My places.sqlite file deleted all previous history on Jan 17th at about 11:07 PM all the way back to early December of 2023. Ccleaner was last run on Jan 11th and the browser settings are set to clear cache and cookies only. The computer was showing no issues and I did not discover the lost history until I pulled up the history four days later. The history identified only the past four days when the last week was selected. The sessionstore-backups folder showed files back to January 1st. What I cannot figure out is why the places. sqlite would just clear on its own and why I cannot activate any previous sessionstore file by following the mozilla firefox instructions below. https://support.mozilla.org/en-US/kb/how-restore-browsing-session-backup I only get the landing page with the option to restore the previous session grayed out. What common reasons are there for a places.sqlite file to wipe out a block of history and why would reactivate a previous session not work? Thanks!