If you have intranet sites using Windows Auth that are not fully qualified domain names (fqdn) (like http://companyintranet/) you probably noticed that Firefox constantly prompts your users to enter their windows authentication credentials. You can easily get Firefox to work like IE by allowing automatic logins.
- Go to “about:config”
- Filter the keys down to “network.automatic”
- Edit network.automatic-ntlm-auth.allow-non-fqdn value to true