I've accidentally tapped the F and D keys together when using Alt+D to reach the address bar a few times. There is no matching shortcut or close-window command in the File menu, yet it instantly closes the window. Can someone tell me why?
Edit: Clarified first sentence and added screen shot for the doubters:
Seems to do Close Window, the same thing as Ctrl+Shift+W or Alt+F4
In fact, if I do Alt+F, I see the command "Close Window Ctrl+Shift+W" where the d character is underlined. If I just Alt and then arrow-click the File menu, I don't see that command at all.