Firefox compatibility changes: Sidebar and Searchbar.

chrome/common/extensions/docs/server2/static/js/sidebar.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function() {
   /**
    * Toggles the display of nodes given the status of their associated controls.
    *
    * For each node passed to this function, check to see if a toggle has been
    * inserted into the node's parent.  If yes, change the state of the toggle
@@ skipping 47 matching lines @@
     var toc = document.getElementById('gc-toc');
     if (!toc)
       return;
     var items = toc.getElementsByTagName('li');
     var selectedNode = null;
     for (var i = 0; i < items.length; i++) {
       var item = items[i];
       if (item.className == 'leftNavSelected') {
         selectedNode = item;
       } else if (item.firstChild &&
-                 item.firstChild instanceof HTMLSpanElement) {
+                 item.firstChild.tagName == 'SPAN') {
         // Only assign toggles to text nodes in the sidebar.
         var a = document.createElement('a');
         a.className = 'toggle selected';
         a.appendChild(document.createTextNode(' '));
         a.onclick = function() {
           toggleList(this.parentNode.getElementsByTagName('ul'));
         };
         item.firstChild.onclick = function() {
           toggleList(this.parentNode.getElementsByTagName('ul'));
         };
         item.insertBefore(a, item.firstChild);
         toggleList(item.getElementsByTagName('ul'));
       }
     }
     if (selectedNode) {
       revealAncestor(selectedNode);
     }
   };
 
   initSidebar();
 })()