With HTTPS, you can read the request only in the context of the browser. You can't MITM (via Wireshark and similar tools, or over the network), unless you have

With HTTPS, you can read the request only in the context of the browser. You can't MITM (via Wireshark and similar tools, or over the network), unless you have a root certificate and override the website's certificate with it (assuming the browser allows root certificates, and Firefox can be configured to not allow custom root certificates). So no, not the same thing at all. And if you meant that in the context of HTTP-only, well, arguably password managers should warn before autocompleting unsecure forms, and browsers should warn before sending the request.