What version of FF you guys are using because I checked using both mobile and desktop (ver 86) and everything loads fine.
Update your browser and extensions if you haven't done so already, disable any adblock or scriptblock running for MD as well. A good way to check if any addons, extensions, or settings are interfering with MD is to browse the site using Safe Mode. Also check MD using other browsers to make sure it's just the browser and not your device that is bugging out. Eg if you use the default browser, FF, and Chrome and none can load MD, you should know it's your device that's having problems.