Mozilla has announced that the first Firefox 3.1 alpha is now available for download. This release, which is codenamed Shiretoko, includes Gecko 1.9.1 and adds a handful of new features.

Firefox 3.1 alpha 1 includes some user interface enhancements like a new graphical tab selector that shows page previews and a smarter filtering system for the Awesome Bar. This release also offers some nice improvements for web develo