Username and password when use http://localhost in firefox but works in IE.

IIS uses Integrated Authentication and by default IE has the ability to use your windows user account...and need to configure this in fire fox.

here are the steps to do:

1) Open up Firefox and type in about:config as the url

2) In the Filter Type in ntlm

3) Double click "network.automatic-ntlm-auth.trusted-uris" and type in localhost and hit enter