Does this happen when you run Firefox with a new profile? This can help determine if there is an error in firefox, or if the problem is caused by your specific combination of add-ons and settings. Instructions for doing this can be found at https://wiki.ubuntu.com/MozillaTeam/Bugs.
Also, when Firefox crashed, did you submit a crash report to Mozilla? Thanks! ** Changed in: firefox (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/833346 Title: launch failure, slow loading, lock computer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/833346/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs