>Shumway is a plugin. It's not a plugin. You probably need to take a look at the project and the code.
Yes, they say in that article is a browser extension, but effectively it is a core JS library that acts as a Flash Player virtual machine but executing inside of the JavaScript VM. I am not sure they are ever going to get it working completely but, IMO, this is the best chance for Flex's continued existence so I would not dismiss it out of hand. Mike