Watch Later UX Toolkit runs only on youtube.com pages that match the extension permissions in manifest.json.

It stores filter state such as search text, duration filter, hide-watched toggle, and panel position locally in the browser using extension storage.

When you use Copy visible links or the ChatGPT summary action, the extension writes text to your clipboard on your device.

The extension does not send data to a developer-operated server. When you click the ChatGPT button for a video, the extension opens an internal extension page that checks Firefox's built-in data consent for website content transmission. If you grant that optional Firefox consent, the extension opens https://chatgpt.com/ in a new tab and includes the video title and video URL in the query it sends to ChatGPT.

The extension does not include analytics, advertising, telemetry, or background tracking, and it does not sell personal data.