Mozilla is planning to integrate Prism like features into future release of Firefox. Google Chrome has Google gears integrated into it which allows users to turn web apps into desktop apps and use some of them offline.

Although there are Prism add-on for Firefox, this integrated feature is supposed to provide more functionality.

When you visit a web-based application, you’d be able to click a button to turn it into a desktop app. This would create a desktop shortcut to the application and users would be able to open a window showing just that app. For certain applications, like the Flickr Uploader or Zoho Docs, Firefox might allow you to drag and drop files to upload or create file associations in your operating system so that every time you click on a Word document, for example, Zoho Docs would be opened instead of Microsoft Word. If you use Gmail a lot – after so many uses, Firefox may suggest to you, “Would you like to make Gmail a desktop application?” or “Would you like to add Gmail to your Quick Launch bar?”.