If you use your internet service provider’s default DNS, they can see everything you do on the web. It comes as no surprise that ISPs don’t like privacy tools like Mozilla’s DNS over HTTPS (DoH) technology in Firefox. The UK Internet Services Providers’ Association (ISPA) declared Mozilla a 2019 Villain, alongside President Trump.
ISPA Internet Villain
Mozilla – for their proposed approach to introduce DNS-over-HTTPS in such a way as to bypass UK filtering obligations and parental controls, undermining internet safety standards in the UK