Prism – Desktop platform for Web Applications
Currently Mozilla Lab is developing a new application, Prism, that treats your web applications and services like desktop applications. That’s it, you don’t need the browser to access your GMail, Google Calendar or Facebook account.
Now you can start to try it for Windows OS (it will be cross-platform later), but at this moment it doesn’t support the extensions yet. This should be on top of the wishlist of functions for Prism.