Mozilla has Unleashed a new Browser in the works, its alpha/experimental.
Minefield is, in fact, a way to glimpse into the future of Firefox, as it's a pre-release/alpha version of the Firefox browser.
After spending some time with Minefield, one thing is clear: the future of Firefox is fast. Lightning fast.
You can download the latest nightly build for Mac OS X, Linux, or Windows, but be warned: it's alpha code. While a quick scan of the Web shows few complaints as to stability, Minefield may not be for you. It doesn't support some of my favorite Firefox extensions (like Adblock Plus), but it actually has surprisingly good support for extensions, given that it's a fast-moving project.
Simply Download the file to your desktop, right click extract and double click the minefield binary, or create a launcher on your panel that executes firefox with -P to create a new profile.