Is it a part of resistFingerPrinting? If so, users may not know that this is the issue. Also if WebRTC is the issue, then that's what the browser should report, not endorsing a Google product.
Because without a VPN, I am naturally "leaking" my IP, as this is how the internet works?
There is something called setting priorities. And most do so by marketshare and not idealistic reasons.
(while I actually had great pain, to still support FF out of said idealistic reasons btw.)