Firefox is developing a command line tool
Recently I have found Firefox a bit frustrating with updates coming a bit too often to my taste. However, I am really looking forward to Firefox 16 to be able to work with the developer command line tool.
This tool will allow you to work much more productively for your web development stuff by making functionalities quickly accessible, but also adding new functionalities. You can read more about it on this article on the Mozilla blog or by watching the following video.