Privacy Policy - Web Vitals Extension Enhanced

Effective Date: October 30, 2025

Developer: jmfernxndez (me@jmfernandez.dev)

        TL;DR: Zero tracking, zero data collection. API calls only when you open Server/DNS tabs. All processing happens locally in your browser.
    

Single Purpose Statement

This extension provides comprehensive website performance and infrastructure analysis by combining Core Web Vitals metrics with server geolocation and DNS record lookups. It allows developers and SEO professionals to analyze website performance, hosting infrastructure, and DNS configuration without switching between multiple tools.

Data Collection

This extension collects zero user data. No personal information, browsing history, or user behavior is tracked, stored, or transmitted.

How It Works

Web Vitals Tab

Metrics calculated locally in your browser using Chrome's Web Vitals API
No data sent to external servers
All processing happens on your device

Server Info Tab

Only activated when you manually open this tab
Sends only the domain name to ipwhois.app API for geolocation lookup
No personal data or browsing history transmitted
Response displayed directly to you and not stored

DNS Info Tab

Only activated when you manually open this tab
Queries Google's public DNS API with only the domain name
No personal data or browsing history transmitted
Response displayed directly to you and not stored

Third-Party API Services

This extension uses two free public APIs:

ipwhois.app - Server geolocation data
Google DNS API - DNS record lookups

Both services receive only the domain name being analyzed. Review their privacy policies:

ipwhois.app: https://ipwhois.io/privacy
Google DNS: https://developers.google.com/speed/public-dns/privacy

What We Don't Do

No tracking or analytics
No cookies
No user accounts or authentication
No data storage or logging
No personal information collection
No browsing history access
No sale, transfer, or sharing of any data with third parties

Permission Justifications

tabs

Required to access the current tab's URL to display the domain name in the extension popup and to measure Web Vitals performance metrics for the active webpage.

storage

Required to save user preferences for the extension interface (such as selected tab view) locally in the browser. No data is sent externally. All storage is local to your device.

activeTab

Required to read the current webpage's URL and inject Web Vitals measurement scripts to calculate performance metrics (LCP, CLS, INP, FCP, TTFB) on the active tab only.

scripting

Required to inject Web Vitals measurement code into the active webpage to collect performance metrics. Scripts only execute on the current tab and only measure performance data locally.

Host Permissions (:///)

Required to measure Web Vitals on any website the user visits and to make API calls to ipwhois.app and Google DNS for server and DNS information lookups. The extension only accesses sites when actively opened by the user.

Remote Code Usage

This extension does NOT use remote code.

All JavaScript code is included in the extension package. The extension makes HTTPS API calls to ipwhois.app and Google DNS APIs to fetch server geolocation and DNS records, but these are data requests, not code execution. No external JavaScript files are loaded or executed. No eval() or similar dynamic code execution is used.

Data Transfers

I certify that:

I do not sell or transfer user data to third parties
I do not use or transfer user data for purposes unrelated to the extension's single purpose
I do not use or transfer user data to determine creditworthiness or for lending purposes

Data Storage and Retention

All data is ephemeral and exists only while the extension popup is open. When you close the popup, everything is cleared from memory. The only persistent data is user interface preferences stored locally via chrome.storage.local.

Open Source

This extension is open source. You can inspect all code at the GitHub repository to verify these privacy claims.

Changes to This Policy

If this policy changes, the effective date will be updated. Continued use of the extension constitutes acceptance of any changes.

Your Rights and Control

You have complete control over this extension. Uninstall it anytime from chrome://extensions and all functionality stops immediately. No data persists after uninstallation.

Contact

Questions or concerns? Email me at me@jmfernandez.dev

Last updated: October 30, 2025 | Web Vitals Extension Enhanced by jmfernxndez