Google's Chrome operating system has a big head start, with systems based on Chrome now being released. But Mozilla is working on its own vision of an operating interface centered around the browser. And we now have the first glimpse of this in a very early prototype release of the Webian Shell.
Like Chrome, the Webian Shell is a stripped-down interface that basically shows websites and applications--and not much else. However, unlike Chrome, which runs as the operating system on a device, the Webian Shell is (not surprisingly) a shell, at least for now, meant to run on top of existing operating systems such as Linux, Apple OS X, and Windows.
rest here