You could try retrieving lost passwords by using the logins-backup.json file in a user Profile folder of one of your devices. Although this would need to be done sooner rather than later.

If you do not know where the Profile folder is, see here: https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

Close all Firefox windows. Move logins.json to a backup folder. Copy logins-backup.json to a backup folder. Rename logins-backup.json to logins.json. Restart Firefox.

If this doesn't work you can always exit Firefox and then restore the original two files from the backup folder.

you can reset passwords if the site you are trying to get into have reset button and you have written your email its easy recovery