Yeah, until this gets implemented, I'm still using Chrome for a lot of my browsing needs on Fedora. Really see no need to get a flash player that constantly goes out of date.
Didn't mean to sound so negative. Love firefox, keep on doing what you're doing guys. I should probably look into helping with this project if I can.
Shumway dev here. There are a lot of fascinating aspects to Shumway, it's basically a browser inside a browser and there are a million things to do, so ping us on IRC if you'd like to get involved, #shumway (irc.mozilla.org).