I reported this upstream as https://bugzilla.mozilla.org/show_bug.cgi?id=1823086. The answer I got ultimately was:
----- So there are two things that are different: * System titlebar is hidden: That's by design, you can go to right click -> Customize Toolbar ... and uncheck Titlebar to get the older behavior, see bug 1812289. * Selection color etc is different to other GTK3 apps (try apt install gedit for example). That's on the Snap config afaict. ----- I guess that makes sense, but it means that if we want the old behavior back, we'll have to change something on our end. ** Bug watch added: Mozilla Bugzilla #1823086 https://bugzilla.mozilla.org/show_bug.cgi?id=1823086 ** Changed in: firefox (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/2011758 Title: [REGRESSION] Firefox is ignoring Lubuntu's theme settings entirely Status in firefox package in Ubuntu: New Bug description: Steps to reproduce: 1. Boot the latest Lubuntu Lunar ISO. 2. Open KCalc and note the theming on the title bar. 3. Open Firefox. Expected result: Theming should be consistent between all apps, including KCalc and Firefox. Actual result: Firefox's title bar has distinctively GNOME theming, which looks out of place. Additional info: This bug seems to have coincided with bugs.launchpad.net/ubuntu/+source/openbox/+bug/2011753. Since both bugs appear Snap-related, this might not be coincidental. I'm wondering if maybe Firefox is ignoring or is unable to read XDG settings somehow? That seems like it might cause this. ProblemType: Bug DistroRelease: Ubuntu 23.04 Package: snapd 2.58.3+23.04ubuntu1 ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6 Uname: Linux 6.1.0-16-generic x86_64 ApportVersion: 2.26.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: LXQt Date: Wed Mar 15 20:48:51 2023 InstallationDate: Installed on 2023-03-16 (0 days ago) InstallationMedia: Lubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230314) SnapChanges: no changes found SourcePackage: snapd UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2011758/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
