Released yesterday, Firefox 74.0 can block Facebook from tracking its users and no longer allows third-party apps to install add-ons, but it also features DNS-over-HTTPS provided by Cloudflare (with NextDNS as an option). This update is available for Windows, macOS, and Linux/Unix users.
https://www.notebookcheck.net/Firefox-74-rolls-out-Facebook-Container-DNS-over-HTTPS-and-more.457326.0.html
Hadn't noticed the DNS-over-HTTPS.
Thanks for pointing it out!
Working great on my end :)