Disabling WebRTC on Microsoft Edge does not work

[adsfwrh]

OS: Ubuntu 22.04.4 LTS x86_64
Kernel: 6.5.0-21-generic
DE: GNOME 42.9
Microsoft Edge is installed with Flatpak, Version 126.0.2592.87 (Official build) (64-bit)
Tried your method:

Open Edge and type: about:flags in the Address Bar & press Enter
You’ll see WebRTC here. Under that, there’s an Option to hide your real IP Address. Check the Box: Hide my local IP address over WebRTC connections to activate.

But now if I open the https://proxy6.net/en/privacy in both general and "InPrivate" window, it still shows the WebRTC is open. The settings work well on Firefox, the WebRTC is completely down. I really have no idea what is going on with Edge.

[BaseBlank]

I’ve tried various methods but still can’t disable WebRTC in Edge, so I’ve switched to Chrome and Firefox.
Chrome provides better and more comprehensive privacy protection than Edge.
Firefox allows users to make more direct, high-level setting changes.