Privacy Badger
lastmod 2026-11-10created 2025-10-022 edits
Privacy Badger is a free browser extension from the Electronic Frontier Foundation (EFF) that automatically blocks third-party trackers that follow users across websites. Unlike an ad blocker, it does not rely only on a predefined blocklist; instead, it decides what to block based on observing whether the same domain identifies the user across multiple sites. Because its goal is to stop trackers, it leaves ads that do not track you alone. It can be installed on Chrome, Firefox, Edge, and other browsers.
EFF's free browser extension for blocking web surveillance