Disappointed that Firefox is giving Cloudflare user DNS resolution data by default via DoH. I trust my ISP but if I didn't, I'd use a trusted VPN to protect *all* my traffic. DoH is just a DNS-only VPN. What's worse, if you do use a VPN for #privacy FF will still leak your DNS data to Cloudflare by default. https://blog.mozilla.org/futurereleases/2019/09/06/whats-next-in-making-dns-over-https-the-default/
@kyle I understand your general concern, but in this case, Cloudflare seems aligned with Mozilla's stance against surveillance capitalism.
Cloudflare explicitly states the data collected in the link and which are deleted after 24 hours and the 3 pieces that are retained: https://developers.cloudflare.com/22.214.171.124/commitment-to-privacy/privacy-policy/privacy-policy/
Cloudflare also explicitly states in the other link that the data is not sold or used to target ads: https://developers.cloudflare.com/126.96.36.199/commitment-to-privacy/
@kyle Most people are not going to run their own DNS servers, but Mozilla isn't stopping them from using them if they do, so the immediate benefit is an increase in default privacy. “Better is good.”
@kyle I agree the data is sensitive. There has to be a buyer to make it valuable. Outside of ad targeting, I am not sure who would be interested in buying Cloudflare's DNS access data if the information necessary to target an individual is removed.
@jeremiahlee Cloudflare says they don't sell it for ads, but to answer your question in general, the value is the association of a series of websites with an individual, even if you don't know *who* the individual is.
Advertisers find a lot of value in "someone who likes X also likes Y but doesn't like Z" so that when they do have a target in mind that likes X, they know to market Y to them but not Z. This is why social graphs are valuable--friends/colleagues often share preferences.