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If I go back to 3.6 how long will it be viable?

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Firefix 4 is like a downgrade... thanks for making me spend an hour trying to figure out how to make my browser experience how it used to be. If I go back to 3.6 how long will it be viable?

Firefix 4 is like a downgrade... thanks for making me spend an hour trying to figure out how to make my browser experience how it used to be. If I go back to 3.6 how long will it be viable?

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Probably another 6 months at least, if not longer.