This is still an issue in 17.04. I've flipped this to being a security issue so hopefully it will get the attention it deserves.
$ ps aux | grep firefox root 4497 12.8 1.0 2211388 347188 ? SNl 10:07 0:03 /usr/lib/firefox/firefox https://wiki.ubuntu.com/ArtfulAardvark/ReleaseNotes ** Information type changed from Public to Public Security -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1174007 Title: release upgrader launches browser as root To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1174007/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
