Using someone else's account details without their explicit permission is a violation of Netflix’s terms of service and, in many jurisdictions, is considered a form of digital theft. Better Ways to Save on Netflix
Netflix cookies are notoriously unstable. Since they rely on an active session, the cookie expires the moment the actual account owner logs out or clears their browser cache. This means you might spend an hour finding a working cookie only for it to stop working ten minutes into a movie. 3. Account Bans Free Netflix Premium Cookies