I have a very long random password for https://www.anayaeducacion.es/index_alumnado.php and Firefox doesn't prompt to save it. The site owner has set autocomplete="off" but according to https://developer.mozilla.org/en-US/docs/Web/Security/Securing_your_site/Turning_off_form_autocompletion#The_autocomplete_attribute_and_login_fields that technique shouldn't prevent password manager from working. Also, none of these work: - Edit and remove the attributes with Inspector, bookmarklets or Firefox addons. - Edit "logins.json" manually to create an entry. Does the documentation I've linked only apply to other browsers? Is there a way to save this specific password so it gets autocompleted and synched across my devices?