How does DNS over TLS is supposed to work? (Using Cloudflare's 1.1.1.1)

I just configured Cloudflare's DNS servers [1.1.1.1 and 1.0.0.1], yet when I type some random URL in the browser I'm still catching unencrypted DNS queries.

At their page, they talk about how important DNS over TLS is, and how simple it is to setup their DNS resolvers, but nothing about how to configure it to use DNS over TLS.

I'm wondering what fundamental part of the equation I'm missing.

ninja edit: tested on all browsers