TubeCourier is committed to user privacy. The extension contains zero telemetry, zero analytics, and contacts no external or author-operated servers. All network traffic, cookie synchronization, and download requests occur strictly and directly between the user's web browser and their explicitly configured self-hosted MeTube server. All configuration preferences are stored locally in the browser profile. Full open-source repository and disclosures are available at https://github.com/covarianttensor/TubeCourier.