My iMAC desktop computer crashed yesterday and ultimately I ended up having to go into recovery mode, erase the hard drive to reinstall the OS and then restore the applications and files from TimeMachine using Migration Assistant. All of that worked fine, but Firefox was still hanging up, so I deleted it and downloaded the most recent version. That of course wiped out all of my bookmarks. I used Time Machine to restore the "bookmarksbackup" folder as shown in the image below. That did not help, at least in terms of restoring my bookmarks to Firefox. I noticed that a second profile had been created, so I copied the same list of files to the bookmarksbackup folder under that profile. Still no help. It occurred to me that perhaps there is another place where the current active bookmark file should live, but if that is the case, I can't figure out where that might be. I'm quite stuck and really need access to my bookmarks. Any suggestions are greatly appreciated!

PS: I've since run a thorough virus scan using Microsoft Defender and checked disk integrity using DiskUtility.