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In Chrome/Chromium there is a WebRTC Network Limiter [1] extension that let you set "Use only my default public IP address" policy and render the method I presented ineffective.

[1] https://chrome.google.com/webstore/detail/webrtc-network-lim...

Google abandoned that extension in 2016, which is why the last option (for disable_non_proxied_udp) is greyed out.

> This can be disabled in Brave by turning "WebRTC IP handling policy" to "Disable non-Proxied UDP"

Not advised if you want to use WebTorrent, since it relies on WebRTC.

Setting it to "Default public interface only" still allows WebTorrent & WebRTC-reliant tools to be used, whilst still only broadcasting your public IP (which is already known anyway).

perfect