I am amazed by Firefox 3.1 beta 2. Just look at the results of running the SunSpider JavaScript benchmark:
Firefox 3.0.5 gave a total time of 7974.0ms ± 2.4%
Firefox 3.1b2 gives a total time of 2867.0ms ± 4.3%
That’s an astounding speed increase. The browser feels snappier, especially with JavaScript-intensive sites like Gmail, which I usually [...]