Web Sniffer Privacy Policy

Last updated: September 22, 2026

Web Sniffer is a Chrome DevTools extension for monitoring and validating analytics network traffic. This policy comprehensively describes our practices regarding user data collection, handling, storage, and sharing.

1. Data Collection

Web Sniffer collects the following types of data:

• Captured network data: Request and response bodies, headers, page URLs, and extracted analytics events processed inside Chrome DevTools.
• User preferences: Saved collections, rules, filters, snapshots, and header rules.
• Authentication and License data: Firebase auth token, basic profile (email), and license key if you sign in or activate a Pro license.
• Anonymous usage data: When enabled, basic telemetry (which DevTools tab is opened, date, and extension version) is collected. No captured traffic or page URLs are collected.

2. Data Handling and Use

The collected data is handled and used exclusively for the following purposes:

• Providing the core extension functionality: capturing, filtering, and displaying DevTools network data (including page URLs) and running validation scripts.
• Maintaining your user session and preferences between DevTools sessions.
• Verifying your identity via Google Firebase Authentication.
• Validating Pro access against Firestore license documents.
• Improving the extension based on anonymous usage metrics (only if enabled).

We do not track your browsing history outside the DevTools-inspected page context.

3. Data Storage

Data storage is primarily local to your device:

• Captured network data remains entirely on your local machine in extension storage and session memory. We do not transmit captured HAR entries, analytics events, or page content to our servers.
• Saved collections, rules, and user preferences are stored locally in chrome.storage.local.
• Authentication sessions and license keys are cached locally for offline validation.

4. Data Sharing

We do not sell your personal data. We strictly limit data sharing to the following third-party service providers necessary to operate the extension:

• Google Firebase Authentication: When you create an account or sign in, your email address and authentication credentials are shared with Google Firebase to verify your identity.
• Google Firestore: Your user ID and license key are shared with Firestore solely for the purpose of checking license validation and fetching public app configuration.

Other than the explicitly mentioned service providers (Google Firebase), we do not share your user data (including page URLs or captured network data) with any other third parties.

Permissions

Web Sniffer requests Chrome permissions to capture DevTools network data, run validation scripts in the inspected page, apply header/redirect rules, and manage sign-in. These permissions are used only to provide extension functionality described above.

Contact

Questions about this policy? Contact the developer through the Chrome Web Store listing support channel.