I reported the bug upstream for Firefox - if you have a Bugzilla account on Mozilla and are affected, you could confirm it please :
https://bugzilla.mozilla.org/show_bug.cgi?id=1884347 ** Bug watch added: Mozilla Bugzilla #1884347 https://bugzilla.mozilla.org/show_bug.cgi?id=1884347 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to devhelp in 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 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
