Privacy policy
Last updated November 12, 2026
Thinstream collects nothing. This covers the browser extension for Chrome, Firefox and Safari, and the Thinstream app that carries the Safari extension on Mac, iPhone and iPad.
- It makes no network requests of its own. There is no server, no analytics and no account.
- It runs only on youtube.com.
- It reads two things from the YouTube page you are on: the list of video formats with their sizes, and the caption track the YouTube player loads. Both stay in the page. They are used to show the transcript and the data estimate.
- It stores a few settings in your browser's local extension storage: whether listen mode is on, text size, caption language, the "hide recommendations" switch, and a running estimate of time listened and data saved. This never leaves your device.
- It keeps two small notes in YouTube's local storage while listen mode is on, so it can put your video quality and caption setting back when you turn it off.
- The app itself only shows how to turn the extension on. It collects nothing either.
Removing the extension or the app removes its stored settings.
Questions: alireza.toghiani@icloud.com