I suggest posting this problem on the Mozilla Support site. They have a team of support volunteers to troubleshoot malfunctions with your currently installed version of Firefox, while this site is focused on idea submissions for future versions of Firefox (looking ahead anywhere from 8 weeks to many months). Here's a link to the new question form (for Windows/Mac/Linux): https://mzl.la/3y1vQUQ
But here's a preview of what I would say over there:
Firefox normally makes daily backups of your bookmarks when they are changing, so you should be able to roll back your home bookmarks to a previous day using the Restore feature. More info in the following article: https://support.mozilla.org/kb/restore-bookmarks-from-backup-or-move-them
