I use a home video appliance called camect which is accessed through a web interface which explicitly only works in chromium browsers. Oddly, I often find that the bbc news page doesn't load images on the first attempt in Firefox, but always does in Chrome.

One of them happens to be the educational site https://www.deltamath.com/

OK so what is broken? The homepage comes up fine and a few clicks seem fine. Do I have to sign up to see issues?