To everyone affected: Can you try running the following command in a terminal to temporarily unload the firefox apparmor profile, then launch firefox and comment here on whether this improves the situtation?
sudo apparmor_parser -R /etc/apparmor.d/usr.bin.firefox Thanks in advance! ** Changed in: firefox (Ubuntu) Importance: Undecided => Critical ** Changed in: firefox (Ubuntu) Assignee: (unassigned) => Olivier Tilloy (osomon) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1798999 Title: firefox windows are black in Ubuntu 18.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1798999/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs