Shumway is an HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assistance.
Try it out!
Live demo lives here. Firefox extension lives here
(read more about configuring the extension).
Other examples (via shumway inspector):
Want to get involved?
For more information about development, see the developer wiki, or find us on the #shumway IRC channel (irc.mozilla.org).
You can also clone the project with Git
$ git clone git://github.com/mozilla/shumway