Downloaded the ubuntu-20.04.2.0-desktop-amd64.iso image and installed a virtual machine, updated it with apt update && apt dist-upgrade. Rebooted, tried firefox again and saw the same problem. Disabled most of the security and privacy restrictions in the firefox settings, same problem.
# apt info firefox ... Version: 86.0+build3-0ubuntu0.20.04.1 ... -- 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/1917816 Title: Firefox not loading gifv, gifs Status in firefox package in Ubuntu: New Bug description: Firefox 86.0-3, fresh installation of Ubuntu 20.04 with no additional repositories added other than for Google Chrome, no third-party drivers, etc. Full dist-upgrade run, rebooted and otherwise working fine. A version of firefox was pulled down using 'snap install firefox' and it did not have the same issues. Some gifs work, but no gifv so far. Not sure of the pattern. Example gifv from imgur.com: https://i.imgur.com/xFVwISe.gifv I've disabled all restrictions in the privacy and security settings. I've also started in safe-mode so no extensions. No reports of this issue on other operating systems or on https://bugzilla.mozilla.org No huge impact to me personally, but maybe something to look at. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: firefox 86.0+build3-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.8.0-44.50~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-44-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 BuildID: 20210222142601 CasperMD5CheckResult: skip Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Thu Mar 4 16:40:12 2021 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:348 DefaultProfileThemes: extensions.sqlite corrupt or missing ForcedLayersAccel: False InstallationDate: Installed on 2021-03-03 (1 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash 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:348 Profile0PrefSources: prefs.js Profile0Themes: extensions.sqlite corrupt or missing Profiles: Profile1 (Default) - LastVersion=None/None (Out of date) Profile0 - LastVersion=86.0/20210222142601 (In use) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/01/2020 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: GU502LW.309 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: GU502LW dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.ec.firmware.release: 3.8 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrGU502LW.309:bd09/01/2020:br5.17:efr3.8:svnASUSTeKCOMPUTERINC.:pnROGZephyrusM15GU502LW_GU502LW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnGU502LW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0: dmi.product.family: ROG Zephyrus M15 dmi.product.name: ROG Zephyrus M15 GU502LW_GU502LW dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1917816/+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
