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Launching Firefox browser causes Lenovo laptop screen resolution to shift from optimal 1366X768 to undesirable 640X480.

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  • 1 has this problem
  • Last reply by philipp

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Any idea why?! And how to resolve?! It reverts to the undesirable resolution on every launch now, despite my 'fix' in Control Panel. The only relevant details I can add involve... 1) a Freeze which came from an undesirable tab that popped up in one of my three open windows, probably phishing or some such. 2) This was resolved by a PC Restore, followed by installation of some Mozilla-recommended security apps. Thank you!

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hi ZorbaBuddha, please right-click the firefox icon on your desktop & go to properties > compatibility - in this panel uncheck any compatibility options that might be set...