Issue 3347 - Adblock Plus UI broken after bug 1182546 landing

lib/ui.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 267 matching lines @@
   {
     // We should call initDone once both overlay and filters are loaded
     let overlayLoaded = false;
     let filtersLoaded = false;
     let sessionRestored = false;
 
     // Start loading overlay
     let request = new XMLHttpRequest();
     request.mozBackgroundRequest = true;
     request.open("GET", "chrome://adblockplus/content/ui/overlay.xul");
+    request.channel.owner = Utils.systemPrincipal;
     request.addEventListener("load", function(event)
     {
       if (onShutdown.done)
         return;
 
       this.processOverlay(request.responseXML.documentElement);
 
       // Don't wait for the rest of the startup sequence, add icon already
       this.addToolbarButton();
 
@@ skipping 1630 matching lines @@
   ["abp-command-contribute-hide", "command", UI.hideContributeButton.bind(UI)],
   ["abp-command-toggleshownotifications", "command", Notification.toggleIgnoreCategory.bind(Notification, "*", null)]
 ];
 
 onShutdown.add(function()
 {
   for (let window of UI.applicationWindows)
     if (UI.isBottombarOpen(window))
       UI.toggleBottombar(window);
 });