My Firefox upgraded to 18.0.1 this morning automatically and all my bookmarks were lost. I need them back
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TonyE 3 months ago Sorry that this has happened, but it is not typical behavior.
Firefox automatically created backup copies of the bookmarks, for details of how to restore bookmarks from a backup see this support article - Restore bookmarks from backup or move them to another computer
This support article may also be of use - Recover lost or missing Bookmarks
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cor-el 3 months ago You can check for problems with the places.sqlite database file in the Firefox Profile Folder.
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jim_garry 1 week ago "Not typical behavior". I think not. I am yet another person this happened to. Even if I can get them back, you've just wasted an hour or two of my time. I won't be using firefox again after I've recovered my bookmarks. If I recover them. Thanks for nothing.
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cor-el 1 week ago You should be able to fix this easily because Firefox keeps ten JSON backups in the bookmarkbackups folder, one each day that you start Firefox.
So a lot must go wrong like a full profile loss to lose all bookmarks.If rebooting or deleting all places.sqlite files like I posted above didn't make the bookmarks reappear then you can try to restore them manually in the Bookmarks Manager (Library).