What stays on your device:
- Filter preferences (selected target languages, strict mode toggle, hide videos/channels toggles) are stored in your browser's sync storage so they follow you across devices logged into the same browser profile. This data never reaches our servers — we have no servers.
- Filter activity stats (videos filtered count, time reclaimed estimate, daily active streak) are stored in your
browser's local storage and never leave your device.
- A custom keyboard shortcut binding, if you set one, is stored locally.

What network calls the extension makes:
- It reads YouTube page content locally to detect each video's language. No video data, URL, or interaction is ever sent off-device.
- It fetches public Chrome Web Store stats (user count, rating) from img.shields.io to display on the welcome page.
This call sends only the extension's public Chrome Web Store ID; no user data is included.
- It does not contact any analytics, telemetry, or third-party tracking service.

Language detection is performed entirely on-device using Chrome's built-in chrome.i18n.detectLanguage API. No content is sent to any server for analysis.

Permissions used:
- "storage": for the local preferences and stats described above
- "activeTab" / "tabs": to apply filtering only to the YouTube tab you're viewing and to update the toolbar badge
- Host permission for ://.youtube.com/*: to inject the filter into YouTube pages
- Host permission for img.shields.io: solely to fetch the public store stats badge

Full policy and source code: https://github.com/vakkaskarakurt/YuLaF-Privacy/blob/main/PRIVACY.md
Source: https://github.com/vakkaskarakurt/YuLaF-YouTube-Language-Filter