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Fire fox keeps locking up/freezing and running to slow. Other browser are running faster. How do I fix?

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Fire fox keeps freezing and at the top it says that firefox is not responding. Firefox is also running really slow. Other browsers like google gold are running real quick. How can I fix?

Fire fox keeps freezing and at the top it says that firefox is not responding. Firefox is also running really slow. Other browsers like google gold are running real quick. How can I fix?

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Is the problem still occurring on Firefox 8 ?

Possible that it is this one, see

Problem with freezing and hour glass comes on as if updating every 10 minutes or so and lasts for 52 seconds or more. | Firefox Support Forum | Firefox Help
https://support.mozilla.com/questions/894521