Proxy server settings can be automatically deployed to clients using the Web Proxy Auto-Discovery Protocol (WPAD). This protocol utilizes a Proxy Auto Config file (PAC), which can be provided via IIS. A Group Policy setting instructs web browsers on how to find the PAC file.

If you want to centrally manage proxy settings for the Mozilla browser in a network, a Group Policy is available. Unlike Google Chrome or Microsoft Edge, Firefox cannot only inherit the proxy configuration from Windows but can also receive it directly via GPO.