Prism is designed to create a better environment for running your favorite web-based applications. Much of what we used to accomplish using an application running locally on our computers is moving into the web browser. Thanks to advances in web technology, these apps are increasingly powerful and usable. As a result, applications like Gmail, Facebook and Google Docs are soaring in popularity.
An excellent article “Prism 1.0 for Firefox…” in Marshable posted for Ben Parr can find more informattion.
WebSite Prism extension: https://addons.mozilla.org/en-US/firefox/addon/6665