Firefox normally keeps automatically created compressed .jsonlz4 backups in the bookmarkbackups folder. Did you check that out ? *https://support.mozilla.org/en-US/kb/restore-bookmarks-from-backup-or-move-them See also: *https://support.mozilla.org/en-US/kb/recover-lost-or-missing-bookmarks

''<p>odonovanse [[#question-1351093|said]]</p>'' <blockquote>. . . and got the message that they were corrupted, unusable. GONE. </blockquote> Are they corrupt or are the files gone? http://kb.mozillazine.org/Unable_to_process_the_backup_file_-_Firefox jscher2000 has a tool on his website to extract out your bookmarks and save them to an HTML-format bookmark export file. If you want to try it, here is the page: https://www.jeffersonscher.com/res/bookbackreader.html To open the bookmarkbackups folder in Finder, use the "Open in Finder" button in the first table on the Troubleshooting Information page, and double-click into bookmarkbackups where you should see several dated files. From there you can drag and drop onto the conversion tool. To import the HTML file, see the steps in this article: [https://support.mozilla.org/en-US/kb/import-bookmarks-html-file Import Bookmarks from an HTML file.]