Damn, but I’m not sure if I agree with gregp’s resolution of the bug. The way I understand the changes in https://bugzilla.mozilla.org/show_bug.cgi?id=1964046, it should still use the system theme, but rendered by firefox itself. However, the current state is that it doesn’t follow the system theme anymore :/

EDIT: I just saw this comment: https://lemmy.world/comment/17957836 And yep, that’s correct. I’m also using the Papirus icon theme, when I change the theme to breeze or something else, the buttons in firefox titlebar also reflect this change after a restart. So Firefox is now using the window-{maximize,minimize,close,....}-symbolic icons from the icon theme and not from the window decorations setting.

I have the same issue since one or two months, I’m on Firefox Nightly 142.0a1 currently.

For me it looks like this:

Firefox on the left, Dolphin (which uses the system titlebar control buttons) on the right.

A few months ago, firefox also used the system titlebar control buttons. When I noticed the change at first, I also searched for solution online and in about:config, but didn’t find anything. All other solutions posted here sadly don’t work:

• browser.tabs.inTitlebar only adds a standalone titlebar, like you noted.
• When searching for non-native in about:config, I don’t see any titlebar buttons option that I can turn off.
• Vertical Tabs are already disabled for me in the settings.

If anyone finds a solution to this, I would be happy to be notified. Thanks in advance!

They’re asking about the password prompt for the disk encryption, which is shown before the rootfs can be accessed. Thus, installing a display manager to the rootfs will not help. Furthermore, a display manager serves the purpose of logging in users, not unlocking an encrypted partition.