We have an Share Point intranet site hosted on IIS 7.0. For accessing this site windows authentication is required. All MAC machine are in windows domain. Whenever we access the site using Mozilla Firefox on MAC, we get a prompt for entering machine user name & password. Company does not wants us to use "Remember my password" option due to security issue. We have also installed the Add-on "Integrated Authentication for Firefox 2.0.1" but no luck :(. URL :- https://addons.mozilla.org/en-US/firefox/addon/integrated-auth-for-firefox/ We even tried updating following entries in about:config but still no luck 1. network.negotiate-auth.trusted-uris, 2. network.negotiate-auth.delegation-uris , 3. network.automatic-ntlm-auth.trusted-uris Please advise the step required for allowing Firefox to do integrated authentication like NTLM (Windows pass-through) just like Internet Explorer. Thanks