Interesting read here Samknows

Mozilla Firefox now allows you to browse so that your DNS requests cannot be intercepted. It is not turned on by default but it is easy to do.

How to enable DNS-over- HTTPS in firefox Enable DoH

How to enable Encrypted SNI SNI Enable

You can visit here to see how your browser performs Cloudfare ESNI Checker

If anyone can see a downside to this please fire away.