How to Disable Proxy Settings in Firefox
Proxy settings are useful to help keep a server secure. But if you are using a computer on a Local Area Network (LAN) that is already secure, you may need to disable your proxy settings to avoid communication conflicts. You can easily do so using the Firefox Internet browser.
Click the "Firefox" button in the upper left of the Firefox browser menu and then click "Options." The Options window will appear.
Select the "Advanced" tab.
On the "Advanced" tab, click the "Network" tab and then the "Settings" button.
Select the option that says "No Proxy."
Click "OK" and then click "OK" again to disable the proxy settings.