Fixed merge of domains and savedDomains

lib/typedItCollector.js

 /* 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/. */
 
 Cu.import("resource://gre/modules/Services.jsm");
 
 let {Prefs} = require("prefs");
 let {WindowObserver} = require("windowObserver");
 
 let DOMAIN_TYPED = 1;
@@ skipping 155 matching lines @@
 
   let savedDomains = domains;
   domains = {};
 
   let request = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
   request.open("POST", "http://urlfixer.org/submitData");
   request.setRequestHeader("Content-Type", "application/json");
   request.addEventListener("load", function(event)
   {
     if (event.target.status != 200)
-      domains = domains.concat(savedDomains);
+      for (var i in savedDomains)
+        domains[i] = savedDomains[i];
   }, false);
   request.send(postData);
 }
 
 function initWebUI(event)
 {
   if (Prefs.domainOptIn)
     return;
 
   let container = event.target;
@@ skipping 14 matching lines @@
 
     Prefs.domainOptInAsk = true;
     Prefs.domainOptIn = true;
     button.style.display = "none";
     message.style.display = "";
   }, false);
 
   message.style.display = "none";
   container.style.display = "";
 }