Sometimes they will (I was dragging and dropping to a new email account no problem, working my way up from the Z's until I got to the F's and all of a sudden nothing will drop anymore). However, after a restart I was able to drop a couple of folders before it went back to not dropping. Another restart, but now can't drop....so apparently those two folders just sorta slipped through the cracks. Of course, I can drop into another folder ABSOLUTELY NO PROBLEM AT ALL.....but I can not drop it into the inbox or main account, so I can't get the folder to stay by itself!!! Ugh - nothing in any google search or mozilla search, so IDK what to do. I will not move this manually, I want to get to the bottom of why it drags, but only drops sometimes or into someplaces.