I've been randomly getting the situation where the video on Firefox doesn't work, but the sound does. It says something like "Sorry something's gone wrong", but

I've been randomly getting the situation where the video on Firefox doesn't work, but the sound does. It says something like "Sorry something's gone wrong", but for a brief second I can see the video. I think it's connected to the ad-blocker changes, but it doesn't actually have a message about having an ad-blocker on.