Public bug reported:
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04.1 LTS Release: 20.04 Codename: focal $ apt-cache policy firefox firefox: Installed: 84.0.2+build1-0ubuntu0.20.04.1 Candidate: 84.0.2+build1-0ubuntu0.20.04.1 Version table: *** 84.0.2+build1-0ubuntu0.20.04.1 500 500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 75.0+build3-0ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages Ubuntu 20.04, Gnome desktop. Settings/Appearance/Standard Window Colors Selected. gtk issue? Kernel 5.4.0-64-generic #72-Ubuntu SMP Fri Jan 15 10:27:54 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux Nvidia gtx970, driver 460.32.03 (problem with Intel/i915 video also). To display the problem: Start with a Firefox window displaying the active color in its titlebar. Click on another window (like a gnome terminal). The color of the terminal window titlebar changes to the active color. The active window color of the Firefox titlebar should change to the inactive color, but does not. However the boarder of the Firefox window does change to the inactive color. Both the terminal and Firefox window now display their titlebar with the active color. The active color on the Firefox titlebar will remain, while other windows become active and inactive, with normal titlebar color switches. When the cursor passes over the Firefox (wrongly active) titlebar, the color switches to the inactive color. The Firefox window is the only one I have found that displays this problem. It helps to have distinct colors and wide enough boarders to see the problem, since the default is light gray/gray. To change the active color to yellow, and a slightly wider boarder, make a file ~/.config/gtk-3.0/gtk.css with the below contents (for active=yellow, inactive=gray): .titlebar { background: #999900; color:white; } .titlebar:backdrop { background: #777777; color:white; } decoration { border: 2px solid #999900; background: #999900; } decoration:backdrop { border: 2px solid #777777; background: #777777; } ** Affects: firefox (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913655 Title: Firefox Titlebar Does Not Turn To Inactive Color Until Cursor Passes Over It. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1913655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs