I don’t know when the option was removed since I hadn’t updated Firefox on that machine in some time. Normally it’s in the customize menu at the bottom left. I can confirm that the option still exists in 104.0.2 since I also haven’t updated Firefox on my main machine (a different Ubuntu-based OS). And unless there’s some way in 115.0.1 to remove the title bar then I am extremely reluctant to update. Anyone know how to remove title bars on this update?