You lose the history when a new places.sqlite is created. keep a backup copy of places.sqlite in case a new places.sqlite database has to be created.If 'Verify Integrity' cannot repair places.sqlite, rename/remove all places.sqlite and favicons.sqlite files in the Firefox profile folder with Firefox closed.įirefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder. If errors are reported with 'Verify Integrity', close and restart Firefox or reboot and retry. use 'Verify Integrity' button on the 'Help -> Troubleshooting Information' (about:support) page.This can be caused by a problem with the places.sqlite and favicons.sqlite databases in the Firefox profile folder. If you use Sync then best is to disconnect Sync temporarily during troubleshooting.