Firefox for Android Community Forum

My phone broke down and I had to send it in, for it to be repaired. As usual for warranty repairs the phone needed a factory reset to be sent in. Before doing that I backed up my session using Firefox sync as described here: https://support.mozilla.org/en-US/products/mobile/backup-recovery-and-sync/backup-data That went fine and I could access the data from my PC.

Now my phone returned, I reinstalled firefox yesterday and immediately after signing in, my backup in Sync was overwritten with a blank session. Is there any way to get the old session back?

Sync has been mostly usable the past 2 yrs and now all my data is randomly gone. I had a android and desktop syncing and nothing else. Are there backups or previous versions of saved data? This right here is what I feared for so many years.... Where's my data? Don't send me generic answers. Is there a backup on a server or not? If so give it up