WebRTC makes it easier for people to communicate between browsers, without having to install additional software. With WebRTC, you can talk, video conference, or share files with other people.
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WebRTC can expose a device’s local and public internet addresses, even if you hide your device’s location with a virtual private network (VPN). This is called a WebRTC leak because it leaks private information. Once an advertiser or website host knows a device’s public internet address, they can identify the region, city, and internet service provider associated with that address.
If you don’t need WebRTC, disable or restrict it in your browser. You can prevent a WebRTC leak in many, but not all, modern browsers.
Open the browser you are using and go to https://browserleaks.com/webrtc. This page tests the browser for WebRTC leaks and shows three categories of information.