Configure Mozilla Firefox to use a proxy server

This step by step guide will explain how to configure the browser Mozilla Firefox (on the example of version 41.0.2) to use a proxy to surf anonymously on the Internet. And since the client information can also be transmitted by cookies, we also take a look at how to delete cookies in Mozilla Firefox. Mozilla Firefox has the most powerful proxy server settings, because it may use the system proxy settings, or its own, allows to choose SOCKS version to use, and allows to use remote DNS queries in case of using SOCKS5 protocol.

First of all, you have to know your real IP address. It can be seen at the top of this page near «My IP», be sure that you are not using a proxy at the moment. Knowing your real IP is necessary, to ensure that everything is done correctly and the remote server cannot identify your real IP address after the browser configuration completion.

Before starting configuring the browser, you should choose a proxy server that matches your requirements in terms of anonymity, geography, supported protocols and other characteristics.

Cleaning up cookies in Mozilla Firefox

Call Options Tab of Mozilla Firefox (1,2) and choose the «Privacy» inset (3).

Cleaning up cookies in Mozilla Firefox

In the «Privacy» inset, click the «clear your recenthistory» link (4). In the opened window, select «Everything» time range to clear (5), expand the details (6), check «Cookies» (7) and «Offline Website Data» options (8), and then press the Clear now button (9) to clean up cookies (and other files, that may be used to track you).

Configure proxy server usage in Mozilla Firefox

On the Options Tab, choose the «Advanced» inset (1), then choose the «Network» section (2) and click the «Settings» button (3). In the opened «Connection settings» window, select «Manual proxy configuration» option (4) to make sure that only Mozilla Firefox will be affected by proxy server settings made.

Configuring Mozilla Firefox to use a proxy server step by step

If you are using an HTTP proxy. Type in the proxy server IP address and port («192.168.0.1» and «8080» in this example) in the appropriate fields of the «HTTP Proxy» section, like on the illustration below, make sure that other fields are empty.


Configuring Mozilla Firefox to use a HTTP proxy server

If you are using an HTTPS proxy.Type in the proxy server IP address and port («192.168.0.1» and «8080» in this example) in the appropriate fields of the «SSL Proxy» section, like on the illustration below, make sure that other fields are empty.


Configuring Mozilla Firefox to use a HTTPS proxy server

If you are using a SOCKS4 proxy.Type in the proxy server IP address and port («192.168.0.1» and «1080» in this example) in the appropriate fields of the «SOCKS Host» section, and check the «SOCKS v4» radio button, like on the illustration below, make sure that other fields are empty.

Configuring Mozilla Firefox to use a SOCKS proxy server

If you are using a SOCKS5 proxy.Type in the proxy server IP address and port («192.168.0.1» and «1080» in this example) in the appropriate fields of the «SOCKS Host» section, and check the «SOCKS v5» radio button, like on the illustration below, make sure that other fields are empty. Check the «Remote DNS» checkbox if you want to make DNS queries on the SOCKS proxy side instead of your host.

Configuring Mozilla Firefox to use a SOCKS proxy server

Close all settings windows by clicking OK buttons, now your Mozilla Firefox is configured to use a proxy. Now you can check your IP address and connection information, if you are using an anonymous proxy server, make sure, that your real IP address is not mentioned in the HTTP headers.

Cancellation of proxy server usage in Mozilla Firefox

In order to stop Mozilla Firefox use of proxy server, you need to select «No proxy» option in «Connection settings» window and press OK button.

How to configure other browsers to use a proxy server