Full Answer
Ad blockers work by preventing scripts from loading. When a user visits your site with an ad blocker active, your tracking scripts never execute. No script, no data, no visibility. What Gets Blocked Almost always blocked:
- Facebook Pixel (connect.facebook.net)
- Google Ads conversion (googleadservices.com)
- Google Analytics (google-analytics.com)
- TikTok Pixel (analytics.tiktok.com)
- Any third-party tracking domain Often blocked:
- Hotjar, FullStory, session recorders
- Chat widgets with tracking
- A/B testing tools
- Retargeting pixels Usually NOT blocked:
- Your own domain's requests
- Core website functionality
- Server-side API calls How Blocking Works Ad blockers use filter lists (EasyList, EasyPrivacy, etc.) that match: Domain-based rules: Path-based rules: Pattern matching: The Complete Blindness When Facebook Pixel is blocked:
- No PageView event
- No ViewContent event
- No AddToCart event
- No Purchase event
- User doesn't exist in Facebook data That user's entire journey—from click to purchase—is...
