VEIL collects no personal data. All processing request matching, cosmetic hiding, the activity ledger and the settings happens in your browser on your device, and nothing is sent to us or to any third party. The extension stores your settings and your block history in your browser's own storage; clearing the extension's data removes it. If you turn on optional settings sync, your preferences (not your history or pause state) are mirrored by your browser's built-in sync, which you can switch off at any time.