WhatsApp Web "lastseen" Chrome Extension. Some time ago I informed Facebook that the privacy setting "lastseen" in WhatsApp is totally useless. After a few e-mails thay told me they didn't consider this a security problem, but a feature clearly stated in WhatsApp T.O.S. Well, then why is there a useless security setting? Nevermind, I just coded a quick and dirty extension for google chrome so the "last seen" of the contacts hiding it, is shown next to their name! Enjoy the extension!