With Windows 8 knocking at our door, Mozilla have unleashed a preview of Firefox for Windows 8, as you can see from the photo below, it is not looking too bad at all.
This version is from the latest nightly build of Firefox for Windows 8, and is available for download right now if you'd like to try it out. This preview of Firefox for Windows 8 includes "a new Metro style Firefox Start page, support for Firefox Sync, Metro touch and swipe gestures, integration with Windows 8 'charms', and a simple but powerful Australis interface that is streamlined, modern, and beautiful."
Mozilla has touted this nightly version to be part of their "Elm" development branch, and will be auto-updated as their development of the browser goes on. We should see the usual improvements to the browser as time passes, but for now the preview is all we have.