apt-get install libcanberra-gtk* did not work for me. Upgrade to 22.04 LTS did not work for me either.
My workaround was to remove Firefox snap completely and install install Firefox using apt as described below: sudo snap remove firefox cd ~/snap rm -r firefox sudo gedit /etc/apt/preferences.d/firefox-no-snap add lines below: Package: firefox* Pin: release o=Ubuntu* Pin-Priority: -1 sudo apt purge firefox sudo add-apt-repository ppa:mozillateam/ppa sudo apt-get update sudo apt install firefox echo 'Unattended-Upgrade::Allowed-Origins:: "LP-PPA- mozillateam:${distro_codename}";' | sudo tee /etc/apt/apt.conf.d/51unattended-upgrades-firefox Sources: https://www.debugpoint.com/2021/09/remove-firefox-snap-ubuntu/ https://ubuntuhandbook.org/index.php/2022/03/install-firefox-esr-ubuntu/ -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libcanberra in Ubuntu. https://bugs.launchpad.net/bugs/872172 Title: libcanberra-gtk0 should recommend Gtk2 and Gtk3 module to fix: Gtk- Message: Failed to load module "canberra-gtk-module" Status in libcanberra package in Ubuntu: Triaged Bug description: Trying to run any Gtk 3 application in Oneiric, I am getting the following message/error: % ubuntu-bug Gtk-Message: Failed to load module "canberra-gtk-module" libcanberra-gtk-module only ships this file: /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so When setting the GTK_PATH explicitly, it fails to load like this: % export GTK_PATH=:/usr/lib/gtk-2.0 % ubuntu-bug (apport-gtk:12816): Gtk-WARNING **: GTK+ module /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported. Gtk-Message: Failed to load module "canberra-gtk-module" The fix/workaround appears to be installing libcanberra-gtk3-module, or removing libcanberra-gtk-module, which is only being installed as a recommendation for transmission-gtk (in this case): % aptitude why libcanberra-gtk-module i libcanberra-gtk0 Recommends libcanberra-gtk-module % aptitude search '?depends(libcanberra-gtk0)' | awk '{print $2}' balsa gnome-panel gnome-session-canberra gnubg gok libbrasero-media1 libcanberra-gtk-dev libcanberra-gtk-module libcanberra-gtk0-dbg libcheese-gtk18 metacity transmission-gtk wallch xchat-gnome I think that libcanberra-gtk0 should not only recommend the Gtk 2 module, but also the Gtk 3 one. So the "Recommends: libcanberra-gtk-module" should become "Recommends: libcanberra-gtk-module, libcanberra-gtk3-module". WORKAROUND: 1. sudo apt-get install libcanberra-gtk3-module or 2. sudo apt-get purge libcanberra-gtk-module ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: libcanberra-gtk-module 0.28-0ubuntu10 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4 Uname: Linux 3.0.0-12-generic-pae i686 ApportVersion: 1.23-0ubuntu3 Architecture: i386 Date: Tue Oct 11 10:12:05 2011 EcryptfsInUse: Yes InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1) ProcEnviron: LC_TIME=de_DE.UTF-8 LANGUAGE=en_US:en PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/usr/bin/zsh SourcePackage: libcanberra UpgradeStatus: Upgraded to oneiric on 2011-09-29 (11 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libcanberra/+bug/872172/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp