If you are running Aurora, you can have almost all of this: go to about:config, search for "webide.enabled" and change the value to true It won't download and

If you are running Aurora, you can have almost all of this: go to about:config, search for "webide.enabled" and change the value to true It won't download and install the js libraries for you, but it does let you click "Create New App" and sets a bunch of stuff up for you. You can even install a Firefox OS simulator to test your app with.