Well, since I develop GM scripts for online games like this, I'll give some pointers.
You would need these add-ons for firefox:
xpath Checker (helps get tables using XML)
Firebug (great debugging tool)
Greasemonkey (what you need :P )
You will also need to catch up on the GM_Javascript commands
here.
I will help make a greasemonkey script, but I can't do it by myself. I'm already helping a friend get his
webgame running, recoding the GM script for another
webgame I play (which is the brother to my friends webgame), and working from home.
