Very disappointingly, along with my WAN IP my local one is also detected and displayed in your reply when the query is send through Firefox browser, which is not the case when Edge is used. I have my own router behind the WAN optical terminal, no remote access, no port forwarding are activated. Is it Firefox giving away details of my private (believed to be private) LAN? How can I prevent it from doing so? Is it safe browser, or it is a traitor. Thanks.
Thank you for your answer. Actually I'm not concerned - at least more than it is worthwhile - about the fact that I am identifiable by my WAN IP. What I am concerned about is that someone could get into my private LAN. I suppose giving away one specific private IP along with the WAN could be regarded as some kind of assistance to starting to hack it. A sort of semi invitation for those who like to be semi invited. That is why I was first disappointed when my private IP was also displayed. But beyond that it was very useful for me, because I have learned from it, too. After some research webRTC has been switched of both in my Firefox and Chrome. Now my private IP allegedly is not leaking. At least it is not listed. And now I wonder if I am now really safer with webRTC disabled or I have been just made feel safer? Isn't it the happiness of the semi knowledgeable under-informed user?