Mozilla on Tuesday released a Web browser that it said is 10 times faster than its original browser. One year after releasing Firefox 3.0, the Mountain View, Calif.-based nonprofit released Firefox 3.5, which it said is two times faster than Firefox 3.0 and 10 times faster than Firefox 2.

The free open-source browser has better JavaScript performance; more privacy features, including a new private-browsing mode; and support for open video, audio and location browsing.

Mozilla said it created the browser for its more than 300 million active Firefox users. Windows, Linux, and Mac OS X operating systems can use Firefox 3.5, which is available in more than 70 languages.

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I agree that it's faster, but 2x faster ? Maybe, but I think slightly less. Maybe they are comparing un-tweaked FF3 vs un-tweaked FF3.5. If so then probably.