Good Gear Guide
In Pictures: Mozilla previews app store in time fo...
Firefox Marketplace for the desktop versions of Firefox
When Firefox Marketplace is available for the desktop versions of Firefox, an app that you install will be launched as you would a typical desktop application. For example, under Windows 7 and older, a launch icon for an installed Firefox app will appear on the Windows desktop and under the Start menu. Mozilla is developing a future version of Firefox that would work with the Windows 8 app launcher UI, so Firefox Marketplace apps might be incorporated into the Windows 8 app ecosystem.
In Pictures: Mozilla previews app store in time for the holidays