FightCode's editor is terrible, copying/pasting is silly. Let's add a button to save to disk as well as for loading from disk. Then we can use our editor of choice. On top of that, the simulator bots are rather silly, lets add the ability to replace them with bots you load off your system.
I'm writing this as a Firefox add-on because dotjs as wonderful as it is, doesn't give you privileged access, which means no file system access. I'll be using Jetpack because it makes add-on dev super easy.