You find the following three privacy settings listed under the main settings tab in the uBlock Origin options (which you access with a right-click on the icon and the selection of options). Go to uBlock0 Dashboard.
Disable pre-fetching (to prevent any connection for blocked network requests).
Disable hyperlink auditing/beacon.
Prevent WebRTC from leaking local IP address (standard setting is
not set by deafult)
The new setting provides you with a toggle to enable or disable WebRTC from leaking your local IP address.
Test here:
https://diafygi.github.io/webrtc-ips/ STUN Servers won't log you anymore.
polonus (volunteer website security analyst and website error-hunter)