How to Fix a WebRTC Leak in Chrome, Firefox & Brave (2026)

A WebRTC leak exposes your real IP address to every website you visit — even when you're using a VPN. Most people have no idea this is happening. This guide shows you exactly how to test for a WebRTC leak and fix it permanently in any browser, in under two minutes.

What Is a WebRTC Leak?

WebRTC (Web Real-Time Communication) is a browser technology that enables peer-to-peer features like video calls, voice chat, and file sharing directly in the browser — without plugins. It's used by Google Meet, Discord, Zoom web, and hundreds of other services.

The problem: WebRTC uses a protocol called STUN (Session Traversal Utilities for NAT) to discover your network path. As part of this process, it reveals your local network IP and real public IP to the page — using direct UDP connections that bypass your VPN tunnel. A WebRTC leak is one of many signals that contribute to your browser fingerprint.

How to Test If You Have a WebRTC Leak

1. 1
   Go to UNDETECT.CLUB Open undetect.club in the browser you want to test. The scan starts automatically.
2. 2
   Find the WebRTC Leak card Scroll to the card labeled "WebRTC Leak" or click the NETWORK tab.
3. 3
   Read the Local IP (srflx) row If it shows an IP like 192.168.1.x, 10.x.x.x, or 172.16.x.x — your local network IP is leaking. If it shows your real public IP — you have a severe leak.

How to Fix the WebRTC Leak — By Browser

Google Chrome & Chromium-based browsers

Chrome doesn't have a native setting to disable WebRTC, but you have two good options:

Option A — uBlock Origin (recommended, free)

1. 1
   Install uBlock Origin from the Chrome Web Store if you don't have it.
2. 2
   Open uBlock Origin dashboard → click the extension icon → Settings gear.
3. 3
   Go to the Settings tab and check Prevent WebRTC from leaking local IP addresses.
4. 4
   Reload the tab and re-test at UNDETECT.CLUB.

Option B — WebRTC Control Extension

Install WebRTC Control from the Chrome Web Store. Click its icon to toggle WebRTC off. Simple one-click solution, though it will break video calls in that tab.

Mozilla Firefox

Firefox lets you disable WebRTC entirely from the config panel — no extension needed:

1. 1
   Open about:config in the address bar. Click "Accept the Risk and Continue".
2. 2
   Search for media.peerconnection.enabled
3. 3
   Double-click to toggle the value to false.
4. 4
   Restart Firefox and re-test. No extension needed.

Brave Browser

Brave has built-in WebRTC privacy controls — no extension needed:

1. 1
   Open Settings → brave://settings/privacy
2. 2
   Find "WebRTC IP Handling Policy" under the Privacy section.
3. 3
   Select "Disable Non-Proxied UDP" — this prevents IP leaks while keeping WebRTC functional through your VPN.

Microsoft Edge

Edge is Chromium-based — the same uBlock Origin approach works. Additionally, check edge://settings/privacy for the WebRTC section (available in some versions).

Fix via Your VPN Browser Extension

Major VPN providers include WebRTC leak protection in their browser extensions. Check your VPN's extension settings for a "WebRTC" or "IP leak protection" toggle. NordVPN, ExpressVPN, Mullvad, and ProtonVPN all support this.

Comparison: Which Fix Is Best?

Verify Your Fix Works

1. 1
   Go back to UNDETECT.CLUB and reload the page.
2. 2
   Wait for the WebRTC Leak card to finish scanning.
3. 3
   Check the result — it should now show "No leak detected" or "Not exposed" in green.

Frequently Asked Questions

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