why is it so amazing? Because it is an add-on that allows you to play thousands of different Nintendo games just installing the add-on. Forget ROMs and extra files, just install the add-on and enjoy all Nintendo games you used to play on your Super Nintendo, now in Firefox.
The list of advantages and features is really big: View the full list of games and choose the one you want to play, see the top played games, organize them,...
Once you choose the game, the game will start in a new tab, so you can play, pause and surf the net while playing.
Don't hesitate, Super Mario Bros, Zelda, Bubble Bobble, Castlevania, Donkey Kong and more are waiting for you in Firefox and FireNes, the definitive add-on for gamers.