Google Gears support

Gears is a plug-in that extends your browser to create a richer platform for web applications. Google Gears plug-in will cache static data (like images) in customer's browser if in customer's browser is installed Google Gears. With Google Gears should application load much faster (after first load), because most of files will be loaded from cache of browser and not from server.
More details you can find here: http://gears.google.com/