I know there is a unity plugin for browser, but they said at Google IO that it would run on NaCl, I don't know if it's already available or not to the general p

I know there is a unity plugin for browser, but they said at Google IO that it would run on NaCl, I don't know if it's already available or not to the general public. NaCl is not HTML5 but it's possible that the peace of bytecode is stored into the browser using HTML5 local storage so that you don't need to redownload the whole game every time you use it, just a guess though.