3 ms·

https://addons.mozilla.org/en-US/firefox/addon/matte-black-theme/ https://addons.mozilla.org/en-US/firefox/addon/matte-black-t... (not affiliated) It has black

by noxer 5y ago

https://addons.mozilla.org/en-US/firefox/addon/matte-black-theme/ https://addons.mozilla.org/en-US/firefox/addon/matte-black-t... (not affiliated) It has black right-click menu