I am using computer in which I have MAC OS X 10.7. I have recently update Mozilla Firefox in my computer and then it has started giving me annoying problem. Now whenever I start Mozilla Firefox in my computer at that time it works fine and then when I close on close button at that time it crashes. First I thought clearing the cache and cookies will solve this problem but after deleting the cache and cookies also I was facing same problem. I have also tried to solve this problem by starting the Mozilla Firefox with add on disabled but that does not make any difference. Before updating the Mozilla Firefox I was not facing this problem. if anyone knows how to solve this problem then let me know thank you in advance.