title: Configure Firefox 3.0.x to authenticate with Kerberos and not prompt
body: <p>I have an Intranet http application running on several machines in our Windows domain; everything works when using IE 7 because I can configure it to use Kerberos authentication and I've figured out how to get one of the intermediate machines to be Trusted for Delegation. </p>
  
  <p>I have researched and tried to get Firefox 3.0.10 to use Kerberos:</p>
  
  <ul>
  <li>navigate to about:config</li>
  <li>filter to <code>network.negotiate</code></li>
  <li>update <code>network.negotiate-auth.delegation-uris</code> and <code>network.negotiate-auth.trusted-uris</code> 
  with the following entries(separated by comma): <code>http://jupiter2000/trimbrokerclient,http://johnxp/fileservicedemo</code></li>
  </ul>
  
  <p>I have done this and even restarted Firefox and when I browse to the above sites on our LAN, I still get prompted for username and password and even when I supply them and the web page is loaded, I have some code in the app which displays the authentication method in effect and it is still NTLM, not Kerberos as when IE is used. </p>
  
  <p>Can someone comment on how to get Firefox usable on this Intranet application of mine? Thank you. </p>
  
  <p>p.s. while the names above are different, the app is the same. JUPITER2000 is IIS 6.0; JOHNXP is IIS 5.1. </p>