Issue 3263 - Advanced view button in filter assistant broken in Firefox nightlies

chrome/content/ui/composer.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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/>.
  */
 
-let nodes = null;
-let item = null;
-let advancedMode = false;
+var nodes = null;
+var item = null;
+var advancedMode = false;
 
 function init()
 {
   [nodes, item] = window.arguments;
 
   E("filterType").value = (!item.filter || item.filter.disabled || item.filter instanceof WhitelistFilter ? "filterlist" : "whitelist");
   E("customPattern").value = item.location;
 
   let insertionPoint = E("customPatternBox");
   let addSuggestion = function(address)
@@ skipping 372 matching lines @@
  * Selects or unselects all type checkboxes except those
  * that are disabled.
  */
 function selectAllTypes(/**Boolean*/ select)
 {
   for (let typeNode = E("typeGroup").firstChild; typeNode; typeNode = typeNode.nextSibling)
     if (typeNode.getAttribute("disabled") != "true")
       typeNode.checked = select;
   updateFilter();
 }