Firefox - Can't log into SSRS Web Portal NTLM

If you keep getting prompted by Firefox for your logon credentials, then the logon goes away and pops right back up, try the following fix.

Enter about:config in Firefox Find the setting

network.automatic-ntlm-auth.trusted-uris 

Edit it to include the URL of your reporting server

Additional NOTES:

To do something like adding the intranet zone you may also have to edit

network.automatic-ntlm-auth.allow-non-fqdn to true

You can add an entire domain by adding:

http://myDomain.com

Multiple entries are either comma or space delimited