Internet Junkbuster - Version 2.0.2-6 Blocks unwanted banner ads and protects your privacy from cookies and other threats. It's free under the GPL (no warranty), runs under *NIX, Windows and works with almost any browser. You need to clear you browser's cache and specify the proxy-server, described in the documentation. This is a modified version which returns a blank GIF for blocked images by default. But you can configure this via the config files.