Eric Wise posted a great tip to enable Windows Authentication for your domains on Firefox. Very useful if you use the same password on your windows and website, but unfortunately this is for windows-only, I’m not sure if it could be enabled in the same way for Linux and OSX. From about:config enable the following preference names with the value of your domain separated with commas for example : localhost,server1,server2,serverX
network.automatic-ntlm-auth.trusted-uris
network.negotiate-auth.delegation-uris
network.negotiate-auth.trusted-uris
