Hello, This link may guide you trough importing your bookmarks! https://support.mozilla.org/en-US/kb/import-bookmarks-html-file

Did you lose your bookmarks that you want to import bookmarks? *https://support.mozilla.org/en-US/kb/recover-user-data-missing-after-firefox-update *https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks Note that Firefox automatically daily creates a JSON backup when changes are detected (i.e. the current hash is different than the hash of the last backup). *https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them