The fact that the problem doesn't happen in safe mode suggests that it's hardware-accelerated rendering/compositing that is to blame.
After restarting firefox in normal mode, you might want to try instructions at https://support.mozilla.org/en-US/kb/upgrade-graphics- drivers-use-hardware-acceleration#w_i-still-have-problems-with-my- graphics-card-in-firefox. -- 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/1917300 Title: updated firefox 86.0 (64 bit) Status in firefox package in Ubuntu: Incomplete Bug description: updated firefox 86.0 (64 bit) starts and colored pixels blinking all around the screen; cannot use it any more. Using a ThinkPad SL 510, 4 GB RAM Ubuntu 20.04 LTS --- ProblemType: Bug AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: joe 878 F.... pulseaudio /dev/snd/controlC1: joe 878 F.... pulseaudio BuildID: 20210318103112 CasperMD5CheckResult: skip 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 20.04 ForcedLayersAccel: False InstallationDate: Installed on 2020-11-08 (137 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) IpRoute: default via 192.168.178.1 dev enp8s0 proto dhcp metric 100 169.254.0.0/16 dev enp8s0 scope link metric 1000 192.168.178.0/24 dev enp8s0 proto kernel scope link src 192.168.178.35 metric 100 Package: firefox 87.0+build3-0ubuntu0.20.04.2 PackageArchitecture: amd64 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18 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=87.0/20210318103112 RunningIncompatibleAddons: False Tags: focal Uname: Linux 5.8.0-48-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: 12/12/2011 dmi.bios.release: 1.73 dmi.bios.vendor: LENOVO dmi.bios.version: 6JET91WW (1.49 ) dmi.board.name: 28476NG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.ec.firmware.release: 1.48 dmi.modalias: dmi:bvnLENOVO:bvr6JET91WW(1.49):bd12/12/2011:br1.73:efr1.48:svnLENOVO:pn28476NG:pvrThinkPadSL510:rvnLENOVO:rn28476NG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad SL510 dmi.product.name: 28476NG dmi.product.version: ThinkPad SL510 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1917300/+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
