Mozilla is releasing the public beta of Firefox 3.1 (beta 1). There are several new features which look pretty cool.
First there is a 3D tab viewing. You get a 3D preview of the web page when you're switching tabs. Javascript performance is said to be much better and there is also a location awareness feature.
Rumors of a porn mode have also been floating but that feature will be added later. If you want to stay ahead of the crowd you can download the beta at the link below.