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why is it after about 4 minutes the browser wont work with out moving my mouse

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when i am on face book after about 4 minutes my browser firefox will not work with out me moving my mouse

URL of affected sites

http://facebook.com

所有回覆 (1)

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Do you have that problem when running in the Firefox SafeMode? http://support.mozilla.com/en-US/kb/Safe+Mode Don't select anything right now, just use "Continue in SafeMode."