I had the same problem on Ubuntu 13.04, and it solved after I uninstalled unity-webapps-facebookapps and unity-webapps-youtube
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/915496 Title: Firefox is freezing and the screen fades in and out like it's crashing. I sometimes don't have a cursor and sometimes nothing happens when I click on links. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/915496/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs