Tracking Cookie Demo
Demonstration of how tracking cookies work and persist across browsing sessions
This page was referenced in historical Facebook cookie research.
About Tracking Cookies
Tracking cookies are small pieces of data that websites store in your browser to track your activity across different sessions and sometimes across different websites.
How They Work
When you visit a website, it can set cookies that persist even after you close your browser or log out. These cookies can include:
- Session cookies: Expire when you close your browser
- Persistent cookies: Remain stored until they expire or you delete them
- Third-party cookies: Set by domains other than the one you're visiting
Privacy Implications
Tracking cookies can be used to build profiles of your browsing behavior, which is why many privacy-focused browsers and extensions now block third-party cookies by default.
Related Research
For more information about how cookies can persist after logout, see the Facebook logout research and the cookie data visualization.