A few months ago, we saw Flash Player 11 and AIR 3 with Stage3D support, since we shipped we have seen great response from the developers and amazing content being developed. Today, over 50% of users with Flash Player 11 will enjoy full hardware acceleration for Stage3D content.
See more details from blog of the producers of Flash Player.
http://blogs.adobe.com/flashplayer/2012/01/introducing-flash-player-11-2-and-air-3-2-beta4.html
Didnt try out the flash version of Angry birds online facebook. clicked on the link from the above and it took me to the facebook angry birds page. This version of angry birds has got added features. Amazing stuff. More features than the normal version that we see on the chrome. Awesome features added in facebook angry birds version. Totally enjoyable game in facebook. play it guys. You also get features such as speed of catapult and other things.