How to Configure Advanced Tracking and Fingerprinting Protection in Safari

Modern digital advertising networks have moved beyond standard HTTP third-party cookies to track users across the web. Instead, advanced trackers employ browser fingerprinting—harvesting subtle hardware characteristics such as installed system fonts, screen resolutions, audio API latency, GPU canvas rendering quirks, and URL click-tracking query parameters (e.g., fbclid, gclid). In macOS Sonoma/Sequoia and iOS 17/18, Apple added Advanced Tracking and Fingerprinting Protection within WebKit, stripping tracking tokens from URLs and providing generalized device metrics to advertising scripts.

Understanding How Fingerprint Mitigation Works

Safari’s anti-fingerprinting engine neutralizes tracking vectors transparently:

• URL Link Tracking Stripping: Automatically identifies and removes known click-tracking parameters appended to link URLs in Safari, Messages, and Mail without breaking the destination web page.
• Standardized Hardware Telemetry: Generates uniform, generalized responses to JavaScript queries probing system fonts, WebGL shaders, Canvas graphics rendering, and Web Audio APIs, preventing trackers from calculating a unique device signature.
• Operational Scope: By default, Apple enables this protection exclusively in Private Browsing. However, users can enforce protection globally across all normal browsing windows.

Enabling Anti-Fingerprinting Across All Browsing on macOS

To enforce advanced tracking protection across every tab in Safari on your Mac:

1. Open Safari on macOS.
2. In the menu bar, click Safari > Settings (or press Cmd + ,).
3. Select the Advanced tab.
4. Locate the setting: Use advanced tracking and fingerprinting protection.
5. Click the dropdown menu and change it from in Private Browsing to in all browsing.
6. Close the Settings window. All open tabs immediately adopt standardized API responses and link-cleaning behaviors.

Enabling Anti-Fingerprinting Across All Browsing on iOS and iPadOS

To apply the same protection across iPhone and iPad:

1. Open the Settings app on iOS.
2. Scroll down and tap Apps > Safari (or Safari directly).
3. Scroll to the very bottom and tap Advanced.
4. Tap Advanced Tracking and Fingerprinting Protection.
5. Select All Browsing.

Verifying Link Cleaning and Privacy Reports

To confirm that tracking protection is actively defending your browsing sessions:

• Copy any promotional URL containing long tracking tags (e.g., ?utm_source=...&gclid=...) and paste it into the Safari address bar. Safari automatically scrubs foreign identifiers before transmitting the request.
• Click the shield icon (or Safari > Privacy Report) to review a real-time list of blocked cross-site tracking engines across your visited domains.