Public bug reported: If I start Firefox with in KDE Plasma with kwin compositing disabled, and the Firefox title bar is disabled via Customize, the whole window has a border. Otherwise my computer is configured to not have window borders, and other applications don't have such a border. I don't know how to make that border go away, besides enabling compositing. Playing with #main-window in userChrome.css shows that the border and margin I can set there exists inside the border which I'm trying to remove.
KWin has a hotkey for toggling compositing, found in Global Shortcuts. Default seems to be Alt+Shift+F12. Toggling compositing doesn't seem to change this immediately. What matters is the state of compositing when Firefox was started. I'm attaching a screenshot showing this border. ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: firefox 85.0.1+build1-0ubuntu0.20.10.1 [origin: Ubuntu] ProcVersionSignature: Ubuntu 5.8.0-43.49-generic 5.8.18 Uname: Linux 5.8.0-43-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu50.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: bgjenero 1908 F.... pulseaudio /dev/snd/controlC0: bgjenero 1908 F.... pulseaudio /dev/snd/controlC1: bgjenero 1908 F.... pulseaudio BuildID: 20210204182252 CasperMD5CheckResult: skip Channel: release CurrentDesktop: KDE Date: Thu Feb 18 15:15:39 2021 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) IpRoute: default via 192.168.1.1 dev eth0 proto static 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.44 Locales: extensions.sqlite corrupt or missing MostRecentCrashID: bp-99b8dfa6-8d6d-4541-919c-7d2960210213 PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:353 PrefSources: /usr/lib/firefox/defaults/pref/vendor-gre.js /usr/lib/firefox/defaults/pref/channel-prefs.js prefs.js user.js Profiles: Profile0 (Default) - LastVersion=85.0.1/20210204182252 (In use) RunningIncompatibleAddons: False SourcePackage: firefox SubmittedCrashIDs: bp-99b8dfa6-8d6d-4541-919c-7d2960210213 bp-f8fe1ebe-97ed-4eec-8e60-11f5d0210118 bp-e9cbbf6c-3c3f-430d-83ce-a0fca0210101 bp-f2129335-9559-437d-b537-6f4830210101 bp-70bc911e-707f-4f53-93fe-f2ebf0210101 Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to groovy on 2020-10-22 (119 days ago) dmi.bios.date: 06/19/2009 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F13 dmi.board.name: P35-DS3R dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF13:bd06/19/2009:svnGigabyteTechnologyCo.,Ltd.:pnP35-DS3R:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP35-DS3R:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: P35-DS3R dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Affects: firefox (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug groovy release-channel third-party-packages ** Attachment added: "Screenshot showing border." https://bugs.launchpad.net/bugs/1916074/+attachment/5464856/+files/Screenshot_2021-02-18_15-18-16.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1916074 Title: Firefox has border if started with kwin compositing disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1916074/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs