Until recently I, or any other member of my family, have had no problems with our log-in and password popping up when I/we sign into Facebook. But now I find that they are disappearing after a short time and I have to reenter them, and they will stay there for a few days. Any more than two now will not show up when before we could have all four show up (we manage each others accounts). I have not made any other changes to Firefox as far as those settings go, so what else could be happening here?