Our existing certificate will elapse on 22 July, 12:00 UTC. I have installed a new one, valid to June 2025, and hopefully the switchover will take place without any hiccups.
However, if there is any problem, you should still be able to access the NG site. We don't do nefarious stuff here and there is just a single session cookie in existence, to show your log-in status. No tracking or anything third-party hidden dangers. Thus, even without the https: any browser should be able to reach us, if the certificate business doesn't pan out as planned.