if you have an account connected to some other device try to synchronize mozzilla or else nothing can be done

Vittorio

Hi IftekharSayeed, which method are you using to view your bookmarks? For example:

• menu bar > Bookmarks
• optional Bookmarks Menu toolbar button ()
• Bookmarks Toolbar
• Bookmarks Sidebar
• Library window ("Show All Bookmarks" or Command+Shift+b)

If the Bookmarks Toolbar is not shown, try one of these methods to show the toolbar list and select it there:

• right-click (on Mac Ctrl+click) a blank spot on the tab bar (or the "+" button)
• (menu bar) View > Toolbars
• in Customize mode > Toolbars button (see: Customize Firefox controls, buttons and toolbars)

To turn on the Bookmarks Toolbar, click it on the list.

If you are getting the error message covered by the following article, please see the article for next steps:

Fix "The bookmarks and history system will not be functional" error message

Did you search the Bookmarks Manager (Library) in case you accidentally moved a folder to another folder?

If you use the Time Machine or other backup then try to restore file(s) from this backup.

• http://www.apple.com/support/timemachine/
• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

You can also try to restore a recent compressed .jsonlz4 backup in the bookmarkbackups folder.

• https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them

The name of an automatically created JSON bookmarks backup in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to prevent saving the same backup more than once. You also see this count in the Restore menu drop-down list.

• bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.