As this bug affects Firefox its a possibility that a plugin or website may be affecting its stability. This bug could do with some more information. For example, do you have any other programs open at the time of X closing? What plugins do you currently have installed in Firefox and Which websites you are visiting at the time of the closure.
-- Unespecting crash clossing X session https://launchpad.net/bugs/74238 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
