Today I noticed something similar on FB using Chrome. I posted a reply to something and FB scrolled back about 6 posts on its own. It's not quite the same experience I've had with Firefox continually scrolling ahead, but it could be the same trigger....
Yes, it started on mine again yesterday. It's not often (so far) and hitting HOME in FB clears it up, but if you're in the middle of scrolling though something, it's pretty inconvenient.Contrary to what someone else has stated, I have NOT had this is...
So far I have not had the problem. I'll give it some more time, because it would go for sometimes a few days before showing up. I'm crossing my fingers.