Mozilla has released Firefox 73 today, February 11th, 2020, to the Stable desktop channel for Windows, Mac, and Linux with bug fixes, new features, and security fixes. With the release of Firefox 73, Mozilla has introduced a default zoom setting that will be used for all sites that you visit. Mozilla has added NextDNS as an additional provider that can be used with their DNS over HTTPS feature. When using DoH, all DNS requests will be encrypted so that they cannot be monitored and tracked by governments and Internet providers.
Source: https://www.bleepingcomputer.com/news/software/firefox-73-released-with-security-fixes-new-doh-provider-more/