Does the flickering happen on a mozilla.org (not distro) Firefox, with a clean separate profile with no other changes (add-ons, prefs changed, etc.)? See [this SUMO page](https://support.mozilla.org/kb/profile- manager-create-remove-switch-firefox-profiles) for details on how to create a separate profile.
If so, can you provide the graphics portion of the about:support section of such a profile, please? -- 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/1940417 Title: On Wayland toolbar menus are sometimes invisible/flickering Status in Mozilla Firefox: New Status in firefox package in Ubuntu: Confirmed Bug description: User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0 Steps to reproduce: Open Downloads panel, Library or Application menu form the Toolbar by clicking on the corresponding icons. Actual results: From version 90 I noticed that Library or other items in the Toolbar won't open when I click it. Instead it flickers a few times on mouse movement - it looks like it opens but it's not visible, it becomes visible a fraction of a second when I move the mouse otherwise it's completely transparent. Which Toolbar icon this affects seems random. I tried to fix it by resetting the Toolbar and disabling extensions which have icons in the Toolbar. Then I noticed that Library was working normal again but Downloads or Application Menu wouldn't open. When this happened with the Application Menu I could barely see the contents of the menu by moving the mouse which made the menu flicker. The cursor was able to select menu items in the menu but it was completely transparent. In the enclosed screenshot you can see I selected the Library menu item but it isn't opened. Expected results: The menus in the Toolbar should open like they used to. --- ProblemType: Bug AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jeroen 3189 F.... pulseaudio /dev/snd/pcmC0D3p: jeroen 3189 F...m pulseaudio BuildID: 20210804193234 CasperMD5CheckResult: pass Channel: Unavailable CurrentDesktop: ubuntu:GNOME 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:352 DefaultProfileThemes: extensions.sqlite corrupt or missing DistroRelease: Ubuntu 21.04 ForcedLayersAccel: False InstallationDate: Installed on 2021-05-22 (87 days ago) InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420) IpRoute: default via 192.168.0.1 dev enp3s0 proto dhcp metric 20100 10.0.0.243 dev wgpia0 scope link 10.17.128.1 dev wgpia0 scope link 169.254.0.0/16 dev enp3s0 scope link metric 1000 192.168.0.0/24 dev enp3s0 proto kernel scope link src 192.168.0.102 metric 100 Package: firefox 91.0+build2-0ubuntu0.21.04.1 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.11.0-31.33-generic 5.11.22 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:352 Profile0PrefSources: prefs.js Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=91.0/20210804193234 (In use) RunningIncompatibleAddons: False Tags: wayland-session hirsute Uname: Linux 5.11.0-31-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 04/29/2014 dmi.bios.release: 4.6 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0602 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: VM60 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0602:bd04/29/2014:br4.6:svnASUSTeKComputerINC.:pnVM60:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnVM60:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.family: To be filled by O.E.M. dmi.product.name: VM60 dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: ASUSTeK Computer INC. To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1940417/+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
