[Solved] Firefox asks intranet password

I have installed firefox and set it as my default browser. When my laptop is connected to my company LAN and when I happen to open an internal URL, firefox always prompts for password.

I did the following and now firefox does not ask for password.

1. Open the firefox tab and type in the address bar - about:config
   
2. Click on I'll be careful, I promise! button.
   
3. Find network.automatic-ntlm-auth.trusted-uris in the list
   
4. Type the internal website URLs as a comma separated string and click OK