With Firefox, follow the steps below to enable Windows authentication for your servers.
1. Open Firefox 2.x or 3.x
2. Navigate to the url "about:config"
3. Locate the following preference names and set their value with the list of servers separated with comma.
- network.automatic-ntlm-auth.trusted-uris
- network.negotiate-auth.delegation-uris
- network.negotiate-auth.trusted-uris
Your value should look something like this: localhost,myserverA,myserverB