To configure HTTP or Socks proxy in Mozilla Firefox on Windows, follow these steps.
Specify the IP address and port of the proxy. We recommend using Socks 5 proxy because at the moment it is the most anonymous protocol.
HTTP Proxy - type HTTP proxy
SSL Proxy - HTTPS proxy
FTP Proxy - usually uses the same HTTP or HTTPS proxies
Socks Host - type Socks data (enough to fit on a single line)
If you are using an HTTP proxy authorization, the window with the login and password will be immediately as soon as you try to access any website on the Internet.
Browsers does not support Socks proxy authorization. In such cases it is necessary to use the special program. For example, Proxifier.
More about configuring Proxifier on Windows.