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Comment by anfilt | Hacker News Reader

More like this:

    media.peerconnection.turn.disable = true
    media.peerconnection.use_document_iceservers = false
    media.peerconnection.video.enabled = false
    media.peerconnection.video.vp9_enabled = false
    media.peerconnection.video.h264_enabled = false
    media.peerconnection.identity.enabled = false
    media.peerconnection.identity.timeout = 1

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I need to find a way to automate the patching of Firefox's about:config when installing a new OS etc, quite a few telemetry/storage/WebRTC tweaks to date now.

There is an extension [1] that'll at least disable the IP address gathering (it doesn't look to disable all of the above settings but may have a similar effect if browser.privacy.network.peerConnectionEnabled disables everything):

[1] https://github.com/ChrisAntaki/disable-webrtc-firefox

The simplest level would to add what settings you want to Prefs.js file. http://kb.mozillazine.org/Prefs.js_file

If you want the preferences locked the application level and not be overridden or be unchangeable at profile level. Mainly important if you are managing a lot systems. http://kb.mozillazine.org/Locking_preferences

Look into vendor.js for patching about:config. I know Arch has one for sure in their package.

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