How do I transfer my saved passwords from my old computer to my new one.
Hi Ray, if you will have both computers active at the same time, it may be simplest to use Firefox Sync. More info: How do I set up Sync on my computer?
If you only have a backup of your old computer, or you prefer not to use Sync, you may have the relevant files on disk. They are stored in a hidden folder, so you need to set Windows to show hidden files and folders in order to find them. See: https://support.microsoft.com/en-us/windows/show-hidden-files-0320fe58-0117-fd59-6851-9b7f9840fdb2
This article has more information on the useful files: Recovering important data from an old profile