rem: var windowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService(); 
add: var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService(); 
context: function locateHelpWindow(helpFileURI) {  var windowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService();  var windowManagerInterface = windowManager.QueryInterface( Components.interfaces.nsIWindowMediator);  var iterator = windowManagerInterface.getEnumerator( "mozilla:help");  var topWindow = null;  while (iterator.hasMoreElements()) {    var aWindow = iterator.getNext();    if (aWindow.getHelpFileURI() == helpFileURI) {      topWindow = aWindow;      break;      }    }  return topWindow;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/58ad7ad612cf759624c52f8d3473225eb3ce4026/contextHelp.js/buggy/extensions/help/resources/content/contextHelp.js