Browser Privacy Audit: What Your Browser Reveals to Websites
Browser Fingerprinting
Browser fingerprinting collects attributes like screen resolution, installed fonts, browser plugins, timezone, language, hardware specs, and WebGL renderer. Combined, these create a fingerprint unique to your device — often more identifying than cookies because it persists across cookie deletion.
Data Exposed by Default
IP address (always visible). User-Agent string (browser, version, OS). Referer header (where you came from). Accept-Language (preferred language). Screen resolution and color depth via JavaScript. Timezone. Whether cookies are enabled. Navigator.plugins list. WebGL renderer string.
Reducing Your Footprint
Use Firefox with Enhanced Tracking Protection. Enable browser fingerprint resistance (Firefox: privacy.resistFingerprinting). Use a VPN for IP masking. Disable or limit JavaScript for sites that don't need it. Use private/incognito mode (reduces but doesn't eliminate tracking). Consider Brave browser.
Frequently Asked Questions
Audit your browser privacy
Use the Privacy Checkup tool to see what your browser exposes to websites.
Open Privacy Checkup