Some of the cool new stuff coming in Firefox 4.
* New Add-Ons Builder based on Bespin
* HTML5 Video display
* Painting with Canvas
* Image manipulation with Canvas – pixel testing, face detection with opencivitas
* Green screen technologies in images and video by detecting pixel colours.
* HTML5 embedded inside SVG (yes!)
* SVG as an IMG
* SVG as a CSS background
* SVG filter/mask/clip
* SVG animations
* Inline SVG inside HTML5
* CSS3 (selectors, @font-face, 2D Transforms, Transitions, Shadow, Gradients ,calculations – calc(2em-10px) )
* APIs: Geolocation, Offline (IndexDB, localStorage, AppCache, FileAPI – binary content of a file input, file drag and drop, web workers, websockets)
* Websockets controller running the presentation from the mobile.
* WebGL