From time to time I like checking out the bleeding edge version of some software. Firefox is always a good candidate for that, because of the many improvements in performance and features. I downloaded the Firefox 3.7a nightly build from http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/. It’s seems pretty stable on my computer and is obviously faster. Sunspider tests confirm my expectations of increased javascript performance which is roughly 40% faster than Firefox 3.5.5 on my machine.