Strict URL Whitelist is a Chrome extension designed to enforce strict navigation rules by allowing only specific URLs. Utilizing the declarativeNetRequest API, it enables users to define an allowlist of approved domains, paths, and optional query parameters. This lightweight tool operates entirely at the network level without requiring any scripts or page interactions, ensuring seamless and immediate enforcement of navigation restrictions. The background service worker dynamically updates rules based on user-defined configurations, optimizing both performance and reliability.

The extension's functionality includes blocking all main_frame requests by default and redirecting unmatched requests to a blank page. Users can create precise rules that include domain, path, and strict query string matches, allowing for robust control over web navigation. With no external requests, telemetry, or script access, Strict URL Whitelist prioritizes user privacy while providing a straightforward approach to managing web access for personal or enterprise needs.