Enhanced Tracking Protection (ETP) is a feature in Firefox browsers that blocks user tracking mechanisms. It allows users to block cookies and storage access from third-party trackers. Mozzila rolled it out as part of Content Blocking, and it offers three-level settings for cookie handling:
This feature lets users decide what level of privacy they want to set up in their browsers. Mozzila is constantly working on that feature and adding new functionalities. The latest version, ETP 2.0, was released in August 2020 and allows users, among other things, to protect themselves from a technique called redirect tracking, also called bounce tracking.
You can read more about ani-tracking mechanisms in different browsers on the Piwik PRO blog: