I did try some other dates and got the same message..........
So I took a break for a little bit, as I was a little stressed out....and came back, started up Firefox again just now and all over a sudden there's all the missing stuff back !
I checked again to see what version it says I have now, and it shows as Firefox 56.0....and asking if I wanted to upgrade to 72.0. ( the last time I checked it said I was using something different...whatever it was I posted earlier)
We'll, before I mess around with changing anything I want to now see if i can use Trainz download station again ! That's what started this mess to begin with.
I'll post once more to let you know if can download again. I have to see if passwords work again too. Again, thanks to everyone who helped.
Update: Yes, I can download again from DLS with this version 56.0. Thanks to all who chipped in their time and talents to help me with this nerve racking dilemma. Amazing that all of a sudden, after opening and closing Firefox several times, including rebooting the PC, with no changes that all of a sudden all the info came back. It probably didn't hurt that before it came back I said privately " Dear Lord, I've got this little problem that I wonder if you could help me out with". I should have started with that first.