Issue 2426 - Open block.html as a popup window

popup.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
@@ skipping 66 matching lines @@
   }
 }
 
 function onUnload()
 {
   ext.onMessage.removeListener(onMessage);
 }
 
 function onMessage(message, sender, callback)
 {
-  if (message.type == "report-html-page" && sender.page._id == page._id)
+  if (message.type == "report-html-page" && sender.page.id == page.id)
     document.body.classList.remove("nohtml");
 }
 
 function toggleEnabled()
 {
   var disabled = document.body.classList.toggle("disabled");
   if (disabled)
   {
     var host = getDecodedHostname(page.url).replace(/^www\./, "");
     var filter = Filter.fromText("@@||" + host + "^$document");
@@ skipping 41 matching lines @@
 
 function toggleCollapse(event)
 {
   var collapser = event.currentTarget;
   Prefs[collapser.dataset.option] = !Prefs[collapser.dataset.option];
   collapser.parentNode.classList.toggle("collapsed");
 }
 
 document.addEventListener("DOMContentLoaded", onLoad, false);
 window.addEventListener("unload", onUnload, false);