Greetings libretro.
Have you considered trying to branch out in a webformat also? I just discovered some other projects that delwe into the same thing, and seeing as team libretro have expressed, they want to be on everything, and a the web itself (not an chrome\fox addon) could be interesting.
there is the possible route of quakelive, wich installed itself into your system sort of, or straight up HTML5 code. let me show you some reference:
http://imrannazar.com/GameBoy-Emulation-in-JavaScript:-Interrupts http://www.webmonkey.com/2010/11/building-a-gameboy-emulator-in-html5-and-javascript/
-Loke