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My screen suddenly turns brighter when I'm working with Chrome or Firefox. How can I turn this off?

My screen suddenly turns brighter when I'm working with Chrome or Firefox. How can I turn this off?

iMac, Mac OS X (10.5.8)

Posted on Nov 21, 2012 11:40 PM

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My screen suddenly turns brighter when I'm working with Chrome or Firefox. How can I turn this off?

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