@thomkennon @Angle @stevegrunwell hmm maybe flipping off the "tracking protection" switch (it's per-site; if the shield icon next to the HTTPS lock isn't (IIRC) purple then it's not involved) could help?
there's HTTPS-only mode but if that was your problem it would throw up a big "page is not HTTPS!!!!", not just hang. Same if it was an older version of HTTPS. Things on the page not loading sounds like a content blocker issue.
Also, of course, if you have any extensions those could be doing it (we have uBlock Origin set to block third-party frames which gets rid of 90% of crap but sometimes breaks things), but you'd know if you have any.