Issue 3792 - Fix to support multiprocess firefox

lib/crawler.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";
 
 /**
  * @module crawler
@@ skipping 142 matching lines @@
       else
         window.close();
     }, false);
   },
 
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver, Ci.nsISupportsWeakReference])
 };
 
 function configureFrameScript()
 {
-  const frameScriptPath = info.addonRoot + "/lib/child/frameScript.js";
+  const info = require("info");
+  let frameScriptPath = info.addonRoot + "/lib/child/frameScript.js";
   Services.mm.loadFrameScript(frameScriptPath, true);
 
   onShutdown.add(() =>
   {
     Services.mm.removeDelayedFrameScript(frameScriptPath);
   });
 }
 
 /**
  * Starts the crawling session. The crawler opens each URL in a tab and stores
@@ skipping 102 matching lines @@
  * @param tab
  *    Tab in which we are interested in
  * @param {int} timeout
  *    Timeout in milliseconds
  * @return {Promise} promise which will be resolved with the received page info
  */
 function getPageInfo(tab, timeout)
 {
   return new Promise((resolve, result) =>
   {
-    const mm = tab.linkedBrowser.messageManager;
+    let mm = tab.linkedBrowser.messageManager;
     let timerID;
     let onDone = (msg) =>
     {
       mm.removeMessageListener("abpcrawler:pageInfoGathered", onDone);
       clearTimeout(timerID);
       resolve(msg.data);
     }
     mm.addMessageListener("abpcrawler:pageInfoGathered", onDone);
     timerID = setTimeout(() => onDone({data: {error: "timeout"}}), timeout);
   });
@@ skipping 43 matching lines @@
 
 function reportException(e)
 {
   let stack = "";
   if (e && typeof e == "object" && "stack" in e)
     stack = e.stack + "\n";
 
   Cu.reportError(e);
   dump(e + "\n" + stack + "\n");
 }