During July 2018, a planned Firefox Nightly experiment was performed involving secure DNS via the DNS over HTTPS (DoH) protocol. About 25,000 Firefox Nightly 63 users had agreed to be part of Nightly experiments and participated in this study. Cloudflare operated the DoH servers that were used according to the privacy policy they had agreed to with Mozilla. Each user was additionally given information directly in the browser about the project. That information included the service provider, and an opportunity to decline participation in the study.
Browser users are currently experiencing spying and spoofing of their DNS information due to reliance on the unsecured traditional DNS protocol. Using a trusted DoH cloud based service in place of traditional DNS is a significant change in how networking operates and it raises many things to consider as we go forward when selecting servers. However, the initial experiment focused on validating two separate important technical questions:
The experiment is now complete and here are the finding highlights:
Source: Firefox Nightly
“We’re committed long term to building a larger ecosystem of trusted DoH providers that live up to a high standard of data handling. We’re also working on privacy preserving ways of dividing the DNS transactions between a set of providers, and/or partnering with servers geographically. Future experiments will likely reflect this work as we continue to move towards a future with secured DNS deployed for all of our users.” says the Firefox Nightly team.
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