Sparkware
Every system, every piece of hardware - both in the data centers and in the hospitals - had to be certified Y2K compliant in enough time to correct the issue. As I recall, we were trying to target being Y2K ready on January 1, 1999 but that date slipped.
A "Mission Control" was created at the Data Center and it was going to be activated on December 15, 1999, running 24 hours a day until all issues were resolved. Every IT staff member was going to rotate through Mission Control and every staffer was going to have to serve some third shifts too.
I left Columbia/HCA in June, 1999 after they wanted to move me into COBOL. I had no desire to do so and I took a programming position with the Tennessee Department of Transportation.
I remember my first day on the job when I asked my boss what our Y2K policy was. He shrugged and said "If it breaks, we'll fix it when we get back from New Year's".
What a difference!!!
I did try your Apollo17.org site and it works beautifully in the same Firefox browser. And if I run Google Chrome, your Apollo 11 site works perfectly. Just not in Firefox.
I am running similar extensions in both browsers and I did disable Ublock Origin in Firefox but that had no effect. Apollo17.org in Firefox works fine with Ublock Origin enabled and I also run Ublock Origin in Chrome.
I'm willing to help out with debugging if you like.