Ghostery sees the “invisible” web, detecting trackers, web bugs, pixels, and beacons placed on web pages by Facebook, Google Analytics, and over 1,000 other ad networks, behavioral data providers, web publishers – all companies interested in your activity.
Ghostery icon is shown on the mainpage and counts the tracking elements found on the website you are currently visiting. You can set in options automatic blocking on elements chosen by you, and i.e. you can leave only cookies which are really necessary for you. While the Ghostery blocks not only cookies but all tracking traffic, you can customize widely data which goes out from you.