        window.openDialog('chrome://pippki/content/exceptionDialog.xul',
+                          '', 'chrome,centerscreen,modal', params);
+
+        // If the user added the exception cert, attempt to reload the page
+        if (params.exceptionAdded) {
+          browser.reload();
+        }
+        break;
+
+      case "returnButton":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_GET_ME_OUT_OF_HERE);
+        }
+        goBackFromErrorPage();
+        break;
+
+      case "advancedButton":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_UNDERSTAND_RISKS);
+        }
+
+        securityInfo = getSecurityInfo(securityInfoAsString);
+        let errorInfo = getDetailedCertErrorInfo(location,
+                                                 securityInfo);
+        browser.messageManager.sendAsyncMessage( "CertErrorDetails", {
+            code: securityInfo.errorCode,
+            info: errorInfo
+        });
+        break;
+
+      case "copyToClipboard":
+        const gClipboardHelper = Cc["@mozilla.org/widget/clipboardhelper;1"]
+                                    .getService(Ci.nsIClipboardHelper);
+        securityInfo = getSecurityInfo(securityInfoAsString);
+        let detailedInfo = getDetailedCertErrorInfo(location,
+                                                    securityInfo);
+        gClipboardHelper.copyString(detailedInfo);
+        break;
+
+    }
+  },
+
+  onAboutBlocked: function (elementId, reason, isTopFrame, location) {
+    // Depending on what page we are displaying here (malware/phishing/unwanted)
+    // use the right strings and links for each.
+    let bucketName = "";
+    let sendTelemetry = false;
+    if (reason === 'malware') {
+      sendTelemetry = true;
+      bucketName = "WARNING_MALWARE_PAGE_";
+    } else if (reason === 'phishing') {
+      sendTelemetry = true;
+      bucketName = "WARNING_PHISHING_PAGE_";
+    } else if (reason === 'unwanted') {
+      sendTelemetry = true;
+      bucketName = "WARNING_UNWANTED_PAGE_";
+    }
+    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
+    let nsISecTel = Ci.nsISecurityUITelemetry;
+    bucketName += isTopFrame ? "TOP_" : "FRAME_";
+    switch (elementId) {
+      case "getMeOutButton":
+        if (sendTelemetry) {
+          secHistogram.add(nsISecTel[bucketName + "GET_ME_OUT_OF_HERE"]);
+        }
+        getMeOutOfHere();
+        break;
+
+      case "reportButton":
+        // This is the "Why is this site blocked" button. We redirect
+        // to the generic page describing phishing/malware protection.
+
+        // We log even if malware/phishing/unwanted info URL couldn't be found:
+        // the measurement is for how many users clicked the WHY BLOCKED button
+        if (sendTelemetry) {
+          secHistogram.add(nsISecTel[bucketName + "WHY_BLOCKED"]);
+        }
+        openHelpLink("phishing-malware", false, "current");
+        break;
+
+      case "ignoreWarningButton":
+        if (gPrefService.getBoolPref("browser.safebrowsing.allowOverride")) {
+          if (sendTelemetry) {
+            secHistogram.add(nsISecTel[bucketName + "IGNORE_WARNING"]);
+          }
+          this.ignoreWarningButton(reason);
+        }
+        break;
+    }
+  },
+
+  /**
+   * This functions prevents navigation from happening directly through the <a>
+   * link in about:newtab (which is loaded in the parent and therefore would load
+   * the next page also in the parent) and instructs the browser to open the url
+   * in the current tab which will make it update the remoteness of the tab.
+   */
+  onE10sAboutNewTab: function(event, ownerDoc) {
+    let isTopFrame = (ownerDoc.defaultView.parent === ownerDoc.defaultView);
+    if (!isTopFrame) {
+      return;
+    }
+
+    let anchorTarget = event.originalTarget.parentNode;
+
+    if (anchorTarget instanceof HTMLAnchorElement &&
+        anchorTarget.classList.contains("newtab-link")) {
+      event.preventDefault();
+      let where = whereToOpenLink(event, false, false);
+      openLinkIn(anchorTarget.href, where, { charset: ownerDoc.characterSet, referrerURI: ownerDoc.documentURIObject });
+    }
+  },
+
+  ignoreWarningButton: function (reason) {
+    // Allow users to override and continue through to the site,
+    // but add a notify bar as a reminder, so that they don't lose
+    // track after, e.g., tab switching.
+    gBrowser.loadURIWithFlags(gBrowser.currentURI.spec,
+                              nsIWebNavigation.LOAD_FLAGS_BYPASS_CLASSIFIER,
+                              null, null, null);
+
+    Services.perms.add(gBrowser.currentURI, "safe-browsing",
+                       Ci.nsIPermissionManager.ALLOW_ACTION,
+                       Ci.nsIPermissionManager.EXPIRE_SESSION);
+
+    let buttons = [{
+      label: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.label"),
+      accessKey: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.accessKey"),
+      callback: function() { getMeOutOfHere(); }
+    }];
+
+    let title;
+    if (reason === 'malware') {
+      title = gNavigatorBundle.getString("safebrowsing.reportedAttackSite");
+      buttons[1] = {
+        label: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.label"),
+        accessKey: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.accessKey"),
+        callback: function() {
+          openUILinkIn(gSafeBrowsing.getReportURL('MalwareMistake'), 'tab');
+        }
+      };
+    } else if (reason === 'phishing') {
+      title = gNavigatorBundle.getString("safebrowsing.deceptiveSite");
+      buttons[1] = {
+        label: gNavigatorBundle.getString("safebrowsing.notADeceptiveSiteButton.label"),
+        accessKey: gNavigatorBundle.getString("safebrowsing.notADeceptiveSiteButton.accessKey"),
+        callback: function() {
+          openUILinkIn(gSafeBrowsing.getReportURL('PhishMistake'), 'tab');
+        }
+      };
+    } else if (reason === 'unwanted') {
+      title = gNavigatorBundle.getString("safebrowsing.reportedUnwantedSite");
+      // There is no button for reporting errors since Google doesn't currently
+      // provide a URL endpoint for these reports.
+    }
+
+    let notificationBox = gBrowser.getNotificationBox();
+    let value = "blocked-badware-page";
+
+    let previousNotification = notificationBox.getNotificationWithValue(value);
+    if (previousNotification) {
+      notificationBox.removeNotification(previousNotification);
+    }
+
+    let notification = notificationBox.appendNotification(
+      title,
+      value,
+      "chrome://global/skin/icons/blacklist_favicon.png",
+      notificationBox.PRIORITY_CRITICAL_HIGH,
+      buttons
+    );
+    // Persist the notification until the user removes so it
+    // doesn't get removed on redirects.
+    notification.persistence = -1;
+  },
+};
+
+/**
+ * Re-direct the browser to a known-safe page.  This function is
+ * used when, for example, the user browses to a known malware page
+ * and is presented with about:blocked.  The "Get me out of here!"
+ * button should take the user to the default start page so that even
+ * when their own homepage is infected, we can get them somewhere safe.
+ */
+function getMeOutOfHere() {
+  gBrowser.loadURI(getDefaultHomePage());
+}
+
+/**
+ * Re-direct the browser to the previous page or a known-safe page if no
+ * previous page is found in history.  This function is used when the user
+ * browses to a secure page with certificate issues and is presented with
+ * about:certerror.  The "Go Back" button should take the user to the previous
+ * or a default start page so that even when their own homepage is on a server
+ * that has certificate errors, we can get them somewhere safe.
+ */
+function goBackFromErrorPage() {
+  const ss = Cc["@mozilla.org/browser/sessionstore;1"].
+             getService(Ci.nsISessionStore);
+  let state = JSON.parse(ss.getTabState(gBrowser.selectedTab));
+  if (state.index == 1) {
+    // If the unsafe page is the first or the only one in history, go to the
+    // start page.
+    gBrowser.loadURI(getDefaultHomePage());
+  } else {
+    BrowserBack();
+  }
+}
+
+/**
+ * Return the default start page for the cases when the user's own homepage is
+ * infected, so we can get them somewhere safe.
+ */
+function getDefaultHomePage() {
+  // Get the start page from the *default* pref branch, not the user's
+  var prefs = Services.prefs.getDefaultBranch(null);
+  var url = BROWSER_NEW_TAB_URL;
+  try {
+    url = prefs.getComplexValue("browser.startup.homepage",
+                                Ci.nsIPrefLocalizedString).data;
+    // If url is a pipe-delimited set of pages, just take the first one.
+    if (url.includes("|"))
+      url = url.split("|")[0];
+  } catch (e) {
+    Components.utils.reportError("Couldn't get homepage pref: " + e);
+  }
+  return url;
+}
+
+function BrowserFullScreen()
+{
+  window.fullScreen = !window.fullScreen;
+}
+
+function mirrorShow(popup) {
+  let services = [];
+  if (Services.prefs.getBoolPref("browser.casting.enabled")) {
+    services = CastingApps.getServicesForMirroring();
+  }
+  popup.ownerDocument.getElementById("menu_mirrorTabCmd").hidden = !services.length;
+}
+
+function mirrorMenuItemClicked(event) {
+  gBrowser.selectedBrowser.messageManager.sendAsyncMessage("SecondScreen:tab-mirror",
+                                                           {service: event.originalTarget._service});
+}
+
+function populateMirrorTabMenu(popup) {
+  popup.innerHTML = null;
+  if (!Services.prefs.getBoolPref("browser.casting.enabled")) {
+    return;
+  }
+  let doc = popup.ownerDocument;
+  let services = CastingApps.getServicesForMirroring();
+  services.forEach(service => {
+    let item = doc.createElement("menuitem");
+    item.setAttribute("label", service.friendlyName);
+    item._service = service;
+    item.addEventListener("command", mirrorMenuItemClicked);
+    popup.appendChild(item);
+  });
+}
+
+function getWebNavigation()
+{
+  return gBrowser.webNavigation;
+}
+
+function BrowserReloadWithFlags(reloadFlags) {
+  let url = gBrowser.currentURI.spec;
+  if (gBrowser.updateBrowserRemotenessByURL(gBrowser.selectedBrowser, url)) {
+    // If the remoteness has changed, the new browser doesn't have any
+    // information of what was loaded before, so we need to load the previous
+    // URL again.
+    gBrowser.loadURIWithFlags(url, reloadFlags);
+    return;
+  }
+
+  let windowUtils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                          .getInterface(Ci.nsIDOMWindowUtils);
+
+  gBrowser.selectedBrowser
+          .messageManager
+          .sendAsyncMessage("Browser:Reload",
+                            { flags: reloadFlags,
+                              handlingUserInput: windowUtils.isHandlingUserInput });
+}
+
+function getSecurityInfo(securityInfoAsString) {
+  if (!securityInfoAsString)
+    return null;
+
+  const serhelper = Cc["@mozilla.org/network/serialization-helper;1"]
+                       .getService(Ci.nsISerializationHelper);
+  let securityInfo = serhelper.deserializeObject(securityInfoAsString);
+  securityInfo.QueryInterface(Ci.nsITransportSecurityInfo);
+
+  return securityInfo;
+}
+
+/**
+ * Returns a string with detailed information about the certificate validation
+ * failure from the specified URI that can be used to send a report.
+ */
+function getDetailedCertErrorInfo(location, securityInfo) {
+  if (!securityInfo)
+    return "";
+
+  let certErrorDetails = location;
+  let code = securityInfo.errorCode;
+  let errors = Cc["@mozilla.org/nss_errors_service;1"]
+                  .getService(Ci.nsINSSErrorsService);
+
+  certErrorDetails += "\r\n\r\n" + errors.getErrorMessage(errors.getXPCOMFromNSSError(code));
+
+  const sss = Cc["@mozilla.org/ssservice;1"]
+                 .getService(Ci.nsISiteSecurityService);
+  // SiteSecurityService uses different storage if the channel is
+  // private. Thus we must give isSecureHost correct flags or we
+  // might get incorrect results.
+  let flags = PrivateBrowsingUtils.isWindowPrivate(window) ?
+              Ci.nsISocketProvider.NO_PERMANENT_STORAGE : 0;
+
+  let uri = Services.io.newURI(location, null, null);
+
+  let hasHSTS = sss.isSecureHost(sss.HEADER_HSTS, uri.host, flags);
+  let hasHPKP = sss.isSecureHost(sss.HEADER_HPKP, uri.host, flags);
+  certErrorDetails += "\r\n\r\n" +
+                      gNavigatorBundle.getFormattedString("certErrorDetailsHSTS.label",
+                                                          [hasHSTS]);
+  certErrorDetails += "\r\n" +
+                      gNavigatorBundle.getFormattedString("certErrorDetailsKeyPinning.label",
+                                                          [hasHPKP]);
+
+  let certChain = "";
+  if (securityInfo.failedCertChain) {
+    let certs = securityInfo.failedCertChain.getEnumerator();
+    while (certs.hasMoreElements()) {
+      let cert = certs.getNext();
+      cert.QueryInterface(Ci.nsIX509Cert);
+      certChain += getPEMString(cert);
+    }
+  }
+
+  certErrorDetails += "\r\n\r\n" +
+                      gNavigatorBundle.getString("certErrorDetailsCertChain.label") +
+                      "\r\n\r\n" + certChain;
+
+  return certErrorDetails;
+}
+
+// TODO: can we pull getDERString and getPEMString in from pippki.js instead of
+// duplicating them here?
+function getDERString(cert)
+{
+  var length = {};
+  var derArray = cert.getRawDER(length);
+  var derString = '';
+  for (var i = 0; i < derArray.length; i++) {
+    derString += String.fromCharCode(derArray[i]);
+  }
+  return derString;
+}
+
+function getPEMString(cert)
+{
+  var derb64 = btoa(getDERString(cert));
+  // Wrap the Base64 string into lines of 64 characters,
+  // with CRLF line breaks (as specified in RFC 1421).
+  var wrapped = derb64.replace(/(\S{64}(?!$))/g, "$1\r\n");
+  return "-----BEGIN CERTIFICATE-----\r\n"
+         + wrapped
+         + "\r\n-----END CERTIFICATE-----\r\n";
+}
+
+var PrintPreviewListener = {
+  _printPreviewTab: null,
+  _tabBeforePrintPreview: null,
+  _simplifyPageTab: null,
+
+  getPrintPreviewBrowser: function () {
+    if (!this._printPreviewTab) {
+      let browser = gBrowser.selectedTab.linkedBrowser;
+      let forceNotRemote = gMultiProcessBrowser && !browser.isRemoteBrowser;
+      this._tabBeforePrintPreview = gBrowser.selectedTab;
+      this._printPreviewTab = gBrowser.loadOneTab("about:blank",
+                                                  { inBackground: false,
+                                                    forceNotRemote,
+                                                    relatedBrowser: browser });
+      gBrowser.selectedTab = this._printPreviewTab;
+    }
+    return gBrowser.getBrowserForTab(this._printPreviewTab);
+  },
+  createSimplifiedBrowser: function () {
+    this._simplifyPageTab = gBrowser.loadOneTab("about:blank",
+                                                { inBackground: true });
+    return this.getSimplifiedSourceBrowser();
+  },
+  getSourceBrowser: function () {
+    return this._tabBeforePrintPreview ?
+      this._tabBeforePrintPreview.linkedBrowser : gBrowser.selectedBrowser;
+  },
+  getSimplifiedSourceBrowser: function () {
+    return this._simplifyPageTab ?
+      gBrowser.getBrowserForTab(this._simplifyPageTab) : null;
+  },
+  getNavToolbox: function () {
+    return gNavToolbox;
+  },
+  onEnter: function () {
+    // We might have accidentally switched tabs since the user invoked print
+    // preview
+    if (gBrowser.selectedTab != this._printPreviewTab) {
+      gBrowser.selectedTab = this._printPreviewTab;
+    }
+    gInPrintPreviewMode = true;
+    this._toggleAffectedChrome();
+  },
+  onExit: function () {
+    gBrowser.selectedTab = this._tabBeforePrintPreview;
+    this._tabBeforePrintPreview = null;
+    gInPrintPreviewMode = false;
+    this._toggleAffectedChrome();
+    if (this._simplifyPageTab) {
+      gBrowser.removeTab(this._simplifyPageTab);
+      this._simplifyPageTab = null;
+    }
+    gBrowser.removeTab(this._printPreviewTab);
+    gBrowser.deactivatePrintPreviewBrowsers();
+    this._printPreviewTab = null;
+  },
+  _toggleAffectedChrome: function () {
+    gNavToolbox.collapsed = gInPrintPreviewMode;
+
+    if (gInPrintPreviewMode)
+      this._hideChrome();
+    else
+      this._showChrome();
+
+    TabsInTitlebar.allowedBy("print-preview", !gInPrintPreviewMode);
+  },
+  _hideChrome: function () {
+    this._chromeState = {};
+
+    this._chromeState.sidebarOpen = SidebarUI.isOpen;
+    this._sidebarCommand = SidebarUI.currentID;
+    SidebarUI.hide();
+
+    var notificationBox = gBrowser.getNotificationBox();
+    this._chromeState.notificationsOpen = !notificationBox.notificationsHidden;
+    notificationBox.notificationsHidden = true;
+
+    gBrowser.updateWindowResizers();
+
+    this._chromeState.findOpen = gFindBarInitialized && !gFindBar.hidden;
+    if (gFindBarInitialized)
+      gFindBar.close();
+
+    var globalNotificationBox = document.getElementById("global-notificationbox");
+    this._chromeState.globalNotificationsOpen = !globalNotificationBox.notificationsHidden;
+    globalNotificationBox.notificationsHidden = true;
+
+    this._chromeState.syncNotificationsOpen = false;
+    var syncNotifications = document.getElementById("sync-notifications");
+    if (syncNotifications) {
+      this._chromeState.syncNotificationsOpen = !syncNotifications.notificationsHidden;
+      syncNotifications.notificationsHidden = true;
+    }
+  },
+  _showChrome: function () {
+    if (this._chromeState.notificationsOpen)
+      gBrowser.getNotificationBox().notificationsHidden = false;
+
+    if (this._chromeState.findOpen)
+      gFindBar.open();
+
+    if (this._chromeState.globalNotificationsOpen)
+      document.getElementById("global-notificationbox").notificationsHidden = false;
+
+    if (this._chromeState.syncNotificationsOpen)
+      document.getElementById("sync-notifications").notificationsHidden = false;
+
+    if (this._chromeState.sidebarOpen)
+      SidebarUI.show(this._sidebarCommand);
+  },
+
+  activateBrowser(browser) {
+    gBrowser.activateBrowserForPrintPreview(browser);
+  },
+}
+
+function getMarkupDocumentViewer()
+{
+  return gBrowser.markupDocumentViewer;
+}
+
+// This function is obsolete. Newer code should use <tooltip page="true"/> instead.
+function FillInHTMLTooltip(tipElement)
+{
+  document.getElementById("aHTMLTooltip").fillInPageTooltip(tipElement);
+}
+
+var browserDragAndDrop = {
+  canDropLink: aEvent => Services.droppedLinkHandler.canDropLink(aEvent, true),
+
+  dragOver: function (aEvent)
+  {
+    if (this.canDropLink(aEvent)) {
+      aEvent.preventDefault();
+    }
+  },
+
+  dropLinks: function (aEvent, aDisallowInherit) {
+    return Services.droppedLinkHandler.dropLinks(aEvent, aDisallowInherit);
+  }
+};
+
+var homeButtonObserver = {
+  onDrop: function (aEvent)
+    {
+      // disallow setting home pages that inherit the principal
+      let links = browserDragAndDrop.dropLinks(aEvent, true);
+      if (links.length) {
+        setTimeout(openHomeDialog, 0, links.map(link => link.url).join("|"));
+      }
+    },
+
+  onDragOver: function (aEvent)
+    {
+      if (gPrefService.prefIsLocked("browser.startup.homepage")) {
+        return;
+      }
+      browserDragAndDrop.dragOver(aEvent);
+      aEvent.dropEffect = "link";
+    },
+  onDragExit: function (aEvent)
+    {
+    }
+}
+
+function openHomeDialog(aURL)
+{
+  var promptTitle = gNavigatorBundle.getString("droponhometitle");
+  var promptMsg;
+  if (aURL.includes("|")) {
+    promptMsg = gNavigatorBundle.getString("droponhomemsgMultiple");
+  } else {
+    promptMsg = gNavigatorBundle.getString("droponhomemsg");
+  }
+
+  var pressedVal  = Services.prompt.confirmEx(window, promptTitle, promptMsg,
+                          Services.prompt.STD_YES_NO_BUTTONS,
+                          null, null, null, null, {value:0});
+
+  if (pressedVal == 0) {
+    try {
+      var homepageStr = Components.classes["@mozilla.org/supports-string;1"]
+                        .createInstance(Components.interfaces.nsISupportsString);
+      homepageStr.data = aURL;
+      gPrefService.setComplexValue("browser.startup.homepage",
+                                   Components.interfaces.nsISupportsString, homepageStr);
+    } catch (ex) {
+      dump("Failed to set the home page.\n"+ex+"\n");
+    }
+  }
+}
+
+var newTabButtonObserver = {
+  onDragOver(aEvent) {
+    browserDragAndDrop.dragOver(aEvent);
+  },
+  onDragExit(aEvent) {},
+  onDrop: Task.async(function* (aEvent) {
+    let links = browserDragAndDrop.dropLinks(aEvent);
+    for (let link of links) {
+      if (link.url) {
+        let data = yield getShortcutOrURIAndPostData(link.url);
+        // Allow third-party services to fixup this URL.
+        openNewTabWith(data.url, null, data.postData, aEvent, true);
+      }
+    }
+  })
+}
+
+var newWindowButtonObserver = {
+  onDragOver(aEvent) {
+    browserDragAndDrop.dragOver(aEvent);
+  },
+  onDragExit(aEvent) {},
+  onDrop: Task.async(function* (aEvent) {
+    let links = browserDragAndDrop.dropLinks(aEvent);
+    for (let link of links) {
+      if (link.url) {
+        let data = yield getShortcutOrURIAndPostData(link.url);
+        // Allow third-party services to fixup this URL.
+        openNewWindowWith(data.url, null, data.postData, true);
+      }
+    }
+  })
+}
+
+const DOMLinkHandler = {
+  init: function() {
+    let mm = window.messageManager;
+    mm.addMessageListener("Link:AddFeed", this);
+    mm.addMessageListener("Link:SetIcon", this);
+    mm.addMessageListener("Link:AddSearch", this);
+  },
+
+  receiveMessage: function (aMsg) {
+    switch (aMsg.name) {
+      case "Link:AddFeed":
+        let link = {type: aMsg.data.type, href: aMsg.data.href, title: aMsg.data.title};
+        FeedHandler.addFeed(link, aMsg.target);
+        break;
+
+      case "Link:SetIcon":
+        this.setIcon(aMsg.target, aMsg.data.url, aMsg.data.loadingPrincipal);
+        break;
+
+      case "Link:AddSearch":
+        this.addSearch(aMsg.target, aMsg.data.engine, aMsg.data.url);
+        break;
+    }
+  },
+
+  setIcon: function(aBrowser, aURL, aLoadingPrincipal) {
+    if (gBrowser.isFailedIcon(aURL))
+      return false;
+
+    let tab = gBrowser.getTabForBrowser(aBrowser);
+    if (!tab)
+      return false;
+
+    gBrowser.setIcon(tab, aURL, aLoadingPrincipal);
+    return true;
+  },
+
+  addSearch: function(aBrowser, aEngine, aURL) {
+    let tab = gBrowser.getTabForBrowser(aBrowser);
+    if (!tab)
+      return;
+
+    BrowserSearch.addEngine(aBrowser, aEngine, makeURI(aURL));
+  },
+}
+
+const BrowserSearch = {
+  addEngine: function(browser, engine, uri) {
+    // Check to see whether we've already added an engine with this title
+    if (browser.engines) {
+      if (browser.engines.some(e => e.title == engine.title))
+        return;
+    }
+
+    var hidden = false;
+    // If this engine (identified by title) is already in the list, add it
+    // to the list of hidden engines rather than to the main list.
+    // XXX This will need to be changed when engines are identified by URL;
+    // see bug 335102.
+    if (Services.search.getEngineByName(engine.title))
+      hidden = true;
+
+    var engines = (hidden ? browser.hiddenEngines : browser.engines) || [];
+
+    engines.push({ uri: engine.href,
+                   title: engine.title,
+                   get icon() { return browser.mIconURL; }
+                 });
+
+    if (hidden)
+      browser.hiddenEngines = engines;
+    else {
+      browser.engines = engines;
+      if (browser == gBrowser.selectedBrowser)
+        this.updateOpenSearchBadge();
+    }
+  },
+
+  /**
+   * Update the browser UI to show whether or not additional engines are
+   * available when a page is loaded or the user switches tabs to a page that
+   * has search engines.
+   */
+  updateOpenSearchBadge: function() {
+    var searchBar = this.searchBar;
+    if (!searchBar)
+      return;
+
+    var engines = gBrowser.selectedBrowser.engines;
+    if (engines && engines.length > 0)
+      searchBar.setAttribute("addengines", "true");
+    else
+      searchBar.removeAttribute("addengines");
+  },
+
+  /**
+   * Gives focus to the search bar, if it is present on the toolbar, or loads
+   * the default engine's search form otherwise. For Mac, opens a new window
+   * or focuses an existing window, if necessary.
+   */
+  webSearch: function BrowserSearch_webSearch() {
+    if (window.location.href != getBrowserURL()) {
+      var win = getTopWin();
+      if (win) {
+        // If there's an open browser window, it should handle this command
+        win.focus();
+        win.BrowserSearch.webSearch();
+      } else {
+        // If there are no open browser windows, open a new one
+        var observer = function observer(subject, topic, data) {
+          if (subject == win) {
+            BrowserSearch.webSearch();
+            Services.obs.removeObserver(observer, "browser-delayed-startup-finished");
+          }
+        }
+        win = window.openDialog(getBrowserURL(), "_blank",
+                                "chrome,all,dialog=no", "about:blank");
+        Services.obs.addObserver(observer, "browser-delayed-startup-finished", false);
+      }
+      return;
+    }
+
+    let focusUrlBarIfSearchFieldIsNotActive = function(aSearchBar) {
+      if (!aSearchBar || document.activeElement != aSearchBar.textbox.inputField) {
+        focusAndSelectUrlBar();
+      }
+    };
+
+    let searchBar = this.searchBar;
+    let placement = CustomizableUI.getPlacementOfWidget("search-container");
+    let focusSearchBar = () => {
+      searchBar = this.searchBar;
+      searchBar.select();
+      focusUrlBarIfSearchFieldIsNotActive(searchBar);
+    };
+    if (placement && placement.area == CustomizableUI.AREA_PANEL) {
+      // The panel is not constructed until the first time it is shown.
+      PanelUI.show().then(focusSearchBar);
+      return;
+    }
+    if (placement && placement.area == CustomizableUI.AREA_NAVBAR && searchBar &&
+        searchBar.parentNode.getAttribute("overflowedItem") == "true") {
+      let navBar = document.getElementById(CustomizableUI.AREA_NAVBAR);
+      navBar.overflowable.show().then(() => {
+        focusSearchBar();
+      });
+      return;
+    }
+    if (searchBar) {
+      if (window.fullScreen)
+        FullScreen.showNavToolbox();
+      searchBar.select();
+    }
+    focusUrlBarIfSearchFieldIsNotActive(searchBar);
+  },
+
+  /**
+   * Loads a search results page, given a set of search terms. Uses the current
+   * engine if the search bar is visible, or the default engine otherwise.
+   *
+   * @param searchText
+   *        The search terms to use for the search.
+   *
+   * @param useNewTab
+   *        Boolean indicating whether or not the search should load in a new
+   *        tab.
+   *
+   * @param purpose [optional]
+   *        A string meant to indicate the context of the search request. This
+   *        allows the search service to provide a different nsISearchSubmission
+   *        depending on e.g. where the search is triggered in the UI.
+   *
+   * @return engine The search engine used to perform a search, or null if no
+   *                search was performed.
+   */
+  _loadSearch: function (searchText, useNewTab, purpose) {
+    let engine;
+
+    // If the search bar is visible, use the current engine, otherwise, fall
+    // back to the default engine.
+    if (isElementVisible(this.searchBar))
+      engine = Services.search.currentEngine;
+    else
+      engine = Services.search.defaultEngine;
+
+    let submission = engine.getSubmission(searchText, null, purpose); // HTML response
+
+    // getSubmission can return null if the engine doesn't have a URL
+    // with a text/html response type.  This is unlikely (since
+    // SearchService._addEngineToStore() should fail for such an engine),
+    // but let's be on the safe side.
+    if (!submission) {
+      return null;
+    }
+
+    let inBackground = Services.prefs.getBoolPref("browser.search.context.loadInBackground");
+    openLinkIn(submission.uri.spec,
+               useNewTab ? "tab" : "current",
+               { postData: submission.postData,
+                 inBackground: inBackground,
+                 relatedToCurrent: true });
+
+    return engine;
+  },
+
+  /**
+   * Just like _loadSearch, but preserving an old API.
+   *
+   * @return string Name of the search engine used to perform a search or null
+   *         if a search was not performed.
+   */
+  loadSearch: function BrowserSearch_search(searchText, useNewTab, purpose) {
+    let engine = BrowserSearch._loadSearch(searchText, useNewTab, purpose);
+    if (!engine) {
+      return null;
+    }
+    return engine.name;
+  },
+
+  /**
+   * Perform a search initiated from the context menu.
+   *
+   * This should only be called from the context menu. See
+   * BrowserSearch.loadSearch for the preferred API.
+   */
+  loadSearchFromContext: function (terms) {
+    let engine = BrowserSearch._loadSearch(terms, true, "contextmenu");
+    if (engine) {
+      BrowserSearch.recordSearchInTelemetry(engine, "contextmenu");
+    }
+  },
+
+  pasteAndSearch: function (event) {
+    BrowserSearch.searchBar.select();
+    goDoCommand("cmd_paste");
+    BrowserSearch.searchBar.handleSearchCommand(event);
+  },
+
+  /**
+   * Returns the search bar element if it is present in the toolbar, null otherwise.
+   */
+  get searchBar() {
+    return document.getElementById("searchbar");
+  },
+
+  get searchEnginesURL() {
+    return formatURL("browser.search.searchEnginesURL", true);
+  },
+
+  loadAddEngines: function BrowserSearch_loadAddEngines() {
+    var newWindowPref = gPrefService.getIntPref("browser.link.open_newwindow");
+    var where = newWindowPref == 3 ? "tab" : "window";
+    openUILinkIn(this.searchEnginesURL, where);
+  },
+
+  _getSearchEngineId: function (engine) {
+    if (engine && engine.identifier) {
+      return engine.identifier;
+    }
+
+    if (!engine || (engine.name === undefined) ||
+        !Services.prefs.getBoolPref("toolkit.telemetry.enabled"))
+      return "other";
+
+    return "other-" + engine.name;
+  },
+
+  /**
+   * Helper to record a search with Telemetry.
+   *
+   * Telemetry records only search counts and nothing pertaining to the search itself.
+   *
+   * @param engine
+   *        (nsISearchEngine) The engine handling the search.
+   * @param source
+   *        (string) Where the search originated from. See BrowserUsageTelemetry for
+   *        allowed values.
+   * @param details [optional]
+   *        An optional parameter passed to |BrowserUsageTelemetry.recordSearch|.
+   *        See its documentation for allowed options.
+   *        Additionally, if the search was a suggested search, |details.selection|
+   *        indicates where the item was in the suggestion list and how the user
+   *        selected it: {selection: {index: The selected index, kind: "key" or "mouse"}}
+   */
+  recordSearchInTelemetry: function (engine, source, details={}) {
+    BrowserUITelemetry.countSearchEvent(source, null, details.selection);
+    try {
+      BrowserUsageTelemetry.recordSearch(engine, source, details);
+    } catch (ex) {
+      Cu.reportError(ex);
+    }
+  },
+
+  /**
+   * Helper to record a one-off search with Telemetry.
+   *
+   * Telemetry records only search counts and nothing pertaining to the search itself.
+   *
+   * @param engine
+   *        (nsISearchEngine) The engine handling the search.
+   * @param source
+   *        (string) Where the search originated from. See BrowserUsageTelemetry for
+   *        allowed values.
+   * @param type
+   *        (string) Indicates how the user selected the search item.
+   * @param where
+   *        (string) Where was the search link opened (e.g. new tab, current tab, ..).
+   */
+  recordOneoffSearchInTelemetry: function (engine, source, type, where) {
+    let id = this._getSearchEngineId(engine) + "." + source;
+    BrowserUITelemetry.countOneoffSearchEvent(id, type, where);
+    try {
+      const details = {type, isOneOff: true};
+      BrowserUsageTelemetry.recordSearch(engine, source, details);
+    } catch (ex) {
+      Cu.reportError(ex);
+    }
+  }
+};
+
+XPCOMUtils.defineConstant(this, "BrowserSearch", BrowserSearch);
+
+function FillHistoryMenu(aParent) {
+  // Lazily add the hover listeners on first showing and never remove them
+  if (!aParent.hasStatusListener) {
+    // Show history item's uri in the status bar when hovering, and clear on exit
+    aParent.addEventListener("DOMMenuItemActive", function(aEvent) {
+      // Only the current page should have the checked attribute, so skip it
+      if (!aEvent.target.hasAttribute("checked"))
+        XULBrowserWindow.setOverLink(aEvent.target.getAttribute("uri"));
+    }, false);
+    aParent.addEventListener("DOMMenuItemInactive", function() {
+      XULBrowserWindow.setOverLink("");
+    }, false);
+
+    aParent.hasStatusListener = true;
+  }
+
+  // Remove old entries if any
+  let children = aParent.childNodes;
+  for (var i = children.length - 1; i >= 0; --i) {
+    if (children[i].hasAttribute("index"))
+      aParent.removeChild(children[i]);
+  }
+
+  const MAX_HISTORY_MENU_ITEMS = 15;
+
+  const tooltipBack = gNavigatorBundle.getString("tabHistory.goBack");
+  const tooltipCurrent = gNavigatorBundle.getString("tabHistory.current");
+  const tooltipForward = gNavigatorBundle.getString("tabHistory.goForward");
+
+  function updateSessionHistory(sessionHistory, initial)
+  {
+    let count = sessionHistory.entries.length;
+
+    if (!initial) {
+      if (count <= 1) {
+        // if there is only one entry now, close the popup.
+        aParent.hidePopup();
+        return;
+      } else if (aParent.id != "backForwardMenu" && !aParent.parentNode.open) {
+        // if the popup wasn't open before, but now needs to be, reopen the menu.
+        // It should trigger FillHistoryMenu again. This might happen with the
+        // delay from click-and-hold menus but skip this for the context menu
+        // (backForwardMenu) rather than figuring out how the menu should be
+        // positioned and opened as it is an extreme edgecase.
+        aParent.parentNode.open = true;
+        return;
+      }
+    }
+
+    let index = sessionHistory.index;
+    let half_length = Math.floor(MAX_HISTORY_MENU_ITEMS / 2);
+    let start = Math.max(index - half_length, 0);
+    let end = Math.min(start == 0 ? MAX_HISTORY_MENU_ITEMS : index + half_length + 1, count);
+    if (end == count) {
+      start = Math.max(count - MAX_HISTORY_MENU_ITEMS, 0);
+    }
+
+    let existingIndex = 0;
+
+    for (let j = end - 1; j >= start; j--) {
+      let entry = sessionHistory.entries[j];
+      let uri = entry.url;
+
+      let item = existingIndex < children.length ?
+                   children[existingIndex] : document.createElement("menuitem");
+
+      let entryURI = BrowserUtils.makeURI(entry.url, entry.charset, null);
+      item.setAttribute("uri", uri);
+      item.setAttribute("label", entry.title || uri);
+      item.setAttribute("index", j);
+
+      // Cache this so that gotoHistoryIndex doesn't need the original index
+      item.setAttribute("historyindex", j - index);
+
+      if (j != index) {
+        PlacesUtils.favicons.getFaviconURLForPage(entryURI, function (aURI) {
+          if (aURI) {
+            let iconURL = PlacesUtils.favicons.getFaviconLinkForIcon(aURI).spec;
+            item.style.listStyleImage = "url(" + iconURL + ")";
+          }
+        });
+      }
+
+      if (j < index) {
+        item.className = "unified-nav-back menuitem-iconic menuitem-with-favicon";
+        item.setAttribute("tooltiptext", tooltipBack);
+      } else if (j == index) {
+        item.setAttribute("type", "radio");
+        item.setAttribute("checked", "true");
+        item.className = "unified-nav-current";
+        item.setAttribute("tooltiptext", tooltipCurrent);
+      } else {
+        item.className = "unified-nav-forward menuitem-iconic menuitem-with-favicon";
+        item.setAttribute("tooltiptext", tooltipForward);
+      }
+
+      if (!item.parentNode) {
+        aParent.appendChild(item);
+      }
+
+      existingIndex++;
+    }
+
+    if (!initial) {
+      let existingLength = children.length;
+      while (existingIndex < existingLength) {
+        aParent.removeChild(aParent.lastChild);
+        existingIndex++;
+      }
+    }
+  }
+
+  let sessionHistory = SessionStore.getSessionHistory(gBrowser.selectedTab, updateSessionHistory);
+  if (!sessionHistory)
+    return false;
+
+  // don't display the popup for a single item
+  if (sessionHistory.entries.length <= 1)
+    return false;
+
+  updateSessionHistory(sessionHistory, true);
+  return true;
+}
+
+function addToUrlbarHistory(aUrlToAdd) {
+  if (!PrivateBrowsingUtils.isWindowPrivate(window) &&
+      aUrlToAdd &&
+      !aUrlToAdd.includes(" ") &&
+      !/[\x00-\x1F]/.test(aUrlToAdd))
+    PlacesUIUtils.markPageAsTyped(aUrlToAdd);
+}
+
+function BrowserDownloadsUI()
+{
+  if (PrivateBrowsingUtils.isWindowPrivate(window)) {
+    openUILinkIn("about:downloads", "tab");
+  } else {
+    PlacesCommandHook.showPlacesOrganizer("Downloads");
+  }
+}
+
+function toOpenWindowByType(inType, uri, features)
+{
+  var topWindow = Services.wm.getMostRecentWindow(inType);
+
+  if (topWindow)
+    topWindow.focus();
+  else if (features)
+    window.open(uri, "_blank", features);
+  else
+    window.open(uri, "_blank", "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar");
+}
+
+function OpenBrowserWindow(options)
+{
+  var telemetryObj = {};
+  TelemetryStopwatch.start("FX_NEW_WINDOW_MS", telemetryObj);
+
+  function newDocumentShown(doc, topic, data) {
+    if (topic == "document-shown" &&
+        doc != document &&
+        doc.defaultView == win) {
+      Services.obs.removeObserver(newDocumentShown, "document-shown");
+      Services.obs.removeObserver(windowClosed, "domwindowclosed");
+      TelemetryStopwatch.finish("FX_NEW_WINDOW_MS", telemetryObj);
+    }
+  }
+
+  function windowClosed(subject) {
+    if (subject == win) {
+      Services.obs.removeObserver(newDocumentShown, "document-shown");
+      Services.obs.removeObserver(windowClosed, "domwindowclosed");
+    }
+  }
+
+  // Make sure to remove the 'document-shown' observer in case the window
+  // is being closed right after it was opened to avoid leaking.
+  Services.obs.addObserver(newDocumentShown, "document-shown", false);
+  Services.obs.addObserver(windowClosed, "domwindowclosed", false);
+
+  var charsetArg = new String();
+  var handler = Components.classes["@mozilla.org/browser/clh;1"]
+                          .getService(Components.interfaces.nsIBrowserHandler);
+  var defaultArgs = handler.defaultArgs;
+  var wintype = document.documentElement.getAttribute('windowtype');
+
+  var extraFeatures = "";
+  if (options && options.private) {
+    extraFeatures = ",private";
+    if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      // Force the new window to load about:privatebrowsing instead of the default home page
+      defaultArgs = "about:privatebrowsing";
+    }
+  } else {
+    extraFeatures = ",non-private";
+  }
+
+  if (options && options.remote) {
+    extraFeatures += ",remote";
+  } else if (options && options.remote === false) {
+    extraFeatures += ",non-remote";
+  }
+
+  // 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 win;
+  if (window && (wintype == "navigator:browser") && window.content && window.content.document)
+  {
+    var DocCharset = window.content.document.characterSet;
+    charsetArg = "charset="+DocCharset;
+
+    // we should "inherit" the charset menu setting in a new window
+    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs, charsetArg);
+  }
+  else // forget about the charset information.
+  {
+    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs);
+  }
+
+  return win;
+}
+
+// Only here for backwards compat, we should remove this soon
+function BrowserCustomizeToolbar() {
+  gCustomizeMode.enter();
+}
+
+/**
+ * Update the global flag that tracks whether or not any edit UI (the Edit menu,
+ * edit-related items in the context menu, and edit-related toolbar buttons
+ * is visible, then update the edit commands' enabled state accordingly.  We use
+ * this flag to skip updating the edit commands on focus or selection changes
+ * when no UI is visible to improve performance (including pageload performance,
+ * since focus changes when you load a new page).
+ *
+ * If UI is visible, we use goUpdateGlobalEditMenuItems to set the commands'
+ * enabled state so the UI will reflect it appropriately.
+ *
+ * If the UI isn't visible, we enable all edit commands so keyboard shortcuts
+ * still work and just lazily disable them as needed when the user presses a
+ * shortcut.
+ *
+ * This doesn't work on Mac, since Mac menus flash when users press their
+ * keyboard shortcuts, so edit UI is essentially always visible on the Mac,
+ * and we need to always update the edit commands.  Thus on Mac this function
+ * is a no op.
+ */
+function updateEditUIVisibility()
+{
+  if (AppConstants.platform == "macosx")
+    return;
+
+  let editMenuPopupState = document.getElementById("menu_EditPopup").state;
+  let contextMenuPopupState = document.getElementById("contentAreaContextMenu").state;
+  let placesContextMenuPopupState = document.getElementById("placesContext").state;
+
+  // The UI is visible if the Edit menu is opening or open, if the context menu
+  // is open, or if the toolbar has been customized to include the Cut, Copy,
+  // or Paste toolbar buttons.
+  gEditUIVisible = editMenuPopupState == "showing" ||
+                   editMenuPopupState == "open" ||
+                   contextMenuPopupState == "showing" ||
+                   contextMenuPopupState == "open" ||
+                   placesContextMenuPopupState == "showing" ||
+                   placesContextMenuPopupState == "open" ||
+                   document.getElementById("edit-controls") ? true : false;
+
+  // If UI is visible, update the edit commands' enabled state to reflect
+  // whether or not they are actually enabled for the current focus/selection.
+  if (gEditUIVisible)
+    goUpdateGlobalEditMenuItems();
+
+  // Otherwise, enable all commands, so that keyboard shortcuts still work,
+  // then lazily determine their actual enabled state when the user presses
+  // a keyboard shortcut.
+  else {
+    goSetCommandEnabled("cmd_undo", true);
+    goSetCommandEnabled("cmd_redo", true);
+    goSetCommandEnabled("cmd_cut", true);
+    goSetCommandEnabled("cmd_copy", true);
+    goSetCommandEnabled("cmd_paste", true);
+    goSetCommandEnabled("cmd_selectAll", true);
+    goSetCommandEnabled("cmd_delete", true);
+    goSetCommandEnabled("cmd_switchTextDirection", true);
+  }
+}
+
+/**
+ * Opens a new tab with the userContextId specified as an attribute of
+ * sourceEvent. This attribute is propagated to the top level originAttributes
+ * living on the tab's docShell.
+ *
+ * @param event
+ *        A click event on a userContext File Menu option
+ */
+function openNewUserContextTab(event)
+{
+  openUILinkIn(BROWSER_NEW_TAB_URL, "tab", {
+    userContextId: parseInt(event.target.getAttribute('data-usercontextid')),
+  });
+}
+
+/**
+ * Updates File Menu User Context UI visibility depending on
+ * privacy.userContext.enabled pref state.
+ */
+function updateUserContextUIVisibility()
+{
+  let menu = document.getElementById("menu_newUserContext");
+  menu.hidden = !Services.prefs.getBoolPref("privacy.userContext.enabled");
+  if (PrivateBrowsingUtils.isWindowPrivate(window)) {
+    menu.setAttribute("disabled", "true");
+  }
+}
+
+/**
+ * Updates the User Context UI indicators if the browser is in a non-default context
+ */
+function updateUserContextUIIndicator()
+{
+  let hbox = document.getElementById("userContext-icons");
+
+  let userContextId = gBrowser.selectedBrowser.getAttribute("usercontextid");
+  if (!userContextId) {
+    hbox.setAttribute("data-identity-color", "");
+    hbox.hidden = true;
+    return;
+  }
+
+  let identity = ContextualIdentityService.getIdentityFromId(userContextId);
+  if (!identity) {
+    hbox.setAttribute("data-identity-color", "");
+    hbox.hidden = true;
+    return;
+  }
+
+  hbox.setAttribute("data-identity-color", identity.color);
+
+  let label = document.getElementById("userContext-label");
+  label.setAttribute("value", ContextualIdentityService.getUserContextLabel(userContextId));
+
+  let indicator = document.getElementById("userContext-indicator");
+  indicator.setAttribute("data-identity-icon", identity.icon);
+
+  hbox.hidden = false;
+}
+
+/**
+ * Makes the Character Encoding menu enabled or disabled as appropriate.
+ * To be called when the View menu or the app menu is opened.
+ */
+function updateCharacterEncodingMenuState()
+{
+  let charsetMenu = document.getElementById("charsetMenu");
+  // gBrowser is null on Mac when the menubar shows in the context of
+  // non-browser windows. The above elements may be null depending on
+  // what parts of the menubar are present. E.g. no app menu on Mac.
+  if (gBrowser && gBrowser.selectedBrowser.mayEnableCharacterEncodingMenu) {
+    if (charsetMenu) {
+      charsetMenu.removeAttribute("disabled");
+    }
+  } else if (charsetMenu) {
+    charsetMenu.setAttribute("disabled", "true");
+  }
+}
+
+var XULBrowserWindow = {
+  // Stored Status, Link and Loading values
+  status: "",
+  defaultStatus: "",
+  overLink: "",
+  startTime: 0,
+  statusText: "",
+  isBusy: false,
+  // Left here for add-on compatibility, see bug 752434
+  inContentWhitelist: [],
+
+  QueryInterface: function (aIID) {
+    if (aIID.equals(Ci.nsIWebProgressListener) ||
+        aIID.equals(Ci.nsIWebProgressListener2) ||
+        aIID.equals(Ci.nsISupportsWeakReference) ||
+        aIID.equals(Ci.nsIXULBrowserWindow) ||
+        aIID.equals(Ci.nsISupports))
+      return this;
+    throw Cr.NS_NOINTERFACE;
+  },
+
+  get stopCommand () {
+    delete this.stopCommand;
+    return this.stopCommand = document.getElementById("Browser:Stop");
+  },
+  get reloadCommand () {
+    delete this.reloadCommand;
+    return this.reloadCommand = document.getElementById("Browser:Reload");
+  },
+  get statusTextField () {
+    return gBrowser.getStatusPanel();
+  },
+  get isImage () {
+    delete this.isImage;
+    return this.isImage = document.getElementById("isImage");
+  },
+  get canViewSource () {
+    delete this.canViewSource;
+    return this.canViewSource = document.getElementById("canViewSource");
+  },
+
+  init: function () {
+    // Initialize the security button's state and tooltip text.
+    var securityUI = gBrowser.securityUI;
+    this.onSecurityChange(null, null, securityUI.state, true);
+  },
+
+  setJSStatus: function () {
+    // unsupported
+  },
+
+  forceInitialBrowserRemote: function() {
+    let initBrowser =
+      document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");
+    return initBrowser.frameLoader.tabParent;
+  },
+
+  forceInitialBrowserNonRemote: function(aOpener) {
+    let initBrowser =
+      document.getAnonymousElementByAttribute(gBrowser, "anonid", "initialBrowser");
+    gBrowser.updateBrowserRemoteness(initBrowser, false, aOpener);
+  },
+
+  setDefaultStatus: function (status) {
+    this.defaultStatus = status;
+    this.updateStatusField();
+  },
+
+  setOverLink: function (url, anchorElt) {
+    // Encode bidirectional formatting characters.
+    // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
+    url = url.replace(/[\u200e\u200f\u202a\u202b\u202c\u202d\u202e]/g,
+                      encodeURIComponent);
+
+    if (gURLBar && gURLBar._mayTrimURLs /* corresponds to browser.urlbar.trimURLs */)
+      url = trimURL(url);
+
+    this.overLink = url;
+    LinkTargetDisplay.update();
+  },
+
+  showTooltip: function (x, y, tooltip, direction) {
+    if (Cc["@mozilla.org/widget/dragservice;1"].getService(Ci.nsIDragService).
+        getCurrentSession()) {
+      return;
+    }
+
+    // The x,y coordinates are relative to the <browser> element using
+    // the chrome zoom level.
+    let elt = document.getElementById("remoteBrowserTooltip");
+    elt.label = tooltip;
+    elt.style.direction = direction;
+
+    let anchor = gBrowser.selectedBrowser;
+    elt.openPopupAtScreen(anchor.boxObject.screenX + x, anchor.boxObject.screenY + y, false, null);
+  },
+
+  hideTooltip: function () {
+    let elt = document.getElementById("remoteBrowserTooltip");
+    elt.hidePopup();
+  },
+
+  getTabCount: function () {
+    return gBrowser.tabs.length;
+  },
+
+  updateStatusField: function () {
+    var text, type, types = ["overLink"];
+    if (this._busyUI)
+      types.push("status");
+    types.push("defaultStatus");
+    for (type of types) {
+      text = this[type];
+      if (text)
+        break;
+    }
+
+    // check the current value so we don't trigger an attribute change
+    // and cause needless (slow!) UI updates
+    if (this.statusText != text) {
+      let field = this.statusTextField;
+      field.setAttribute("previoustype", field.getAttribute("type"));
+      field.setAttribute("type", type);
+      field.label = text;
+      field.setAttribute("crop", type == "overLink" ? "center" : "end");
+      this.statusText = text;
+    }
+  },
+
+  // Called before links are navigated to to allow us to retarget them if needed.
+  onBeforeLinkTraversal: function(originalTarget, linkURI, linkNode, isAppTab) {
+    let target = BrowserUtils.onBeforeLinkTraversal(originalTarget, linkURI, linkNode, isAppTab);
+    SocialUI.closeSocialPanelForLinkTraversal(target, linkNode);
+    return target;
+  },
+
+  // Check whether this URI should load in the current process
+  shouldLoadURI: function(aDocShell, aURI, aReferrer) {
+    if (!gMultiProcessBrowser)
+      return true;
+
+    let browser = aDocShell.QueryInterface(Ci.nsIDocShellTreeItem)
+                           .sameTypeRootTreeItem
+                           .QueryInterface(Ci.nsIDocShell)
+                           .chromeEventHandler;
+
+    // Ignore loads that aren't in the main tabbrowser
+    if (browser.localName != "browser" || !browser.getTabBrowser || browser.getTabBrowser() != gBrowser)
+      return true;
+
+    if (!E10SUtils.shouldLoadURI(aDocShell, aURI, aReferrer)) {
+      E10SUtils.redirectLoad(aDocShell, aURI, aReferrer);
+      return false;
+    }
+
+    return true;
+  },
+
+  onProgressChange: function (aWebProgress, aRequest,
+                              aCurSelfProgress, aMaxSelfProgress,
+                              aCurTotalProgress, aMaxTotalProgress) {
+    // Do nothing.
+  },
+
+  onProgressChange64: function (aWebProgress, aRequest,
+                                aCurSelfProgress, aMaxSelfProgress,
+                                aCurTotalProgress, aMaxTotalProgress) {
+    return this.onProgressChange(aWebProgress, aRequest,
+      aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress,
+      aMaxTotalProgress);
+  },
+
+  // This function fires only for the currently selected tab.
+  onStateChange: function (aWebProgress, aRequest, aStateFlags, aStatus) {
+    const nsIWebProgressListener = Ci.nsIWebProgressListener;
+    const nsIChannel = Ci.nsIChannel;
+
+    let browser = gBrowser.selectedBrowser;
+
+    if (aStateFlags & nsIWebProgressListener.STATE_START &&
+        aStateFlags & nsIWebProgressListener.STATE_IS_NETWORK) {
+
+      if (aRequest && aWebProgress.isTopLevel) {
+        // clear out feed data
+        browser.feeds = null;
+
+        // clear out search-engine data
+        browser.engines = null;
+      }
+
+      this.isBusy = true;
+
+      if (!(aStateFlags & nsIWebProgressListener.STATE_RESTORING)) {
+        this._busyUI = true;
+
+        // XXX: This needs to be based on window activity...
+        this.stopCommand.removeAttribute("disabled");
+        CombinedStopReload.switchToStop();
+      }
+    }
+    else if (aStateFlags & nsIWebProgressListener.STATE_STOP) {
+      // This (thanks to the filter) is a network stop or the last
+      // request stop outside of loading the document, stop throbbers
+      // and progress bars and such
+      if (aRequest) {
+        let msg = "";
+        let location;
+        let canViewSource = true;
+        // Get the URI either from a channel or a pseudo-object
+        if (aRequest instanceof nsIChannel || "URI" in aRequest) {
+          location = aRequest.URI;
+
+          // For keyword URIs clear the user typed value since they will be changed into real URIs
+          if (location.scheme == "keyword" && aWebProgress.isTopLevel)
+            gBrowser.userTypedValue = null;
+
+          canViewSource = !Services.prefs.getBoolPref("view_source.tab") ||
+                          location.scheme != "view-source";
+
+          if (location.spec != "about:blank") {
+            switch (aStatus) {
+              case Components.results.NS_ERROR_NET_TIMEOUT:
+                msg = gNavigatorBundle.getString("nv_timeout");
+                break;
+            }
+          }
+        }
+
+        this.status = "";
+        this.setDefaultStatus(msg);
+
+        // Disable menu entries for images, enable otherwise
+        if (browser.documentContentType && BrowserUtils.mimeTypeIsTextBased(browser.documentContentType)) {
+          this.isImage.removeAttribute('disabled');
+        } else {
+          canViewSource = false;
+          this.isImage.setAttribute('disabled', 'true');
+        }
+
+        if (canViewSource) {
+          this.canViewSource.removeAttribute('disabled');
+        } else {
+          this.canViewSource.setAttribute('disabled', 'true');
+        }
+      }
+
+      this.isBusy = false;
+
+      if (this._busyUI) {
+        this._busyUI = false;
+
+        this.stopCommand.setAttribute("disabled", "true");
+        CombinedStopReload.switchToReload(aRequest instanceof Ci.nsIRequest);
+      }
+    }
+  },
+
+  onLocationChange: function (aWebProgress, aRequest, aLocationURI, aFlags) {
+    var location = aLocationURI ? aLocationURI.spec : "";
+
+    // If displayed, hide the form validation popup.
+    FormValidationHandler.hidePopup();
+
+    let pageTooltip = document.getElementById("aHTMLTooltip");
+    let tooltipNode = pageTooltip.triggerNode;
+    if (tooltipNode) {
+      // Optimise for the common case
+      if (aWebProgress.isTopLevel) {
+        pageTooltip.hidePopup();
+      }
+      else {
+        for (let tooltipWindow = tooltipNode.ownerGlobal;
+             tooltipWindow != tooltipWindow.parent;
+             tooltipWindow = tooltipWindow.parent) {
+          if (tooltipWindow == aWebProgress.DOMWindow) {
+            pageTooltip.hidePopup();
+            break;
+          }
+        }
+      }
+    }
+
+    let browser = gBrowser.selectedBrowser;
+
+    // Disable menu entries for images, enable otherwise
+    if (browser.documentContentType && BrowserUtils.mimeTypeIsTextBased(browser.documentContentType))
+      this.isImage.removeAttribute('disabled');
+    else
+      this.isImage.setAttribute('disabled', 'true');
+
+    this.hideOverLinkImmediately = true;
+    this.setOverLink("", null);
+    this.hideOverLinkImmediately = false;
+
+    // We should probably not do this if the value has changed since the user
+    // searched
+    // Update urlbar only if a new page was loaded on the primary content area
+    // Do not update urlbar if there was a subframe navigation
+
+    if (aWebProgress.isTopLevel) {
+      if ((location == "about:blank" && checkEmptyPageOrigin()) ||
+          location == "") {  // Second condition is for new tabs, otherwise
+                             // reload function is enabled until tab is refreshed.
+        this.reloadCommand.setAttribute("disabled", "true");
+      } else {
+        this.reloadCommand.removeAttribute("disabled");
+      }
+
+      URLBarSetURI(aLocationURI);
+
+      BookmarkingUI.onLocationChange();
+
+      gIdentityHandler.onLocationChange();
+
+      SocialUI.updateState();
+
+      UITour.onLocationChange(location);
+
+      gTabletModePageCounter.inc();
+
+      // Utility functions for disabling find
+      var shouldDisableFind = function shouldDisableFind(aDocument) {
+        let docElt = aDocument.documentElement;
+        return docElt && docElt.getAttribute("disablefastfind") == "true";
+      }
+
+      var disableFindCommands = function disableFindCommands(aDisable) {
+        let findCommands = [document.getElementById("cmd_find"),
+                            document.getElementById("cmd_findAgain"),
+                            document.getElementById("cmd_findPrevious")];
+        for (let elt of findCommands) {
+          if (aDisable)
+            elt.setAttribute("disabled", "true");
+          else
+            elt.removeAttribute("disabled");
+        }
+      }
+
+      var onContentRSChange = function onContentRSChange(e) {
+        if (e.target.readyState != "interactive" && e.target.readyState != "complete")
+          return;
+
+        e.target.removeEventListener("readystatechange", onContentRSChange);
+        disableFindCommands(shouldDisableFind(e.target));
+      }
+
+      // Disable find commands in documents that ask for them to be disabled.
+      if (!gMultiProcessBrowser && aLocationURI &&
+          (aLocationURI.schemeIs("about") || aLocationURI.schemeIs("chrome"))) {
+        // Don't need to re-enable/disable find commands for same-document location changes
+        // (e.g. the replaceStates in about:addons)
+        if (!(aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)) {
+          if (content.document.readyState == "interactive" || content.document.readyState == "complete")
+            disableFindCommands(shouldDisableFind(content.document));
+          else {
+            content.document.addEventListener("readystatechange", onContentRSChange);
+          }
+        }
+      } else
+        disableFindCommands(false);
+
+      // Try not to instantiate gCustomizeMode as much as possible,
+      // so don't use CustomizeMode.jsm to check for URI or customizing.
+      if (location == "about:blank" &&
+          gBrowser.selectedTab.hasAttribute("customizemode")) {
+        gCustomizeMode.enter();
+      } else if (CustomizationHandler.isEnteringCustomizeMode ||
+                 CustomizationHandler.isCustomizing()) {
+        gCustomizeMode.exit();
+      }
+    }
+    UpdateBackForwardCommands(gBrowser.webNavigation);
+    ReaderParent.updateReaderButton(gBrowser.selectedBrowser);
+
+    gGestureSupport.restoreRotationState();
+
+    // See bug 358202, when tabs are switched during a drag operation,
+    // timers don't fire on windows (bug 203573)
+    if (aRequest)
+      setTimeout(function () { XULBrowserWindow.asyncUpdateUI(); }, 0);
+    else
+      this.asyncUpdateUI();
+
+    if (AppConstants.MOZ_CRASHREPORTER && aLocationURI) {
+      let uri = aLocationURI.clone();
+      try {
+        // If the current URI contains a username/password, remove it.
+        uri.userPass = "";
+      } catch (ex) { /* Ignore failures on about: URIs. */ }
+
+      try {
+        gCrashReporter.annotateCrashReport("URL", uri.spec);
+      } catch (ex) {
+        // Don't make noise when the crash reporter is built but not enabled.
+        if (ex.result != Components.results.NS_ERROR_NOT_INITIALIZED) {
+          throw ex;
+        }
+      }
+    }
+  },
+
+  asyncUpdateUI: function () {
+    FeedHandler.updateFeeds();
+    BrowserSearch.updateOpenSearchBadge();
+  },
+
+  // Left here for add-on compatibility, see bug 752434
+  hideChromeForLocation: function() {},
+
+  onStatusChange: function (aWebProgress, aRequest, aStatus, aMessage) {
+    this.status = aMessage;
+    this.updateStatusField();
+  },
+
+  // Properties used to cache security state used to update the UI
+  _state: null,
+  _lastLocation: null,
+
+  // This is called in multiple ways:
+  //  1. Due to the nsIWebProgressListener.onSecurityChange notification.
+  //  2. Called by tabbrowser.xml when updating the current browser.
+  //  3. Called directly during this object's initializations.
+  // aRequest will be null always in case 2 and 3, and sometimes in case 1 (for
+  // instance, there won't be a request when STATE_BLOCKED_TRACKING_CONTENT is observed).
+  onSecurityChange: function (aWebProgress, aRequest, aState, aIsSimulated) {
+    // Don't need to do anything if the data we use to update the UI hasn't
+    // changed
+    let uri = gBrowser.currentURI;
+    let spec = uri.spec;
+    if (this._state == aState &&
+        this._lastLocation == spec)
+      return;
+    this._state = aState;
+    this._lastLocation = spec;
+
+    if (typeof(aIsSimulated) != "boolean" && typeof(aIsSimulated) != "undefined") {
+      throw "onSecurityChange: aIsSimulated receieved an unexpected type";
+    }
+
+    // Make sure the "https" part of the URL is striked out or not,
+    // depending on the current mixed active content blocking state.
+    gURLBar.formatValue();
+
+    try {
+      uri = Services.uriFixup.createExposableURI(uri);
+    } catch (e) {}
+    gIdentityHandler.updateIdentity(this._state, uri);
+    TrackingProtection.onSecurityChange(this._state, aIsSimulated);
+  },
+
+  // simulate all change notifications after switching tabs
+  onUpdateCurrentBrowser: function XWB_onUpdateCurrentBrowser(aStateFlags, aStatus, aMessage, aTotalProgress) {
+    if (FullZoom.updateBackgroundTabs)
+      FullZoom.onLocationChange(gBrowser.currentURI, true);
+    var nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
+    var loadingDone = aStateFlags & nsIWebProgressListener.STATE_STOP;
+    // use a pseudo-object instead of a (potentially nonexistent) channel for getting
+    // a correct error message - and make sure that the UI is always either in
+    // loading (STATE_START) or done (STATE_STOP) mode
+    this.onStateChange(
+      gBrowser.webProgress,
+      { URI: gBrowser.currentURI },
+      loadingDone ? nsIWebProgressListener.STATE_STOP : nsIWebProgressListener.STATE_START,
+      aStatus
+    );
+    // status message and progress value are undefined if we're done with loading
+    if (loadingDone)
+      return;
+    this.onStatusChange(gBrowser.webProgress, null, 0, aMessage);
+  }
+};
+
+var LinkTargetDisplay = {
+  get DELAY_SHOW() {
+     delete this.DELAY_SHOW;
+     return this.DELAY_SHOW = Services.prefs.getIntPref("browser.overlink-delay");
+  },
+
+  DELAY_HIDE: 250,
+  _timer: 0,
+
+  get _isVisible () {
+    return XULBrowserWindow.statusTextField.label != "";
+  },
+
+  update: function () {
+    clearTimeout(this._timer);
+    window.removeEventListener("mousemove", this, true);
+
+    if (!XULBrowserWindow.overLink) {
+      if (XULBrowserWindow.hideOverLinkImmediately)
+        this._hide();
+      else
+        this._timer = setTimeout(this._hide.bind(this), this.DELAY_HIDE);
+      return;
+    }
+
+    if (this._isVisible) {
+      XULBrowserWindow.updateStatusField();
+    } else {
+      // Let the display appear when the mouse doesn't move within the delay
+      this._showDelayed();
+      window.addEventListener("mousemove", this, true);
+    }
+  },
+
+  handleEvent: function (event) {
+    switch (event.type) {
+      case "mousemove":
+        // Restart the delay since the mouse was moved
+        clearTimeout(this._timer);
+        this._showDelayed();
+        break;
+    }
+  },
+
+  _showDelayed: function () {
+    this._timer = setTimeout(function (self) {
+      XULBrowserWindow.updateStatusField();
+      window.removeEventListener("mousemove", self, true);
+    }, this.DELAY_SHOW, this);
+  },
+
+  _hide: function () {
+    clearTimeout(this._timer);
+
+    XULBrowserWindow.updateStatusField();
+  }
+};
+
+var CombinedStopReload = {
+  init: function () {
+    if (this._initialized)
+      return;
+
+    let reload = document.getElementById("urlbar-reload-button");
+    let stop = document.getElementById("urlbar-stop-button");
+    if (!stop || !reload || reload.nextSibling != stop)
+      return;
+
+    this._initialized = true;
+    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
+      reload.setAttribute("displaystop", "true");
+    stop.addEventListener("click", this, false);
+    this.reload = reload;
+    this.stop = stop;
+  },
+
+  uninit: function () {
+    if (!this._initialized)
+      return;
+
+    this._cancelTransition();
+    this._initialized = false;
+    this.stop.removeEventListener("click", this, false);
+    this.reload = null;
+    this.stop = null;
+  },
+
+  handleEvent: function (event) {
+    // the only event we listen to is "click" on the stop button
+    if (event.button == 0 &&
+        !this.stop.disabled)
+      this._stopClicked = true;
+  },
+
+  switchToStop: function () {
+    if (!this._initialized)
+      return;
+
+    this._cancelTransition();
+    this.reload.setAttribute("displaystop", "true");
+  },
+
+  switchToReload: function (aDelay) {
+    if (!this._initialized)
+      return;
+
+    this.reload.removeAttribute("displaystop");
+
+    if (!aDelay || this._stopClicked) {
+      this._stopClicked = false;
+      this._cancelTransition();
+      this.reload.disabled = XULBrowserWindow.reloadCommand
+                                             .getAttribute("disabled") == "true";
+      return;
+    }
+
+    if (this._timer)
+      return;
+
+    // Temporarily disable the reload button to prevent the user from
+    // accidentally reloading the page when intending to click the stop button
+    this.reload.disabled = true;
+    this._timer = setTimeout(function (self) {
+      self._timer = 0;
+      self.reload.disabled = XULBrowserWindow.reloadCommand
+                                             .getAttribute("disabled") == "true";
+    }, 650, this);
+  },
+
+  _cancelTransition: function () {
+    if (this._timer) {
+      clearTimeout(this._timer);
+      this._timer = 0;
+    }
+  }
+};
+
+var TabsProgressListener = {
+  // Keep track of which browsers we've started load timers for, since
+  // we won't see STATE_START events for pre-rendered tabs.
+  _startedLoadTimer: new WeakSet(),
+
+  onStateChange: function (aBrowser, aWebProgress, aRequest, aStateFlags, aStatus) {
+    // Collect telemetry data about tab load times.
+    if (aWebProgress.isTopLevel && (!aRequest.originalURI || aRequest.originalURI.spec.scheme != "about")) {
+      if (aStateFlags & Ci.nsIWebProgressListener.STATE_IS_WINDOW) {
+        if (aStateFlags & Ci.nsIWebProgressListener.STATE_START) {
+          this._startedLoadTimer.add(aBrowser);
+          TelemetryStopwatch.start("FX_PAGE_LOAD_MS", aBrowser);
+          Services.telemetry.getHistogramById("FX_TOTAL_TOP_VISITS").add(true);
+        } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
+                   this._startedLoadTimer.has(aBrowser)) {
+          this._startedLoadTimer.delete(aBrowser);
+          TelemetryStopwatch.finish("FX_PAGE_LOAD_MS", aBrowser);
+        }
+      } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
+                 aStatus == Cr.NS_BINDING_ABORTED &&
+                 this._startedLoadTimer.has(aBrowser)) {
+        this._startedLoadTimer.delete(aBrowser);
+        TelemetryStopwatch.cancel("FX_PAGE_LOAD_MS", aBrowser);
+      }
+    }
+
+    // Attach a listener to watch for "click" events bubbling up from error
+    // pages and other similar pages (like about:newtab). This lets us fix bugs
+    // like 401575 which require error page UI to do privileged things, without
+    // letting error pages have any privilege themselves.
+    // We can't look for this during onLocationChange since at that point the
+    // document URI is not yet the about:-uri of the error page.
+
+    let isRemoteBrowser = aBrowser.isRemoteBrowser;
+    // We check isRemoteBrowser here to avoid requesting the doc CPOW
+    let doc = isRemoteBrowser ? null : aWebProgress.DOMWindow.document;
+
+    if (!isRemoteBrowser &&
+        aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
+        Components.isSuccessCode(aStatus) &&
+        doc.documentURI.startsWith("about:") &&
+        !doc.documentURI.toLowerCase().startsWith("about:blank") &&
+        !doc.documentURI.toLowerCase().startsWith("about:home") &&
+        !doc.documentElement.hasAttribute("hasBrowserHandlers")) {
+      // STATE_STOP may be received twice for documents, thus store an
+      // attribute to ensure handling it just once.
+      doc.documentElement.setAttribute("hasBrowserHandlers", "true");
+      aBrowser.addEventListener("click", BrowserOnClick, true);
+      aBrowser.addEventListener("pagehide", function onPageHide(event) {
+        if (event.target.defaultView.frameElement)
+          return;
+        aBrowser.removeEventListener("click", BrowserOnClick, true);
+        aBrowser.removeEventListener("pagehide", onPageHide, true);
+        if (event.target.documentElement)
+          event.target.documentElement.removeAttribute("hasBrowserHandlers");
+      }, true);
+    }
+  },
+
+  onLocationChange: function (aBrowser, aWebProgress, aRequest, aLocationURI,
+                              aFlags) {
+    // Filter out location changes caused by anchor navigation
+    // or history.push/pop/replaceState.
+    if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT) {
+      // Reader mode actually cares about these:
+      let mm = gBrowser.selectedBrowser.messageManager;
+      mm.sendAsyncMessage("Reader:PushState", {isArticle: gBrowser.selectedBrowser.isArticle});
+      return;
+    }
+
+    // Filter out location changes in sub documents.
+    if (!aWebProgress.isTopLevel)
+      return;
+
+    // Only need to call locationChange if the PopupNotifications object
+    // for this window has already been initialized (i.e. its getter no
+    // longer exists)
+    if (!Object.getOwnPropertyDescriptor(window, "PopupNotifications").get)
+      PopupNotifications.locationChange(aBrowser);
+
+    let tab = gBrowser.getTabForBrowser(aBrowser);
+    if (tab && tab._sharingState) {
+      gBrowser.setBrowserSharing(aBrowser, {});
+      webrtcUI.forgetStreamsFromBrowser(aBrowser);
+    }
+
+    gBrowser.getNotificationBox(aBrowser).removeTransientNotifications();
+
+    FullZoom.onLocationChange(aLocationURI, false, aBrowser);
+  },
+}
+
+function nsBrowserAccess() { }
+
+nsBrowserAccess.prototype = {
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIBrowserDOMWindow, Ci.nsISupports]),
+
+  _openURIInNewTab: function(aURI, aReferrer, aReferrerPolicy, aIsPrivate,
+                             aIsExternal, aForceNotRemote=false,
+                             aUserContextId=Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID,
+                             aOpener=null) {
+    let win, needToFocusWin;
+
+    // try the current window.  if we're in a popup, fall back on the most recent browser window
+    if (window.toolbar.visible)
+      win = window;
+    else {
+      win = RecentWindow.getMostRecentBrowserWindow({private: aIsPrivate});
+      needToFocusWin = true;
+    }
+
+    if (!win) {
+      // we couldn't find a suitable window, a new one needs to be opened.
+      return null;
+    }
+
+    if (aIsExternal && (!aURI || aURI.spec == "about:blank")) {
+      win.BrowserOpenTab(); // this also focuses the location bar
+      win.focus();
+      return win.gBrowser.selectedBrowser;
+    }
+
+    let loadInBackground = gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground");
+
+    let tab = win.gBrowser.loadOneTab(aURI ? aURI.spec : "about:blank", {
+                                      referrerURI: aReferrer,
+                                      referrerPolicy: aReferrerPolicy,
+                                      userContextId: aUserContextId,
+                                      fromExternal: aIsExternal,
+                                      inBackground: loadInBackground,
+                                      forceNotRemote: aForceNotRemote,
+                                      opener: aOpener,
+                                      });
+    let browser = win.gBrowser.getBrowserForTab(tab);
+
+    if (needToFocusWin || (!loadInBackground && aIsExternal))
+      win.focus();
+
+    return browser;
+  },
+
+  openURI: function (aURI, aOpener, aWhere, aFlags) {
+    // This function should only ever be called if we're opening a URI
+    // from a non-remote browser window (via nsContentTreeOwner).
+    if (aOpener && Cu.isCrossProcessWrapper(aOpener)) {
+      Cu.reportError("nsBrowserAccess.openURI was passed a CPOW for aOpener. " +
+                     "openURI should only ever be called from non-remote browsers.");
+      throw Cr.NS_ERROR_FAILURE;
+    }
+
+    var newWindow = null;
+    var isExternal = !!(aFlags & Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
+
+    if (aOpener && isExternal) {
+      Cu.reportError("nsBrowserAccess.openURI did not expect an opener to be " +
+                     "passed if the context is OPEN_EXTERNAL.");
+      throw Cr.NS_ERROR_FAILURE;
+    }
+
+    if (isExternal && aURI && aURI.schemeIs("chrome")) {
+      dump("use --chrome command-line option to load external chrome urls\n");
+      return null;
+    }
+
+    if (aWhere == Ci.nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW) {
+      if (isExternal &&
+          gPrefService.prefHasUserValue("browser.link.open_newwindow.override.external"))
+        aWhere = gPrefService.getIntPref("browser.link.open_newwindow.override.external");
+      else
+        aWhere = gPrefService.getIntPref("browser.link.open_newwindow");
+    }
+
+    let referrer = aOpener ? makeURI(aOpener.location.href) : null;
+    let referrerPolicy = Ci.nsIHttpChannel.REFERRER_POLICY_DEFAULT;
+    if (aOpener && aOpener.document) {
+      referrerPolicy = aOpener.document.referrerPolicy;
+    }
+    let isPrivate = aOpener
+                  ? PrivateBrowsingUtils.isContentWindowPrivate(aOpener)
+                  : PrivateBrowsingUtils.isWindowPrivate(window);
+
+    switch (aWhere) {
+      case Ci.nsIBrowserDOMWindow.OPEN_NEWWINDOW :
+        // FIXME: Bug 408379. So how come this doesn't send the
+        // referrer like the other loads do?
+        var url = aURI ? aURI.spec : "about:blank";
+        let features = "all,dialog=no";
+        if (isPrivate) {
+          features += ",private";
+        }
+        // Pass all params to openDialog to ensure that "url" isn't passed through
+        // loadOneOrMoreURIs, which splits based on "|"
+        newWindow = openDialog(getBrowserURL(), "_blank", features, url, null, null, null);
+        break;
+      case Ci.nsIBrowserDOMWindow.OPEN_NEWTAB :
+        // If we have an opener, that means that the caller is expecting access
+        // to the nsIDOMWindow of the opened tab right away. For e10s windows,
+        // this means forcing the newly opened browser to be non-remote so that
+        // we can hand back the nsIDOMWindow. The XULBrowserWindow.shouldLoadURI
+        // will do the job of shuttling off the newly opened browser to run in
+        // the right process once it starts loading a URI.
+        let forceNotRemote = !!aOpener;
+        let userContextId = aOpener && aOpener.document
+                              ? aOpener.document.nodePrincipal.originAttributes.userContextId
+                              : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID;
+        let openerWindow = (aFlags & Ci.nsIBrowserDOMWindow.OPEN_NO_OPENER) ? null : aOpener;
+        let browser = this._openURIInNewTab(aURI, referrer, referrerPolicy,
+                                            isPrivate, isExternal,
+                                            forceNotRemote, userContextId,
+                                            openerWindow);
+        if (browser)
+          newWindow = browser.contentWindow;
+        break;
+      default : // OPEN_CURRENTWINDOW or an illegal value
+        newWindow = content;
+        if (aURI) {
+          let loadflags = isExternal ?
+                            Ci.nsIWebNavigation.LOAD_FLAGS_FROM_EXTERNAL :
+                            Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
+          gBrowser.loadURIWithFlags(aURI.spec, {
+                                    flags: loadflags,
+                                    referrerURI: referrer,
+                                    referrerPolicy: referrerPolicy,
+                                    });
+        }
+        if (!gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground"))
+          window.focus();
+    }
+    return newWindow;
+  },
+
+  openURIInFrame: function browser_openURIInFrame(aURI, aParams, aWhere, aFlags) {
+    if (aWhere != Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
+      dump("Error: openURIInFrame can only open in new tabs");
+      return null;
+    }
+
+    var isExternal = !!(aFlags & Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
+
+    var userContextId = aParams.openerOriginAttributes &&
+                        ("userContextId" in aParams.openerOriginAttributes)
+                          ? aParams.openerOriginAttributes.userContextId
+                          : Ci.nsIScriptSecurityManager.DEFAULT_USER_CONTEXT_ID
+
+    let browser = this._openURIInNewTab(aURI, aParams.referrer,
+                                        aParams.referrerPolicy,
+                                        aParams.isPrivate,
+                                        isExternal, false,
+                                        userContextId);
+    if (browser)
+      return browser.QueryInterface(Ci.nsIFrameLoaderOwner);
+
+    return null;
+  },
+
+  isTabContentWindow: function (aWindow) {
+    return gBrowser.browsers.some(browser => browser.contentWindow == aWindow);
+  },
+
+  canClose() {
+    return CanCloseWindow();
+  },
+}
+
+function getTogglableToolbars() {
+  let toolbarNodes = Array.slice(gNavToolbox.childNodes);
+  toolbarNodes = toolbarNodes.concat(gNavToolbox.externalToolbars);
+  toolbarNodes = toolbarNodes.filter(node => node.getAttribute("toolbarname"));
+  return toolbarNodes;
+}
+
+function onViewToolbarsPopupShowing(aEvent, aInsertPoint) {
+  var popup = aEvent.target;
+  if (popup != aEvent.currentTarget)
+    return;
+
+  // Empty the menu
+  for (var i = popup.childNodes.length-1; i >= 0; --i) {
+    var deadItem = popup.childNodes[i];
+    if (deadItem.hasAttribute("toolbarId"))
+      popup.removeChild(deadItem);
+  }
+
+  var firstMenuItem = aInsertPoint || popup.firstChild;
+
+  let toolbarNodes = getTogglableToolbars();
+
+  for (let toolbar of toolbarNodes) {
+    let menuItem = document.createElement("menuitem");
+    let hidingAttribute = toolbar.getAttribute("type") == "menubar" ?
+                          "autohide" : "collapsed";
+    menuItem.setAttribute("id", "toggle_" + toolbar.id);
+    menuItem.setAttribute("toolbarId", toolbar.id);
+    menuItem.setAttribute("type", "checkbox");
+    menuItem.setAttribute("label", toolbar.getAttribute("toolbarname"));
+    menuItem.setAttribute("checked", toolbar.getAttribute(hidingAttribute) != "true");
+    menuItem.setAttribute("accesskey", toolbar.getAttribute("accesskey"));
+    if (popup.id != "toolbar-context-menu")
+      menuItem.setAttribute("key", toolbar.getAttribute("key"));
+
+    popup.insertBefore(menuItem, firstMenuItem);
+
+    menuItem.addEventListener("command", onViewToolbarCommand, false);
+  }
+
+
+  let moveToPanel = popup.querySelector(".customize-context-moveToPanel");
+  let removeFromToolbar = popup.querySelector(".customize-context-removeFromToolbar");
+  // View -> Toolbars menu doesn't have the moveToPanel or removeFromToolbar items.
+  if (!moveToPanel || !removeFromToolbar) {
+    return;
+  }
+
+  // triggerNode can be a nested child element of a toolbaritem.
+  let toolbarItem = popup.triggerNode;
+
+  if (toolbarItem && toolbarItem.localName == "toolbarpaletteitem") {
+    toolbarItem = toolbarItem.firstChild;
+  } else if (toolbarItem && toolbarItem.localName != "toolbar") {
+    while (toolbarItem && toolbarItem.parentNode) {
+      let parent = toolbarItem.parentNode;
+      if ((parent.classList && parent.classList.contains("customization-target")) ||
+          parent.getAttribute("overflowfortoolbar") || // Needs to work in the overflow list as well.
+          parent.localName == "toolbarpaletteitem" ||
+          parent.localName == "toolbar")
+        break;
+      toolbarItem = parent;
+    }
+  } else {
+    toolbarItem = null;
+  }
+
+  let showTabStripItems = toolbarItem && toolbarItem.id == "tabbrowser-tabs";
+  for (let node of popup.querySelectorAll('menuitem[contexttype="toolbaritem"]')) {
+    node.hidden = showTabStripItems;
+  }
+
+  for (let node of popup.querySelectorAll('menuitem[contexttype="tabbar"]')) {
+    node.hidden = !showTabStripItems;
+  }
+
+  if (showTabStripItems) {
+    PlacesCommandHook.updateBookmarkAllTabsCommand();
+
+    let haveMultipleTabs = gBrowser.visibleTabs.length > 1;
+    document.getElementById("toolbar-context-reloadAllTabs").disabled = !haveMultipleTabs;
+
+    document.getElementById("toolbar-context-undoCloseTab").disabled =
+      SessionStore.getClosedTabCount(window) == 0;
+    return;
+  }
+
+  // In some cases, we will exit the above loop with toolbarItem being the
+  // xul:document. That has no parentNode, and we should disable the items in
+  // this case.
+  let movable = toolbarItem && toolbarItem.parentNode &&
+                CustomizableUI.isWidgetRemovable(toolbarItem);
+  if (movable) {
+    moveToPanel.removeAttribute("disabled");
+    removeFromToolbar.removeAttribute("disabled");
+  } else {
+    moveToPanel.setAttribute("disabled", true);
+    removeFromToolbar.setAttribute("disabled", true);
+  }
+}
+
+function onViewToolbarCommand(aEvent) {
+  var toolbarId = aEvent.originalTarget.getAttribute("toolbarId");
+  var isVisible = aEvent.originalTarget.getAttribute("checked") == "true";
+  CustomizableUI.setToolbarVisibility(toolbarId, isVisible);
+}
+
+function setToolbarVisibility(toolbar, isVisible, persist=true) {
+  let hidingAttribute;
+  if (toolbar.getAttribute("type") == "menubar") {
+    hidingAttribute = "autohide";
+    if (AppConstants.platform == "linux") {
+      Services.prefs.setBoolPref("ui.key.menuAccessKeyFocuses", !isVisible);
+    }
+  } else {
+    hidingAttribute = "collapsed";
+  }
+
+  toolbar.setAttribute(hidingAttribute, !isVisible);
+  if (persist) {
+    document.persist(toolbar.id, hidingAttribute);
+  }
+
+  let eventParams = {
+    detail: {
+      visible: isVisible
+    },
+    bubbles: true
+  };
+  let event = new CustomEvent("toolbarvisibilitychange", eventParams);
+  toolbar.dispatchEvent(event);
+
+  PlacesToolbarHelper.init();
+  BookmarkingUI.onToolbarVisibilityChange();
+  gBrowser.updateWindowResizers();
+  if (isVisible)
+    ToolbarIconColor.inferFromText();
+}
+
+var TabletModeUpdater = {
+  init() {
+    if (AppConstants.isPlatformAndVersionAtLeast("win", "10")) {
+      this.update(WindowsUIUtils.inTabletMode);
+      Services.obs.addObserver(this, "tablet-mode-change", false);
+    }
+  },
+
+  uninit() {
+    if (AppConstants.isPlatformAndVersionAtLeast("win", "10")) {
+      Services.obs.removeObserver(this, "tablet-mode-change");
+    }
+  },
+
+  observe(subject, topic, data) {
+    this.update(data == "tablet-mode");
+  },
+
+  update(isInTabletMode) {
+    let wasInTabletMode = document.documentElement.hasAttribute("tabletmode");
+    if (isInTabletMode) {
+      document.documentElement.setAttribute("tabletmode", "true");
+    } else {
+      document.documentElement.removeAttribute("tabletmode");
+    }
+    if (wasInTabletMode != isInTabletMode) {
+      TabsInTitlebar.updateAppearance(true);
+    }
+  },
+};
+
+var gTabletModePageCounter = {
+  enabled: false,
+  inc() {
+    this.enabled = AppConstants.isPlatformAndVersionAtLeast("win", "10.0");
+    if (!this.enabled) {
+      this.inc = () => {};
+      return;
+    }
+    this.inc = this._realInc;
+    this.inc();
+  },
+
+  _desktopCount: 0,
+  _tabletCount: 0,
+  _realInc() {
+    let inTabletMode = document.documentElement.hasAttribute("tabletmode");
+    this[inTabletMode ? "_tabletCount" : "_desktopCount"]++;
+  },
+
+  finish() {
+    if (this.enabled) {
+      let histogram = Services.telemetry.getKeyedHistogramById("FX_TABLETMODE_PAGE_LOAD");
+      histogram.add("tablet", this._tabletCount);
+      histogram.add("desktop", this._desktopCount);
+    }
+  },
+};
+
+function displaySecurityInfo()
+{
+  BrowserPageInfo(null, "securityTab");
+}
+
+
+var gHomeButton = {
+  prefDomain: "browser.startup.homepage",
+  observe: function (aSubject, aTopic, aPrefName)
+  {
+    if (aTopic != "nsPref:changed" || aPrefName != this.prefDomain)
+      return;
+
+    this.updateTooltip();
+  },
+
+  updateTooltip: function (homeButton)
+  {
+    if (!homeButton)
+      homeButton = document.getElementById("home-button");
+    if (homeButton) {
+      var homePage = this.getHomePage();
+      homePage = homePage.replace(/\|/g, ', ');
+      if (["about:home", "about:newtab"].includes(homePage.toLowerCase()))
+        homeButton.setAttribute("tooltiptext", homeButton.getAttribute("aboutHomeOverrideTooltip"));
+      else
+        homeButton.setAttribute("tooltiptext", homePage);
+    }
+  },
+
+  getHomePage: function ()
+  {
+    var url;
+    try {
+      url = gPrefService.getComplexValue(this.prefDomain,
+                                Components.interfaces.nsIPrefLocalizedString).data;
+    } catch (e) {
+    }
+
+    // use this if we can't find the pref
+    if (!url) {
+      var configBundle = Services.strings
+                                 .createBundle("chrome://branding/locale/browserconfig.properties");
+      url = configBundle.GetStringFromName(this.prefDomain);
+    }
+
+    return url;
+  },
+};
+
+const nodeToTooltipMap = {
+  "bookmarks-menu-button": "bookmarksMenuButton.tooltip",
+  "new-window-button": "newWindowButton.tooltip",
+  "new-tab-button": "newTabButton.tooltip",
+  "tabs-newtab-button": "newTabButton.tooltip",
+  "fullscreen-button": "fullscreenButton.tooltip",
+  "downloads-button": "downloads.tooltip",
+};
+const nodeToShortcutMap = {
+  "bookmarks-menu-button": "manBookmarkKb",
+  "new-window-button": "key_newNavigator",
+  "new-tab-button": "key_newNavigatorTab",
+  "tabs-newtab-button": "key_newNavigatorTab",
+  "fullscreen-button": "key_fullScreen",
+  "downloads-button": "key_openDownloads"
+};
+
+if (AppConstants.platform == "macosx") {
+  nodeToTooltipMap["print-button"] = "printButton.tooltip";
+  nodeToShortcutMap["print-button"] = "printKb";
+}
+
+const gDynamicTooltipCache = new Map();
+function UpdateDynamicShortcutTooltipText(aTooltip) {
+  let nodeId = aTooltip.triggerNode.id || aTooltip.triggerNode.getAttribute("anonid");
+  if (!gDynamicTooltipCache.has(nodeId) && nodeId in nodeToTooltipMap) {
+    let strId = nodeToTooltipMap[nodeId];
+    let args = [];
+    if (nodeId in nodeToShortcutMap) {
+      let shortcutId = nodeToShortcutMap[nodeId];
+      let shortcut = document.getElementById(shortcutId);
+      if (shortcut) {
+        args.push(ShortcutUtils.prettifyShortcut(shortcut));
+      }
+    }
+    gDynamicTooltipCache.set(nodeId, gNavigatorBundle.getFormattedString(strId, args));
+  }
+  aTooltip.setAttribute("label", gDynamicTooltipCache.get(nodeId));
+}
+
+function getBrowserSelection(aCharLen) {
+  Deprecated.warning("getBrowserSelection",
+                     "https://bugzilla.mozilla.org/show_bug.cgi?id=1134769");
+
+  let focusedElement = document.activeElement;
+  if (focusedElement && focusedElement.localName == "browser" &&
+      focusedElement.isRemoteBrowser) {
+    throw "getBrowserSelection doesn't support child process windows";
+  }
+
+  return BrowserUtils.getSelectionDetails(window, aCharLen).text;
+}
+
+var gWebPanelURI;
+function openWebPanel(title, uri) {
+  // Ensure that the web panels sidebar is open.
+  SidebarUI.show("viewWebPanelsSidebar");
+
+  // Set the title of the panel.
+  SidebarUI.title = title;
+
+  // Tell the Web Panels sidebar to load the bookmark.
+  if (SidebarUI.browser.docShell && SidebarUI.browser.contentDocument &&
+      SidebarUI.browser.contentDocument.getElementById("web-panels-browser")) {
+    SidebarUI.browser.contentWindow.loadWebPanel(uri);
+    if (gWebPanelURI) {
+      gWebPanelURI = "";
+      SidebarUI.browser.removeEventListener("load", asyncOpenWebPanel, true);
+    }
+  } else {
+    // The panel is still being constructed.  Attach an onload handler.
+    if (!gWebPanelURI) {
+      SidebarUI.browser.addEventListener("load", asyncOpenWebPanel, true);
+    }
+    gWebPanelURI = uri;
+  }
+}
+
+function asyncOpenWebPanel(event) {
+  if (gWebPanelURI && SidebarUI.browser.contentDocument &&
+      SidebarUI.browser.contentDocument.getElementById("web-panels-browser")) {
+    SidebarUI.browser.contentWindow.loadWebPanel(gWebPanelURI);
+  }
+  gWebPanelURI = "";
+  SidebarUI.browser.removeEventListener("load", asyncOpenWebPanel, true);
+}
+
+/*
+ * - [ Dependencies ] ---------------------------------------------------------
+ *  utilityOverlay.js:
+ *    - gatherTextUnder
+ */
+
+/**
+ * Extracts linkNode and href for the current click target.
+ *
+ * @param event
+ *        The click event.
+ * @return [href, linkNode].
+ *
+ * @note linkNode will be null if the click wasn't on an anchor
+ *       element (or XLink).
+ */
+function hrefAndLinkNodeForClickEvent(event)
+{
+  function isHTMLLink(aNode)
+  {
+    // Be consistent with what nsContextMenu.js does.
+    return ((aNode instanceof HTMLAnchorElement && aNode.href) ||
+            (aNode instanceof HTMLAreaElement && aNode.href) ||
+            aNode instanceof HTMLLinkElement);
+  }
+
+  let node = event.target;
+  while (node && !isHTMLLink(node)) {
+    node = node.parentNode;
+  }
+
+  if (node)
+    return [node.href, node];
+
+  // If there is no linkNode, try simple XLink.
+  let href, baseURI;
+  node = event.target;
+  while (node && !href) {
+    if (node.nodeType == Node.ELEMENT_NODE &&
+        (node.localName == "a" ||
+         node.namespaceURI == "http://www.w3.org/1998/Math/MathML")) {
+      href = node.getAttribute("href") ||
+             node.getAttributeNS("http://www.w3.org/1999/xlink", "href");
+
+      if (href) {
+        baseURI = node.baseURI;
+        break;
+      }
+    }
+    node = node.parentNode;
+  }
+
+  // In case of XLink, we don't return the node we got href from since
+  // callers expect <a>-like elements.
+  return [href ? makeURLAbsolute(baseURI, href) : null, null];
+}
+
+/**
+ * Called whenever the user clicks in the content area.
+ *
+ * @param event
+ *        The click event.
+ * @param isPanelClick
+ *        Whether the event comes from a web panel.
+ * @note default event is prevented if the click is handled.
+ */
+function contentAreaClick(event, isPanelClick)
+{
+  if (!event.isTrusted || event.defaultPrevented || event.button == 2)
+    return;
+
+  let [href, linkNode] = hrefAndLinkNodeForClickEvent(event);
+  if (!href) {
+    // Not a link, handle middle mouse navigation.
+    if (event.button == 1 &&
+        gPrefService.getBoolPref("middlemouse.contentLoadURL") &&
+        !gPrefService.getBoolPref("general.autoScroll")) {
+      middleMousePaste(event);
+      event.preventDefault();
+    }
+    return;
+  }
+
+  // This code only applies if we have a linkNode (i.e. clicks on real anchor
+  // elements, as opposed to XLink).
+  if (linkNode && event.button == 0 &&
+      !event.ctrlKey && !event.shiftKey && !event.altKey && !event.metaKey) {
+    // A Web panel's links should target the main content area.  Do this
+    // if no modifier keys are down and if there's no target or the target
+    // equals _main (the IE convention) or _content (the Mozilla convention).
+    let target = linkNode.target;
+    let mainTarget = !target || target == "_content" || target  == "_main";
+    if (isPanelClick && mainTarget) {
+      // javascript and data links should be executed in the current browser.
+      if (linkNode.getAttribute("onclick") ||
+          href.startsWith("javascript:") ||
+          href.startsWith("data:"))
+        return;
+
+      try {
+        urlSecurityCheck(href, linkNode.ownerDocument.nodePrincipal);
+      }
+      catch (ex) {
+        // Prevent loading unsecure destinations.
+        event.preventDefault();
+        return;
+      }
+
+      loadURI(href, null, null, false);
+      event.preventDefault();
+      return;
+    }
+
+    if (linkNode.getAttribute("rel") == "sidebar") {
+      // This is the Opera convention for a special link that, when clicked,
+      // allows to add a sidebar panel.  The link's title attribute contains
+      // the title that should be used for the sidebar panel.
+      PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                       , type: "bookmark"
+                                       , uri: makeURI(href)
+                                       , title: linkNode.getAttribute("title")
+                                       , loadBookmarkInSidebar: true
+                                       , hiddenRows: [ "description"
+                                                     , "location"
+                                                     , "keyword" ]
+                                       }, window);
+      event.preventDefault();
+      return;
+    }
+  }
+
+  handleLinkClick(event, href, linkNode);
+
+  // Mark the page as a user followed link.  This is done so that history can
+  // distinguish automatic embed visits from user activated ones.  For example
+  // pages loaded in frames are embed visits and lost with the session, while
+  // visits across frames should be preserved.
+  try {
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      PlacesUIUtils.markPageAsFollowedLink(href);
+  } catch (ex) { /* Skip invalid URIs. */ }
+}
+
+/**
+ * Handles clicks on links.
+ *
+ * @return true if the click event was handled, false otherwise.
+ */
+function handleLinkClick(event, href, linkNode) {
+  if (event.button == 2) // right click
+    return false;
+
+  var where = whereToOpenLink(event);
+  if (where == "current")
+    return false;
+
+  var doc = event.target.ownerDocument;
+
+  if (where == "save") {
+    saveURL(href, linkNode ? gatherTextUnder(linkNode) : "", null, true,
+            true, doc.documentURIObject, doc);
+    event.preventDefault();
+    return true;
+  }
+
+  var referrerURI = doc.documentURIObject;
+  // if the mixedContentChannel is present and the referring URI passes
+  // a same origin check with the target URI, we can preserve the users
+  // decision of disabling MCB on a page for it's child tabs.
+  var persistAllowMixedContentInChildTab = false;
+
+  if (where == "tab" && gBrowser.docShell.mixedContentChannel) {
+    const sm = Services.scriptSecurityManager;
+    try {
+      var targetURI = makeURI(href);
+      sm.checkSameOriginURI(referrerURI, targetURI, false);
+      persistAllowMixedContentInChildTab = true;
+    }
+    catch (e) { }
+  }
+
+  // first get document wide referrer policy, then
+  // get referrer attribute from clicked link and parse it and
+  // allow per element referrer to overrule the document wide referrer if enabled
+  let referrerPolicy = doc.referrerPolicy;
+  if (Services.prefs.getBoolPref("network.http.enablePerElementReferrer") &&
+      linkNode) {
+    let referrerAttrValue = Services.netUtils.parseAttributePolicyString(linkNode.
+                            getAttribute("referrerpolicy"));
+    if (referrerAttrValue != Ci.nsIHttpChannel.REFERRER_POLICY_UNSET) {
+      referrerPolicy = referrerAttrValue;
+    }
+  }
+
+  urlSecurityCheck(href, doc.nodePrincipal);
+  let params = {
+    charset: doc.characterSet,
+    allowMixedContent: persistAllowMixedContentInChildTab,
+    referrerURI: referrerURI,
+    referrerPolicy: referrerPolicy,
+    noReferrer: BrowserUtils.linkHasNoReferrer(linkNode),
+    originPrincipal: doc.nodePrincipal,
+  };
+
+  // The new tab/window must use the same userContextId
+  if (doc.nodePrincipal.originAttributes.userContextId) {
+    params.userContextId = doc.nodePrincipal.originAttributes.userContextId;
+  }
+
+  openLinkIn(href, where, params);
+  event.preventDefault();
+  return true;
+}
+
+function middleMousePaste(event) {
+  let clipboard = readFromClipboard();
+  if (!clipboard)
+    return;
+
+  // Strip embedded newlines and surrounding whitespace, to match the URL
+  // bar's behavior (stripsurroundingwhitespace)
+  clipboard = clipboard.replace(/\s*\n\s*/g, "");
+
+  clipboard = stripUnsafeProtocolOnPaste(clipboard);
+
+  // if it's not the current tab, we don't need to do anything because the
+  // browser doesn't exist.
+  let where = whereToOpenLink(event, true, false);
+  let lastLocationChange;
+  if (where == "current") {
+    lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;
+  }
+
+  getShortcutOrURIAndPostData(clipboard).then(data => {
+    try {
+      makeURI(data.url);
+    } catch (ex) {
+      // Not a valid URI.
+      return;
+    }
+
+    try {
+      addToUrlbarHistory(data.url);
+    } catch (ex) {
+      // Things may go wrong when adding url to session history,
+      // but don't let that interfere with the loading of the url.
+      Cu.reportError(ex);
+    }
+
+    if (where != "current" ||
+        lastLocationChange == gBrowser.selectedBrowser.lastLocationChange) {
+      openUILink(data.url, event,
+                 { ignoreButton: true,
+                   disallowInheritPrincipal: !data.mayInheritPrincipal });
+    }
+  });
+
+  event.stopPropagation();
+}
+
+function stripUnsafeProtocolOnPaste(pasteData) {
+  // Don't allow pasting javascript URIs since we don't support
+  // LOAD_FLAGS_DISALLOW_INHERIT_PRINCIPAL for those.
+  return pasteData.replace(/^(?:\s*javascript:)+/i, "");
+}
+
+// handleDroppedLink has the following 2 overloads:
+//   handleDroppedLink(event, url, name)
+//   handleDroppedLink(event, links)
+function handleDroppedLink(event, urlOrLinks, name)
+{
+  let links;
+  if (Array.isArray(urlOrLinks)) {
+    links = urlOrLinks;
+  } else {
+    links = [{ url: urlOrLinks, name, type: "" }];
+  }
+
+  let lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;
+
+  let userContextId = gBrowser.selectedBrowser.getAttribute("usercontextid");
+
+  // event is null if links are dropped in content process.
+  // inBackground should be false, as it's loading into current browser.
+  let inBackground = false;
+  if (event) {
+    inBackground = Services.prefs.getBoolPref("browser.tabs.loadInBackground");
+    if (event.shiftKey)
+      inBackground = !inBackground;
+  }
+
+  Task.spawn(function*() {
+    let urls = [];
+    let postDatas = [];
+    for (let link of links) {
+      let data = yield getShortcutOrURIAndPostData(link.url);
+      urls.push(data.url);
+      postDatas.push(data.postData);
+    }
+    if (lastLocationChange == gBrowser.selectedBrowser.lastLocationChange) {
+      gBrowser.loadTabs(urls, {
+        inBackground,
+        replace: true,
+        allowThirdPartyFixup: false,
+        postDatas,
+        userContextId,
+      });
+    }
+  });
+
+  // If links are dropped in content process, event.preventDefault() should be
+  // called in content process.
+  if (event) {
+    // Keep the event from being handled by the dragDrop listeners
+    // built-in to gecko if they happen to be above us.
+    event.preventDefault();
+  }
+}
+
+function BrowserSetForcedCharacterSet(aCharset)
+{
+  if (aCharset) {
+    gBrowser.selectedBrowser.characterSet = aCharset;
+    // Save the forced character-set
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      PlacesUtils.setCharsetForURI(getWebNavigation().currentURI, aCharset);
+  }
+  BrowserCharsetReload();
+}
+
+function BrowserCharsetReload()
+{
+  BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_CHARSET_CHANGE);
+}
+
+function UpdateCurrentCharset(target) {
+  let selectedCharset = CharsetMenu.foldCharset(gBrowser.selectedBrowser.characterSet);
+  for (let menuItem of target.getElementsByTagName("menuitem")) {
+    let isSelected = menuItem.getAttribute("charset") === selectedCharset;
+    menuItem.setAttribute("checked", isSelected);
+  }
+}
+
+var gPageStyleMenu = {
+  // This maps from a <browser> element (or, more specifically, a
+  // browser's permanentKey) to an Object that contains the most recent
+  // information about the browser content's stylesheets. That Object
+  // is populated via the PageStyle:StyleSheets message from the content
+  // process. The Object should have the following structure:
+  //
+  // filteredStyleSheets (Array):
+  //   An Array of objects with a filtered list representing all stylesheets
+  //   that the current page offers. Each object has the following members:
+  //
+  //   title (String):
+  //     The title of the stylesheet
+  //
+  //   disabled (bool):
+  //     Whether or not the stylesheet is currently applied
+  //
+  //   href (String):
+  //     The URL of the stylesheet. Stylesheets loaded via a data URL will
+  //     have this property set to null.
+  //
+  // authorStyleDisabled (bool):
+  //   Whether or not the user currently has "No Style" selected for
+  //   the current page.
+  //
+  // preferredStyleSheetSet (bool):
+  //   Whether or not the user currently has the "Default" style selected
+  //   for the current page.
+  //
+  _pageStyleSheets: new WeakMap(),
+
+  init: function() {
+    let mm = window.messageManager;
+    mm.addMessageListener("PageStyle:StyleSheets", (msg) => {
+      this._pageStyleSheets.set(msg.target.permanentKey, msg.data);
+    });
+  },
+
+  /**
+   * Returns an array of Objects representing stylesheets in a
+   * browser. Note that the pageshow event needs to fire in content
+   * before this information will be available.
+   *
+   * @param browser (optional)
+   *        The <xul:browser> to search for stylesheets. If omitted, this
+   *        defaults to the currently selected tab's browser.
+   * @returns Array
+   *        An Array of Objects representing stylesheets in the browser.
+   *        See the documentation for gPageStyleMenu for a description
+   *        of the Object structure.
+   */
+  getBrowserStyleSheets: function (browser) {
+    if (!browser) {
+      browser = gBrowser.selectedBrowser;
+    }
+
+    let data = this._pageStyleSheets.get(browser.permanentKey);
+    if (!data) {
+      return [];
+    }
+    return data.filteredStyleSheets;
+  },
+
+  _getStyleSheetInfo: function (browser) {
+    let data = this._pageStyleSheets.get(browser.permanentKey);
+    if (!data) {
+      return {
+        filteredStyleSheets: [],
+        authorStyleDisabled: false,
+        preferredStyleSheetSet: true
+      };
+    }
+
+    return data;
+  },
+
+  fillPopup: function (menuPopup) {
+    let styleSheetInfo = this._getStyleSheetInfo(gBrowser.selectedBrowser);
+    var noStyle = menuPopup.firstChild;
+    var persistentOnly = noStyle.nextSibling;
+    var sep = persistentOnly.nextSibling;
+    while (sep.nextSibling)
+      menuPopup.removeChild(sep.nextSibling);
+
+    let styleSheets = styleSheetInfo.filteredStyleSheets;
+    var currentStyleSheets = {};
+    var styleDisabled = styleSheetInfo.authorStyleDisabled;
+    var haveAltSheets = false;
+    var altStyleSelected = false;
+
+    for (let currentStyleSheet of styleSheets) {
+      if (!currentStyleSheet.disabled)
+        altStyleSelected = true;
+
+      haveAltSheets = true;
+
+      let lastWithSameTitle = null;
+      if (currentStyleSheet.title in currentStyleSheets)
+        lastWithSameTitle = currentStyleSheets[currentStyleSheet.title];
+
+      if (!lastWithSameTitle) {
+        let menuItem = document.createElement("menuitem");
+        menuItem.setAttribute("type", "radio");
+        menuItem.setAttribute("label", currentStyleSheet.title);
+        menuItem.setAttribute("data", currentStyleSheet.title);
+        menuItem.setAttribute("checked", !currentStyleSheet.disabled && !styleDisabled);
+        menuItem.setAttribute("oncommand", "gPageStyleMenu.switchStyleSheet(this.getAttribute('data'));");
+        menuPopup.appendChild(menuItem);
+        currentStyleSheets[currentStyleSheet.title] = menuItem;
+      } else if (currentStyleSheet.disabled) {
+        lastWithSameTitle.removeAttribute("checked");
+      }
+    }
+
+    noStyle.setAttribute("checked", styleDisabled);
+    persistentOnly.setAttribute("checked", !altStyleSelected && !styleDisabled);
+    persistentOnly.hidden = styleSheetInfo.preferredStyleSheetSet ? haveAltSheets : false;
+    sep.hidden = (noStyle.hidden && persistentOnly.hidden) || !haveAltSheets;
+  },
+
+  switchStyleSheet: function (title) {
+    let mm = gBrowser.selectedBrowser.messageManager;
+    mm.sendAsyncMessage("PageStyle:Switch", {title: title});
+  },
+
+  disableStyle: function () {
+    let mm = gBrowser.selectedBrowser.messageManager;
+    mm.sendAsyncMessage("PageStyle:Disable");
+  },
+};
+
+/* Legacy global page-style functions */
+var stylesheetFillPopup = gPageStyleMenu.fillPopup.bind(gPageStyleMenu);
+function stylesheetSwitchAll(contentWindow, title) {
+  // We ignore the contentWindow param. Add-ons don't appear to use
+  // it, and it's difficult to support in e10s (where it will be a
+  // CPOW).
+  gPageStyleMenu.switchStyleSheet(title);
+}
+function setStyleDisabled(disabled) {
+  if (disabled)
+    gPageStyleMenu.disableStyle();
+}
+
+
+var LanguageDetectionListener = {
+  init: function() {
+    window.messageManager.addMessageListener("Translation:DocumentState", msg => {
+      Translation.documentStateReceived(msg.target, msg.data);
+    });
+  }
+};
+
+
+var BrowserOffline = {
+  _inited: false,
+
+  // BrowserOffline Public Methods
+  init: function ()
+  {
+    if (!this._uiElement)
+      this._uiElement = document.getElementById("workOfflineMenuitemState");
+
+    Services.obs.addObserver(this, "network:offline-status-changed", false);
+
+    this._updateOfflineUI(Services.io.offline);
+
+    this._inited = true;
+  },
+
+  uninit: function ()
+  {
+    if (this._inited) {
+      Services.obs.removeObserver(this, "network:offline-status-changed");
+    }
+  },
+
+  toggleOfflineStatus: function ()
+  {
+    var ioService = Services.io;
+
+    if (!ioService.offline && !this._canGoOffline()) {
+      this._updateOfflineUI(false);
+      return;
+    }
+
+    ioService.offline = !ioService.offline;
+  },
+
+  // nsIObserver
+  observe: function (aSubject, aTopic, aState)
+  {
+    if (aTopic != "network:offline-status-changed")
+      return;
+
+    // This notification is also received because of a loss in connectivity,
+    // which we ignore by updating the UI to the current value of io.offline
+    this._updateOfflineUI(Services.io.offline);
+  },
+
+  // BrowserOffline Implementation Methods
+  _canGoOffline: function ()
+  {
+    try {
+      var cancelGoOffline = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
+      Services.obs.notifyObservers(cancelGoOffline, "offline-requested", null);
+
+      // Something aborted the quit process.
+      if (cancelGoOffline.data)
+        return false;
+    }
+    catch (ex) {
+    }
+
+    return true;
+  },
+
+  _uiElement: null,
+  _updateOfflineUI: function (aOffline)
+  {
+    var offlineLocked = gPrefService.prefIsLocked("network.online");
+    if (offlineLocked)
+      this._uiElement.setAttribute("disabled", "true");
+
+    this._uiElement.setAttribute("checked", aOffline);
+  }
+};
+
+var OfflineApps = {
+  warnUsage(browser, uri) {
+    if (!browser)
+      return;
+
+    let mainAction = {
+      label: gNavigatorBundle.getString("offlineApps.manageUsage"),
+      accessKey: gNavigatorBundle.getString("offlineApps.manageUsageAccessKey"),
+      callback: this.manage
+    };
+
+    let warnQuotaKB = Services.prefs.getIntPref("offline-apps.quota.warn");
+    // This message shows the quota in MB, and so we divide the quota (in kb) by 1024.
+    let message = gNavigatorBundle.getFormattedString("offlineApps.usage",
+                                                      [ uri.host,
+                                                        warnQuotaKB / 1024 ]);
+
+    let anchorID = "indexedDB-notification-icon";
+    PopupNotifications.show(browser, "offline-app-usage", message,
+                            anchorID, mainAction);
+
+    // Now that we've warned once, prevent the warning from showing up
+    // again.
+    Services.perms.add(uri, "offline-app",
+                       Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN);
+  },
+
+  // XXX: duplicated in preferences/advanced.js
+  _getOfflineAppUsage(host, groups) {
+    let cacheService = Cc["@mozilla.org/network/application-cache-service;1"].
+                       getService(Ci.nsIApplicationCacheService);
+    if (!groups) {
+      try {
+        groups = cacheService.getGroups();
+      } catch (ex) {
+        return 0;
+      }
+    }
+
+    let usage = 0;
+    for (let group of groups) {
+      let uri = Services.io.newURI(group, null, null);
+      if (uri.asciiHost == host) {
+        let cache = cacheService.getActiveCache(group);
+        usage += cache.usage;
+      }
+    }
+
+    return usage;
+  },
+
+  _usedMoreThanWarnQuota(uri) {
+    // if the user has already allowed excessive usage, don't bother checking
+    if (Services.perms.testExactPermission(uri, "offline-app") !=
+        Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN) {
+      let usageBytes = this._getOfflineAppUsage(uri.asciiHost);
+      let warnQuotaKB = Services.prefs.getIntPref("offline-apps.quota.warn");
+      // The pref is in kb, the usage we get is in bytes, so multiply the quota
+      // to compare correctly:
+      if (usageBytes >= warnQuotaKB * 1024) {
+        return true;
+      }
+    }
+
+    return false;
+  },
+
+  requestPermission(browser, docId, uri) {
+    let host = uri.asciiHost;
+    let notificationID = "offline-app-requested-" + host;
+    let notification = PopupNotifications.getNotification(notificationID, browser);
+
+    if (notification) {
+      notification.options.controlledItems.push([
+        Cu.getWeakReference(browser), docId, uri
+      ]);
+    } else {
+      let mainAction = {
+        label: gNavigatorBundle.getString("offlineApps.allow"),
+        accessKey: gNavigatorBundle.getString("offlineApps.allowAccessKey"),
+        callback: function() {
+          for (let [browser, docId, uri] of notification.options.controlledItems) {
+            OfflineApps.allowSite(browser, docId, uri);
+          }
+        }
+      };
+      let secondaryActions = [{
+        label: gNavigatorBundle.getString("offlineApps.never"),
+        accessKey: gNavigatorBundle.getString("offlineApps.neverAccessKey"),
+        callback: function() {
+          for (let [, , uri] of notification.options.controlledItems) {
+            OfflineApps.disallowSite(uri);
+          }
+        }
+      }];
+      let message = gNavigatorBundle.getFormattedString("offlineApps.available",
+                                                        [host]);
+      let anchorID = "indexedDB-notification-icon";
+      let options = {
+        controlledItems : [[Cu.getWeakReference(browser), docId, uri]]
+      };
+      notification = PopupNotifications.show(browser, notificationID, message,
+                                             anchorID, mainAction,
+                                             secondaryActions, options);
+    }
+  },
+
+  disallowSite(uri) {
+    Services.perms.add(uri, "offline-app", Services.perms.DENY_ACTION);
+  },
+
+  allowSite(browserRef, docId, uri) {
+    Services.perms.add(uri, "offline-app", Services.perms.ALLOW_ACTION);
+
+    // When a site is enabled while loading, manifest resources will
+    // start fetching immediately.  This one time we need to do it
+    // ourselves.
+    let browser = browserRef.get();
+    if (browser && browser.messageManager) {
+      browser.messageManager.sendAsyncMessage("OfflineApps:StartFetching", {
+        docId,
+      });
+    }
+  },
+
+  manage() {
+    openAdvancedPreferences("networkTab");
+  },
+
+  receiveMessage(msg) {
+    switch (msg.name) {
+      case "OfflineApps:CheckUsage":
+        let uri = makeURI(msg.data.uri);
+        if (this._usedMoreThanWarnQuota(uri)) {
+          this.warnUsage(msg.target, uri);
+        }
+        break;
+      case "OfflineApps:RequestPermission":
+        this.requestPermission(msg.target, msg.data.docId, makeURI(msg.data.uri));
+        break;
+    }
+  },
+
+  init() {
+    let mm = window.messageManager;
+    mm.addMessageListener("OfflineApps:CheckUsage", this);
+    mm.addMessageListener("OfflineApps:RequestPermission", this);
+  },
+};
+
+var IndexedDBPromptHelper = {
+  _permissionsPrompt: "indexedDB-permissions-prompt",
+  _permissionsResponse: "indexedDB-permissions-response",
+
+  _notificationIcon: "indexedDB-notification-icon",
+
+  init:
+  function IndexedDBPromptHelper_init() {
+    Services.obs.addObserver(this, this._permissionsPrompt, false);
+  },
+
+  uninit:
+  function IndexedDBPromptHelper_uninit() {
+    Services.obs.removeObserver(this, this._permissionsPrompt);
+  },
+
+  observe:
+  function IndexedDBPromptHelper_observe(subject, topic, data) {
+    if (topic != this._permissionsPrompt) {
+      throw new Error("Unexpected topic!");
+    }
+
+    var requestor = subject.QueryInterface(Ci.nsIInterfaceRequestor);
+
+    var browser = requestor.getInterface(Ci.nsIDOMNode);
+    if (browser.ownerGlobal != window) {
+      // Only listen for notifications for browsers in our chrome window.
+      return;
+    }
+
+    var host = browser.currentURI.asciiHost;
+
+    var message;
+    var responseTopic;
+    if (topic == this._permissionsPrompt) {
+      message = gNavigatorBundle.getFormattedString("offlineApps.available",
+                                                    [ host ]);
+      responseTopic = this._permissionsResponse;
+    }
+
+    const hiddenTimeoutDuration = 30000; // 30 seconds
+    const firstTimeoutDuration = 300000; // 5 minutes
+
+    var timeoutId;
+
+    var observer = requestor.getInterface(Ci.nsIObserver);
+
+    var mainAction = {
+      label: gNavigatorBundle.getString("offlineApps.allow"),
+      accessKey: gNavigatorBundle.getString("offlineApps.allowAccessKey"),
+      callback: function() {
+        clearTimeout(timeoutId);
+        observer.observe(null, responseTopic,
+                         Ci.nsIPermissionManager.ALLOW_ACTION);
+      }
+    };
+
+    var secondaryActions = [
+      {
+        label: gNavigatorBundle.getString("offlineApps.never"),
+        accessKey: gNavigatorBundle.getString("offlineApps.neverAccessKey"),
+        callback: function() {
+          clearTimeout(timeoutId);
+          observer.observe(null, responseTopic,
+                           Ci.nsIPermissionManager.DENY_ACTION);
+        }
+      }
+    ];
+
+    // This will be set to the result of PopupNotifications.show().
+    var notification;
+
+    function timeoutNotification() {
+      // Remove the notification.
+      if (notification) {
+        notification.remove();
+      }
+
+      // Clear all of our timeout stuff. We may be called directly, not just
+      // when the timeout actually elapses.
+      clearTimeout(timeoutId);
+
+      // And tell the page that the popup timed out.
+      observer.observe(null, responseTopic,
+                       Ci.nsIPermissionManager.UNKNOWN_ACTION);
+    }
+
+    var options = {
+      eventCallback: function(state) {
+        // Don't do anything if the timeout has not been set yet.
+        if (!timeoutId) {
+          return;
+        }
+
+        // If the popup is being dismissed start the short timeout.
+        if (state == "dismissed") {
+          clearTimeout(timeoutId);
+          timeoutId = setTimeout(timeoutNotification, hiddenTimeoutDuration);
+          return;
+        }
+
+        // If the popup is being re-shown then clear the timeout allowing
+        // unlimited waiting.
+        if (state == "shown") {
+          clearTimeout(timeoutId);
+        }
+      }
+    };
+
+    notification = PopupNotifications.show(browser, topic, message,
+                                           this._notificationIcon, mainAction,
+                                           secondaryActions, options);
+
+    // Set the timeoutId after the popup has been created, and use the long
+    // timeout value. If the user doesn't notice the popup after this amount of
+    // time then it is most likely not visible and we want to alert the page.
+    timeoutId = setTimeout(timeoutNotification, firstTimeoutDuration);
+  }
+};
+
+function CanCloseWindow()
+{
+  // Avoid redundant calls to canClose from showing multiple
+  // PermitUnload dialogs.
+  if (Services.startup.shuttingDown || window.skipNextCanClose) {
+    return true;
+  }
+
+  for (let browser of gBrowser.browsers) {
+    let {permitUnload, timedOut} = browser.permitUnload();
+    if (timedOut) {
+      return true;
+    }
+    if (!permitUnload) {
+      return false;
+    }
+  }
+  return true;
+}
+
+function WindowIsClosing()
+{
+  if (!closeWindow(false, warnAboutClosingWindow))
+    return false;
+
+  // In theory we should exit here and the Window's internal Close
+  // method should trigger canClose on nsBrowserAccess. However, by
+  // that point it's too late to be able to show a prompt for
+  // PermitUnload. So we do it here, when we still can.
+  if (CanCloseWindow()) {
+    // This flag ensures that the later canClose call does nothing.
+    // It's only needed to make tests pass, since they detect the
+    // prompt even when it's not actually shown.
+    window.skipNextCanClose = true;
+    return true;
+  }
+
+  return false;
+}
+
+/**
+ * Checks if this is the last full *browser* window around. If it is, this will
+ * be communicated like quitting. Otherwise, we warn about closing multiple tabs.
+ * @returns true if closing can proceed, false if it got cancelled.
+ */
+function warnAboutClosingWindow() {
+  // Popups aren't considered full browser windows; we also ignore private windows.
+  let isPBWindow = PrivateBrowsingUtils.isWindowPrivate(window) &&
+        !PrivateBrowsingUtils.permanentPrivateBrowsing;
+  if (!isPBWindow && !toolbar.visible)
+    return gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
+
+  // Figure out if there's at least one other browser window around.
+  let otherPBWindowExists = false;
+  let nonPopupPresent = false;
+  for (let win of browserWindows()) {
+    if (!win.closed && win != window) {
+      if (isPBWindow && PrivateBrowsingUtils.isWindowPrivate(win))
+        otherPBWindowExists = true;
+      if (win.toolbar.visible)
+        nonPopupPresent = true;
+      // If the current window is not in private browsing mode we don't need to
+      // look for other pb windows, we can leave the loop when finding the
+      // first non-popup window. If however the current window is in private
+      // browsing mode then we need at least one other pb and one non-popup
+      // window to break out early.
+      if ((!isPBWindow || otherPBWindowExists) && nonPopupPresent)
+        break;
+    }
+  }
+
+  if (isPBWindow && !otherPBWindowExists) {
+    let exitingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
+                          createInstance(Ci.nsISupportsPRBool);
+    exitingCanceled.data = false;
+    Services.obs.notifyObservers(exitingCanceled,
+                                 "last-pb-context-exiting",
+                                 null);
+    if (exitingCanceled.data)
+      return false;
+  }
+
+  if (nonPopupPresent) {
+    return isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
+  }
+
+  let os = Services.obs;
+
+  let closingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
+                        createInstance(Ci.nsISupportsPRBool);
+  os.notifyObservers(closingCanceled,
+                     "browser-lastwindow-close-requested", null);
+  if (closingCanceled.data)
+    return false;
+
+  os.notifyObservers(null, "browser-lastwindow-close-granted", null);
+
+  // OS X doesn't quit the application when the last window is closed, but keeps
+  // the session alive. Hence don't prompt users to save tabs, but warn about
+  // closing multiple tabs.
+  return AppConstants.platform != "macosx"
+         || (isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL));
+}
+
+var MailIntegration = {
+  sendLinkForBrowser: function (aBrowser) {
+    this.sendMessage(aBrowser.currentURI.spec, aBrowser.contentTitle);
+  },
+
+  sendMessage: function (aBody, aSubject) {
+    // generate a mailto url based on the url and the url's title
+    var mailtoUrl = "mailto:";
+    if (aBody) {
+      mailtoUrl += "?body=" + encodeURIComponent(aBody);
+      mailtoUrl += "&subject=" + encodeURIComponent(aSubject);
+    }
+
+    var uri = makeURI(mailtoUrl);
+
+    // now pass this uri to the operating system
+    this._launchExternalUrl(uri);
+  },
+
+  // a generic method which can be used to pass arbitrary urls to the operating
+  // system.
+  // aURL --> a nsIURI which represents the url to launch
+  _launchExternalUrl: function (aURL) {
+    var extProtocolSvc =
+       Cc["@mozilla.org/uriloader/external-protocol-service;1"]
+         .getService(Ci.nsIExternalProtocolService);
+    if (extProtocolSvc)
+      extProtocolSvc.loadUrl(aURL);
+  }
+};
+
+function BrowserOpenAddonsMgr(aView) {
+  return new Promise(resolve => {
+    if (aView) {
+      let emWindow;
+      let browserWindow;
+
+      var receivePong = function receivePong(aSubject, aTopic, aData) {
+        let browserWin = aSubject.QueryInterface(Ci.nsIInterfaceRequestor)
+                                 .getInterface(Ci.nsIWebNavigation)
+                                 .QueryInterface(Ci.nsIDocShellTreeItem)
+                                 .rootTreeItem
+                                 .QueryInterface(Ci.nsIInterfaceRequestor)
+                                 .getInterface(Ci.nsIDOMWindow);
+        if (!emWindow || browserWin == window /* favor the current window */) {
+          emWindow = aSubject;
+          browserWindow = browserWin;
+        }
+      }
+      Services.obs.addObserver(receivePong, "EM-pong", false);
+      Services.obs.notifyObservers(null, "EM-ping", "");
+      Services.obs.removeObserver(receivePong, "EM-pong");
+
+      if (emWindow) {
+        emWindow.loadView(aView);
+        browserWindow.gBrowser.selectedTab =
+          browserWindow.gBrowser._getTabForContentWindow(emWindow);
+        emWindow.focus();
+        resolve(emWindow);
+        return;
+      }
+    }
+
+    switchToTabHavingURI("about:addons", true);
+
+    if (aView) {
+      // This must be a new load, else the ping/pong would have
+      // found the window above.
+      Services.obs.addObserver(function observer(aSubject, aTopic, aData) {
+        Services.obs.removeObserver(observer, aTopic);
+        aSubject.loadView(aView);
+        resolve(aSubject);
+      }, "EM-loaded", false);
+    } else {
+      resolve();
+    }
+  });
+}
+
+function AddKeywordForSearchField() {
+  let mm = gBrowser.selectedBrowser.messageManager;
+
+  let onMessage = (message) => {
+    mm.removeMessageListener("ContextMenu:SearchFieldBookmarkData:Result", onMessage);
+
+    let bookmarkData = message.data;
+    let title = gNavigatorBundle.getFormattedString("addKeywordTitleAutoFill",
+                                                    [bookmarkData.title]);
+    PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                     , type: "bookmark"
+                                     , uri: makeURI(bookmarkData.spec)
+                                     , title: title
+                                     , description: bookmarkData.description
+                                     , keyword: ""
+                                     , postData: bookmarkData.postData
+                                     , charSet: bookmarkData.charset
+                                     , hiddenRows: [ "location"
+                                                   , "description"
+                                                   , "tags"
+                                                   , "loadInSidebar" ]
+                                     }, window);
+  }
+  mm.addMessageListener("ContextMenu:SearchFieldBookmarkData:Result", onMessage);
+
+  mm.sendAsyncMessage("ContextMenu:SearchFieldBookmarkData", {}, { target: gContextMenu.target });
+}
+
+/**
+ * Re-open a closed tab.
+ * @param aIndex
+ *        The index of the tab (via SessionStore.getClosedTabData)
+ * @returns a reference to the reopened tab.
+ */
+function undoCloseTab(aIndex) {
+  // wallpaper patch to prevent an unnecessary blank tab (bug 343895)
+  var blankTabToRemove = null;
+  if (gBrowser.tabs.length == 1 && isTabEmpty(gBrowser.selectedTab))
+    blankTabToRemove = gBrowser.selectedTab;
+
+  var tab = null;
+  if (SessionStore.getClosedTabCount(window) > (aIndex || 0)) {
+    tab = SessionStore.undoCloseTab(window, aIndex || 0);
+
+    if (blankTabToRemove)
+      gBrowser.removeTab(blankTabToRemove);
+  }
+
+  return tab;
+}
+
+/**
+ * Re-open a closed window.
+ * @param aIndex
+ *        The index of the window (via SessionStore.getClosedWindowData)
+ * @returns a reference to the reopened window.
+ */
+function undoCloseWindow(aIndex) {
+  let window = null;
+  if (SessionStore.getClosedWindowCount() > (aIndex || 0))
+    window = SessionStore.undoCloseWindow(aIndex || 0);
+
+  return window;
+}
+
+/*
+ * Determines if a tab is "empty", usually used in the context of determining
+ * if it's ok to close the tab.
+ */
+function isTabEmpty(aTab) {
+  if (aTab.hasAttribute("busy"))
+    return false;
+
+  if (aTab.hasAttribute("customizemode"))
+    return false;
+
+  let browser = aTab.linkedBrowser;
+  if (!isBlankPageURL(browser.currentURI.spec))
+    return false;
+
+  if (!checkEmptyPageOrigin(browser))
+    return false;
+
+  if (browser.canGoForward || browser.canGoBack)
+    return false;
+
+  return true;
+}
+
+/**
+ * Check whether a page can be considered as 'empty', that its URI
+ * reflects its origin, and that if it's loaded in a tab, that tab
+ * could be considered 'empty' (e.g. like the result of opening
+ * a 'blank' new tab).
+ *
+ * We have to do more than just check the URI, because especially
+ * for things like about:blank, it is possible that the opener or
+ * some other page has control over the contents of the page.
+ *
+ * @param browser {Browser}
+ *        The browser whose page we're checking (the selected browser
+ *        in this window if omitted).
+ * @param uri {nsIURI}
+ *        The URI against which we're checking (the browser's currentURI
+ *        if omitted).
+ *
+ * @return false if the page was opened by or is controlled by arbitrary web
+ *         content, unless that content corresponds with the URI.
+ *         true if the page is blank and controlled by a principal matching
+ *         that URI (or the system principal if the principal has no URI)
+ */
+function checkEmptyPageOrigin(browser = gBrowser.selectedBrowser,
+                              uri = browser.currentURI) {
+  // If another page opened this page with e.g. window.open, this page might
+  // be controlled by its opener - return false.
+  if (browser.hasContentOpener) {
+    return false;
+  }
+  let contentPrincipal = browser.contentPrincipal;
+  // Not all principals have URIs...
+  if (contentPrincipal.URI) {
+    // There are two specialcases involving about:blank. One is where
+    // the user has manually loaded it and it got created with a null
+    // principal. The other involves the case where we load
+    // some other empty page in a browser and the current page is the
+    // initial about:blank page (which has that as its principal, not
+    // just URI in which case it could be web-based). Especially in
+    // e10s, we need to tackle that case specifically to avoid race
+    // conditions when updating the URL bar.
+    if ((uri.spec == "about:blank" && contentPrincipal.isNullPrincipal) ||
+        contentPrincipal.URI.spec == "about:blank") {
+      return true;
+    }
+    return contentPrincipal.URI.equals(uri);
+  }
+  // ... so for those that don't have them, enforce that the page has the
+  // system principal (this matches e.g. on about:newtab).
+  let ssm = Services.scriptSecurityManager;
+  return ssm.isSystemPrincipal(contentPrincipal);
+}
+
+function BrowserOpenSyncTabs() {
+  gSyncUI.openSyncedTabsPanel();
+}
+
+/**
+ * Format a URL
+ * eg:
+ * echo formatURL("https://addons.mozilla.org/%LOCALE%/%APP%/%VERSION%/");
+ * > https://addons.mozilla.org/en-US/firefox/3.0a1/
+ *
+ * Currently supported built-ins are LOCALE, APP, and any value from nsIXULAppInfo, uppercased.
+ */
+function formatURL(aFormat, aIsPref) {
+  var formatter = Cc["@mozilla.org/toolkit/URLFormatterService;1"].getService(Ci.nsIURLFormatter);
+  return aIsPref ? formatter.formatURLPref(aFormat) : formatter.formatURL(aFormat);
+}
+
+/**
+ * Utility object to handle manipulations of the identity indicators in the UI
+ */
+var gIdentityHandler = {
+  /**
+   * nsIURI for which the identity UI is displayed. This has been already
+   * processed by nsIURIFixup.createExposableURI.
+   */
+  _uri: null,
+
+  /**
+   * We only know the connection type if this._uri has a defined "host" part.
+   *
+   * These URIs, like "about:" and "data:" URIs, will usually be treated as a
+   * non-secure connection, unless they refer to an internally implemented
+   * browser page or resolve to "file:" URIs.
+   */
+  _uriHasHost: false,
+
+  /**
+   * Whether this._uri refers to an internally implemented browser page.
+   *
+   * Note that this is set for some "about:" pages, but general "chrome:" URIs
+   * are not included in this category by default.
+   */
+  _isSecureInternalUI: false,
+
+  /**
+   * nsISSLStatus metadata provided by gBrowser.securityUI the last time the
+   * identity UI was updated, or null if the connection is not secure.
+   */
+  _sslStatus: null,
+
+  /**
+   * Bitmask provided by nsIWebProgressListener.onSecurityChange.
+   */
+  _state: 0,
+
+  /**
+   * This flag gets set if the identity popup was opened by a keypress,
+   * to be able to focus it on the popupshown event.
+   */
+  _popupTriggeredByKeyboard: false,
+
+  /**
+   * Whether a permission is just removed from permission list.
+   */
+  _permissionJustRemoved: false,
+
+  get _isBroken() {
+    return this._state & Ci.nsIWebProgressListener.STATE_IS_BROKEN;
+  },
+
+  get _isSecure() {
+    // If a <browser> is included within a chrome document, then this._state
+    // will refer to the security state for the <browser> and not the top level
+    // document. In this case, don't upgrade the security state in the UI
+    // with the secure state of the embedded <browser>.
+    return !this._isURILoadedFromFile && this._state & Ci.nsIWebProgressListener.STATE_IS_SECURE;
+  },
+
+  get _isEV() {
+    // If a <browser> is included within a chrome document, then this._state
+    // will refer to the security state for the <browser> and not the top level
+    // document. In this case, don't upgrade the security state in the UI
+    // with the EV state of the embedded <browser>.
+    return !this._isURILoadedFromFile && this._state & Ci.nsIWebProgressListener.STATE_IDENTITY_EV_TOPLEVEL;
+  },
+
+  get _isMixedActiveContentLoaded() {
+    return this._state & Ci.nsIWebProgressListener.STATE_LOADED_MIXED_ACTIVE_CONTENT;
+  },
+
+  get _isMixedActiveContentBlocked() {
+    return this._state & Ci.nsIWebProgressListener.STATE_BLOCKED_MIXED_ACTIVE_CONTENT;
+  },
+
+  get _isMixedPassiveContentLoaded() {
+    return this._state & Ci.nsIWebProgressListener.STATE_LOADED_MIXED_DISPLAY_CONTENT;
+  },
+
+  get _isCertUserOverridden() {
+    return this._state & Ci.nsIWebProgressListener.STATE_CERT_USER_OVERRIDDEN;
+  },
+
+  get _hasInsecureLoginForms() {
+    // checks if the page has been flagged for an insecure login. Also checks
+    // if the pref to degrade the UI is set to true
+    return LoginManagerParent.hasInsecureLoginForms(gBrowser.selectedBrowser) &&
+           Services.prefs.getBoolPref("security.insecure_password.ui.enabled");
+  },
+
+  // smart getters
+  get _identityPopup () {
+    delete this._identityPopup;
+    return this._identityPopup = document.getElementById("identity-popup");
+  },
+  get _identityBox () {
+    delete this._identityBox;
+    return this._identityBox = document.getElementById("identity-box");
+  },
+  get _identityPopupMultiView () {
+    delete _identityPopupMultiView;
+    return document.getElementById("identity-popup-multiView");
+  },
+  get _identityPopupContentHosts () {
+    delete this._identityPopupContentHosts;
+    let selector = ".identity-popup-headline.host";
+    return this._identityPopupContentHosts = [
+      ...this._identityPopupMultiView._mainView.querySelectorAll(selector),
+      ...document.querySelectorAll(selector)
+    ];
+  },
+  get _identityPopupContentHostless () {
+    delete this._identityPopupContentHostless;
+    let selector = ".identity-popup-headline.hostless";
+    return this._identityPopupContentHostless = [
+      ...this._identityPopupMultiView._mainView.querySelectorAll(selector),
+      ...document.querySelectorAll(selector)
+    ];
+  },
+  get _identityPopupContentOwner () {
+    delete this._identityPopupContentOwner;
+    return this._identityPopupContentOwner =
+      document.getElementById("identity-popup-content-owner");
+  },
+  get _identityPopupContentSupp () {
+    delete this._identityPopupContentSupp;
+    return this._identityPopupContentSupp =
+      document.getElementById("identity-popup-content-supplemental");
+  },
+  get _identityPopupContentVerif () {
+    delete this._identityPopupContentVerif;
+    return this._identityPopupContentVerif =
+      document.getElementById("identity-popup-content-verifier");
+  },
+  get _identityPopupMixedContentLearnMore () {
+    delete this._identityPopupMixedContentLearnMore;
+    return this._identityPopupMixedContentLearnMore =
+      document.getElementById("identity-popup-mcb-learn-more");
+  },
+  get _identityPopupInsecureLoginFormsLearnMore () {
+    delete this._identityPopupInsecureLoginFormsLearnMore;
+    return this._identityPopupInsecureLoginFormsLearnMore =
+      document.getElementById("identity-popup-insecure-login-forms-learn-more");
+  },
+  get _identityIconLabels () {
+    delete this._identityIconLabels;
+    return this._identityIconLabels = document.getElementById("identity-icon-labels");
+  },
+  get _identityIconLabel () {
+    delete this._identityIconLabel;
+    return this._identityIconLabel = document.getElementById("identity-icon-label");
+  },
+  get _connectionIcon () {
+    delete this._connectionIcon;
+    return this._connectionIcon = document.getElementById("connection-icon");
+  },
+  get _overrideService () {
+    delete this._overrideService;
+    return this._overrideService = Cc["@mozilla.org/security/certoverride;1"]
+                                     .getService(Ci.nsICertOverrideService);
+  },
+  get _identityIconCountryLabel () {
+    delete this._identityIconCountryLabel;
+    return this._identityIconCountryLabel = document.getElementById("identity-icon-country-label");
+  },
+  get _identityIcon () {
+    delete this._identityIcon;
+    return this._identityIcon = document.getElementById("identity-icon");
+  },
+  get _permissionList () {
+    delete this._permissionList;
+    return this._permissionList = document.getElementById("identity-popup-permission-list");
+  },
+  get _permissionEmptyHint() {
+    delete this._permissionEmptyHint;
+    return this._permissionEmptyHint = document.getElementById("identity-popup-permission-empty-hint");
+  },
+  get _permissionReloadHint () {
+    delete this._permissionReloadHint;
+    return this._permissionReloadHint = document.getElementById("identity-popup-permission-reload-hint");
+  },
+  get _permissionAnchors () {
+    delete this._permissionAnchors;
+    let permissionAnchors = {};
+    for (let anchor of document.getElementById("blocked-permissions-container").children) {
+      permissionAnchors[anchor.getAttribute("data-permission-id")] = anchor;
+    }
+    return this._permissionAnchors = permissionAnchors;
+  },
+
+  /**
+   * Handler for mouseclicks on the "More Information" button in the
+   * "identity-popup" panel.
+   */
+  handleMoreInfoClick : function(event) {
+    displaySecurityInfo();
+    event.stopPropagation();
+    this._identityPopup.hidePopup();
+  },
+
+  toggleSubView(name, anchor) {
+    let view = this._identityPopupMultiView;
+    if (view.showingSubView) {
+      view.showMainView();
+    } else {
+      view.showSubView(`identity-popup-${name}View`, anchor);
+    }
+
+    // If an element is focused that's not the anchor, clear the focus.
+    // Elements of hidden views have -moz-user-focus:ignore but setting that
+    // per CSS selector doesn't blur a focused element in those hidden views.
+    if (Services.focus.focusedElement != anchor) {
+      Services.focus.clearFocus(window);
+    }
+  },
+
+  disableMixedContentProtection() {
+    // Use telemetry to measure how often unblocking happens
+    const kMIXED_CONTENT_UNBLOCK_EVENT = 2;
+    let histogram =
+      Services.telemetry.getHistogramById(
+        "MIXED_CONTENT_UNBLOCK_COUNTER");
+    histogram.add(kMIXED_CONTENT_UNBLOCK_EVENT);
+    // Reload the page with the content unblocked
+    BrowserReloadWithFlags(
+      Ci.nsIWebNavigation.LOAD_FLAGS_ALLOW_MIXED_CONTENT);
+    this._identityPopup.hidePopup();
+  },
+
+  enableMixedContentProtection() {
+    gBrowser.selectedBrowser.messageManager.sendAsyncMessage(
+      "MixedContent:ReenableProtection", {});
+    BrowserReload();
+    this._identityPopup.hidePopup();
+  },
+
+  removeCertException() {
+    if (!this._uriHasHost) {
+      Cu.reportError("Trying to revoke a cert exception on a URI without a host?");
+      return;
+    }
+    let host = this._uri.host;
+    let port = this._uri.port > 0 ? this._uri.port : 443;
+    this._overrideService.clearValidityOverride(host, port);
+    BrowserReloadSkipCache();
+    this._identityPopup.hidePopup();
+  },
+
+  /**
+   * Helper to parse out the important parts of _sslStatus (of the SSL cert in
+   * particular) for use in constructing identity UI strings
+  */
+  getIdentityData : function() {
+    var result = {};
+    var cert = this._sslStatus.serverCert;
+
+    // Human readable name of Subject
+    result.subjectOrg = cert.organization;
+
+    // SubjectName fields, broken up for individual access
+    if (cert.subjectName) {
+      result.subjectNameFields = {};
+      cert.subjectName.split(",").forEach(function(v) {
+        var field = v.split("=");
+        this[field[0]] = field[1];
+      }, result.subjectNameFields);
+
+      // Call out city, state, and country specifically
+      result.city = result.subjectNameFields.L;
+      result.state = result.subjectNameFields.ST;
+      result.country = result.subjectNameFields.C;
+    }
+
+    // Human readable name of Certificate Authority
+    result.caOrg =  cert.issuerOrganization || cert.issuerCommonName;
+    result.cert = cert;
+
+    return result;
+  },
+
+  /**
+   * Update the identity user interface for the page currently being displayed.
+   *
+   * This examines the SSL certificate metadata, if available, as well as the
+   * connection type and other security-related state information for the page.
+   *
+   * @param state
+   *        Bitmask provided by nsIWebProgressListener.onSecurityChange.
+   * @param uri
+   *        nsIURI for which the identity UI should be displayed, already
+   *        processed by nsIURIFixup.createExposableURI.
+   */
+  updateIdentity(state, uri) {
+    let shouldHidePopup = this._uri && (this._uri.spec != uri.spec);
+    this._state = state;
+
+    // Firstly, populate the state properties required to display the UI. See
+    // the documentation of the individual properties for details.
+    this.setURI(uri);
+    this._sslStatus = gBrowser.securityUI
+                              .QueryInterface(Ci.nsISSLStatusProvider)
+                              .SSLStatus;
+    if (this._sslStatus) {
+      this._sslStatus.QueryInterface(Ci.nsISSLStatus);
+    }
+
+    // Then, update the user interface with the available data.
+    this.refreshIdentityBlock();
+    // Handle a location change while the Control Center is focused
+    // by closing the popup (bug 1207542)
+    if (shouldHidePopup) {
+      this._identityPopup.hidePopup();
+    }
+    this.showWeakCryptoInfoBar();
+
+    // NOTE: We do NOT update the identity popup (the control center) when
+    // we receive a new security state on the existing page (i.e. from a
+    // subframe). If the user opened the popup and looks at the provided
+    // information we don't want to suddenly change the panel contents.
+  },
+
+  /**
+   * This is called asynchronously when requested by the Logins module, after
+   * the insecure login forms state for the page has been updated.
+   */
+  refreshForInsecureLoginForms() {
+    // Check this._uri because we don't want to refresh the user interface if
+    // this is called before the first page load in the window for any reason.
+    if (!this._uri) {
+      Cu.reportError("Unexpected early call to refreshForInsecureLoginForms.");
+      return;
+    }
+    this.refreshIdentityBlock();
+  },
+
+  updateSharingIndicator() {
+    let tab = gBrowser.selectedTab;
+    let sharing = tab.getAttribute("sharing");
+    if (sharing)
+      this._identityBox.setAttribute("sharing", sharing);
+    else
+      this._identityBox.removeAttribute("sharing");
+
+    this._sharingState = tab._sharingState;
+
+    if (this._identityPopup.state == "open") {
+      this._handleHeightChange(() => this.updateSitePermissions());
+    }
+  },
+
+  /**
+   * Attempt to provide proper IDN treatment for host names
+   */
+  getEffectiveHost: function() {
+    if (!this._IDNService)
+      this._IDNService = Cc["@mozilla.org/network/idn-service;1"]
+                         .getService(Ci.nsIIDNService);
+    try {
+      return this._IDNService.convertToDisplayIDN(this._uri.host, {});
+    } catch (e) {
+      // If something goes wrong (e.g. host is an IP address) just fail back
+      // to the full domain.
+      return this._uri.host;
+    }
+  },
+
+  /**
+   * Return the CSS class name to set on the "fullscreen-warning" element to
+   * display information about connection security in the notification shown
+   * when a site enters the fullscreen mode.
+   */
+  get pointerlockFsWarningClassName() {
+    // Note that the fullscreen warning does not handle _isSecureInternalUI.
+    if (this._uriHasHost && this._isEV) {
+      return "verifiedIdentity";
+    }
+    if (this._uriHasHost && this._isSecure) {
+      return "verifiedDomain";
+    }
+    return "unknownIdentity";
+  },
+
+  /**
+   * Updates the identity block user interface with the data from this object.
+   */
+  refreshIdentityBlock() {
+    if (!this._identityBox) {
+      return;
+    }
+
+    let icon_label = "";
+    let tooltip = "";
+    let icon_country_label = "";
+    let icon_labels_dir = "ltr";
+
+    if (this._isSecureInternalUI) {
+      this._identityBox.className = "chromeUI";
+      let brandBundle = document.getElementById("bundle_brand");
+      icon_label = brandBundle.getString("brandShorterName");
+    } else if (this._uriHasHost && this._isEV) {
+      this._identityBox.className = "verifiedIdentity";
+      if (this._isMixedActiveContentBlocked) {
+        this._identityBox.classList.add("mixedActiveBlocked");
+      }
+
+      if (!this._isCertUserOverridden) {
+        // If it's identified, then we can populate the dialog with credentials
+        let iData = this.getIdentityData();
+        tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
+                                                      [iData.caOrg]);
+        icon_label = iData.subjectOrg;
+        if (iData.country)
+          icon_country_label = "(" + iData.country + ")";
+
+        // If the organization name starts with an RTL character, then
+        // swap the positions of the organization and country code labels.
+        // The Unicode ranges reflect the definition of the UCS2_CHAR_IS_BIDI
+        // macro in intl/unicharutil/util/nsBidiUtils.h. When bug 218823 gets
+        // fixed, this test should be replaced by one adhering to the
+        // Unicode Bidirectional Algorithm proper (at the paragraph level).
+        icon_labels_dir = /^[\u0590-\u08ff\ufb1d-\ufdff\ufe70-\ufefc]/.test(icon_label) ?
+                          "rtl" : "ltr";
+      }
+
+    } else if (this._uriHasHost && this._isSecure) {
+      this._identityBox.className = "verifiedDomain";
+      if (this._isMixedActiveContentBlocked) {
+        this._identityBox.classList.add("mixedActiveBlocked");
+      }
+      if (!this._isCertUserOverridden) {
+        // It's a normal cert, verifier is the CA Org.
+        tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
+                                                      [this.getIdentityData().caOrg]);
+      }
+    } else {
+      this._identityBox.className = "unknownIdentity";
+      if (this._isBroken) {
+        if (this._isMixedActiveContentLoaded) {
+          this._identityBox.classList.add("mixedActiveContent");
+        } else if (this._isMixedActiveContentBlocked) {
+          this._identityBox.classList.add("mixedDisplayContentLoadedActiveBlocked");
+        } else if (this._isMixedPassiveContentLoaded) {
+          this._identityBox.classList.add("mixedDisplayContent");
+        } else {
+          this._identityBox.classList.add("weakCipher");
+        }
+      }
+      if (this._hasInsecureLoginForms) {
+        // Insecure login forms can only be present on "unknown identity"
+        // pages, either already insecure or with mixed active content loaded.
+        this._identityBox.classList.add("insecureLoginForms");
+      }
+    }
+
+    if (this._isCertUserOverridden) {
+      this._identityBox.classList.add("certUserOverridden");
+      // Cert is trusted because of a security exception, verifier is a special string.
+      tooltip = gNavigatorBundle.getString("identity.identified.verified_by_you");
+    }
+
+    let permissionAnchors = this._permissionAnchors;
+
+    // hide all permission icons
+    for (let icon of Object.values(permissionAnchors)) {
+      icon.removeAttribute("showing");
+    }
+
+    // keeps track if we should show an indicator that there are active permissions
+    let hasGrantedPermissions = false;
+
+    // show permission icons
+    for (let permission of SitePermissions.getAllByURI(this._uri)) {
+      if (permission.state === SitePermissions.BLOCK) {
+
+        let icon = permissionAnchors[permission.id];
+        if (icon) {
+          icon.setAttribute("showing", "true");
+        }
+
+      } else if (permission.state === SitePermissions.ALLOW ||
+                 permission.state === SitePermissions.SESSION) {
+        hasGrantedPermissions = true;
+      }
+    }
+
+    if (hasGrantedPermissions) {
+      this._identityBox.classList.add("grantedPermissions");
+    }
+
+    // Push the appropriate strings out to the UI
+    this._connectionIcon.tooltipText = tooltip;
+    this._identityIconLabels.tooltipText = tooltip;
+    this._identityIcon.tooltipText = gNavigatorBundle.getString("identity.icon.tooltip");
+    this._identityIconLabel.value = icon_label;
+    this._identityIconCountryLabel.value = icon_country_label;
+    // Set cropping and direction
+    this._identityIconLabel.crop = icon_country_label ? "end" : "center";
+    this._identityIconLabel.parentNode.style.direction = icon_labels_dir;
+    // Hide completely if the organization label is empty
+    this._identityIconLabel.parentNode.collapsed = icon_label ? false : true;
+  },
+
+  /**
+   * Show the weak crypto notification bar.
+   */
+  showWeakCryptoInfoBar() {
+    if (!this._uriHasHost || !this._isBroken || !this._sslStatus.cipherName ||
+        this._sslStatus.cipherName.indexOf("_RC4_") < 0) {
+      return;
+    }
+
+    let notificationBox = gBrowser.getNotificationBox();
+    let notification = notificationBox.getNotificationWithValue("weak-crypto");
+    if (notification) {
+      return;
+    }
+
+    let brandBundle = document.getElementById("bundle_brand");
+    let brandShortName = brandBundle.getString("brandShortName");
+    let message = gNavigatorBundle.getFormattedString("weakCryptoOverriding.message",
+                                                      [brandShortName]);
+
+    let host = this._uri.host;
+    let port = 443;
+    try {
+      if (this._uri.port > 0) {
+        port = this._uri.port;
+      }
+    } catch (e) {}
+
+    let buttons = [{
+      label: gNavigatorBundle.getString("revokeOverride.label"),
+      accessKey: gNavigatorBundle.getString("revokeOverride.accesskey"),
+      callback: function (aNotification, aButton) {
+        try {
+          let weakCryptoOverride = Cc["@mozilla.org/security/weakcryptooverride;1"]
+                                     .getService(Ci.nsIWeakCryptoOverride);
+          weakCryptoOverride.removeWeakCryptoOverride(host, port,
+            PrivateBrowsingUtils.isBrowserPrivate(gBrowser.selectedBrowser));
+          BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE);
+        } catch (e) {
+          Cu.reportError(e);
+        }
+      }
+    }];
+
+    const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
+    notificationBox.appendNotification(message, "weak-crypto", null,
+                                       priority, buttons);
+  },
+
+  /**
+   * Set up the title and content messages for the identity message popup,
+   * based on the specified mode, and the details of the SSL cert, where
+   * applicable
+   */
+  refreshIdentityPopup() {
+    // Update "Learn More" for Mixed Content Blocking and Insecure Login Forms.
+    let baseURL = Services.urlFormatter.formatURLPref("app.support.baseURL");
+    this._identityPopupMixedContentLearnMore
+        .setAttribute("href", baseURL + "mixed-content");
+    this._identityPopupInsecureLoginFormsLearnMore
+        .setAttribute("href", baseURL + "insecure-password");
+
+    // Determine connection security information.
+    let connection = "not-secure";
+    if (this._isSecureInternalUI) {
+      connection = "chrome";
+    } else if (this._isURILoadedFromFile) {
+      connection = "file";
+    } else if (this._isEV) {
+      connection = "secure-ev";
+    } else if (this._isCertUserOverridden) {
+      connection = "secure-cert-user-overridden";
+    } else if (this._isSecure) {
+      connection = "secure";
+    }
+
+    // Determine if there are insecure login forms.
+    let loginforms = "secure";
+    if (this._hasInsecureLoginForms) {
+      loginforms = "insecure";
+    }
+
+    // Determine the mixed content state.
+    let mixedcontent = [];
+    if (this._isMixedPassiveContentLoaded) {
+      mixedcontent.push("passive-loaded");
+    }
+    if (this._isMixedActiveContentLoaded) {
+      mixedcontent.push("active-loaded");
+    } else if (this._isMixedActiveContentBlocked) {
+      mixedcontent.push("active-blocked");
+    }
+    mixedcontent = mixedcontent.join(" ");
+
+    // We have no specific flags for weak ciphers (yet). If a connection is
+    // broken and we can't detect any mixed content loaded then it's a weak
+    // cipher.
+    let ciphers = "";
+    if (this._isBroken && !this._isMixedActiveContentLoaded && !this._isMixedPassiveContentLoaded) {
+      ciphers = "weak";
+    }
+
+    // Update all elements.
+    let elementIDs = [
+      "identity-popup",
+      "identity-popup-securityView-body",
+    ];
+
+    function updateAttribute(elem, attr, value) {
+      if (value) {
+        elem.setAttribute(attr, value);
+      } else {
+        elem.removeAttribute(attr);
+      }
+    }
+
+    for (let id of elementIDs) {
+      let element = document.getElementById(id);
+      updateAttribute(element, "connection", connection);
+      updateAttribute(element, "loginforms", loginforms);
+      updateAttribute(element, "ciphers", ciphers);
+      updateAttribute(element, "mixedcontent", mixedcontent);
+      updateAttribute(element, "isbroken", this._isBroken);
+    }
+
+    // Initialize the optional strings to empty values
+    let supplemental = "";
+    let verifier = "";
+    let host = "";
+    let owner = "";
+    let hostless = false;
+
+    try {
+      host = this.getEffectiveHost();
+    } catch (e) {
+      // Some URIs might have no hosts.
+    }
+
+    // Fallback for special protocols.
+    if (!host) {
+      host = this._uri.specIgnoringRef;
+      // Special URIs without a host (eg, about:) should crop the end so
+      // the protocol can be seen.
+      hostless = true;
+    }
+
+    // Fill in the CA name if we have a valid TLS certificate.
+    if (this._isSecure || this._isCertUserOverridden) {
+      verifier = this._identityIconLabels.tooltipText;
+    }
+
+    // Fill in organization information if we have a valid EV certificate.
+    if (this._isEV) {
+      let iData = this.getIdentityData();
+      host = owner = iData.subjectOrg;
+      verifier = this._identityIconLabels.tooltipText;
+
+      // Build an appropriate supplemental block out of whatever location data we have
+      if (iData.city)
+        supplemental += iData.city + "\n";
+      if (iData.state && iData.country)
+        supplemental += gNavigatorBundle.getFormattedString("identity.identified.state_and_country",
+                                                            [iData.state, iData.country]);
+      else if (iData.state) // State only
+        supplemental += iData.state;
+      else if (iData.country) // Country only
+        supplemental += iData.country;
+    }
+
+    // Push the appropriate strings out to the UI.
+    this._identityPopupContentHosts.forEach((el) => {
+      el.textContent = host;
+      el.hidden = hostless;
+    });
+    this._identityPopupContentHostless.forEach((el) => {
+      el.setAttribute("value", host);
+      el.hidden = !hostless;
+    });
+    this._identityPopupContentOwner.textContent = owner;
+    this._identityPopupContentSupp.textContent = supplemental;
+    this._identityPopupContentVerif.textContent = verifier;
+
+    // Update per-site permissions section.
+    this.updateSitePermissions();
+  },
+
+  setURI(uri) {
+    this._uri = uri;
+
+    try {
+      this._uri.host;
+      this._uriHasHost = true;
+    } catch (ex) {
+      this._uriHasHost = false;
+    }
+
+    let whitelist = /^(?:accounts|addons|cache|config|crashes|customizing|downloads|healthreport|home|license|newaddon|permissions|preferences|privatebrowsing|rights|searchreset|sessionrestore|support|welcomeback)(?:[?#]|$)/i;
+    this._isSecureInternalUI = uri.schemeIs("about") && whitelist.test(uri.path);
+
+    // Create a channel for the sole purpose of getting the resolved URI
+    // of the request to determine if it's loaded from the file system.
+    this._isURILoadedFromFile = false;
+    let chanOptions = {uri: this._uri, loadUsingSystemPrincipal: true};
+    let resolvedURI;
+    try {
+      resolvedURI = NetUtil.newChannel(chanOptions).URI;
+      if (resolvedURI.schemeIs("jar")) {
+        // Given a URI "jar:<jar-file-uri>!/<jar-entry>"
+        // create a new URI using <jar-file-uri>!/<jar-entry>
+        resolvedURI = NetUtil.newURI(resolvedURI.path);
+      }
+      // Check the URI again after resolving.
+      this._isURILoadedFromFile = resolvedURI.schemeIs("file");
+    } catch (ex) {
+      // NetUtil's methods will throw for malformed URIs and the like
+    }
+  },
+
+  /**
+   * Click handler for the identity-box element in primary chrome.
+   */
+  handleIdentityButtonEvent : function(event) {
+    event.stopPropagation();
+
+    if ((event.type == "click" && event.button != 0) ||
+        (event.type == "keypress" && event.charCode != KeyEvent.DOM_VK_SPACE &&
+         event.keyCode != KeyEvent.DOM_VK_RETURN)) {
+      return; // Left click, space or enter only
+    }
+
+    // Don't allow left click, space or enter if the location has been modified.
+    if (gURLBar.getAttribute("pageproxystate") != "valid") {
+      return;
+    }
+
+    this._popupTriggeredByKeyboard = event.type == "keypress";
+
+    // Make sure that the display:none style we set in xul is removed now that
+    // the popup is actually needed
+    this._identityPopup.hidden = false;
+
+    // Update the popup strings
+    this.refreshIdentityPopup();
+
+    // Add the "open" attribute to the identity box for styling
+    this._identityBox.setAttribute("open", "true");
+
+    // Now open the popup, anchored off the primary chrome element
+    this._identityPopup.openPopup(this._identityIcon, "bottomcenter topleft");
+  },
+
+  onPopupShown(event) {
+    if (event.target == this._identityPopup) {
+      if (this._popupTriggeredByKeyboard) {
+        // Move focus to the next available element in the identity popup.
+        // This is required by role=alertdialog and fixes an issue where
+        // an already open panel would steal focus from the identity popup.
+        document.commandDispatcher.advanceFocusIntoSubtree(this._identityPopup);
+      }
+
+      window.addEventListener("focus", this, true);
+    }
+  },
+
+  onPopupHidden(event) {
+    if (event.target == this._identityPopup) {
+      window.removeEventListener("focus", this, true);
+      this._identityBox.removeAttribute("open");
+    }
+  },
+
+  handleEvent(event) {
+    let elem = document.activeElement;
+    let position = elem.compareDocumentPosition(this._identityPopup);
+
+    if (!(position & (Node.DOCUMENT_POSITION_CONTAINS |
+                      Node.DOCUMENT_POSITION_CONTAINED_BY)) &&
+        !this._identityPopup.hasAttribute("noautohide")) {
+      // Hide the panel when focusing an element that is
+      // neither an ancestor nor descendant unless the panel has
+      // @noautohide (e.g. for a tour).
+      this._identityPopup.hidePopup();
+    }
+  },
+
+  observe(subject, topic, data) {
+    if (topic == "perm-changed") {
+      this.refreshIdentityBlock();
+    }
+  },
+
+  onDragStart: function (event) {
+    if (gURLBar.getAttribute("pageproxystate") != "valid")
+      return;
+
+    let value = gBrowser.currentURI.spec;
+    let urlString = value + "\n" + gBrowser.contentTitle;
+    let htmlString = "<a href=\"" + value + "\">" + value + "</a>";
+
+    let dt = event.dataTransfer;
+    dt.setData("text/x-moz-url", urlString);
+    dt.setData("text/uri-list", value);
+    dt.setData("text/plain", value);
+    dt.setData("text/html", htmlString);
+    dt.setDragImage(this._identityIcon, 16, 16);
+  },
+
+  onLocationChange: function () {
+    this._permissionJustRemoved = false;
+    this.updatePermissionHint();
+  },
+
+  updatePermissionHint: function () {
+    if (!this._permissionList.hasChildNodes() && !this._permissionJustRemoved) {
+      this._permissionEmptyHint.removeAttribute("hidden");
+    } else {
+      this._permissionEmptyHint.setAttribute("hidden", "true");
+    }
+
+    if (this._permissionJustRemoved) {
+      this._permissionReloadHint.removeAttribute("hidden");
+    } else {
+      this._permissionReloadHint.setAttribute("hidden", "true");
+    }
+  },
+
+  updateSitePermissions: function () {
+    while (this._permissionList.hasChildNodes())
+      this._permissionList.removeChild(this._permissionList.lastChild);
+
+    let uri = gBrowser.currentURI;
+
+    let permissions = SitePermissions.getPermissionDetailsByURI(uri);
+    if (this._sharingState) {
+      // If WebRTC device or screen permissions are in use, we need to find
+      // the associated permission item to set the inUse field to true.
+      for (let id of ["camera", "microphone", "screen"]) {
+        if (this._sharingState[id]) {
+          let found = false;
+          for (let permission of permissions) {
+            if (permission.id != id)
+              continue;
+            found = true;
+            permission.inUse = true;
+            break;
+          }
+          if (!found) {
+            // If the permission item we were looking for doesn't exist,
+            // the user has temporarily allowed sharing and we need to add
+            // an item in the permissions array to reflect this.
+            let permission = SitePermissions.getPermissionItem(id);
+            permission.inUse = true;
+            permissions.push(permission);
+          }
+        }
+      }
+    }
+    for (let permission of permissions) {
+      let item = this._createPermissionItem(permission);
+      this._permissionList.appendChild(item);
+    }
+
+    this.updatePermissionHint();
+  },
+
+  _handleHeightChange: function(aFunction, aWillShowReloadHint) {
+    let heightBefore = getComputedStyle(this._permissionList).height;
+    aFunction();
+    let heightAfter = getComputedStyle(this._permissionList).height;
+    // Showing the reload hint increases the height, we need to account for it.
+    if (aWillShowReloadHint) {
+      heightAfter = parseInt(heightAfter) +
+                    parseInt(getComputedStyle(this._permissionList.nextSibling).height);
+    }
+    let heightChange = parseInt(heightAfter) - parseInt(heightBefore);
+    if (heightChange)
+      this._identityPopupMultiView.setHeightToFit(heightChange);
+  },
+
+  _createPermissionItem: function (aPermission) {
+    let container = document.createElement("hbox");
+    container.setAttribute("class", "identity-popup-permission-item");
+    container.setAttribute("align", "center");
+
+    let img = document.createElement("image");
+    let classes = "identity-popup-permission-icon " + aPermission.id + "-icon";
+    if (aPermission.state == SitePermissions.BLOCK)
+      classes += " blocked-permission-icon";
+    if (aPermission.inUse)
+      classes += " in-use";
+    img.setAttribute("class", classes);
+
+    let nameLabel = document.createElement("label");
+    nameLabel.setAttribute("flex", "1");
+    nameLabel.setAttribute("class", "identity-popup-permission-label");
+    nameLabel.textContent = SitePermissions.getPermissionLabel(aPermission.id);
+
+    let stateLabel = document.createElement("label");
+    stateLabel.setAttribute("flex", "1");
+    stateLabel.setAttribute("class", "identity-popup-permission-state-label");
+    stateLabel.textContent = SitePermissions.getStateLabel(
+      aPermission.id, aPermission.state, aPermission.inUse || false);
+
+    let button = document.createElement("button");
+    button.setAttribute("class", "identity-popup-permission-remove-button");
+    let tooltiptext = gNavigatorBundle.getString("permissions.remove.tooltip");
+    button.setAttribute("tooltiptext", tooltiptext);
+    button.addEventListener("command", () => {
+      this._handleHeightChange(() =>
+        this._permissionList.removeChild(container), !this._permissionJustRemoved);
+      if (aPermission.inUse &&
+          ["camera", "microphone", "screen"].includes(aPermission.id)) {
+        let windowId = this._sharingState.windowId;
+        if (aPermission.id == "screen") {
+          windowId = "screen:" + windowId;
+        } else {
+          // If we set persistent permissions or the sharing has
+          // started due to existing persistent permissions, we need
+          // to handle removing these even for frames with different hostnames.
+          let uris = gBrowser.selectedBrowser._devicePermissionURIs || [];
+          for (let uri of uris) {
+            // It's not possible to stop sharing one of camera/microphone
+            // without the other.
+            for (let id of ["camera", "microphone"]) {
+              if (this._sharingState[id] &&
+                  SitePermissions.get(uri, id) == SitePermissions.ALLOW)
+                SitePermissions.remove(uri, id);
+            }
+          }
+        }
+        let mm = gBrowser.selectedBrowser.messageManager;
+        mm.sendAsyncMessage("webrtc:StopSharing", windowId);
+      }
+      SitePermissions.remove(gBrowser.currentURI, aPermission.id);
+      this._permissionJustRemoved = true;
+      this.updatePermissionHint();
+
+      // Set telemetry values for clearing a permission
+      let histogram = Services.telemetry.getKeyedHistogramById("WEB_PERMISSION_CLEARED");
+
+      let permissionType = 0;
+      if (aPermission.state == SitePermissions.ALLOW) {
+        // 1 : clear permanently allowed permission
+        permissionType = 1;
+      } else if (aPermission.state == SitePermissions.BLOCK) {
+        // 2 : clear permanently blocked permission
+        permissionType = 2;
+      }
+      // 3 : TODO clear temporary allowed permission
+      // 4 : TODO clear temporary blocked permission
+
+      histogram.add("(all)", permissionType);
+      histogram.add(aPermission.id, permissionType);
+    });
+
+    container.appendChild(img);
+    container.appendChild(nameLabel);
+    container.appendChild(stateLabel);
+    container.appendChild(button);
+
+    return container;
+  }
+};
+
+function getNotificationBox(aWindow) {
+  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
+  if (foundBrowser)
+    return gBrowser.getNotificationBox(foundBrowser)
+  return null;
+}
+
+function getTabModalPromptBox(aWindow) {
+  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
+  if (foundBrowser)
+    return gBrowser.getTabModalPromptBox(foundBrowser);
+  return null;
+}
+
+/* DEPRECATED */
+function getBrowser() {
+  return gBrowser;
+}
+function getNavToolbox() {
+  return gNavToolbox;
+}
+
+var gPrivateBrowsingUI = {
+  init: function PBUI_init() {
+    // Do nothing for normal windows
+    if (!PrivateBrowsingUtils.isWindowPrivate(window)) {
+      return;
+    }
+
+    // Disable the Clear Recent History... menu item when in PB mode
+    // temporary fix until bug 463607 is fixed
+    document.getElementById("Tools:Sanitize").setAttribute("disabled", "true");
+
+    if (window.location.href == getBrowserURL()) {
+      // Adjust the window's title
+      let docElement = document.documentElement;
+      if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
+        docElement.setAttribute("title",
+          docElement.getAttribute("title_privatebrowsing"));
+        docElement.setAttribute("titlemodifier",
+          docElement.getAttribute("titlemodifier_privatebrowsing"));
+      }
+      docElement.setAttribute("privatebrowsingmode",
+        PrivateBrowsingUtils.permanentPrivateBrowsing ? "permanent" : "temporary");
+      gBrowser.updateTitlebar();
+
+      if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
+        // Adjust the New Window menu entries
+        [
+          { normal: "menu_newNavigator", private: "menu_newPrivateWindow" },
+        ].forEach(function(menu) {
+          let newWindow = document.getElementById(menu.normal);
+          let newPrivateWindow = document.getElementById(menu.private);
+          if (newWindow && newPrivateWindow) {
+            newPrivateWindow.hidden = true;
+            newWindow.label = newPrivateWindow.label;
+            newWindow.accessKey = newPrivateWindow.accessKey;
+            newWindow.command = newPrivateWindow.command;
+          }
+        });
+      }
+    }
+
+    let urlBarSearchParam = gURLBar.getAttribute("autocompletesearchparam") || "";
+    if (!PrivateBrowsingUtils.permanentPrivateBrowsing &&
+        !urlBarSearchParam.includes("disable-private-actions")) {
+      // Disable switch to tab autocompletion for private windows.
+      // We leave it enabled for permanent private browsing mode though.
+      urlBarSearchParam += " disable-private-actions";
+    }
+    if (!urlBarSearchParam.includes("private-window")) {
+      urlBarSearchParam += " private-window";
+    }
+    gURLBar.setAttribute("autocompletesearchparam", urlBarSearchParam);
+  }
+};
+
+var gRemoteTabsUI = {
+  init: function() {
+    if (window.location.href != getBrowserURL() &&
+        // Also check hidden window for the Mac no-window case
+        window.location.href != "chrome://browser/content/hiddenWindow.xul") {
+      return;
+    }
+
+    if (AppConstants.platform == "macosx" &&
+        Services.prefs.getBoolPref("layers.acceleration.disabled")) {
+      // On OS X, "Disable Hardware Acceleration" also disables OMTC and forces
+      // a fallback to Basic Layers. This is incompatible with e10s.
+      return;
+    }
+
+    let newNonRemoteWindow = document.getElementById("menu_newNonRemoteWindow");
+    let autostart = Services.appinfo.browserTabsRemoteAutostart;
+    newNonRemoteWindow.hidden = !autostart;
+  }
+};
+
+/**
+ * Switch to a tab that has a given URI, and focuses its browser window.
+ * If a matching tab is in this window, it will be switched to. Otherwise, other
+ * windows will be searched.
+ *
+ * @param aURI
+ *        URI to search for
+ * @param aOpenNew
+ *        True to open a new tab and switch to it, if no existing tab is found.
+ *        If no suitable window is found, a new one will be opened.
+ * @param aOpenParams
+ *        If switching to this URI results in us opening a tab, aOpenParams
+ *        will be the parameter object that gets passed to openUILinkIn. Please
+ *        see the documentation for openUILinkIn to see what parameters can be
+ *        passed via this object.
+ *        This object also allows:
+ *        - 'ignoreFragment' property to be set to true to exclude fragment-portion
+ *        matching when comparing URIs.
+ *          If set to "whenComparing", the fragment will be unmodified.
+ *          If set to "whenComparingAndReplace", the fragment will be replaced.
+ *        - 'ignoreQueryString' boolean property to be set to true to exclude query string
+ *        matching when comparing URIs.
+ *        - 'replaceQueryString' boolean property to be set to true to exclude query string
+ *        matching when comparing URIs and overwrite the initial query string with
+ *        the one from the new URI.
+ * @return True if an existing tab was found, false otherwise
+ */
+function switchToTabHavingURI(aURI, aOpenNew, aOpenParams={}) {
+  // Certain URLs can be switched to irrespective of the source or destination
+  // window being in private browsing mode:
+  const kPrivateBrowsingWhitelist = new Set([
+    "about:addons",
+  ]);
+
+  let ignoreFragment = aOpenParams.ignoreFragment;
+  let ignoreQueryString = aOpenParams.ignoreQueryString;
+  let replaceQueryString = aOpenParams.replaceQueryString;
+
+  // These properties are only used by switchToTabHavingURI and should
+  // not be used as a parameter for the new load.
+  delete aOpenParams.ignoreFragment;
+  delete aOpenParams.ignoreQueryString;
+  delete aOpenParams.replaceQueryString;
+
+  // This will switch to the tab in aWindow having aURI, if present.
+  function switchIfURIInWindow(aWindow) {
+    // Only switch to the tab if neither the source nor the destination window
+    // are private and they are not in permanent private browsing mode
+    if (!kPrivateBrowsingWhitelist.has(aURI.spec) &&
+        (PrivateBrowsingUtils.isWindowPrivate(window) ||
+         PrivateBrowsingUtils.isWindowPrivate(aWindow)) &&
+        !PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      return false;
+    }
+
+    // Remove the query string, fragment, both, or neither from a given url.
+    function cleanURL(url, removeQuery, removeFragment) {
+      let ret = url;
+      if (removeFragment) {
+        ret = ret.split("#")[0];
+        if (removeQuery) {
+          // This removes a query, if present before the fragment.
+          ret = ret.split("?")[0];
+        }
+      } else if (removeQuery) {
+        // This is needed in case there is a fragment after the query.
+        let fragment = ret.split("#")[1];
+        ret = ret.split("?")[0].concat(
+          (fragment != undefined) ? "#".concat(fragment) : "");
+      }
+      return ret;
+    }
+
+    // Need to handle nsSimpleURIs here too (e.g. about:...), which don't
+    // work correctly with URL objects - so treat them as strings
+    let ignoreFragmentWhenComparing = typeof ignoreFragment == "string" &&
+                                      ignoreFragment.startsWith("whenComparing");
+    let requestedCompare = cleanURL(
+        aURI.spec, ignoreQueryString || replaceQueryString, ignoreFragmentWhenComparing);
+    let browsers = aWindow.gBrowser.browsers;
+    for (let i = 0; i < browsers.length; i++) {
+      let browser = browsers[i];
+      let browserCompare = cleanURL(
+          browser.currentURI.spec, ignoreQueryString || replaceQueryString, ignoreFragmentWhenComparing);
+      if (requestedCompare == browserCompare) {
+        aWindow.focus();
+        if (ignoreFragment == "whenComparingAndReplace" || replaceQueryString) {
+          browser.loadURI(aURI.spec);
+        }
+        aWindow.gBrowser.tabContainer.selectedIndex = i;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  // This can be passed either nsIURI or a string.
+  if (!(aURI instanceof Ci.nsIURI))
+    aURI = Services.io.newURI(aURI, null, null);
+
+  let isBrowserWindow = !!window.gBrowser;
+
+  // Prioritise this window.
+  if (isBrowserWindow && switchIfURIInWindow(window))
+    return true;
+
+  for (let browserWin of browserWindows()) {
+    // Skip closed (but not yet destroyed) windows,
+    // and the current window (which was checked earlier).
+    if (browserWin.closed || browserWin == window)
+      continue;
+    if (switchIfURIInWindow(browserWin))
+      return true;
+  }
+
+  // No opened tab has that url.
+  if (aOpenNew) {
+    if (isBrowserWindow && isTabEmpty(gBrowser.selectedTab))
+      openUILinkIn(aURI.spec, "current", aOpenParams);
+    else
+      openUILinkIn(aURI.spec, "tab", aOpenParams);
+  }
+
+  return false;
+}
+
+var RestoreLastSessionObserver = {
+  init: function () {
+    if (SessionStore.canRestoreLastSession &&
+        !PrivateBrowsingUtils.isWindowPrivate(window)) {
+      Services.obs.addObserver(this, "sessionstore-last-session-cleared", true);
+      goSetCommandEnabled("Browser:RestoreLastSession", true);
+    }
+  },
+
+  observe: function () {
+    // The last session can only be restored once so there's
+    // no way we need to re-enable our menu item.
+    Services.obs.removeObserver(this, "sessionstore-last-session-cleared");
+    goSetCommandEnabled("Browser:RestoreLastSession", false);
+  },
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference])
+};
+
+function restoreLastSession() {
+  SessionStore.restoreLastSession();
+}
+
+var TabContextMenu = {
+  contextTab: null,
+  _updateToggleMuteMenuItem(aTab, aConditionFn) {
+    ["muted", "soundplaying"].forEach(attr => {
+      if (!aConditionFn || aConditionFn(attr)) {
+        if (aTab.hasAttribute(attr)) {
+          aTab.toggleMuteMenuItem.setAttribute(attr, "true");
+        } else {
+          aTab.toggleMuteMenuItem.removeAttribute(attr);
+        }
+      }
+    });
+  },
+  updateContextMenu: function updateContextMenu(aPopupMenu) {
+    this.contextTab = aPopupMenu.triggerNode.localName == "tab" ?
+                      aPopupMenu.triggerNode : gBrowser.selectedTab;
+    let disabled = gBrowser.tabs.length == 1;
+
+    var menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple");
+    for (let menuItem of menuItems)
+      menuItem.disabled = disabled;
+
+    if (AppConstants.E10S_TESTING_ONLY) {
+      menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-remote");
+      for (let menuItem of menuItems) {
+        menuItem.hidden = !gMultiProcessBrowser;
+        if (menuItem.id == "context_openNonRemoteWindow") {
+          menuItem.disabled = !!parseInt(this.contextTab.getAttribute("usercontextid"));
+        }
+      }
+    }
+
+    disabled = gBrowser.visibleTabs.length == 1;
+    menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple-visible");
+    for (let menuItem of menuItems)
+      menuItem.disabled = disabled;
+
+    // Session store
+    document.getElementById("context_undoCloseTab").disabled =
+      SessionStore.getClosedTabCount(window) == 0;
+
+    // Only one of pin/unpin should be visible
+    document.getElementById("context_pinTab").hidden = this.contextTab.pinned;
+    document.getElementById("context_unpinTab").hidden = !this.contextTab.pinned;
+
+    // Disable "Close Tabs to the Right" if there are no tabs
+    // following it and hide it when the user rightclicked on a pinned
+    // tab.
+    document.getElementById("context_closeTabsToTheEnd").disabled =
+      gBrowser.getTabsToTheEndFrom(this.contextTab).length == 0;
+    document.getElementById("context_closeTabsToTheEnd").hidden = this.contextTab.pinned;
+
+    // Disable "Close other Tabs" if there is only one unpinned tab and
+    // hide it when the user rightclicked on a pinned tab.
+    let unpinnedTabs = gBrowser.visibleTabs.length - gBrowser._numPinnedTabs;
+    document.getElementById("context_closeOtherTabs").disabled = unpinnedTabs <= 1;
+    document.getElementById("context_closeOtherTabs").hidden = this.contextTab.pinned;
+
+    // Hide "Bookmark All Tabs" for a pinned tab.  Update its state if visible.
+    let bookmarkAllTabs = document.getElementById("context_bookmarkAllTabs");
+    bookmarkAllTabs.hidden = this.contextTab.pinned;
+    if (!bookmarkAllTabs.hidden)
+      PlacesCommandHook.updateBookmarkAllTabsCommand();
+
+    // Adjust the state of the toggle mute menu item.
+    let toggleMute = document.getElementById("context_toggleMuteTab");
+    if (this.contextTab.hasAttribute("muted")) {
+      toggleMute.label = gNavigatorBundle.getString("unmuteTab.label");
+      toggleMute.accessKey = gNavigatorBundle.getString("unmuteTab.accesskey");
+    } else {
+      toggleMute.label = gNavigatorBundle.getString("muteTab.label");
+      toggleMute.accessKey = gNavigatorBundle.getString("muteTab.accesskey");
+    }
+
+    this.contextTab.toggleMuteMenuItem = toggleMute;
+    this._updateToggleMuteMenuItem(this.contextTab);
+
+    this.contextTab.addEventListener("TabAttrModified", this, false);
+    aPopupMenu.addEventListener("popuphiding", this, false);
+
+    gFxAccounts.updateTabContextMenu(aPopupMenu);
+  },
+  handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "popuphiding":
+        gBrowser.removeEventListener("TabAttrModified", this);
+        aEvent.target.removeEventListener("popuphiding", this);
+        break;
+      case "TabAttrModified":
+        let tab = aEvent.target;
+        this._updateToggleMuteMenuItem(tab,
+          attr => aEvent.detail.changed.indexOf(attr) >= 0);
+        break;
+    }
+  }
+};
+
+Object.defineProperty(this, "HUDService", {
+  get: function HUDService_getter() {
+    let devtools = Cu.import("resource://devtools/shared/Loader.jsm", {}).devtools;
+    return devtools.require("devtools/client/webconsole/hudservice");
+  },
+  configurable: true,
+  enumerable: true
+});
+
+// Prompt user to restart the browser in safe mode
+function safeModeRestart() {
+  if (Services.appinfo.inSafeMode) {
+    let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"].
+                     createInstance(Ci.nsISupportsPRBool);
+    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+
+    if (cancelQuit.data)
+      return;
+
+    Services.startup.quit(Ci.nsIAppStartup.eRestart | Ci.nsIAppStartup.eAttemptQuit);
+    return;
+  }
+
+  Services.obs.notifyObservers(null, "restart-in-safe-mode", "");
+}
+
+/* duplicateTabIn duplicates tab in a place specified by the parameter |where|.
+ *
+ * |where| can be:
+ *  "tab"         new tab
+ *  "tabshifted"  same as "tab" but in background if default is to select new
+ *                tabs, and vice versa
+ *  "window"      new window
+ *
+ * delta is the offset to the history entry that you want to load.
+ */
+function duplicateTabIn(aTab, where, delta) {
+  switch (where) {
+    case "window":
+      let otherWin = OpenBrowserWindow();
+      let delayedStartupFinished = (subject, topic) => {
+        if (topic == "browser-delayed-startup-finished" &&
+            subject == otherWin) {
+          Services.obs.removeObserver(delayedStartupFinished, topic);
+          let otherGBrowser = otherWin.gBrowser;
+          let otherTab = otherGBrowser.selectedTab;
+          SessionStore.duplicateTab(otherWin, aTab, delta);
+          otherGBrowser.removeTab(otherTab, { animate: false });
+        }
+      };
+
+      Services.obs.addObserver(delayedStartupFinished,
+                               "browser-delayed-startup-finished",
+                               false);
+      break;
+    case "tabshifted":
+      SessionStore.duplicateTab(window, aTab, delta);
+      // A background tab has been opened, nothing else to do here.
+      break;
+    case "tab":
+      let newTab = SessionStore.duplicateTab(window, aTab, delta);
+      gBrowser.selectedTab = newTab;
+      break;
+  }
+}
+
+var Scratchpad = {
+  openScratchpad: function SP_openScratchpad() {
+    return this.ScratchpadManager.openScratchpad();
+  }
+};
+
+XPCOMUtils.defineLazyGetter(Scratchpad, "ScratchpadManager", function() {
+  let tmp = {};
+  Cu.import("resource://devtools/client/scratchpad/scratchpad-manager.jsm", tmp);
+  return tmp.ScratchpadManager;
+});
+
+var ResponsiveUI = {
+  toggle: function RUI_toggle() {
+    this.ResponsiveUIManager.toggle(window, gBrowser.selectedTab);
+  }
+};
+
+XPCOMUtils.defineLazyGetter(ResponsiveUI, "ResponsiveUIManager", function() {
+  let tmp = {};
+  Cu.import("resource://devtools/client/responsivedesign/responsivedesign.jsm", tmp);
+  return tmp.ResponsiveUIManager;
+});
+
+var MousePosTracker = {
+  _listeners: new Set(),
+  _x: 0,
+  _y: 0,
+  get _windowUtils() {
+    delete this._windowUtils;
+    return this._windowUtils = window.getInterface(Ci.nsIDOMWindowUtils);
+  },
+
+  addListener: function (listener) {
+    if (this._listeners.has(listener))
+      return;
+
+    listener._hover = false;
+    this._listeners.add(listener);
+
+    this._callListener(listener);
+  },
+
+  removeListener: function (listener) {
+    this._listeners.delete(listener);
+  },
+
+  handleEvent: function (event) {
+    var fullZoom = this._windowUtils.fullZoom;
+    this._x = event.screenX / fullZoom - window.mozInnerScreenX;
+    this._y = event.screenY / fullZoom - window.mozInnerScreenY;
+
+    this._listeners.forEach(function (listener) {
+      try {
+        this._callListener(listener);
+      } catch (e) {
+        Cu.reportError(e);
+      }
+    }, this);
+  },
+
+  _callListener: function (listener) {
+    let rect = listener.getMouseTargetRect();
+    let hover = this._x >= rect.left &&
+                this._x <= rect.right &&
+                this._y >= rect.top &&
+                this._y <= rect.bottom;
+
+    if (hover == listener._hover)
+      return;
+
+    listener._hover = hover;
+
+    if (hover) {
+      if (listener.onMouseEnter)
+        listener.onMouseEnter();
+    } else if (listener.onMouseLeave) {
+      listener.onMouseLeave();
+    }
+  }
+};
+
+var ToolbarIconColor = {
+  init: function () {
+    this._initialized = true;
+
+    window.addEventListener("activate", this);
+    window.addEventListener("deactivate", this);
+    Services.obs.addObserver(this, "lightweight-theme-styling-update", false);
+
+    // If the window isn't active now, we assume that it has never been active
+    // before and will soon become active such that inferFromText will be
+    // called from the initial activate event.
+    if (Services.focus.activeWindow == window)
+      this.inferFromText();
+  },
+
+  uninit: function () {
+    this._initialized = false;
+
+    window.removeEventListener("activate", this);
+    window.removeEventListener("deactivate", this);
+    Services.obs.removeObserver(this, "lightweight-theme-styling-update");
+  },
+
+  handleEvent: function (event) {
+    switch (event.type) {
+      case "activate":
+      case "deactivate":
+        this.inferFromText();
+        break;
+    }
+  },
+
+  observe: function (aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "lightweight-theme-styling-update":
+        // inferFromText needs to run after LightweightThemeConsumer.jsm's
+        // lightweight-theme-styling-update observer.
+        setTimeout(() => { this.inferFromText(); }, 0);
+        break;
+    }
+  },
+
+  inferFromText: function () {
+    if (!this._initialized)
+      return;
+
+    function parseRGB(aColorString) {
+      let rgb = aColorString.match(/^rgba?\((\d+), (\d+), (\d+)/);
+      rgb.shift();
+      return rgb.map(x => parseInt(x));
+    }
+
+    let toolbarSelector = "#navigator-toolbox > toolbar:not([collapsed=true]):not(#addon-bar)";
+    if (AppConstants.platform == "macosx")
+      toolbarSelector += ":not([type=menubar])";
+
+    // The getComputedStyle calls and setting the brighttext are separated in
+    // two loops to avoid flushing layout and making it dirty repeatedly.
+
+    let luminances = new Map;
+    for (let toolbar of document.querySelectorAll(toolbarSelector)) {
+      let [r, g, b] = parseRGB(getComputedStyle(toolbar).color);
+      let luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
+      luminances.set(toolbar, luminance);
+    }
+
+    for (let [toolbar, luminance] of luminances) {
+      if (luminance <= 110)
+        toolbar.removeAttribute("brighttext");
+      else
+        toolbar.setAttribute("brighttext", "true");
+    }
+  }
+}
+
+var PanicButtonNotifier = {
+  init: function() {
+    this._initialized = true;
+    if (window.PanicButtonNotifierShouldNotify) {
+      delete window.PanicButtonNotifierShouldNotify;
+      this.notify();
+    }
+  },
+  notify: function() {
+    if (!this._initialized) {
+      window.PanicButtonNotifierShouldNotify = true;
+      return;
+    }
+    // Display notification panel here...
+    try {
+      let popup = document.getElementById("panic-button-success-notification");
+      popup.hidden = false;
+      let widget = CustomizableUI.getWidget("panic-button").forWindow(window);
+      let anchor = widget.anchor;
+      anchor = document.getAnonymousElementByAttribute(anchor, "class", "toolbarbutton-icon");
+      popup.openPopup(anchor, popup.getAttribute("position"));
+    } catch (ex) {
+      Cu.reportError(ex);
+    }
+  },
+  close: function() {
+    let popup = document.getElementById("panic-button-success-notification");
+    popup.hidePopup();
+  },
+};
+
+var AboutPrivateBrowsingListener = {
+  init: function () {
+    window.messageManager.addMessageListener(
+      "AboutPrivateBrowsing:OpenPrivateWindow",
+      msg => {
+        OpenBrowserWindow({private: true});
+    });
+    window.messageManager.addMessageListener(
+      "AboutPrivateBrowsing:ToggleTrackingProtection",
+      msg => {
+        const PREF = "privacy.trackingprotection.pbmode.enabled";
+        Services.prefs.setBoolPref(PREF, !Services.prefs.getBoolPref(PREF));
+    });
+    window.messageManager.addMessageListener(
+      "AboutPrivateBrowsing:DontShowIntroPanelAgain",
+      msg => {
+        TrackingProtection.dontShowIntroPanelAgain();
+    });
+  }
+};
+
+function TabModalPromptBox(browser) {
+  this._weakBrowserRef = Cu.getWeakReference(browser);
+}
+
+TabModalPromptBox.prototype = {
+  _promptCloseCallback(onCloseCallback, principalToAllowFocusFor, allowFocusCheckbox, ...args) {
+    if (principalToAllowFocusFor && allowFocusCheckbox &&
+        allowFocusCheckbox.checked) {
+      Services.perms.addFromPrincipal(principalToAllowFocusFor, "focus-tab-by-prompt",
+                                      Services.perms.ALLOW_ACTION);
+    }
+    onCloseCallback.apply(this, args);
+  },
+
+  appendPrompt(args, onCloseCallback) {
+    const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+    let newPrompt = document.createElementNS(XUL_NS, "tabmodalprompt");
+    let browser = this.browser;
+    browser.parentNode.insertBefore(newPrompt, browser.nextSibling);
+    browser.setAttribute("tabmodalPromptShowing", true);
+
+    newPrompt.clientTop; // style flush to assure binding is attached
+
+    let prompts = this.listPrompts();
+    if (prompts.length > 1) {
+      // Let's hide ourself behind the current prompt.
+      newPrompt.hidden = true;
+    }
+
+    let principalToAllowFocusFor = this._allowTabFocusByPromptPrincipal;
+    delete this._allowTabFocusByPromptPrincipal;
+
+    let allowFocusCheckbox; // Define outside the if block so we can bind it into the callback.
+    let hostForAllowFocusCheckbox = "";
+    try {
+      hostForAllowFocusCheckbox = principalToAllowFocusFor.URI.host;
+    } catch (ex) { /* Ignore exceptions for host-less URIs */ }
+    if (hostForAllowFocusCheckbox) {
+      let allowFocusRow = document.createElementNS(XUL_NS, "row");
+      allowFocusCheckbox = document.createElementNS(XUL_NS, "checkbox");
+      let spacer = document.createElementNS(XUL_NS, "spacer");
+      allowFocusRow.appendChild(spacer);
+      let label = gBrowser.mStringBundle.getFormattedString("tabs.allowTabFocusByPromptForSite",
+                                                            [hostForAllowFocusCheckbox]);
+      allowFocusCheckbox.setAttribute("label", label);
+      allowFocusRow.appendChild(allowFocusCheckbox);
+      newPrompt.appendChild(allowFocusRow);
+    }
+
+    let tab = gBrowser.getTabForBrowser(browser);
+    let closeCB = this._promptCloseCallback.bind(null, onCloseCallback, principalToAllowFocusFor,
+                                                 allowFocusCheckbox);
+    newPrompt.init(args, tab, closeCB);
+    return newPrompt;
+  },
+
+  removePrompt(aPrompt) {
+    let browser = this.browser;
+    browser.parentNode.removeChild(aPrompt);
+
+    let prompts = this.listPrompts();
+    if (prompts.length) {
+      let prompt = prompts[prompts.length - 1];
+      prompt.hidden = false;
+      prompt.Dialog.setDefaultFocus();
+    } else {
+      browser.removeAttribute("tabmodalPromptShowing");
+      browser.focus();
+    }
+  },
+
+  listPrompts(aPrompt) {
+    // Get the nodelist, then return as an array
+    const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+    let els = this.browser.parentNode.getElementsByTagNameNS(XUL_NS, "tabmodalprompt");
+    return Array.from(els);
+  },
+
+  onNextPromptShowAllowFocusCheckboxFor(principal) {
+    this._allowTabFocusByPromptPrincipal = principal;
+  },
+
+  get browser() {
+    let browser = this._weakBrowserRef.get();
+    if (!browser) {
+      throw "Stale promptbox! The associated browser is gone.";
+    }
+    return browser;
+  },
+};