It's definitely something with firefox. Did you try running Firefox in safe mode? That would be step one in tracking it down.
Did you make sure to restart firefox to ensure it was in safe mode?
tarted Firefox in Safe Mode. Now, I'm typing this after restarting Firefox using "Refresh Firefox". I still get the same drop down and then up.
OK, you saw what happened when I res
I dropped down a few lines to describe the rest of the story. It seems that the "jump up a line" thing happens after hitting "Backspace". As I was typing the line above, I typed 'restart', then backspaced to the 'res' and started typing again. That's when the line jumped up.
Being able to reproduce the issue is usually 99% of the battle.
There still might be that Hardware acceleration setting you could try, if you haven't already. I'm not sure safe mode affects that.
This is a test with version 41, not seeing the issue with it either. For what it's worth, I don't have any add-ons or extensions enabled by default or at least have them ask to enable them.
me too much.
I have the same issue with Firefox, but it hasn't bothered