rem: var focusedTop = Components.lookupMethod(aFocusedWindow, 'top') .call(aFocusedWindow); 
add: var focusedTop = new XPCNativeWrapper(aFocusedWindow, 'top').top; 
context: function isContentFrame(aFocusedWindow){  if (!aFocusedWindow)    return false;  var focusedTop = Components.lookupMethod(aFocusedWindow, 'top')                             .call(aFocusedWindow);  return (focusedTop == window.content);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/b560561599dd9201667ca4051fdbc733279ff95d/contentAreaUtils.js/buggy/xpfe/communicator/resources/content/contentAreaUtils.js