- In the Location bar, type about:config and press Enter.
- The about:config “This might void your warranty!” warning page may appear. Click I’ll be careful, I promise! to continue to the about:config page.
- Search for privacy.trackingprotection.enabled.
- Double-click privacy.trackingprotection.enabled to toggle its value to true.
This will turn on Tracking Protection. If you later want to turn it back off, repeat the above steps to toggle the preference back to false.