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PRIVACY_POLICY.md

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Privacy Policy for Chromium Mask

Last Updated: October 29, 2025

Overview

Chromium Mask is committed to protecting your privacy. This privacy policy explains how our extension handles data and what information, if any, is collected during its use.

Data Collection

What We DO NOT Collect

  • Personal Information: No personal data such as names, email addresses, or user identifiers
  • Browsing History: No tracking of websites you visit or pages you view
  • Search Queries: No recording of your search terms or browsing patterns
  • Login Credentials: No access to usernames, passwords, or authentication data
  • Device Information: No collection of device specs, installed software, or hardware details
  • Location Data: No geolocation or IP address logging
  • Analytics: No usage statistics, crash reports, or behavioral analytics

What We DO Collect

Nothing. This extension operates entirely locally on your device.

Data Storage

Local Storage Only

  • Site Preferences: Your enabled/disabled sites list is stored locally in your browser
  • Settings: Extension configuration is saved locally using your browser's built-in storage API
  • Cache: Chrome version information is cached locally for performance
  • No Cloud Storage: No data is uploaded to external servers or cloud services

Data Persistence

  • All data remains on your device
  • Data is automatically removed if you uninstall the extension
  • You can clear extension data through your browser's settings at any time

Network Requests

Chrome Version Updates

The extension makes a single daily network request to maintain up-to-date Chrome version spoofing:

  • Endpoint: chrome-mask-remote-storage.0b101010.services/current-chrome-major-version.txt
  • Purpose: Fetch the current Chrome major version number
  • Frequency: Once every 24 hours (configurable via browser alarms)
  • Data Sent: No user data or identifiers are transmitted
  • Data Received: Only a plain text Chrome version number (e.g., "131")
  • Security: All requests use HTTPS encryption

Request Details

  • Method: GET request
  • Headers: Standard browser headers only, no custom tracking headers
  • Response: Plain text version number only
  • Logging: The remote service does not log requests or IP addresses
  • Infrastructure: Hosted on Cloudflare R2 with no server-side logic

Third-Party Services

Cloudflare R2

  • Purpose: Hosts the Chrome version update file
  • Data Processing: No user data is processed or stored
  • Privacy: Subject to Cloudflare's privacy policy for infrastructure only
  • No Tracking: No analytics, cookies, or tracking mechanisms

Permissions Explained

The extension requires certain permissions to function:

  • Storage: Save your site preferences locally
  • Tabs: Access current tab URL to enable per-site functionality
  • Host Permissions (<all_urls>): Modify request headers on sites you choose to enable
  • Scripting: Inject JavaScript to spoof browser properties
  • Alarms: Schedule automatic Chrome version updates
  • Declarative Net Request: Modify User-Agent headers in network requests

Important: These permissions are used solely for the extension's functionality and never for data collection.

Data Security

Local Security

  • All data is stored using your browser's secure storage APIs
  • No data is transmitted to external parties
  • Extension follows browser security guidelines and best practices

Network Security

  • Chrome version updates use HTTPS encryption
  • No sensitive data is transmitted over the network
  • Minimal attack surface due to limited network activity

User Rights

Data Control

  • Access: View your enabled sites through the extension's options page
  • Modify: Add or remove sites from the enabled list at any time
  • Delete: Clear all extension data by uninstalling the extension
  • Export: No data export needed as everything is stored locally

Transparency

  • Source code is available for inspection
  • This privacy policy is included with the extension
  • No hidden data collection or tracking mechanisms

Changes to This Policy

Updates

  • Policy changes will be reflected in extension updates
  • Users will be notified of significant privacy changes
  • Version history maintained in the extension's changelog

Notification

  • Material changes will be highlighted in release notes
  • Users can review changes before updating the extension

Contact Information

For privacy-related questions or concerns:

Compliance

This extension is designed to comply with:

  • Chrome Web Store policies
  • General Data Protection Regulation (GDPR) principles
  • California Consumer Privacy Act (CCPA) guidelines
  • Browser extension privacy best practices

Children's Privacy

This extension does not knowingly collect information from children under 13. The extension's functionality is not directed toward children, and no age verification is performed.

International Users

This extension operates the same way for all users regardless of location. No geographic data collection or region-specific data processing occurs.

Summary: Chromium Mask is designed with privacy-first principles. It collects no user data, operates locally, and only makes minimal network requests to maintain functionality. Your browsing habits, personal information, and privacy remain completely protected.