While this idea is nice, I have a meta-idea: Since HTML5 introduce WebSocket, why don't we provide a plugin mechanism in browsers that allows downloadable site

While this idea is nice, I have a meta-idea: Since HTML5 introduce WebSocket, why don't we provide a plugin mechanism in browsers that allows downloadable site defined Internet protocols? In fact non-HTTP protocols been around in browsers since stone age, IE, Netscape and Firefox support Gopher in some degree. Chrome silently added libjingle for Bookmark Sync, it's even yields "P2P error" when something goes wrong. Opera has a BitTorrent built in. Browser is container + Internet IO, period. This idea should start within hacker & developer community first. I hope browsers could innovate as prosper as WinAmp developer ecosphere used to be. Not just a crappy HTTP requester+fancy HTML renderer with round corners, ogg-only audio, shinny canvas and 3D shit.