Even though Alberto has marked this as Triaged, this is still wrong - as I said previously, it can't be a Mozilla bug if it's locking the machine solid. My bet would be graphics driver (since firefox does tend to push that hard).
Please answer for the ping test in my comment #7 and try the other graphics driver. ** Changed in: firefox (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1432492 Title: Firefox and Thunderbird freezes entire system after a few seconds of use To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1432492/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs