rem: undoCloseTabItem.addEventListener("command", function() { undoCloseTab(0); }, false); 
add: histMenu.addEventListener("popupshowing", function() { HistoryMenu.populateUndoSubmenu(); }, false); 
context:     undoCloseTabItem.addEventListener("command", function() { undoCloseTab(0); }, false);
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/7c58249303e2a6dc8406141252836a6cc5b5525c/browser.js/clean/browser/base/content/browser.js