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downloads FF4 but does not install

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  • Nzaghachi ikpeazụ nke Ryan

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have xp and FF 3.6. Tried to download FF4. Downloaded to "save file" but cannot install.  ???

have xp and FF 3.6. Tried to download FF4. Downloaded to "save file" but cannot install. ???''' '''

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Try using the update feature built into the browser. Please see this support article Update Firefox to the latest release