1

Every time I try to clear my cache or cookies, the system freezes and crashes. The spinning wheel continues and I have to force quit/reboot.

How can I clear my cache & cookies without Firefox freezing?

MacBook Pro, OS X 10.8 Mountain Lion

2

Reinstall Firefox by deleting it from /Applications and copying it from a fresh download.

If that does not help (which is likely), you may have a corrupt Firefox profile. To fix it:

  1. Use the Firefox Profile Manager, create a new profile and see if it works without crashing.
  2. If it does, then transfer data to the new profile from the old one.

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