Hacker News Reader

> a single "Menu" entry that popped up the other menu items as an overlay menu would be great for me and would allow me to ditch the menubar

I do try to limit my add-ons as they often cause problems but I'm now trying out https://addons.mozilla.org/en-US/firefox/addon/4550 Compact Menu 2.

Tiny Menu, your link, disables the shortcut keys according to one review. Thanks though.