Mozilla claims that its browser has the fastest SunSpider scores on the planet after its internal tests revealed that the company’s latest Firefox JavaScript engine — which includes the new JagerMonkey extension — outperforms both Google Chrome's V8 engine and Apple Safari's Nitro. The tests, apparently excluded Opera and Internet Explorer. Director of community development Asa Dotzler made the claim on Monday morning with a blog post.

While the new Firefox engine trails Chrome on Google's V8 benchmarks Mozilla has reached a milestone nonetheless.

Set to debut with Firefox 4 this fall, JaegerMonkey is an extension of the company's existing SpiderMonkey JavaScript engine. It operates alongside Mozilla's TraceMonkey extension, which debuted with Firefox 3.5 in June of last year.