Problem: pfsense webpage (192.168.1.1) will not load in Mozilla.

Browser: Mozilla – A “sometimes” fix is to “clear data” under “Cookies and Site Data”.

Open a tab and enter this into the address bar:

about:preferences#privacy

Under “Cookies and Site Data”,  choose “clear data”.

-or-

Open the menu in the Mozilla browser (three horizontal bars to the far right of the address url.

Choose Options – Privacy & Settings – Cookies and Site Data

Under “Cookies and Site Data”,  choose “clear data”.