Mozilla and Google are working to bring their respective browsers to the Metro environment in Windows 8. Microsoft has created a special class of hybrid application specifically for browser vendors that will allow them to support both Metro and the traditional desktop with a single program.
The new application type, which is designated “Metro style enabled desktop browsers,” comes with a few caveats. In order to operate in the Metro environment, a browser will have to be configured as the platform’s default. Hybrid browsers that are not set as default will simply open in the traditional desktop when launched from the Metro environment.