FireNES

FireNES - We recently learned about this Firefox add-on. (We are posting this since half the people reading this site uses Firefox.) You can play more than 2,500 Nintendo games in Firefox. If you grew up playing the original NES, you will appreciate this Firefox extension. It installed in a few seconds for us. No emulators or ROMs needed. You can get it here. FireNES requires Java. Remember it's for Firefox only! (Sometimes the download site is down.)

Watch a short video on FireNES