ICE gathering not working in certain Chrome profile

[Ruurd Adema]

I have a weird problem where webrtc ice gathering is not working in a certain Chrome profile, and as a result the connection is stuck "new" and "not connected". 

Take for example the trickle ice example from the official samples: (https://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/), this example works in all profiles except my main profile. 

After clicking "Gather candidates" the list of candidates stays empty and webrtc-internals look like this:

ICE connection state: new
Connection state: new => closed
Signaling state: new => have-local-offer
ICE Candidate pair: (not connected)

Time    Event
05/03/2024, 08:47:17    createOffer
05/03/2024, 08:47:17    createOfferOnSuccess (type: "offer", 2 sections)
05/03/2024, 08:47:17    setLocalDescription (type: "offer", 2 sections)
05/03/2024, 08:47:17    setLocalDescriptionOnSuccess
05/03/2024, 08:47:17    signalingstatechange
05/03/2024, 08:47:17    transceiverModified [0], audio
05/03/2024, 08:47:17    icegatheringstatechange
05/03/2024, 08:47:17    icegatheringstatechange
05/03/2024, 08:47:17    close
05/03/2024, 08:47:17    connectionstatechange

Looking at Wireshark I can confirm that Chrome never sends a request to the TURN server.

Has anyone seen this before? 

[Ruurd Adema]

I was able to figure out the cause. I needed to uninstall the purevpn chrome extension. Apparently it blocks the ICE requests, even it's only enabled as an extension but not activated in any other way.

Anyway, case closed.