I think this is a really early stage Etherpad. Check out Etherpad's features if you can, you have your work cut out though http://etherpad.org
Mozilla and no doubt many others can easily deploy it on their servers:
Firepad is fully client-side code, so there's no server software for you to set up.
The other big reason you might use Firepad is to get all of the other goodies that Firebase provides, like the automatic scaling, Forge debugger, declarative security, etc.