Firefox 73, what’s new? In Firefox 73, Mozilla has introduced a DNS over HTTPS (DoH) provider. DoH (DNS over HTTPS) encrypts DNS requests in the Firefox browser.
The DNS requests executed via DoH in Firefox can no longer be viewed or modified by DNS providers.
Mozilla indicates that DoH is an important measure to protect the privacy of its users. In some countries, DNS requests are manipulated to force advertisements on users and analyze their browsing behavior. Mozilla hopes DoH will prevent such practices.
In 2019, Mozilla announced that it had found a second DNS provider in NextDNS that participates in Firefox’s Trusted Recursive Resolver program.
Cloudflare is the default DNS over HTTPS provider in Firefox. Alternatively, users can also choose NextDNS. Mozilla hopes that more DNS providers will join the DoH project in the future.
How to enable DNS over HTTPS?
Open Firefox, in the address bar type: about:preferences#general
Scroll down to “Network Settings“, click Settings.
Check “Enable DNS over HTTPS” and save settings.