Thanks Antonio, that demonstrates the problem very clearly. If you didn't change the default options, you should be in an X11 session. Just to make sure, can you please share the output of running the following command in a terminal?
echo $XDG_SESSION_TYPE Also, it would be useful if you could test another browser (e.g. chromium) and let us know whether you can observe the same problem with it. -- 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/1902900 Title: Workspaces menu flashes when moving between workspace A and workspace B having B Firefox with a video in full screen on it Status in firefox package in Ubuntu: Incomplete Bug description: As I said in the title the menu with the 3 workspaces flashes if you switch from a normal workspace to a workspace that has a fullscreen video in Firefox. How to reproduce * Open Firefox * Open a video in full screen (I tested prime video and twitch) * Press and keep pressed ctrl-alt and arrow to move between workspaces * When you reach the video workspaces still keep pressed ctrl-alt ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 82.0+build2-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65 Uname: Linux 5.4.0-52-generic x86_64 NonfreeKernelModules: wl AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sibilant 2096 F.... pulseaudio BuildID: 20201014125134 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Wed Nov 4 16:28:48 2020 DefaultProfileExtensions: extensions.sqlite corrupt or missing DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) DefaultProfileLocales: extensions.sqlite corrupt or missing DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:361 DefaultProfileThemes: extensions.sqlite corrupt or missing ForcedLayersAccel: False InstallationDate: Installed on 2020-11-03 (1 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) IpRoute: default via 192.168.1.254 dev wlp2s0 proto dhcp metric 600 169.254.0.0/16 dev docker0 scope link metric 1000 linkdown 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown 192.168.1.0/24 dev wlp2s0 proto kernel scope link src 192.168.1.92 metric 600 Profile0Extensions: extensions.sqlite corrupt or missing Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) Profile0Locales: extensions.sqlite corrupt or missing Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:361 Profile0PrefSources: prefs.js Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=82.0/20201014125134 (In use) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/12/2020 dmi.bios.vendor: Apple Inc. dmi.bios.version: 232.0.0.0.0 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-6F01561E16C75D06 dmi.board.vendor: Apple Inc. dmi.board.version: MacBookPro9,2 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-6F01561E16C75D06 dmi.modalias: dmi:bvnAppleInc.:bvr232.0.0.0.0:bd04/12/2020:svnAppleInc.:pnMacBookPro9,2:pvr1.0:rvnAppleInc.:rnMac-6F01561E16C75D06:rvrMacBookPro9,2:cvnAppleInc.:ct10:cvrMac-6F01561E16C75D06: dmi.product.family: MacBook Pro dmi.product.name: MacBookPro9,2 dmi.product.sku: System SKU# dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1902900/+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