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How do I rollback to last build-I Don't like 4.0

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how do I go back to the previous version of Firefox? I don't like 4.0

how do I go back to the previous version of Firefox? I don't like 4.0

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I don't either. It was slower and looked awful, with no option to change the design back for those who don't want a computer browser that looks like a smartphone's. I was able to find the old install .exe for 3.6.3 in my downloads folder. If you can't find your old one look for it on a friend's who hasn't updated yet.