How to Change Proxy Settings in Mozilla Firefox? Open Firefox Browser. Click the “Tools” Button in the Top Menu Bar and then Click “Options.” Click the “Advanced” Button. Go to the Network Tab. Click the “Settings” button under the “Connection” section. Select the “Manual Proxy Configuration” option and then enter in the IP Address and Port for the Different Protocols List.
If Your Proxy Does not Support Certain Protocols, Don’t Enter the IP address and Port Number for that Protocol.
Firefox will automatically use your local network connection to connect through that protocol instead of using your proxy. Click the “OK” button two times and the Settings Change is applied.