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How do I go back to the last version of Firefox instead of Firefox 4?

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There are so many things wrong with 4 then the previous to mention here. I just want to go back to 3.6.15. How do I do that?

There are so many things wrong with 4 then the previous to mention here. I just want to go back to 3.6.15. How do I do that?

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http://www.mozilla.com/en-US/firefox/all-older.html


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