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Hi Tanyta At the right hand side of your bookmarks toolbar is an icon '''>>>''' Do the lost folders appear as a vertical list if you click that icon ? Have you looked in your bookmarks manager library use keyboard shortcut Ctrl +Shift +B {English keyboard; Windows) * [[Keyboard shortcuts - Perform common Firefox tasks quickly#w_bookmarks]]'''_bookmarks''' Or bookmarks icon -> show all bookmarks. Can you find the missing bookmarks or folders there. Maybe they have moved from the menu folder to the toolbar folder. There maybe methods of returning some of this to what it was before but first of all immediately back up your profile and put a copy somewhere safe. * [[Back up and restore information in Firefox profiles]] *Have you been using Firerfox sync ? <br /> ^{[[How do I set up Firefox Sync?]]} * Have other devices got similar bookmarks ?