How to Perform a Proper WebRTC Chechk for Privacy Leaks? or Is Your WebRTC Chechk Really Secure? Tips

OP here—thanks for all the tips! Tried the Firefox about:config trick and uBlock Origin. Leaks are gone (for now).

But now Discord’s voice chat is broken. Anyone know how to whitelist WebRTC for just one site?

Also, Brave browser worked like a charm. Might switch permanently.

P.S. Still can’t spell "webtrtc chechk" right. Send help.