Interesting that there is such an add-on on firefox. You can also use this free app (works on firefox & IE ) to find out what commands are being sent via your browser to the camera. Its called "HttpWatch Basic 8.0.9" here is the link to the site...
http://www.httpwatch.com/features.htm
That is how I found out what the commands were to my camera and how I setup my scripts to control my camera.
Hope that will help you with your camera.