I don't know if somebody changed something since 2022-05-03 (Comment #6 form @nrbrtx ), but my error message when starting firefox (snap) on Ubuntu Mate 22.04 in a guest session is different:
guest-qd9nle@ubrio22:~$ firefox cannot create user data directory: /tmp/guest-qd9nle/snap/firefox/1860: Permission denied I don't understand why there appears this Permission denied, as in /etc/apparmor.d/abstractions/lightdm the permission is: "owner /tmp/** rwlkmix,", so it seems to be ok. And more: the directory /tmp/guest- qd9nle/snap/firefox/1860 is created, despite the message. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1593407 Title: Guest session cannot run snaps Status in Light Display Manager: Confirmed Status in Snappy: Confirmed Status in Ubuntu MATE: Confirmed Status in Desktop: New Status in firefox package in Ubuntu: Confirmed Status in lightdm package in Ubuntu: Confirmed Status in snapd package in Ubuntu: Confirmed Status in firefox source package in Xenial: Confirmed Status in lightdm source package in Xenial: Confirmed Status in snapd source package in Xenial: Confirmed Bug description: I'm using Ubuntu 16.04. The guest session cannot execute snaps, because of a permission error. The LightDM's guest session AppArmor profile is not allowing access to /snap and other needed files and folders. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1593407/+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
