While software like NoScript prevents this, it’s probably a good idea to block this protocol directly as well, just to be safe.
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How to disable WebRTC in Firefox?
In short: Set “media.peerconnection.enabled” to “false” in “about:config”.
- Enter “about:config” in the firefox address bar and press enter.
- Press the button “I’ll be careful, I promise!”
- Search for “media.peerconnection.enabled”
- Double click the entry, the column “Value” should now be “false”
- Done. Do the WebRTC leak test again.
If you want to make sure every single WebRTC related setting is really disabled change these settings:
- media.peerconnection.turn.disable = true
- media.peerconnection.use_document_iceservers = false
- media.peerconnection.video.enabled = false
- media.peerconnection.identity.timeout = 1
Now you can be 100% sure WebRTC is disabled.
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How to fix the WebRTC Leak in Google Chrome?
There is no known working solution, only a plugin that is easily circumvented.