Bug 971443 - [System2] Instantiable Accessibility

https://bugzilla.mozilla.org/show_bug.cgi?id=971443

![screen shot 2014-05-06 at 10 47 41 pm](https://cloud.githubusercontent.com/assets/122602/2906842/936fdf56-d615-11e3-8c17-c210afcf2193.png)