Prism, previously known as WebRunner, is a product in development which integrates web applications with the desktop, allowing web applications to be launched from the desktop and configured independently of the default web browser. It is commonly used with Google AJAX Applications, such as Gmail and Google Docs.
The preview announcement of Prism was made in October 2007. The software is currently in its beta stage.
Reference:
http://en.wikipedia.org/wiki/Mozilla_Prism
