Yield: Website Focus Guard stores extension data on your device only.
Yield stores:
Yield does not sell, transfer, or share user data with third parties.
Yield does not use a backend server, analytics service, advertising network, or account system.
Yield does not load or execute remotely hosted code. All executable code is included in the extension package.
Users can delete blocked sites, delete custom messages, clear stats, or export/import their own JSON data from the dashboard.
For privacy questions, contact the developer through the support information listed on the Chrome Web Store page.