The autopkgtest failure was resolved with a retry. I used ubuntu-release-upgrader 1:22.04.15 from jammy-proposed to verify this fix:
nr@clean-focal-amd64:~$ apt-cache policy firefox firefox: Installed: 107.0+build2-0ubuntu0.20.04.1 Candidate: 107.0+build2-0ubuntu0.20.04.1 Version table: *** 107.0+build2-0ubuntu0.20.04.1 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 75.0+build3-0ubuntu1 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages nr@clean-focal-amd64:~$ do-release-upgrade --proposed [ ... ] nr@clean-focal-amd64:~$ cat /tmp/ubuntu-release-upgrader-u4hfm_j_/DistUpgradeVersion.py VERSION = '22.04.15' nr@clean-focal-amd64:~$ apt-cache policy firefox firefox: Installed: 1:1snap1-0ubuntu2 Candidate: 1:1snap1-0ubuntu2 Version table: *** 1:1snap1-0ubuntu2 500 500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages 100 /var/lib/dpkg/status ** Tags removed: verification-needed verification-needed-jammy ** Tags added: verification-done verification-done-jammy -- 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/1964036 Title: Firefox icon missing from panel following Kubuntu upgrade 20.04->22.04 Status in firefox package in Ubuntu: Confirmed Status in ubuntu-release-upgrader package in Ubuntu: Fix Released Status in firefox source package in Jammy: New Status in ubuntu-release-upgrader source package in Jammy: Fix Committed Bug description: [Impact] By removing the firefox deb and installing the snap instead, ubuntu- release-upgrader is subverting the logic of the firefox transitional deb. [Test Case] Perform an upgrade from focal to jammy: $ do-release-upgrade On an affected system, the firefox deb will be removed by the upgrade, and the snap will be installed instead. On a fixed system, ubuntu- release-upgrader will not remove the firefox deb, and the deb will handle the transition to the snap. [Where problems could occur] If the patch was wrong, e.g. JSON syntax error or similar, it could mess up the remaining deb2snap entries. [Original Description] 1) lsb_release -rd Description: Ubuntu Jammy Jellyfish (development branch) Release: 22.04 (Kubuntu Jammy live session in QEMU VM) 2) apt-cache policy ubuntu-release-upgrader-core ubuntu-release-upgrader-core: Installed: 1:22.04.6 3) expected (upgrade from Kubuntu 20.04.3 -> 22.04. Reboot.) * Firefox icon on panel to be intact. * Clicked icon launches browser. * Icon tooltip/mouse hover to describe application. 4) happened instead * Icon is missing/replaced with a generic icon * Icon click produces error notification "Plasma Workspace - preferred://browser" * Icon tooltip/mouse hover appears, though is blank. Additional info: * firefox is still installed, works as expected. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu78 Architecture: amd64 CasperMD5CheckResult: unknown CrashDB: ubuntu CurrentDesktop: KDE DistroRelease: Ubuntu 22.04 InstallationDate: Installed on 2022-03-07 (2 days ago) InstallationMedia: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1) Package: ubuntu-release-upgrader (not installed) ProcVersionSignature: Ubuntu 5.15.0-18.18-generic 5.15.12 Tags: jammy dist-upgrade Uname: Linux 5.15.0-18-generic x86_64 UpgradeStatus: Upgraded to jammy on 2022-03-07 (2 days ago) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo VarLogDistupgradeXorgFixuplog: INFO:root:/usr/bin/do-release-upgrade running INFO:root:No xorg.conf, exiting _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1964036/+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