Cherry Seed

How do ad blocker filter lists work?

ad blocker filter lists EasyList how ad blockers work tracking block rules uBlock Origin filters

Quick Answer

Ad blocker filter lists are community-maintained text files containing rules that match URL patterns, DOM elements, and network requests associated with ads and trackers. The most popular list, EasyList, contains thousands of rules updated regularly. When you visit a page, your ad blocker checks every network request and DOM element against these rules and blocks anything that matches. Lists like EasyPrivacy specifically target analytics and tracking scripts.

Full Answer

Ad blocker filter lists: Major filter lists:

  • EasyList: Ad blocking, most popular
  • EasyPrivacy: Tracker blocking
  • Fanboy's Lists: Additional coverage
  • uBlock filters: uBlock Origin specific
  • Regional lists: Country-specific ads Rule syntax examples: How matching works: Update frequency:
  • EasyList: Multiple times per week
  • New trackers added within days
  • Community-maintained
  • Pull requests on GitHub How trackers get added: 1. User notices tracker 2. Submits to filter list maintainers 3. Maintainer verifies it's a tracker 4. Rule added to list 5. Propagates to all users...

Sources

Programmatic Access

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Cherry Tree by Seresa - https://seresa.io/seed/data-loss-adblockers/adblocker-impact-ad-blocker-filter-lists