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how to remove old screen saver

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I downloaded a new screen saver from Personas - I can see part of it at the top & bottom of the screen. When I close the browser my old screen saver appears. How can I remove it? Thanks

I downloaded a new screen saver from Personas - I can see part of it at the top & bottom of the screen. When I close the browser my old screen saver appears. How can I remove it? Thanks

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You can revert to the Default theme (Tools > Add-ons > Themes).

See Use themes to change the look of Firefox and http://kb.mozillazine.org/Themes (Lightweight theme)