No crash on Minefield
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b2pre) Gecko/20081028 Minefield/3.1b2pre
No crash on Minefield
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b2pre) Gecko/20081028 Minefield/3.1b2pre