Minefield is fast, furious… and incomplete. But its Javascript engine leaves Google’s Chrome and Webkit (Safari) in the dust. So what is Minefield? It’s pre-release/alpha version of a development branch of the Firefox browser. I that sounds too complicated, it wouldn’t be that much of a stretch to just call it Firefox 4 Alpha.

Sure, a lot of your plugins won’t work, and certain websites will make the browser crash. (Truthfully, that doesn’t make it all that much different from any other Mozilla upgrade I’ve run.) But if it’s speed you want Minefield has it in spades.

Download the latest nightly Minefield build for Mac OS X, Linux, or Windows.