To configure Firefox for Kerberos authentication, configure Firefox as follows:

  1. Start Firefox.
  2. Open a new tab, and then enter about:config in the address bar.
  3. Search for the network.negotiate-auth.trusted-uris preference name.
  4. Double-click to modify its value to include the base URL of your PingFederate environment (for example,
  5. Click OK and close the about:config tab.
  6. Optional: Exit Firefox.