FWIW, I see the same symptoms with both Firefox and (just now) Thunderbird, and I am using the Nouveau NVidia drivers - I mention that as I seem to recall a vaguely similar sounding issue a couple of years ago that could be worked around why switching away from the NVidia proprietary drivers (which the OP in this seems to be using).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1686568 Title: Firefox Does Not Respond. Process can not be killed. Terminal commands to kill the process freeze. Logout Freeze. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1686568/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
