It closes whole windows. You can try it safely by opening a second Firefox whole window, open a few tabs on it, and then Alt-F, D and the entire window closes. (Your first Firefox window is unaffected.)
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It closes whole windows. You can try it safely by opening a second Firefox whole window, open a few tabs on it, and then Alt-F, D and the entire window closes. (Your first Firefox window is unaffected.)
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.