It does block the possibility to know your IP when you connect to a site using WebRTC.
You can check for example at https://browserleaks.com/webrtc

💋

This is probably one of the best extensions to get, you can turn it off from the toolbar,super effective and easily a 5/5... A big thanks to the Dev for this.

very well

wow!
I had problem with BigBlueButton. Fixed completely!

Nice

This addon is GREAT! It's the first one, out of several I've tested that, according to browserleaks.com/webrtc, actually works! Local, Public and IPv6 IP Addresses are all listed as, (n/a)! Give this addon a go! (Recommended by someone who cares about online privacy!)

Works like a charm according to https://browserleaks.com/webrtc

Ok