Zoxifier does not collect, transmit, or share any user data. All settings and learned domain lists are stored locally in your browser (browser.storage.local) and never leave your device. The extension makes no network requests of its own, except the optional "Test connection" button, which fetches https://www.gstatic.com/generate_204 through your configured proxy to measure availability and latency. No analytics, no telemetry, no third-party services.