I think this might be at least related to https://bugzilla.mozilla.org/show_bug.cgi?id=1334778.
** Bug watch added: Mozilla Bugzilla #1334778 https://bugzilla.mozilla.org/show_bug.cgi?id=1334778 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1660031 Title: upgrade renders firefox unusable Status in firefox package in Ubuntu: Confirmed Bug description: Hi, I just apt-upgraded a 16.04 machine to the latest packages, which rendered firefox unusable. The firefox gui appears, but it does not show contents of webpages, refuses a login to an unencrypted (still secure because tunneled) webpage and blasts trillions of messages like [ 691.871185] audit: type=1400 audit(1485603229.158:2983): apparmor="DENIED" operation="mknod" profile="/usr/lib/firefox/firefox{,*[^s][^h]}" name="/dev/shm/org.chromium.fHVuSZ" pid=6325 comm=57656220436F6E74656E74 requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000 into the log. Looks like wrong or outdated apparmor settings keep firefox from running properly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1660031/+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
