What does media.peerconnection.enabled do?

It controls whether Firefox's WebRTC peer-connection feature is active. Setting it to false disables WebRTC entirely, which stops the IP leak — but also disables in-browser video calls and screen sharing that rely on WebRTC.

Will disabling WebRTC break websites?

It breaks features that need WebRTC, mainly browser-based calls (Google Meet, Discord, Zoom in the browser) and some live streaming or file-sharing tools. Regular browsing is unaffected. Re-enable it when you need a call.

Is there an easier way than about:config?

Yes. The 'Disable WebRTC' add-on gives you a toolbar toggle so you can switch it on and off without editing about:config each time. The underlying effect is the same.

How to Disable WebRTC in Firefox via about:config

Firefox is the one major browser that still lets you switch WebRTC off completely. Where Chrome forces you to rely on extensions, Firefox exposes a single preference you can flip in under a minute. Here's exactly how.

Disable WebRTC in about:config (Step by Step)

Type about:config in the Firefox address bar and press Enter.
Click Accept the Risk and Continue on the warning page.
In the search box, paste media.peerconnection.enabled.
Click the toggle button on the right to set its value to false.
That's it — WebRTC is now disabled. No restart needed.

Tip: To turn WebRTC back on for a video call, return to about:config and toggle media.peerconnection.enabled back to true.

What This Breaks

Disabling WebRTC is the most thorough way to stop the leak, but it has a cost: any feature that depends on WebRTC will stop working in Firefox. That mainly means:

In-browser video calls (Google Meet, Discord, Zoom in the browser)
Screen sharing and live streaming tools
Some peer-to-peer, browser-based file-transfer sites

If you use those regularly, re-enable WebRTC when needed, or use a leak-protecting VPN instead.

The Easy-Toggle Alternative

If editing about:config each time is a hassle, install the Disable WebRTCadd-on. It adds a toolbar button to turn WebRTC on or off with a click — handy if you switch between privacy browsing and video calls often.

Verify the Leak Is Gone

Connect your VPN if you use one, then run our WebRTC leak test. With WebRTC disabled, the test should detect no IP addresses at all. For the background on why this matters, read what WebRTC is and how it exposes your IP, and if you also use Chrome, see how to disable WebRTC in Chrome.