Does anyone know how to perform a proper webtrtc chechk for leaks? or What's the best way to do a web

yo, had the same scare last week! most sites just check for local IP leaks, but they miss the real stuff.

try ipleak.net – it does a full webtrtc chechk and shows if your VPN is leaking.

if it does, disable webtrtc in firefox (about:config -> media.peerconnection.enabled = false) or use a chrome extension like WebRTC Leak Prevent.