"The ephemeral nature of a cookie — a tiny text string of session data — belies its power. In the context of Netflix, a cookie isn't just a reminder of your login; it is your identity. The SecureNetflixId and NetflixId cookies contain your account fingerprint, region token, and playback authorization.
She never opened that show.
FADE TO BLACK. If you meant a by that name, please clarify and I’ll give an even deeper piece. Otherwise, pick the angle above that fits — and I can expand it further. Cookie Editor Netflix Script