The AppArmor profile covers the packaged version and the standard privileged install location. You are correct that it does not cover running firefox from an unprivileged user writable location like $HOME.
For unprivileged user writable locations like $HOME/bin/ the user has to deliberately make a privileged action like installing a profile for the location of the application. This applies to the appimage version run out of the users $HOME as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2046844 Title: AppArmor user namespace creation restrictions cause many applications to crash with SIGTRAP To manage notifications about this bug go to: https://bugs.launchpad.net/apparmor/+bug/2046844/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs