DNS-over-HTTP has also arrived in the Firefox for Android version, five years after the desktop version

Firefox DNS privacy: Faster than ever, now on Android | The Mozilla Blog

Starting with this week’s release of Firefox 143 for Android, users can choose to enable DNS-over-HTTPS (DoH) in Firefox on their mobile devices by selecting “Increased Protection” DoH configuration. Performance testing with Firefox DoH partners is currently underway. After bringing encrypted DNS protection to millions of desktop users, we’re now extending the same to mobile.