[http://www.c3dl.org Canvase 3D JS Libary] is a js library for doing 3D in the browser. It uses the [https://addons.mozilla.org/en-US/firefox/addon/7171 canvas 3D extension]. To show off the abilities of the library we have been creating demos that people can try out from our web site. However, in order to try these demos, the user has to install the canvas 3D extension and this would not be possible of they are not using firefox 3 or if they have problems getting the extension. What we We would like a XUL Runner app that will create a "mini browser" with the extension packaged. The app would have a drop box that will get download any new demos that we put up on the website. The app should also include a source viewer that allows the user to see the js source for the demos along with the ability for the user to create and test their demos.