BTC51 Extension Privacy Policy

Overview

BTC51 is a Bitcoin dashboard browser extension that displays real-time Bitcoin data, price alerts, and portfolio tracking tools. This privacy policy explains how we handle your information.

Data Collection

What We DO NOT Collect

• No personal information - We do not collect names, emails, or any personally identifiable information
• No tracking - We do not track your browsing history or behavior
• No analytics - We do not use any analytics or tracking services
• No server storage - We do not store any of your data on external servers
• No account required - No registration or sign-in needed

What Is Stored Locally

All data is stored locally on your device using Chrome's built-in storage API (chrome.storage.local):

• Price alert settings (target prices you set)
• Portfolio holdings (BTC amounts and cost basis you enter)
• User preferences (language, theme, refresh interval, notification settings)
• Monitoring preferences (which alerts are enabled)
• Alert history (past triggered alerts)

This data never leaves your device and is only accessible by you.

External API Requests

The extension fetches public Bitcoin data from these third-party APIs:

These are standard GET requests to public APIs. No personal data, cookies, or identifying information is sent with these requests.

Permissions Explained

Data Sharing

We do not share, sell, or transmit any user data to any third parties. All functionality is self-contained within the extension.

Security

• All API requests use HTTPS encryption
• No external scripts are loaded
• Content Security Policy (CSP) restricts code execution to prevent XSS attacks
• No authentication tokens or API keys stored
• No remote code execution

Your Rights

You can:

• Export your data - Use the CSV export feature in the Portfolio tab
• Delete your data - Uninstalling the extension removes all locally stored data
• Control notifications - Toggle all alert types on/off in settings

Children's Privacy

This extension does not knowingly collect any information from children under 13 years of age.

Changes to This Policy

This policy may be updated when new features are added. Material changes will be reflected in the "Last Updated" date. Continued use after changes constitutes acceptance.

Contact

For questions about this privacy policy:

• Website: btc51.org
• Twitter: @BTC51org

Open Source

This extension's source code is available for public review to verify our privacy practices.