After I started using it I was surprised who many website use the same marketing companies tracking devices. Given the widspread use of these services it would be pretty easy to build a comprehensive profile of a person.
https://addons.mozilla.org/en-US/firefo ... /ghostery/
I am just spreading the word, try it out!Ghostery sees the "invisible" web, detecting trackers, web bugs, pixels, and beacons placed on web pages by Facebook, Google Analytics, and over 600 other ad networks, behavioral data providers, web publishers - all companies interested in your activity.