There are four important components for HTTP proxy using: proxy ip address, port number, proxy login and password.
You can find it on my proxy list page. We will give little description how to use our proxy in some browsers.
It can look different for different version of browsers, if our screenshot do not match your browser you can try to use google search.

FireFox

After you will try to open some url - browser will show you popup with login/password request.

Internet Explorer

After you will try to open some url - browser will show you popup with login/password request.

FireFox

After you will try to open some url - browser will show you popup with login/password request.