I just went through comments from all the times this has been reposted in the past 10 years, and this is (so far) the first time there aren't any complaints about not working in their browser! I'm counting just the submissions that got >10 comments. The previous time, from 2017[1], was already quite good - there was only a single complaint, and that was about someone missing a WebGL extension this needs for floating…
400 Bad Request, You have attempted to access this site via TLS (HTTPS), but it is not configured for TLS access.
Probably because I have "dom.security.https_only_mode" enabled in Firefox