@GrzesiekC: I couldn't find any trace of a thunderbird apparmor profile in official Ubuntu packages (apart from the ubuntu-email abstraction). So I'm not sure where this profile you have enabled on your machine comes from, but not from the archive, that's for sure. I'd suggest disabling it:
sudo apparmor_parser -R thunderbird and create a symlink to the overly strict profile in /etc/apparmor.d/disable. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1850064 Title: Please upgrade it to 68.x on Ubuntu 18.04 LTS Status in thunderbird package in Ubuntu: Fix Released Status in thunderbird source package in Bionic: Fix Committed Bug description: Now the official upgrade way from 60 to 68 got open by mozilla. Plus there are security fixes and performance enhancements. https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#thunderbird68.2 NOTE TO SRU TEAM: Please do not release this package without consulting first. This is a security update pushed via -proposed to get a bit more testing. Will be released via it's own processes. Packages that are part of this security update: thunderbird, mozilla- devscripts, jsunit and enigmail. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1850064/+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