As per comment #22 this issue is caused by Flash Player and does not crash Firefox. Marking Invalid.
** Changed in: firefox (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/728778 Title: adobe flash player plugin always crashes on youtube -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs