Firefox 102.10.0esr seems to do this here.

I type into the address bar: `http://example.com` and it corrects it to the HTTPS version. Even when I try to change the URL back to the `http://` it goes to the HTTPS version. When I try the same with curl as in `curl -v http://example.com` I can see the HTTP traffic coming through correctly i.e. the site still supports HTTP.

Note that I have configured "Don't enable HTTPS-Only Mode" in the Firefox settings. I use some addons although none to specifically redirect my requests to HTTPS...