Quiet Hours — Daily Sudoku does not collect, store, transmit, or share any personal data. The extension uses Chrome's local storage (chrome.storage.local) only to remember your selected puzzle difficulty (easy, medium, or hard) on your own device. This information never leaves your browser and is never sent to any server, developer, or third party. The extension makes no network requests, includes no analytics or tracking, and uses no remote code — all puzzle data is bundled directly in the extension package.