Issue exists in 47 and 47.0.1. in 46.0.1, I can configure NTLM and Network Negotiate settings to allow SSO for my companies intranet websites. Here are the settings I configure: 1) network.automatic-ntlm-auth.trusted-uris 2) network.negotiate-auth.delegation-uris 3) network.negotiate-auth.trusted-uris Same configuration breaks in 47 +