I mistakenly thought that YouTube hit a compatibility problem with my Firefox browser. The only breakage I could see was that the right sidebar of related/recom

I mistakenly thought that YouTube hit a compatibility problem with my Firefox browser. The only breakage I could see was that the right sidebar of related/recommended videos disappeared. But I was watching several videos consecutively just fine. (I obtained video links from recent bookmarks, plus manually queued URLs of next videos to watch.)