m.addEventListener("command", function() { for (var i = 0; i < undoItems.length; i++) undoCloseTab(); }, false); 
function (event) { FeedHandler.onLinkAdded(event); }, 
  m.addEventListener("command", function() {    for (var i = 0; i < undoItems.length; i++)      undoCloseTab();  }, false);
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/842c8ce63687e858eae1fb17693f18960f1ebdf7/browser.js/buggy/browser/base/content/browser.js