Since I discovered the existence of global menu on Plasma, I’ve been searching for a version of Firefox that supports it. While I’ve found patches for it, I don’t know if it still works and have the patience to compile it.
Kudos if it’s in the AUR pre-compiled.
If you don’t know what global menu is it just moves the toolbar to any panel you want like in the attachment.
EDIT: Compiled firefox-globalmenu from the AUR, turns out it doesn’t work with wayland :(
The firefox fork for Garuda Linux afaik has global menu support. Check out Fire dragon.
Tried it both on wayland and x11, didn’t work sadly