I know that we can allow Firefox to allow passing through of Windows credentials by editing the following about:config settings
--If using Kerberos--
network.negotiate-auth.trusted-uris
network.negotiate-auth.delegation-uris
--If using NTLM--
network.automatic-ntlm-auth.trusted-uris
and in Chrome by adding a command line switch
-–auth-negotiate-delegate-whitelist="*example.com"
However, these are both difficult to manage in a company wide setting. Does anyone have any good solutions to this problem?