This GreaseMonkey script should work to keep you logged in at almost any sportsbook.
What makes this script different is that it doesn't do a simple autorefresh, but rather makes a HEAD request every 5 minutes of the last frame (or the entire page if no frames exist) on the page. By only submitting a HEAD request, the amount of data that's actually transmitted is extremely small (on the order of 300-400 bytes). The 5 minute timer is reset every time any page is requested from the site.
This script should effectively keep you logged-in to any HTTP-based site (sportsbook or otherwise, it most likely won't work properly with HTTPS sites) that times you out after a period of inactivity. It should do this without interfering in any way with your browsing
To install, you'll need the the FireFox add-in GreaseMonkey. If you already have GreaseMonkey you can
install the Stay Logged-In Any Book script by clicking here. If you installed the previous the Bookmaker/CRIS-only version you should uninstall that.
If you don't already have GreaseMonkey visit the
FireFox GreaseMonkey page, install the add-in by clicking the "Install Now" button, then restart Firefox and install from the above link.
(If you want to uninstall, go to Tools/Manage User Scripts, select "Stay Logged-In", and click Uninstall.)
To add new sportsbooks, you'll want to right click on the GreaseMonkey icon at the bottom right of your FireFox browser window (the icon that looks kind of similar to Donkey Kong), select "Manage User Scripts ..." and select "Stay Logged-In To Any Book" from teh left panel. Under "Included Pages" window click "Add" and then enter the url of the book twice as follows:
http://bookname.com/*
http://*.bookname.com/*
It's important to enter the book twice so that the script gets will get called for both
http://www.bookname.com/ AND for
http://bookname.com/.
It's a bit messy but it does seem to the trick.
If anyone has any suggestions on how to improve this, please post them here.
The script should generally work pretty well but of course I can offer no guarantees.