Unfortunately, not as much as you might hope.
For good reasons, the Tor browser doesn't store your browsing history - so there's no 'recently visited sites', no address bar autocomplete, no cached redirects, no cached HSTS, and no colour-changed 'visited' links.
So if you're visiting a site that isn't HSTS-preloaded - for example bitcoinknots.org - you'd better remember to type in the https:// explicitly, as that's your sole protection against getting MITMed.
>Tor Browser already comes with HTTPS Everywhere, NoScript, and other patches to protect your privacy and security.
And more broadly, neither HSTS preloading or HTTPS Everywhere include a list of every single site on the internet.
I use this on my main PC. Once or twice a day I might visit some old or especially cantankerous site that doesn't do HTTPS, I get a full page interstitial explaining the problem, I can decide if I'm OK with that. Otherwise every single link, typed URL, etc. is HTTPS regardless of whether that was what was originally written.
I wouldn't recommend it in its current state for my mother, but it's definitely what someone using Tor would want, and it's only getting more ubiquitous.
You should use a slug[1] if you need assurance that you’re staying on your vpn/protocol/exit.
It would be very simple to create a "tor only" network slug.
[0]: https://gitlab.torproject.org/tpo/applications/tor-browser/-...
[0]: https://support.mozilla.org/en-US/kb/https-only-prefs