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Firefox won't open

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When I try to open Firefox the icon starts jumping a few seconds and then crash. I don't get any messages or anything. I have tried to re-install it time after time but still won't work! I worked a few days ago but Java did not work so I tried to re-install firefox and then this happened.

When I try to open Firefox the icon starts jumping a few seconds and then crash. I don't get any messages or anything. I have tried to re-install it time after time but still won't work! I worked a few days ago but Java did not work so I tried to re-install firefox and then this happened.

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Try to repair the disk permissions: http://thexlab.com/faqs/repairprocess.html

See also http://support.apple.com/kb/HT2963 Troubleshooting permissions issues in Mac OS X