Sorry... FYI... SYNC IS NOT A DATA BACKUP SERVICE Sync info... https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer https://support.mozilla.org/en-US/kb/how-do-i-choose-what-information-sync-firefox https://www.mozilla.org/en-US/firefox/features/sync/ https://hacks.mozilla.org/2018/11/firefox-sync-privacy/ Sync is not a backup tool but it is a good sync/transfer/move tool https://support.mozilla.org/en-US/forums/contributors/707681

Assuming you maintain 1 profile, type about:profiles in the url bar & enter. If you have more than 1 profile there theres a chance your missing stuff may be there the non default one in a file named places.sqlite. While there, see if the folder bookmarkbackups is there. Post back.

there are indeed 2 profiles one marked as the default profile named "Default (release)" and one named Default Profile" that is currently not marked as the default profile the local directory is empty and the root directory only shows two files named "parent.lock" and "times.json" seems like i wont be able to get them back :,)