DarkB44 does not collect, store, transmit, or sell any user data. It has no analytics, no tracking, and makes no network requests. The only data it saves are your own theme preferences (theme, accent color, effect toggles, schedule times), stored locally in your browser and optionally synced between your devices by your browser's built-in sync. This data never reaches the developer or any third party. Uninstalling the extension removes it.