Issue 4361 - Pass all parameters to initEvent

safari/ext/content.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 (function()
 {
   // the safari object is missing in frames created from javascript: URLs.
   // So we have to fallback to the safari object from the parent frame.
   if (!("safari" in window))
     window.safari = window.parent.safari;
 
 
   /* Intialization */
 
   var beforeLoadEvent = document.createEvent("Event");
-  beforeLoadEvent.initEvent("beforeload");
+  beforeLoadEvent.initEvent("beforeload", false, true);
 
   // Decide if we should use the new content blocker API or not. (Note when the
   // API is used Safari breaks the canLoad function, making it either throw an
   // exception or return true when used.)
   var usingContentBlockerAPI = true;
   try
   {
     if (safari.self.tab.canLoad(beforeLoadEvent,
                                 {category: "request",
                                  payload: {type: "prefs.get",
@@ skipping 106 matching lines @@
 
         // Safari doesn't dispatch the expected events for elements that have
         // been prevented from loading by having their "beforeload" event
         // cancelled. That is a "load" event for blocked frames, and an "error"
         // event for other blocked elements. We need to dispatch those events
         // manually here to avoid breaking element collapsing and pages that
         // rely on those events.
         setTimeout(function()
         {
           var evt = document.createEvent("Event");
-          evt.initEvent(eventName);
+          evt.initEvent(eventName, false, false);
           event.target.dispatchEvent(evt);
         });
       }
     }, true);
   }
 
 
   /* Context menus */
 
   document.addEventListener("contextmenu", function(event)
@@ skipping 56 matching lines @@
   });
 
 
   /* Detecting extension reload/disable/uninstall (not supported on Safari) */
 
   ext.onExtensionUnloaded = {
     addListener: function() {},
     removeListener: function() {}
   };
 })();