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I recently upgraded to Firefox 4, but now one web site will not allow me access. Can I revert to the previous Firefox edition, and if so, how. I use XP Professional.

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I recently upgraded to Firefox 4, but now one web site will not allow me access. Can I revert to the previous Firefox edition, and if so, how. I use XP Professional.

I recently upgraded to Firefox 4, but now one web site will not allow me access. Can I revert to the previous Firefox edition, and if so, how. I use XP Professional.

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