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This morning my Firefox prompted for an update and adding a mobile phone sync... in the process ALL bookmarks were lost. HELP.

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  • 1 has this problem
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  • Last reply by cor-el

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I tried fixes per suggestions, but there is no back-up to back up. All bookmarks are just plain gone. Can anyone help

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Did you try to reboot the computer?

Do you have automatically created compressed .jsonlz4 JSON backups in the bookmarkbackups folder available?

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You can check for problems with the places.sqlite and favicons.sqlite files in the Firefox profile folder.

  • use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page

In case errors are reported with "Verify Integrity" close and restart Firefox and retry.

If "Verify Integrity" cannot repair places.sqlite, rename/remove all places.sqlite and favicons.sqlite files in the Firefox profile folder. Firefox will rebuild places.sqlite and restore the bookmarks from a recent JSON backup in the bookmarkbackups folder.

  • keep a backup copy of places.sqlite in case a new places.sqlite database has to be created

See also:

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.