Fingerprinting

Browser Fingerprinting Skill

Understand how websites identify browsers through fingerprinting, and how to manage fingerprint isolation for multi-account scenarios.

What is browser fingerprinting?

Websites collect dozens of browser attributes to create a unique "fingerprint" that identifies your browser across sessions — even without cookies. Key attributes include:

Check your fingerprint

# Open BrowserScan to see your fingerprint profile
# Works with Selenium or Playwright

driver.get("https://www.browserscan.net/")
# or
page.goto("https://www.browserscan.net/")

Other fingerprint checking sites:

• https://www.browserscan.net/
• https://browserleaks.com/
• https://amiunique.org/
• https://coveryourtracks.eff.org/

Canvas fingerprinting

Canvas fingerprinting draws invisible shapes on an HTML5 canvas and hashes the pixel data. Different GPUs and rendering engines produce different results.

// How sites detect canvas fingerprint (conceptual)
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
ctx.textBaseline = 'top';
ctx.font = '14px Arial';
ctx.fillText('fingerprint test', 2, 2);
const hash = canvas.toDataURL().hashCode();

To spoof: Antidetect browsers like AdsPower inject noise into canvas rendering so each profile produces a different hash.

WebGL fingerprinting

WebGL exposes GPU vendor, renderer, and shader precision — very hard to spoof manually.

const gl = document.createElement('canvas').getContext('webgl');
const debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
const vendor = gl.getParameter(debugInfo.UNMASKED_VENDOR_WEBGL);
const renderer = gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL);

WebRTC IP leak

WebRTC can reveal your real IP address even when using a proxy or VPN.

// WebRTC leak test
const pc = new RTCPeerConnection({ iceServers: [] });
pc.createDataChannel('');
pc.createOffer().then(offer => pc.setLocalDescription(offer));
pc.onicecandidate = event => {
    if (event.candidate) {
        console.log('IP:', event.candidate.candidate);
    }
};

To prevent: Disable WebRTC or use an antidetect browser that masks the real IP in WebRTC.

Fingerprint isolation for multi-account

When managing multiple accounts, each account needs a unique, consistent fingerprint. Using the same fingerprint across accounts is a common reason for account linking and bans.

Required isolation per account:

• Unique canvas noise seed
• Unique WebGL parameters
• Unique User-Agent
• Separate proxy IP
• Isolated cookies and localStorage
• Different timezone matching the proxy location
• Different language settings
• Disabled or masked WebRTC

Tools for fingerprint management:

• AdsPower — antidetect browser with per-profile fingerprint management and Local API for automation
• Browser profiles in Playwright/Selenium only isolate cookies, NOT fingerprints

Fingerprint consistency

A fingerprint must be internally consistent. Common mistakes:

Important notes

• Cookie clearing does NOT reset your fingerprint
• Incognito mode does NOT change your fingerprint
• VPN changes your IP but NOT your fingerprint
• Each browser profile needs a unique fingerprint AND a unique proxy for proper isolation
• Antidetect browsers automate fingerprint randomization; doing it manually in Selenium/Playwright is fragile and incomplete