Windows Domain Authentication with Firefox

"I think this will cover you:

http://markmonica.com/2007/11/20/firefox-and-integrated-windows-authentication/

How to configure Firefox

Open Firefox
In the address bar type: about:config
Firefox3.x and later requires you to agree that you will proceed with caution.
After the config page loads, in the filter box type: network.automatic

Modify network.automatic-ntlm-auth.trusted-uris by double clicking the row and enter http://www.replacewithyoursite.com

Multiple sites can be added by comma delimiting them such as http://www.replacewithyoursite.com, http://www.replacewithyourintranetsite.com"

"If you're not logged in as the Windows domain user, Firefox has no way to set a generic login for, say, *.blah.com.

Tracked as Mozilla Bug 589628."