Do you hate it when web sites automatically open pop-up windows full of advertisements or other undesirable content when you arrive at or depart from a web site? OnTrack! is a small program that works with your browser to filter out these browser commands, thereby preventing these extra windows from opening. OnTrack! runs automatically in the background, starting up when you start your web browser. Since OnTrack! only filters out commands for windows that are opened without user interaction, all other web page functionality remains intact while you browse.