my bookmarks diasappeared. Restore is empty.

Do you have an "Old Firefox Data" folder on the desktop in case you used the Refresh feature and created a new profile?

If you have an "Old Firefox Data" folder on the desktop then you can recover some personal data from a recent profile in that folder.

You can copy files like these to the current Firefox profile folder to recover specific data.

• bookmarks and history: places.sqlite
• bookmark backups: JSON backups in the bookmarkbackups folder
• SQLite files like cookies.sqlite (cookies) and formhistory.sqlite (saved form data)
• logins.json and key3.db (decryption key) for Passwords saved in the Password Manager
• cert8.db and possibly cert_override.txt for (intermediate) certificates stored in the Certificate Manager
• persdict.dat for words you added to the spelling checker dictionary
• permissions.sqlite for Permissions and possibly content-prefs.sqlite for other Site Preferences
• sessionstore.js for open tabs and pinned tabs and tab groups

• https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile

I have an "Old Firefox Data" folder on the desktop but it is from 2012.

That is most likely to old for you.

Is the bookmarkbackups folder empty?

Is there only one profile folder present if you check that in the default location for the bookmarks?

You can use this button to go to the current Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox

You can go up one level to see if there is only one profile.

• C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\

"AppData" (XP: Application Data; Mac: ~/Library; Linux: ~/.mozilla) is a hidden folder.

• http://kb.mozillazine.org/Show_hidden_files_and_folders