I'm switching back from Opera to FF, since Opera 12.01 is complete crap. However, I really miss the ability to reopen closed tabs using Cmd+Z. There's an extension to use ctrl+z, but that gets annoying on a Mac real fast. I tried to map a keyboard shortcut in System Prefs but it requires me to enter the exact menu item, and there is no "Reopen Closed Tab" menu item. I tried getting an add-on to add this menu item, but it didn't seem to work. Any ideas?