privacyguides.org/_includes/sections/browser-webrtc.html

<h1 id="webrtc" class="anchor"><a href="#webrtc"><i class="fas fa-link anchor-icon"></i></a> WebRTC IP Leak Test - Is your IP address leaking?</h1>

<div class="alert alert-danger" role="alert">
  <strong>WebRTC is a new communication protocol that relies on JavaScript that can leak your actual IP address from behind your VPN.</strong>
</div>

<p>While software like NoScript prevents this, it's probably a good idea to block this protocol directly as well, just to be safe. <b>Note:</b> This disables browser-based call functionality that is used for webapps like Discord, Hangouts, Jitsi, etc.</p>

<p>
<a class="btn btn-warning" target="_blank" rel="noopener noreferrer" href="https://ipleak.net">Test your Browser now</a>
</p>

<h3>How to disable WebRTC in Firefox?</h3>

<p>In short: Set "media.peerconnection.enabled" to "false" in "about:config".</p>
<p><strong>Explained:</strong></p>

<ol class="long-string-list">
  <li>Enter "about:config" in the firefox address bar and press enter.</li>
  <li>Press the button "I'll be careful, I promise!"</li>
  <li>Search for "media.peerconnection.enabled"</li>
  <li>Double click the entry, the column "Value" should now be "false"</li>
  <li>Done. Do the WebRTC leak test again.</li>
</ol>

<p>If you want to make sure every single WebRTC-related setting is really disabled change these settings:</p>

<ol class="long-string-list">
  <li>media.peerconnection.turn.disable = true</li>
  <li>media.peerconnection.use_document_iceservers = false</li>
  <li>media.peerconnection.video.enabled = false</li>
  <li>media.peerconnection.identity.timeout = 1</li>
</ol>

<p>Now you can be 100% sure WebRTC is disabled.</p>

<p>
<a class="btn btn-primary" target="_blank" rel="noopener noreferrer" href="https://ipleak.net">Test your Browser again</a>
</p>

<h3>How to disable WebRTC in Safari?</h3>

<p>Safari is far stricter with WebRTC than other major browsers, and it does not leak your IP address in its default configuration. If you'd like, you can follow these steps just to double-check your browser:</p>

<ol class="long-string-list">
  <li>Choose "Preferences" under the Safari menu in your menu bar.</li>
  <li>Select the Advanced tab and check the "Show Develop menu in menu bar" box.</li>
  <li>Exit Preferences and open the Develop menu in your menu bar.</li>
  <li>In the drop-down menu, open the "WebRTC" submenu and ensure "Enable Legacy WebRTC API" is unchecked. If it's grayed out, even better.</li>
</ol>

<h3>How to disable WebRTC in Google Chrome?</h3>

<p>WebRTC cannot be fully disabled in Chrome; however, it is possible to change its routing settings (and prevent leaks) using an extension. Two open-source solutions include <a href="https://chrome.google.com/webstore/detail/webrtc-leak-prevent/eiadekoaikejlgdbkbdfeijglgfdalml">WebRTC Leak Prevent</a> (options may need to be changed depending on the scenario), and <a href="https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm">uBlock Origin</a> (select "Prevent WebRTC from leaking local IP addresses" in Settings).</p>

<h3>What about other browsers?</h3>

<p>Chrome on macOS and Internet Explorer do not implement WebRTC yet. <a href="#browser"><i class="fas fa-link"></i> But we recommend using Firefox on all devices.</a></p>