Mozilla CEO Gary Kovacs unveiled an experimental Firefox add-on Tuesday that will show you whoâ€™s tracking you across the inter webs. Several sites track online users for behavioral targeting purposes through cookies, itâ€™s a big business after all.
Install the add-on Collusion to track those who are tracking you. Once installed the add-on adds a red circle at the right bottom of the Add-on bar. If you click that button it will show you an interactive spider-web of trackers who are following your internet trail. In the Collusion options you can select to hear sound whenever a site sets a cookie.
Mozilla has also setup an online demo for collusion, just to show your data is being tracked when you visit sites like Imdb.com.