I just updated my software on my desktop and have to say that I don’t like the new extra rounded look for the tabs and menus. Searching for ways to disable the new FF UI came up with hits for Final Fantasy as well as previous UI choices that weren’t very popular for Firefox. Even reducing it to just things posted in the last week didn’t give the answer.

But searching for “disable nove UI firefox” made the solution pop up in the AI summary. I was skeptical whether it even existed, but it worked: open about:config (literally just type that in the address bar if you never have done this before), click past the warning (be aware that just messing with settings in here can break your FF install), then search for “browser.nova.enabled” and click the button on the right side to toggle it off. Then close any FF windows you have open and relaunch it and you should see the more rectangular UI again.

Hopefully this nova disabled mode continues to work going forward. If not I might finally move to one of the forks.

Anyways, enjoy.