Firefox users in the U.S. are getting an extra measure of privacy protection starting this week. Firefox Desktop Product Development VP Selena Deckelmann heralded the rollout of encrypted DNS over HTTPS, or DoH, by default in Mozilla’s browser. The DNS, or Domain Name System, is one of the oldest parts of the Internet. It’s how “human-friendly” names are converted to the IP addresses needed to reach a website. Because of the way the Internet was designed decades ago, browsers doing lookups for websites have done so without encryption.