Issue 3792 - Fix to support multiprocess firefox

lib/child/frameScript.js

 /*
  * This Source Code is subject to the terms of the Mozilla Public License
  * version 2.0 (the "License"). You can obtain a copy of the License at
  * http://mozilla.org/MPL/2.0/.
  */
 
 "use strict";
 
 const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
 
@@ skipping 24 matching lines @@
   onStateChange: function(webProgress, request, flags, status)
   {
     if (webProgress.DOMWindow == content &&
         (flags & Ci.nsIWebProgressListener.STATE_STOP))
     {
       // First time we receive STATE_STOP for about:blank and the second time
       // for our interested URL which is distinct from about:blank.
       // However we should not process about:blank because it can happen that
       // the message with information about about:blank is delivered when the
       // code in crawler.js is already waiting for a message from this tab.
-      // Another not interesting for us case is about:newtab.

[Wladimir Palant, 2016/09/30 07:43:12]

Nit: "Another case we are not interested in is about:newtab."

[sergei, 2016/09/30 13:27:23]

Done.

+      // Another case we are not interested in is about:newtab.
       if (content.location.protocol == "about:")
         return;
       let pageInfo = {channelStatus: status};
       if (request instanceof Ci.nsIHttpChannel)
       {
         try
         {
           pageInfo.headers = [];
           pageInfo.headers.push("HTTP/x.x " + request.responseStatus + " " + request.responseStatusText);
           request.visitResponseHeaders((header, value) => pageInfo.headers.push(header + ": " + value));
@@ skipping 64 matching lines @@
     result.source = serializer.serializeToString(document.documentElement);
   }
   catch(e)
   {
     reportException(e);
     result.errors.push("Cannot obtain page source code");
   }
 
   return result;
 }