Issue #303 Part 1: Move basilisk files from /browser to /application/basilisk

1 files changed, 0 insertions, 1219 deletions

diff --git a/browser/components/customizableui/CustomizableWidgets.jsm b/browser/components/customizableui/CustomizableWidgets.jsm
deleted file mode 100644
index 3e00d385f..000000000
--- a/browser/components/customizableui/CustomizableWidgets.jsm
+++ /dev/null
@@ -1,1219 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
-
-this.EXPORTED_SYMBOLS = ["CustomizableWidgets"];
-
-Cu.import("resource:///modules/CustomizableUI.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-Cu.import("resource://gre/modules/AppConstants.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "BrowserUITelemetry",
-  "resource:///modules/BrowserUITelemetry.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PlacesUtils",
-  "resource://gre/modules/PlacesUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PlacesUIUtils",
-  "resource:///modules/PlacesUIUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "RecentlyClosedTabsAndWindowsMenuUtils",
-  "resource:///modules/sessionstore/RecentlyClosedTabsAndWindowsMenuUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ShortcutUtils",
-  "resource://gre/modules/ShortcutUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "CharsetMenu",
-  "resource://gre/modules/CharsetMenu.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
-  "resource://gre/modules/PrivateBrowsingUtils.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "SyncedTabs",
-  "resource://services-sync/SyncedTabs.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "ContextualIdentityService",
-  "resource://gre/modules/ContextualIdentityService.jsm");
-
-XPCOMUtils.defineLazyGetter(this, "CharsetBundle", function() {
-  const kCharsetBundle = "chrome://global/locale/charsetMenu.properties";
-  return Services.strings.createBundle(kCharsetBundle);
-});
-XPCOMUtils.defineLazyGetter(this, "BrandBundle", function() {
-  const kBrandBundle = "chrome://branding/locale/brand.properties";
-  return Services.strings.createBundle(kBrandBundle);
-});
-
-const kNSXUL = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
-const kPrefCustomizationDebug = "browser.uiCustomization.debug";
-const kWidePanelItemClass = "panel-wide-item";
-
-XPCOMUtils.defineLazyGetter(this, "log", () => {
-  let scope = {};
-  Cu.import("resource://gre/modules/Console.jsm", scope);
-  let debug;
-  try {
-    debug = Services.prefs.getBoolPref(kPrefCustomizationDebug);
-  } catch (ex) {}
-  let consoleOptions = {
-    maxLogLevel: debug ? "all" : "log",
-    prefix: "CustomizableWidgets",
-  };
-  return new scope.ConsoleAPI(consoleOptions);
-});
-
-
-
-function setAttributes(aNode, aAttrs) {
-  let doc = aNode.ownerDocument;
-  for (let [name, value] of Object.entries(aAttrs)) {
-    if (!value) {
-      if (aNode.hasAttribute(name))
-        aNode.removeAttribute(name);
-    } else {
-      if (name == "shortcutId") {
-        continue;
-      }
-      if (name == "label" || name == "tooltiptext") {
-        let stringId = (typeof value == "string") ? value : name;
-        let additionalArgs = [];
-        if (aAttrs.shortcutId) {
-          let shortcut = doc.getElementById(aAttrs.shortcutId);
-          if (shortcut) {
-            additionalArgs.push(ShortcutUtils.prettifyShortcut(shortcut));
-          }
-        }
-        value = CustomizableUI.getLocalizedProperty({id: aAttrs.id}, stringId, additionalArgs);
-      }
-      aNode.setAttribute(name, value);
-    }
-  }
-}
-
-function updateCombinedWidgetStyle(aNode, aArea, aModifyCloseMenu) {
-  let inPanel = (aArea == CustomizableUI.AREA_PANEL);
-  let cls = inPanel ? "panel-combined-button" : "toolbarbutton-1 toolbarbutton-combined";
-  let attrs = {class: cls};
-  if (aModifyCloseMenu) {
-    attrs.closemenu = inPanel ? "none" : null;
-  }
-  for (let i = 0, l = aNode.childNodes.length; i < l; ++i) {
-    if (aNode.childNodes[i].localName == "separator")
-      continue;
-    setAttributes(aNode.childNodes[i], attrs);
-  }
-}
-
-function fillSubviewFromMenuItems(aMenuItems, aSubview) {
-  let attrs = ["oncommand", "onclick", "label", "key", "disabled",
-               "command", "observes", "hidden", "class", "origin",
-               "image", "checked"];
-
-  let doc = aSubview.ownerDocument;
-  let fragment = doc.createDocumentFragment();
-  for (let menuChild of aMenuItems) {
-    if (menuChild.hidden)
-      continue;
-
-    let subviewItem;
-    if (menuChild.localName == "menuseparator") {
-      // Don't insert duplicate or leading separators. This can happen if there are
-      // menus (which we don't copy) above the separator.
-      if (!fragment.lastChild || fragment.lastChild.localName == "menuseparator") {
-        continue;
-      }
-      subviewItem = doc.createElementNS(kNSXUL, "menuseparator");
-    } else if (menuChild.localName == "menuitem") {
-      subviewItem = doc.createElementNS(kNSXUL, "toolbarbutton");
-      CustomizableUI.addShortcut(menuChild, subviewItem);
-
-      let item = menuChild;
-      if (!item.hasAttribute("onclick")) {
-        subviewItem.addEventListener("click", event => {
-          let newEvent = new doc.defaultView.MouseEvent(event.type, event);
-          item.dispatchEvent(newEvent);
-        });
-      }
-
-      if (!item.hasAttribute("oncommand")) {
-        subviewItem.addEventListener("command", event => {
-          let newEvent = doc.createEvent("XULCommandEvent");
-          newEvent.initCommandEvent(
-            event.type, event.bubbles, event.cancelable, event.view,
-            event.detail, event.ctrlKey, event.altKey, event.shiftKey,
-            event.metaKey, event.sourceEvent);
-          item.dispatchEvent(newEvent);
-        });
-      }
-    } else {
-      continue;
-    }
-    for (let attr of attrs) {
-      let attrVal = menuChild.getAttribute(attr);
-      if (attrVal)
-        subviewItem.setAttribute(attr, attrVal);
-    }
-    // We do this after so the .subviewbutton class doesn't get overriden.
-    if (menuChild.localName == "menuitem") {
-      subviewItem.classList.add("subviewbutton");
-    }
-    fragment.appendChild(subviewItem);
-  }
-  aSubview.appendChild(fragment);
-}
-
-function clearSubview(aSubview) {
-  let parent = aSubview.parentNode;
-  // We'll take the container out of the document before cleaning it out
-  // to avoid reflowing each time we remove something.
-  parent.removeChild(aSubview);
-
-  while (aSubview.firstChild) {
-    aSubview.firstChild.remove();
-  }
-
-  parent.appendChild(aSubview);
-}
-
-const CustomizableWidgets = [
-  {
-    id: "history-panelmenu",
-    type: "view",
-    viewId: "PanelUI-history",
-    shortcutId: "key_gotoHistory",
-    tooltiptext: "history-panelmenu.tooltiptext2",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onViewShowing: function(aEvent) {
-      // Populate our list of history
-      const kMaxResults = 15;
-      let doc = aEvent.target.ownerDocument;
-      let win = doc.defaultView;
-
-      let options = PlacesUtils.history.getNewQueryOptions();
-      options.excludeQueries = true;
-      options.queryType = options.QUERY_TYPE_HISTORY;
-      options.sortingMode = options.SORT_BY_DATE_DESCENDING;
-      options.maxResults = kMaxResults;
-      let query = PlacesUtils.history.getNewQuery();
-
-      let items = doc.getElementById("PanelUI-historyItems");
-      // Clear previous history items.
-      while (items.firstChild) {
-        items.firstChild.remove();
-      }
-
-      // Get all statically placed buttons to supply them with keyboard shortcuts.
-      let staticButtons = items.parentNode.getElementsByTagNameNS(kNSXUL, "toolbarbutton");
-      for (let i = 0, l = staticButtons.length; i < l; ++i)
-        CustomizableUI.addShortcut(staticButtons[i]);
-
-      PlacesUtils.history.QueryInterface(Ci.nsPIPlacesDatabase)
-                         .asyncExecuteLegacyQueries([query], 1, options, {
-        handleResult: function (aResultSet) {
-          let onItemCommand = function (aEvent) {
-            // Only handle the click event for middle clicks, we're using the command
-            // event otherwise.
-            if (aEvent.type == "click" && aEvent.button != 1) {
-              return;
-            }
-            let item = aEvent.target;
-            win.openUILink(item.getAttribute("targetURI"), aEvent);
-            CustomizableUI.hidePanelForNode(item);
-          };
-          let fragment = doc.createDocumentFragment();
-          let row;
-          while ((row = aResultSet.getNextRow())) {
-            let uri = row.getResultByIndex(1);
-            let title = row.getResultByIndex(2);
-            let icon = row.getResultByIndex(6);
-
-            let item = doc.createElementNS(kNSXUL, "toolbarbutton");
-            item.setAttribute("label", title || uri);
-            item.setAttribute("targetURI", uri);
-            item.setAttribute("class", "subviewbutton");
-            item.addEventListener("command", onItemCommand);
-            item.addEventListener("click", onItemCommand);
-            if (icon) {
-              let iconURL = "moz-anno:favicon:" + icon;
-              item.setAttribute("image", iconURL);
-            }
-            fragment.appendChild(item);
-          }
-          items.appendChild(fragment);
-        },
-        handleError: function (aError) {
-          log.debug("History view tried to show but had an error: " + aError);
-        },
-        handleCompletion: function (aReason) {
-          log.debug("History view is being shown!");
-        },
-      });
-
-      let recentlyClosedTabs = doc.getElementById("PanelUI-recentlyClosedTabs");
-      while (recentlyClosedTabs.firstChild) {
-        recentlyClosedTabs.removeChild(recentlyClosedTabs.firstChild);
-      }
-
-      let recentlyClosedWindows = doc.getElementById("PanelUI-recentlyClosedWindows");
-      while (recentlyClosedWindows.firstChild) {
-        recentlyClosedWindows.removeChild(recentlyClosedWindows.firstChild);
-      }
-
-      let utils = RecentlyClosedTabsAndWindowsMenuUtils;
-      let tabsFragment = utils.getTabsFragment(doc.defaultView, "toolbarbutton", true,
-                                               "menuRestoreAllTabsSubview.label");
-      let separator = doc.getElementById("PanelUI-recentlyClosedTabs-separator");
-      let elementCount = tabsFragment.childElementCount;
-      separator.hidden = !elementCount;
-      while (--elementCount >= 0) {
-        tabsFragment.children[elementCount].classList.add("subviewbutton", "cui-withicon");
-      }
-      recentlyClosedTabs.appendChild(tabsFragment);
-
-      let windowsFragment = utils.getWindowsFragment(doc.defaultView, "toolbarbutton", true,
-                                                     "menuRestoreAllWindowsSubview.label");
-      separator = doc.getElementById("PanelUI-recentlyClosedWindows-separator");
-      elementCount = windowsFragment.childElementCount;
-      separator.hidden = !elementCount;
-      while (--elementCount >= 0) {
-        windowsFragment.children[elementCount].classList.add("subviewbutton", "cui-withicon");
-      }
-      recentlyClosedWindows.appendChild(windowsFragment);
-    },
-    onCreated: function(aNode) {
-      // Middle clicking recently closed items won't close the panel - cope:
-      let onRecentlyClosedClick = function(aEvent) {
-        if (aEvent.button == 1) {
-          CustomizableUI.hidePanelForNode(this);
-        }
-      };
-      let doc = aNode.ownerDocument;
-      let recentlyClosedTabs = doc.getElementById("PanelUI-recentlyClosedTabs");
-      let recentlyClosedWindows = doc.getElementById("PanelUI-recentlyClosedWindows");
-      recentlyClosedTabs.addEventListener("click", onRecentlyClosedClick);
-      recentlyClosedWindows.addEventListener("click", onRecentlyClosedClick);
-    },
-    onViewHiding: function(aEvent) {
-      log.debug("History view is being hidden!");
-    }
-  }, {
-    id: "sync-button",
-    label: "remotetabs-panelmenu.label",
-    tooltiptext: "remotetabs-panelmenu.tooltiptext2",
-    type: "view",
-    viewId: "PanelUI-remotetabs",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    deckIndices: {
-      DECKINDEX_TABS: 0,
-      DECKINDEX_TABSDISABLED: 1,
-      DECKINDEX_FETCHING: 2,
-      DECKINDEX_NOCLIENTS: 3,
-    },
-    onCreated(aNode) {
-      // Add an observer to the button so we get the animation during sync.
-      // (Note the observer sets many attributes, including label and
-      // tooltiptext, but we only want the 'syncstatus' attribute for the
-      // animation)
-      let doc = aNode.ownerDocument;
-      let obnode = doc.createElementNS(kNSXUL, "observes");
-      obnode.setAttribute("element", "sync-status");
-      obnode.setAttribute("attribute", "syncstatus");
-      aNode.appendChild(obnode);
-
-      // A somewhat complicated dance to format the mobilepromo label.
-      let bundle = doc.getElementById("bundle_browser");
-      let formatArgs = ["android", "ios"].map(os => {
-        let link = doc.createElement("label");
-        link.textContent = bundle.getString(`appMenuRemoteTabs.mobilePromo.${os}`);
-        link.setAttribute("mobile-promo-os", os);
-        link.className = "text-link remotetabs-promo-link";
-        return link.outerHTML;
-      });
-      let promoParentElt = doc.getElementById("PanelUI-remotetabs-mobile-promo");
-      // Put it all together...
-      let contents = bundle.getFormattedString("appMenuRemoteTabs.mobilePromo.text2", formatArgs);
-      promoParentElt.innerHTML = contents;
-      // We manually manage the "click" event to open the promo links because
-      // allowing the "text-link" widget handle it has 2 problems: (1) it only
-      // supports button 0 and (2) it's tricky to intercept when it does the
-      // open and auto-close the panel. (1) can probably be fixed, but (2) is
-      // trickier without hard-coding here the knowledge of exactly what buttons
-      // it does support.
-      // So we allow left and middle clicks to open the link in a new tab and
-      // close the panel; not setting a "href" attribute prevents the text-link
-      // widget handling it, and we build the final URL in the click handler to
-      // make testing easier (ie, so tests can change the pref after the links
-      // were created and have the new pref value used.)
-      promoParentElt.addEventListener("click", e => {
-        let os = e.target.getAttribute("mobile-promo-os");
-        if (!os || e.button > 1) {
-          return;
-        }
-        let link = Services.prefs.getCharPref(`identity.mobilepromo.${os}`) + "synced-tabs";
-        doc.defaultView.openUILinkIn(link, "tab");
-        CustomizableUI.hidePanelForNode(e.target);
-      });
-    },
-    onViewShowing(aEvent) {
-      let doc = aEvent.target.ownerDocument;
-      this._tabsList = doc.getElementById("PanelUI-remotetabs-tabslist");
-      Services.obs.addObserver(this, SyncedTabs.TOPIC_TABS_CHANGED, false);
-
-      if (SyncedTabs.isConfiguredToSyncTabs) {
-        if (SyncedTabs.hasSyncedThisSession) {
-          this.setDeckIndex(this.deckIndices.DECKINDEX_TABS);
-        } else {
-          // Sync hasn't synced tabs yet, so show the "fetching" panel.
-          this.setDeckIndex(this.deckIndices.DECKINDEX_FETCHING);
-        }
-        // force a background sync.
-        SyncedTabs.syncTabs().catch(ex => {
-          Cu.reportError(ex);
-        });
-        // show the current list - it will be updated by our observer.
-        this._showTabs();
-      } else {
-        // not configured to sync tabs, so no point updating the list.
-        this.setDeckIndex(this.deckIndices.DECKINDEX_TABSDISABLED);
-      }
-    },
-    onViewHiding() {
-      Services.obs.removeObserver(this, SyncedTabs.TOPIC_TABS_CHANGED);
-      this._tabsList = null;
-    },
-    _tabsList: null,
-    observe(subject, topic, data) {
-      switch (topic) {
-        case SyncedTabs.TOPIC_TABS_CHANGED:
-          this._showTabs();
-          break;
-        default:
-          break;
-      }
-    },
-    setDeckIndex(index) {
-      let deck = this._tabsList.ownerDocument.getElementById("PanelUI-remotetabs-deck");
-      // We call setAttribute instead of relying on the XBL property setter due
-      // to things going wrong when we try and set the index before the XBL
-      // binding has been created - see bug 1241851 for the gory details.
-      deck.setAttribute("selectedIndex", index);
-    },
-
-    _showTabsPromise: Promise.resolve(),
-    // Update the tab list after any existing in-flight updates are complete.
-    _showTabs() {
-      this._showTabsPromise = this._showTabsPromise.then(() => {
-        return this.__showTabs();
-      });
-    },
-    // Return a new promise to update the tab list.
-    __showTabs() {
-      let doc = this._tabsList.ownerDocument;
-      return SyncedTabs.getTabClients().then(clients => {
-        // The view may have been hidden while the promise was resolving.
-        if (!this._tabsList) {
-          return;
-        }
-        if (clients.length === 0 && !SyncedTabs.hasSyncedThisSession) {
-          // the "fetching tabs" deck is being shown - let's leave it there.
-          // When that first sync completes we'll be notified and update.
-          return;
-        }
-
-        if (clients.length === 0) {
-          this.setDeckIndex(this.deckIndices.DECKINDEX_NOCLIENTS);
-          return;
-        }
-
-        this.setDeckIndex(this.deckIndices.DECKINDEX_TABS);
-        this._clearTabList();
-        SyncedTabs.sortTabClientsByLastUsed(clients, 50 /* maxTabs */);
-        let fragment = doc.createDocumentFragment();
-
-        for (let client of clients) {
-          // add a menu separator for all clients other than the first.
-          if (fragment.lastChild) {
-            let separator = doc.createElementNS(kNSXUL, "menuseparator");
-            fragment.appendChild(separator);
-          }
-          this._appendClient(client, fragment);
-        }
-        this._tabsList.appendChild(fragment);
-      }).catch(err => {
-        Cu.reportError(err);
-      }).then(() => {
-        // an observer for tests.
-        Services.obs.notifyObservers(null, "synced-tabs-menu:test:tabs-updated", null);
-      });
-    },
-    _clearTabList () {
-      let list = this._tabsList;
-      while (list.lastChild) {
-        list.lastChild.remove();
-      }
-    },
-    _showNoClientMessage() {
-      this._appendMessageLabel("notabslabel");
-    },
-    _appendMessageLabel(messageAttr, appendTo = null) {
-      if (!appendTo) {
-        appendTo = this._tabsList;
-      }
-      let message = this._tabsList.getAttribute(messageAttr);
-      let doc = this._tabsList.ownerDocument;
-      let messageLabel = doc.createElementNS(kNSXUL, "label");
-      messageLabel.textContent = message;
-      appendTo.appendChild(messageLabel);
-      return messageLabel;
-    },
-    _appendClient: function (client, attachFragment) {
-      let doc = attachFragment.ownerDocument;
-      // Create the element for the remote client.
-      let clientItem = doc.createElementNS(kNSXUL, "label");
-      clientItem.setAttribute("itemtype", "client");
-      let window = doc.defaultView;
-      clientItem.setAttribute("tooltiptext",
-        window.gSyncUI.formatLastSyncDate(new Date(client.lastModified)));
-      clientItem.textContent = client.name;
-
-      attachFragment.appendChild(clientItem);
-
-      if (client.tabs.length == 0) {
-        let label = this._appendMessageLabel("notabsforclientlabel", attachFragment);
-        label.setAttribute("class", "PanelUI-remotetabs-notabsforclient-label");
-      } else {
-        for (let tab of client.tabs) {
-          let tabEnt = this._createTabElement(doc, tab);
-          attachFragment.appendChild(tabEnt);
-        }
-      }
-    },
-    _createTabElement(doc, tabInfo) {
-      let item = doc.createElementNS(kNSXUL, "toolbarbutton");
-      let tooltipText = (tabInfo.title ? tabInfo.title + "\n" : "") + tabInfo.url;
-      item.setAttribute("itemtype", "tab");
-      item.setAttribute("class", "subviewbutton");
-      item.setAttribute("targetURI", tabInfo.url);
-      item.setAttribute("label", tabInfo.title != "" ? tabInfo.title : tabInfo.url);
-      item.setAttribute("image", tabInfo.icon);
-      item.setAttribute("tooltiptext", tooltipText);
-      // We need to use "click" instead of "command" here so openUILink
-      // respects different buttons (eg, to open in a new tab).
-      item.addEventListener("click", e => {
-        doc.defaultView.openUILink(tabInfo.url, e);
-        CustomizableUI.hidePanelForNode(item);
-        BrowserUITelemetry.countSyncedTabEvent("open", "toolbarbutton-subview");
-      });
-      return item;
-    },
-  }, {
-    id: "privatebrowsing-button",
-    shortcutId: "key_privatebrowsing",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onCommand: function(e) {
-      let win = e.target.ownerGlobal;
-      win.OpenBrowserWindow({private: true});
-    }
-  }, {
-    id: "save-page-button",
-    shortcutId: "key_savePage",
-    tooltiptext: "save-page-button.tooltiptext3",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onCommand: function(aEvent) {
-      let win = aEvent.target.ownerGlobal;
-      win.saveBrowser(win.gBrowser.selectedBrowser);
-    }
-  }, {
-    id: "find-button",
-    shortcutId: "key_find",
-    tooltiptext: "find-button.tooltiptext3",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onCommand: function(aEvent) {
-      let win = aEvent.target.ownerGlobal;
-      if (win.gFindBar) {
-        win.gFindBar.onFindCommand();
-      }
-    }
-  }, {
-    id: "open-file-button",
-    shortcutId: "openFileKb",
-    tooltiptext: "open-file-button.tooltiptext3",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onCommand: function(aEvent) {
-      let win = aEvent.target.ownerGlobal;
-      win.BrowserOpenFileWindow();
-    }
-  }, {
-    id: "sidebar-button",
-    type: "view",
-    viewId: "PanelUI-sidebar",
-    tooltiptext: "sidebar-button.tooltiptext2",
-    onViewShowing: function(aEvent) {
-      // Populate the subview with whatever menuitems are in the
-      // sidebar menu. We skip menu elements, because the menu panel has no way
-      // of dealing with those right now.
-      let doc = aEvent.target.ownerDocument;
-      let menu = doc.getElementById("viewSidebarMenu");
-
-      // First clear any existing menuitems then populate. Add it to the
-      // standard menu first, then copy all sidebar options to the panel.
-      let sidebarItems = doc.getElementById("PanelUI-sidebarItems");
-      clearSubview(sidebarItems);
-      fillSubviewFromMenuItems([...menu.children], sidebarItems);
-    }
-  }, {
-    id: "add-ons-button",
-    shortcutId: "key_openAddons",
-    tooltiptext: "add-ons-button.tooltiptext3",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onCommand: function(aEvent) {
-      let win = aEvent.target.ownerGlobal;
-      win.BrowserOpenAddonsMgr();
-    }
-  }, {
-    id: "zoom-controls",
-    type: "custom",
-    tooltiptext: "zoom-controls.tooltiptext2",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onBuild: function(aDocument) {
-      const kPanelId = "PanelUI-popup";
-      let areaType = CustomizableUI.getAreaType(this.currentArea);
-      let inPanel = areaType == CustomizableUI.TYPE_MENU_PANEL;
-      let inToolbar = areaType == CustomizableUI.TYPE_TOOLBAR;
-
-      let buttons = [{
-        id: "zoom-out-button",
-        command: "cmd_fullZoomReduce",
-        label: true,
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_fullZoomReduce",
-      }, {
-        id: "zoom-reset-button",
-        command: "cmd_fullZoomReset",
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_fullZoomReset",
-      }, {
-        id: "zoom-in-button",
-        command: "cmd_fullZoomEnlarge",
-        label: true,
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_fullZoomEnlarge",
-      }];
-
-      let node = aDocument.createElementNS(kNSXUL, "toolbaritem");
-      node.setAttribute("id", "zoom-controls");
-      node.setAttribute("label", CustomizableUI.getLocalizedProperty(this, "label"));
-      node.setAttribute("title", CustomizableUI.getLocalizedProperty(this, "tooltiptext"));
-      // Set this as an attribute in addition to the property to make sure we can style correctly.
-      node.setAttribute("removable", "true");
-      node.classList.add("chromeclass-toolbar-additional");
-      node.classList.add("toolbaritem-combined-buttons");
-      node.classList.add(kWidePanelItemClass);
-
-      buttons.forEach(function(aButton, aIndex) {
-        if (aIndex != 0)
-          node.appendChild(aDocument.createElementNS(kNSXUL, "separator"));
-        let btnNode = aDocument.createElementNS(kNSXUL, "toolbarbutton");
-        setAttributes(btnNode, aButton);
-        node.appendChild(btnNode);
-      });
-
-      // The middle node is the 'Reset Zoom' button.
-      let zoomResetButton = node.childNodes[2];
-      let window = aDocument.defaultView;
-      function updateZoomResetButton() {
-        let updateDisplay = true;
-        // Label should always show 100% in customize mode, so don't update:
-        if (aDocument.documentElement.hasAttribute("customizing")) {
-          updateDisplay = false;
-        }
-        // XXXgijs in some tests we get called very early, and there's no docShell on the
-        // tabbrowser. This breaks the zoom toolkit code (see bug 897410). Don't let that happen:
-        let zoomFactor = 100;
-        try {
-          zoomFactor = Math.round(window.ZoomManager.zoom * 100);
-        } catch (e) {}
-        zoomResetButton.setAttribute("label", CustomizableUI.getLocalizedProperty(
-          buttons[1], "label", [updateDisplay ? zoomFactor : 100]
-        ));
-      }
-
-      // Register ourselves with the service so we know when the zoom prefs change.
-      Services.obs.addObserver(updateZoomResetButton, "browser-fullZoom:zoomChange", false);
-      Services.obs.addObserver(updateZoomResetButton, "browser-fullZoom:zoomReset", false);
-      Services.obs.addObserver(updateZoomResetButton, "browser-fullZoom:location-change", false);
-
-      if (inPanel) {
-        let panel = aDocument.getElementById(kPanelId);
-        panel.addEventListener("popupshowing", updateZoomResetButton);
-      } else {
-        if (inToolbar) {
-          let container = window.gBrowser.tabContainer;
-          container.addEventListener("TabSelect", updateZoomResetButton);
-        }
-        updateZoomResetButton();
-      }
-      updateCombinedWidgetStyle(node, this.currentArea, true);
-
-      let listener = {
-        onWidgetAdded: function(aWidgetId, aArea, aPosition) {
-          if (aWidgetId != this.id)
-            return;
-
-          updateCombinedWidgetStyle(node, aArea, true);
-          updateZoomResetButton();
-
-          let areaType = CustomizableUI.getAreaType(aArea);
-          if (areaType == CustomizableUI.TYPE_MENU_PANEL) {
-            let panel = aDocument.getElementById(kPanelId);
-            panel.addEventListener("popupshowing", updateZoomResetButton);
-          } else if (areaType == CustomizableUI.TYPE_TOOLBAR) {
-            let container = window.gBrowser.tabContainer;
-            container.addEventListener("TabSelect", updateZoomResetButton);
-          }
-        }.bind(this),
-
-        onWidgetRemoved: function(aWidgetId, aPrevArea) {
-          if (aWidgetId != this.id)
-            return;
-
-          let areaType = CustomizableUI.getAreaType(aPrevArea);
-          if (areaType == CustomizableUI.TYPE_MENU_PANEL) {
-            let panel = aDocument.getElementById(kPanelId);
-            panel.removeEventListener("popupshowing", updateZoomResetButton);
-          } else if (areaType == CustomizableUI.TYPE_TOOLBAR) {
-            let container = window.gBrowser.tabContainer;
-            container.removeEventListener("TabSelect", updateZoomResetButton);
-          }
-
-          // When a widget is demoted to the palette ('removed'), it's visual
-          // style should change.
-          updateCombinedWidgetStyle(node, null, true);
-          updateZoomResetButton();
-        }.bind(this),
-
-        onWidgetReset: function(aWidgetNode) {
-          if (aWidgetNode != node)
-            return;
-          updateCombinedWidgetStyle(node, this.currentArea, true);
-          updateZoomResetButton();
-        }.bind(this),
-
-        onWidgetUndoMove: function(aWidgetNode) {
-          if (aWidgetNode != node)
-            return;
-          updateCombinedWidgetStyle(node, this.currentArea, true);
-          updateZoomResetButton();
-        }.bind(this),
-
-        onWidgetMoved: function(aWidgetId, aArea) {
-          if (aWidgetId != this.id)
-            return;
-          updateCombinedWidgetStyle(node, aArea, true);
-          updateZoomResetButton();
-        }.bind(this),
-
-        onWidgetInstanceRemoved: function(aWidgetId, aDoc) {
-          if (aWidgetId != this.id || aDoc != aDocument)
-            return;
-
-          CustomizableUI.removeListener(listener);
-          Services.obs.removeObserver(updateZoomResetButton, "browser-fullZoom:zoomChange");
-          Services.obs.removeObserver(updateZoomResetButton, "browser-fullZoom:zoomReset");
-          Services.obs.removeObserver(updateZoomResetButton, "browser-fullZoom:location-change");
-          let panel = aDoc.getElementById(kPanelId);
-          panel.removeEventListener("popupshowing", updateZoomResetButton);
-          let container = aDoc.defaultView.gBrowser.tabContainer;
-          container.removeEventListener("TabSelect", updateZoomResetButton);
-        }.bind(this),
-
-        onCustomizeStart: function(aWindow) {
-          if (aWindow.document == aDocument) {
-            updateZoomResetButton();
-          }
-        },
-
-        onCustomizeEnd: function(aWindow) {
-          if (aWindow.document == aDocument) {
-            updateZoomResetButton();
-          }
-        },
-
-        onWidgetDrag: function(aWidgetId, aArea) {
-          if (aWidgetId != this.id)
-            return;
-          aArea = aArea || this.currentArea;
-          updateCombinedWidgetStyle(node, aArea, true);
-        }.bind(this)
-      };
-      CustomizableUI.addListener(listener);
-
-      return node;
-    }
-  }, {
-    id: "edit-controls",
-    type: "custom",
-    tooltiptext: "edit-controls.tooltiptext2",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onBuild: function(aDocument) {
-      let buttons = [{
-        id: "cut-button",
-        command: "cmd_cut",
-        label: true,
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_cut",
-      }, {
-        id: "copy-button",
-        command: "cmd_copy",
-        label: true,
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_copy",
-      }, {
-        id: "paste-button",
-        command: "cmd_paste",
-        label: true,
-        tooltiptext: "tooltiptext2",
-        shortcutId: "key_paste",
-      }];
-
-      let node = aDocument.createElementNS(kNSXUL, "toolbaritem");
-      node.setAttribute("id", "edit-controls");
-      node.setAttribute("label", CustomizableUI.getLocalizedProperty(this, "label"));
-      node.setAttribute("title", CustomizableUI.getLocalizedProperty(this, "tooltiptext"));
-      // Set this as an attribute in addition to the property to make sure we can style correctly.
-      node.setAttribute("removable", "true");
-      node.classList.add("chromeclass-toolbar-additional");
-      node.classList.add("toolbaritem-combined-buttons");
-      node.classList.add(kWidePanelItemClass);
-
-      buttons.forEach(function(aButton, aIndex) {
-        if (aIndex != 0)
-          node.appendChild(aDocument.createElementNS(kNSXUL, "separator"));
-        let btnNode = aDocument.createElementNS(kNSXUL, "toolbarbutton");
-        setAttributes(btnNode, aButton);
-        node.appendChild(btnNode);
-      });
-
-      updateCombinedWidgetStyle(node, this.currentArea);
-
-      let listener = {
-        onWidgetAdded: function(aWidgetId, aArea, aPosition) {
-          if (aWidgetId != this.id)
-            return;
-          updateCombinedWidgetStyle(node, aArea);
-        }.bind(this),
-
-        onWidgetRemoved: function(aWidgetId, aPrevArea) {
-          if (aWidgetId != this.id)
-            return;
-          // When a widget is demoted to the palette ('removed'), it's visual
-          // style should change.
-          updateCombinedWidgetStyle(node);
-        }.bind(this),
-
-        onWidgetReset: function(aWidgetNode) {
-          if (aWidgetNode != node)
-            return;
-          updateCombinedWidgetStyle(node, this.currentArea);
-        }.bind(this),
-
-        onWidgetUndoMove: function(aWidgetNode) {
-          if (aWidgetNode != node)
-            return;
-          updateCombinedWidgetStyle(node, this.currentArea);
-        }.bind(this),
-
-        onWidgetMoved: function(aWidgetId, aArea) {
-          if (aWidgetId != this.id)
-            return;
-          updateCombinedWidgetStyle(node, aArea);
-        }.bind(this),
-
-        onWidgetInstanceRemoved: function(aWidgetId, aDoc) {
-          if (aWidgetId != this.id || aDoc != aDocument)
-            return;
-          CustomizableUI.removeListener(listener);
-        }.bind(this),
-
-        onWidgetDrag: function(aWidgetId, aArea) {
-          if (aWidgetId != this.id)
-            return;
-          aArea = aArea || this.currentArea;
-          updateCombinedWidgetStyle(node, aArea);
-        }.bind(this)
-      };
-      CustomizableUI.addListener(listener);
-
-      return node;
-    }
-  },
-  {
-    id: "feed-button",
-    type: "view",
-    viewId: "PanelUI-feeds",
-    tooltiptext: "feed-button.tooltiptext2",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    onClick: function(aEvent) {
-      let win = aEvent.target.ownerGlobal;
-      let feeds = win.gBrowser.selectedBrowser.feeds;
-
-      // Here, we only care about the case where we have exactly 1 feed and the
-      // user clicked...
-      let isClick = (aEvent.button == 0 || aEvent.button == 1);
-      if (feeds && feeds.length == 1 && isClick) {
-        aEvent.preventDefault();
-        aEvent.stopPropagation();
-        win.FeedHandler.subscribeToFeed(feeds[0].href, aEvent);
-        CustomizableUI.hidePanelForNode(aEvent.target);
-      }
-    },
-    onViewShowing: function(aEvent) {
-      let doc = aEvent.target.ownerDocument;
-      let container = doc.getElementById("PanelUI-feeds");
-      let gotView = doc.defaultView.FeedHandler.buildFeedList(container, true);
-
-      // For no feeds or only a single one, don't show the panel.
-      if (!gotView) {
-        aEvent.preventDefault();
-        aEvent.stopPropagation();
-        return;
-      }
-    },
-    onCreated: function(node) {
-      let win = node.ownerGlobal;
-      let selectedBrowser = win.gBrowser.selectedBrowser;
-      let feeds = selectedBrowser && selectedBrowser.feeds;
-      if (!feeds || !feeds.length) {
-        node.setAttribute("disabled", "true");
-      }
-    }
-  }, {
-    id: "characterencoding-button",
-    label: "characterencoding-button2.label",
-    type: "view",
-    viewId: "PanelUI-characterEncodingView",
-    tooltiptext: "characterencoding-button2.tooltiptext",
-    defaultArea: CustomizableUI.AREA_PANEL,
-    maybeDisableMenu: function(aDocument) {
-      let window = aDocument.defaultView;
-      return !(window.gBrowser &&
-               window.gBrowser.selectedBrowser.mayEnableCharacterEncodingMenu);
-    },
-    populateList: function(aDocument, aContainerId, aSection) {
-      let containerElem = aDocument.getElementById(aContainerId);
-
-      containerElem.addEventListener("command", this.onCommand, false);
-
-      let list = this.charsetInfo[aSection];
-
-      for (let item of list) {
-        let elem = aDocument.createElementNS(kNSXUL, "toolbarbutton");
-        elem.setAttribute("label", item.label);
-        elem.setAttribute("type", "checkbox");
-        elem.section = aSection;
-        elem.value = item.value;
-        elem.setAttribute("class", "subviewbutton");
-        containerElem.appendChild(elem);
-      }
-    },
-    updateCurrentCharset: function(aDocument) {
-      let currentCharset = aDocument.defaultView.gBrowser.selectedBrowser.characterSet;
-      currentCharset = CharsetMenu.foldCharset(currentCharset);
-
-      let pinnedContainer = aDocument.getElementById("PanelUI-characterEncodingView-pinned");
-      let charsetContainer = aDocument.getElementById("PanelUI-characterEncodingView-charsets");
-      let elements = [...(pinnedContainer.childNodes), ...(charsetContainer.childNodes)];
-
-      this._updateElements(elements, currentCharset);
-    },
-    updateCurrentDetector: function(aDocument) {
-      let detectorContainer = aDocument.getElementById("PanelUI-characterEncodingView-autodetect");
-      let currentDetector;
-      try {
-        currentDetector = Services.prefs.getComplexValue(
-          "intl.charset.detector", Ci.nsIPrefLocalizedString).data;
-      } catch (e) {}
-
-      this._updateElements(detectorContainer.childNodes, currentDetector);
-    },
-    _updateElements: function(aElements, aCurrentItem) {
-      if (!aElements.length) {
-        return;
-      }
-      let disabled = this.maybeDisableMenu(aElements[0].ownerDocument);
-      for (let elem of aElements) {
-        if (disabled) {
-          elem.setAttribute("disabled", "true");
-        } else {
-          elem.removeAttribute("disabled");
-        }
-        if (elem.value.toLowerCase() == aCurrentItem.toLowerCase()) {
-          elem.setAttribute("checked", "true");
-        } else {
-          elem.removeAttribute("checked");
-        }
-      }
-    },
-    onViewShowing: function(aEvent) {
-      let document = aEvent.target.ownerDocument;
-
-      let autoDetectLabelId = "PanelUI-characterEncodingView-autodetect-label";
-      let autoDetectLabel = document.getElementById(autoDetectLabelId);
-      if (!autoDetectLabel.hasAttribute("value")) {
-        let label = CharsetBundle.GetStringFromName("charsetMenuAutodet");
-        autoDetectLabel.setAttribute("value", label);
-        this.populateList(document,
-                          "PanelUI-characterEncodingView-pinned",
-                          "pinnedCharsets");
-        this.populateList(document,
-                          "PanelUI-characterEncodingView-charsets",
-                          "otherCharsets");
-        this.populateList(document,
-                          "PanelUI-characterEncodingView-autodetect",
-                          "detectors");
-      }
-      this.updateCurrentDetector(document);
-      this.updateCurrentCharset(document);
-    },
-    onCommand: function(aEvent) {
-      let node = aEvent.target;
-      if (!node.hasAttribute || !node.section) {
-        return;
-      }
-
-      let window = node.ownerGlobal;
-      let section = node.section;
-      let value = node.value;
-
-      // The behavior as implemented here is directly based off of the
-      // `MultiplexHandler()` method in browser.js.
-      if (section != "detectors") {
-        window.BrowserSetForcedCharacterSet(value);
-      } else {
-        // Set the detector pref.
-        try {
-          let str = Cc["@mozilla.org/supports-string;1"]
-                      .createInstance(Ci.nsISupportsString);
-          str.data = value;
-          Services.prefs.setComplexValue("intl.charset.detector", Ci.nsISupportsString, str);
-        } catch (e) {
-          Cu.reportError("Failed to set the intl.charset.detector preference.");
-        }
-        // Prepare a browser page reload with a changed charset.
-        window.BrowserCharsetReload();
-      }
-    },
-    onCreated: function(aNode) {
-      const kPanelId = "PanelUI-popup";
-      let document = aNode.ownerDocument;
-
-      let updateButton = () => {
-        if (this.maybeDisableMenu(document))
-          aNode.setAttribute("disabled", "true");
-        else
-          aNode.removeAttribute("disabled");
-      };
-
-      if (this.currentArea == CustomizableUI.AREA_PANEL) {
-        let panel = document.getElementById(kPanelId);
-        panel.addEventListener("popupshowing", updateButton);
-      }
-
-      let listener = {
-        onWidgetAdded: (aWidgetId, aArea) => {
-          if (aWidgetId != this.id)
-            return;
-          if (aArea == CustomizableUI.AREA_PANEL) {
-            let panel = document.getElementById(kPanelId);
-            panel.addEventListener("popupshowing", updateButton);
-          }
-        },
-        onWidgetRemoved: (aWidgetId, aPrevArea) => {
-          if (aWidgetId != this.id)
-            return;
-          aNode.removeAttribute("disabled");
-          if (aPrevArea == CustomizableUI.AREA_PANEL) {
-            let panel = document.getElementById(kPanelId);
-            panel.removeEventListener("popupshowing", updateButton);
-          }
-        },
-        onWidgetInstanceRemoved: (aWidgetId, aDoc) => {
-          if (aWidgetId != this.id || aDoc != document)
-            return;
-
-          CustomizableUI.removeListener(listener);
-          let panel = aDoc.getElementById(kPanelId);
-          panel.removeEventListener("popupshowing", updateButton);
-        }
-      };
-      CustomizableUI.addListener(listener);
-      if (!this.charsetInfo) {
-        this.charsetInfo = CharsetMenu.getData();
-      }
-    }
-  }, {
-    id: "email-link-button",
-    tooltiptext: "email-link-button.tooltiptext3",
-    onCommand: function(aEvent) {
-      let win = aEvent.view;
-      win.MailIntegration.sendLinkForBrowser(win.gBrowser.selectedBrowser)
-    }
-  }, {
-    id: "containers-panelmenu",
-    type: "view",
-    viewId: "PanelUI-containers",
-    hasObserver: false,
-    onCreated: function(aNode) {
-      let doc = aNode.ownerDocument;
-      let win = doc.defaultView;
-      let items = doc.getElementById("PanelUI-containersItems");
-
-      let onItemCommand = function (aEvent) {
-        let item = aEvent.target;
-        if (item.hasAttribute("usercontextid")) {
-          let userContextId = parseInt(item.getAttribute("usercontextid"));
-          win.openUILinkIn(win.BROWSER_NEW_TAB_URL, "tab", {userContextId});
-        }
-      };
-      items.addEventListener("command", onItemCommand);
-
-      if (PrivateBrowsingUtils.isWindowPrivate(win)) {
-        aNode.setAttribute("disabled", "true");
-      }
-
-      this.updateVisibility(aNode);
-
-      if (!this.hasObserver) {
-        Services.prefs.addObserver("privacy.userContext.enabled", this, true);
-        this.hasObserver = true;
-      }
-    },
-    onViewShowing: function(aEvent) {
-      let doc = aEvent.target.ownerDocument;
-
-      let items = doc.getElementById("PanelUI-containersItems");
-
-      while (items.firstChild) {
-        items.firstChild.remove();
-      }
-
-      let fragment = doc.createDocumentFragment();
-      let bundle = doc.getElementById("bundle_browser");
-
-      ContextualIdentityService.getIdentities().forEach(identity => {
-        let label = ContextualIdentityService.getUserContextLabel(identity.userContextId);
-
-        let item = doc.createElementNS(kNSXUL, "toolbarbutton");
-        item.setAttribute("label", label);
-        item.setAttribute("usercontextid", identity.userContextId);
-        item.setAttribute("class", "subviewbutton");
-        item.setAttribute("data-identity-color", identity.color);
-        item.setAttribute("data-identity-icon", identity.icon);
-
-        fragment.appendChild(item);
-      });
-
-      fragment.appendChild(doc.createElementNS(kNSXUL, "menuseparator"));
-
-      let item = doc.createElementNS(kNSXUL, "toolbarbutton");
-      item.setAttribute("label", bundle.getString("userContext.aboutPage.label"));
-      item.setAttribute("command", "Browser:OpenAboutContainers");
-      item.setAttribute("class", "subviewbutton");
-      fragment.appendChild(item);
-
-      items.appendChild(fragment);
-    },
-
-    updateVisibility(aNode) {
-      aNode.hidden = !Services.prefs.getBoolPref("privacy.userContext.enabled");
-    },
-
-    observe(aSubject, aTopic, aData) {
-      let {instances} = CustomizableUI.getWidget("containers-panelmenu");
-      for (let {node} of instances) {
-	if (node) {
-	  this.updateVisibility(node);
-	}
-      }
-    },
-
-    QueryInterface: XPCOMUtils.generateQI([
-      Ci.nsISupportsWeakReference,
-      Ci.nsIObserver
-    ]),
-  }];
-
-let preferencesButton = {
-  id: "preferences-button",
-  defaultArea: CustomizableUI.AREA_PANEL,
-  onCommand: function(aEvent) {
-    let win = aEvent.target.ownerGlobal;
-    win.openPreferences();
-  }
-};
-if (AppConstants.platform == "macosx") {
-  preferencesButton.tooltiptext = "preferences-button.tooltiptext.withshortcut";
-  preferencesButton.shortcutId = "key_preferencesCmdMac";
-} else {
-  preferencesButton.tooltiptext = "preferences-button.tooltiptext2";
-}
-CustomizableWidgets.push(preferencesButton);
-
-if (Services.prefs.getBoolPref("privacy.panicButton.enabled")) {
-  CustomizableWidgets.push({
-    id: "panic-button",
-    type: "view",
-    viewId: "PanelUI-panicView",
-    _sanitizer: null,
-    _ensureSanitizer: function() {
-      if (!this.sanitizer) {
-        let scope = {};
-        Services.scriptloader.loadSubScript("chrome://browser/content/sanitize.js",
-                                            scope);
-        this._Sanitizer = scope.Sanitizer;
-        this._sanitizer = new scope.Sanitizer();
-        this._sanitizer.ignoreTimespan = false;
-      }
-    },
-    _getSanitizeRange: function(aDocument) {
-      let group = aDocument.getElementById("PanelUI-panic-timeSpan");
-      return this._Sanitizer.getClearRange(+group.value);
-    },
-    forgetButtonCalled: function(aEvent) {
-      let doc = aEvent.target.ownerDocument;
-      this._ensureSanitizer();
-      this._sanitizer.range = this._getSanitizeRange(doc);
-      let group = doc.getElementById("PanelUI-panic-timeSpan");
-      BrowserUITelemetry.countPanicEvent(group.selectedItem.id);
-      group.selectedItem = doc.getElementById("PanelUI-panic-5min");
-      let itemsToClear = [
-        "cookies", "history", "openWindows", "formdata", "sessions", "cache", "downloads"
-      ];
-      let newWindowPrivateState = PrivateBrowsingUtils.isWindowPrivate(doc.defaultView) ?
-                                  "private" : "non-private";
-      this._sanitizer.items.openWindows.privateStateForNewWindow = newWindowPrivateState;
-      let promise = this._sanitizer.sanitize(itemsToClear);
-      promise.then(function() {
-        let otherWindow = Services.wm.getMostRecentWindow("navigator:browser");
-        if (otherWindow.closed) {
-          Cu.reportError("Got a closed window!");
-        }
-        if (otherWindow.PanicButtonNotifier) {
-          otherWindow.PanicButtonNotifier.notify();
-        } else {
-          otherWindow.PanicButtonNotifierShouldNotify = true;
-        }
-      });
-    },
-    handleEvent: function(aEvent) {
-      switch (aEvent.type) {
-        case "command":
-          this.forgetButtonCalled(aEvent);
-          break;
-      }
-    },
-    onViewShowing: function(aEvent) {
-      let forgetButton = aEvent.target.querySelector("#PanelUI-panic-view-button");
-      forgetButton.addEventListener("command", this);
-    },
-    onViewHiding: function(aEvent) {
-      let forgetButton = aEvent.target.querySelector("#PanelUI-panic-view-button");
-      forgetButton.removeEventListener("command", this);
-    },
-  });
-}