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Does Firefox 4.0.1 work well with Windows XP?

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Before I download the "new" Firefox 4.0.1 browser, I want to make absolutely sure it will work as well or better than 3.6.17.

Before I download the "new" Firefox 4.0.1 browser, I want to make absolutely sure it will work as well or better than 3.6.17.

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Using Windows XP, Intel Pentium M, and only 400 MB of RAM. While I haven't performed a full or appropriate test, it seems that Firefox 4 is faster and more efficient than the previous version. However, I myself will stay with 3.6 until more addons and toolbars support Firefox 4.

Thanks! handsomeorlandoman