Does it happen in safe mode? >Yes. Does it happen immediately or do you have to use firefox for a while before it happens? >Immediately. Always present as long as I began using Firefox on this computer. Does it happen in a fresh profile? >Yes.
Bug 1610719 Comment 4 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Wrote a response in the wrong bug.