gecko-dev/browser/base/content/chatWindow.xul

#filter substitution
<?xml version="1.0"?>

# -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

<?xml-stylesheet href="chrome://browser/content/browser.css" type="text/css"?>
<?xml-stylesheet href="chrome://browser/skin/" type="text/css"?>
<?xul-overlay href="chrome://browser/content/baseMenuOverlay.xul"?>
<?xul-overlay href="chrome://global/content/editMenuOverlay.xul"?>
<?xul-overlay href="chrome://browser/content/places/placesOverlay.xul"?>

#include browser-doctype.inc

<window id="chat-window"
        windowtype="Social:Chat"
        xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        title="&mainWindow.title;@PRE_RELEASE_SUFFIX@"
        onload="gChatWindow.onLoad();"
        onunload="gChatWindow.onUnload();"
        macanimationtype="document"
        fullscreenbutton="true"
# width and height are also used in socialchat.xml: chatbar dragend handler
        width="400px"
        height="420px"
        persist="screenX screenY width height sizemode">

  <script type="application/javascript" src="chrome://global/content/globalOverlay.js"/>
  <script type="application/javascript" src="chrome://global/content/contentAreaUtils.js"/>
  <script type="application/javascript" src="chrome://browser/content/nsContextMenu.js"/>

#include global-scripts.inc

<script type="application/javascript">

var gChatWindow = {
  // cargo-culted from browser.js for nonBrowserStartup, but we're slightly
  // different what what we need to leave enabled
  onLoad: function() {
    // Disable inappropriate commands / submenus
    var disabledItems = ['Browser:SavePage', 'Browser:OpenFile',
                         'Browser:SendLink', 'cmd_pageSetup', 'cmd_print',
                         'cmd_find', 'cmd_findAgain', 'cmd_findPrevious',
                         'cmd_fullZoomReduce', 'cmd_fullZoomEnlarge', 'cmd_fullZoomReset',
#ifdef XP_MACOSX
                         'viewToolbarsMenu', 'viewSidebarMenuMenu',
                         'viewFullZoomMenu', 'pageStyleMenu', 'charsetMenu',
#else
                         'Browser:OpenLocation', 'Tools:Search',
#endif
                         'Tools:Sanitize', 'Tools:DevToolbox',
                         'key_selectTab1', 'key_selectTab2', 'key_selectTab3',
                         'key_selectTab4', 'key_selectTab5', 'key_selectTab6',
                         'key_selectTab7', 'key_selectTab8', 'key_selectLastTab',
                         'viewHistorySidebar', 'viewBookmarksSidebar',
                         'Browser:AddBookmarkAs', 'Browser:BookmarkAllTabs',
                         'Browser:ToggleTabView', 'Browser:ToggleAddonBar'];

    for (let disabledItem of disabledItems) {
      document.getElementById(disabledItem).setAttribute("disabled", "true");
    }

    // initialise the offline listener
    BrowserOffline.init();
  },

  onUnload: function() {
    BrowserOffline.uninit();
  }
}

__defineGetter__("content", function()
  document.getElementById("chatter").contentWindow);

// define a popupnotifications handler for this window.  we don't use
// an iconbox here, and only support the browser frame for chat.
XPCOMUtils.defineLazyGetter(this, "PopupNotifications", function () {
  let tmp = {};
  Cu.import("resource://gre/modules/PopupNotifications.jsm", tmp);
  try {
    return new tmp.PopupNotifications(document.getElementById("chatter").content,
                                      document.getElementById("notification-popup"),
                                      null);
  } catch (ex) {
    console.error(ex);
    return null;
  }
});

</script>

#include browser-sets.inc

#ifdef XP_MACOSX
#include browser-menubar.inc
#endif

  <popupset id="mainPopupSet">
    <tooltip id="aHTMLTooltip" page="true"/>
    <menupopup id="contentAreaContextMenu" pagemenu="start"
               onpopupshowing="if (event.target != this)
                                 return true;
                               gContextMenu = new nsContextMenu(this, event.shiftKey);
                               if (gContextMenu.shouldDisplay)
                                 document.popupNode = this.triggerNode;
                               return gContextMenu.shouldDisplay;"
               onpopuphiding="if (event.target != this)
                                return;
                              gContextMenu.hiding();
                              gContextMenu = null;">
#include browser-context.inc
    </menupopup>

#include popup-notifications.inc

  </popupset>

  <commandset id="editMenuCommands"/>
  <chatbox id="chatter" flex="1"/>
</window>