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 :(
This is something I’ve wanted for a very long time! It’s such a shame that this thread is full of people discussing whether or not a global menu is even a good thing. On Debian I have literally not been able to find a single browser that respects the global menu. I’m going to try everything in this thread, and hope something finally works!