When Opera built-in VPN was released for the first, I remember a Opera dev said on Opera desktop blog that WebRTC and "plugins"(Flash included) weren't routed through the VPN at that time.
Is it so today?
I'm doing a bit of network sniffing via Microsot network monitor 3.4 (on a Win 10 PC) and it seems flash videos and other "plugins" are tunneled correctly to the VPN, but I'm not an enough experienced user to understand if this is a consequence of MS network monitor's limitations.
I've tested the VPN for plugins leaking at this URL:
https://whoer.net/ (extended version -> Interactive detection -> Run tests) and I get inconclusive N/A results.
However, although my IP is set to one located in Neatherland, the browser is leaking a rather strange IP address for DNS server (18.104.22.168 - owned by Google Inc. and located in Mountain view, California).
So, what is the state of the art of this built-in VPN for plugins? And why the DNS server is located in the USA even if the VPN server is in Europe?
BTW, I've disabled webRTC UDP without proxy in Opera, but on another test Opera is leaking a lot of IPs located in Mountain View, again.