Mozilla has been promising a version of Firefox designed for the new Windows 8 UI for a year now, and has trickled out a few details and previews since then. It's made a considerably bigger step this week though by releasing the browser into its Nightly channel, which lets anyone who's willing to venture beyond stable releases take it for a spin. As Mozilla's Asa Dotzler puts it, "there's plenty of work still to do, but
