Changing menu item names and locations is just stupid. A month later and I am still looking for "Undo Close Tab." Was it really that important to change the name to "Reopen Closed Tab?"
ctrl+shift+n to reopen the last window.
The funny thing is that I just tried to find the "shortcuts" list for Firefox and is is nowhere to be found in their menu or in Preferences! Do I need to find it on some webpage?!?