this post was submitted on 29 Jun 2025
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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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.non-native
inabout:config
, I don't see any titlebar buttons option that I can turn off.If anyone finds a solution to this, I would be happy to be notified. Thanks in advance!
If @Frellwit is right, this seems to be intended and not a bug :(
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.