[Mozilla Enterprise] Inquiry: how to disable network traffic via cloudfare-dns and trr.dns.nextdns.io?

[Hoang (US), Victor T]

Hello all,

It's been several months since I've deployed 68 ESR to my company. I've been notified by some folks over in the network/security team who are noticing that Firefox is increasing the network traffic onto cloudfare-dns and trr.dns.nextdns.io. Seems like it's a firefox feature that's on by default based on what I can find on google related to this article: https://support.mozilla.org/en-US/kb/firefox-dns-over-https (sorry i probably sound like I live under a rock).

These folks are asking if there are alternatives to this solution because it is causing huge network traffic spikes in our proxy. I checked and I don't have DNS over HTTPS enabled in the network settings, so I'm not sure how they're seeing this. Anyone know if its possible to disable it via policies.json and what this might mean without it?

Thanks,
Victor Hoang
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