Current stable version of Firefox browser is 3.6, but if you want to try version 3.7 then its pre-alpha version is available for download. Remember its alpha version, so there might be few bugs and you may find some problem. But its always exiting to test new products. The version 3.7 looks more attractive with glass, translucent and glossy buttons. You will feel some 3D type look.
Download Firefox 3.7 alpha