Okay, so THAT's interesting
When I disable the weird and bad new 'DNS over HTTPS' malfeature in Firefox 60, ALL PAGES STOP LOADING AT ALL.
Set it back from '5' to '0', and it works.
Ugh. So is this Cloudflare crap no longer optional???
Mozilla, this is terrible. Either use the actual Internet protocols, or get off the Internet.
Mozilla 52 still works fine.