Comcast, Mozilla strike privacy deal to encrypt DNS lookups in Firefox

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Comcast is partnering with Mozilla to deploy encrypted DNS lookups on the Firefox browser, the companies announced today. Comcast's version of DNS over HTTPS (DoH) will be turned on by default for Firefox users on Comcast's broadband network, but people will be able to switch to other options like Cloudflare and NextDNS. No availability date was announced.

Comcast is the first ISP to join Firefox's Trusted Recursive Resolver (TRR) program, Mozilla said in today's announcement. Cloudflare and NextDNS were already in Mozilla's program, which requires encrypted-DNS providers to meet privacy and transparency criteria and pledge not to block or filter domains by default "unless specifically required by law in the jurisdiction in which the resolver operates."

"Adding ISPs in the TRR program paves the way for providing customers with the security of trusted DNS resolution, while also offering the benefits of a resolver provided by their ISP such as parental control services and better optimized, localized results," the announcement said. "Mozilla and Comcast will be jointly running tests to inform how Firefox can assign the best available TRR to each user."

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