Another post listed the Arkenfox project, but that's focused on privacy & security, and secondarily performance -- not on UI/UX. (Changing some parameters might

Another post listed the Arkenfox project, but that's focused on privacy & security, and secondarily performance -- not on UI/UX. (Changing some parameters might affect contextmenu entries.) It's a thankless task - except by nontech browser users - to modify Fx's menus. Anybody remember the XUL-era addon 'Menu Editor'? So many years and so much effort to make it 'simple' for typical users to customize Menu Bar and context-menus; and always a target that refused to stay standard given Firefox version changes ALWAYS break something about the UI. Ultimately a valiant but unrewarded failure, no blame to the 'Menu Editor' developer(s) and userbase. As the writer will learn, the 'best' way to UI changes current (and XUL) Firefox is via userChrome.js/.css -- which has also had troubled history, as waves of main-office Fx developers have been openly hostile to promoting and supporting is functionalities. [0] https://github.com/arkenfox/user.js/ https://github.com/arkenfox/user.js/