Hello dear admin I lost all of my bookmarks and try many ways to recover them as example , uninstall and install firefox or restore from previous backup , or import from file , or import from another browser like edge ,.... but didnt work even I cant add any new bookmark in my toolbar or bookmarks menu I read and did all of internet guid in mozilla forum but cant back them up . thank you.
This part can indicate a problem with the Places database that stores your bookmarks and history:
... I cant add any new bookmark in my toolbar or bookmarks menu ...
Hopefully you already tried doing a regular shutdown and restart of Windows to clear up any file locks that might be preventing changes. If not, please try that next.
Did you already find this article: Fix "The bookmarks and history system will not be functional" error message?