Hmmm, now and then I stumble over links that just won't work on Firefox, even with uBlock and uMatrix disabled. Here's one, I click "Start quick game", and all I get is black. Is this normal or an exception?
Really not anything beyond the mentioned plugins. On my old system, I could open the offending pages in Chromium and they'd usually work there. On my new one I have no second browser yet, because my distro is Ubuntu-based and I've purged the snap bs.