Did you save the hard drive from the old computer? If so, you might be able to mount it as an external drive and get back your data.

Did you possibly reset the password of the Sync account because you forgot the password? Resetting the password for the Firefox Account will remove all data stored on the Sync server because this password is used to encrypt your data before it is uploaded to the Sync server and only this password can decrypt this data. S

Thanks for the suggestions. We did remove the hard drive from the old laptop to try to access the files but it is fully dead.

I do not remember the login info for Mozilla, user name or password since it was so long ago that I signed in. There is a chance I did reset the password. I have come to terms with the fact that I lost the bookmarks and passwords. My bad for not saving this login info. Lesson learned.

Did you take the old drive to a tech? It's possible it might be made useful. Might !

In the event that the passwords information is lost, you should record all information in a separate text file somewhere else on your hard drive, or written down. You can easily copy and paste if you need to do so. If you are concerned about someone else looking at that file, you can compress it using a password.