FINGER

FINGER – Privacy Monitoring & Fingerprinting Blocker for Google Chrome Overview FINGER is a next-generation Chrome extension that detects and blocks browser fingerprinting techniques in live time, ensuring your online identity remains private. Unlike traditional privacy tools that rely on static blocklists, FINGER uses a behavior-based approach to intercept fingerprinting attempts at the JavaScript level—providing transparency, control, and active protection. Why FINGER? Browser fingerprinting silently collects unique device and behavioral characteristics to track users across websites—even when cookies are disabled. Existing tools fail to address this threat. FINGER closes this gap by offering: Active Blocking: Stops fingerprinting attempts before they can extract identifying information. Dynamic Detection: Identifies fingerprinting behaviors, even when scripts are obfuscated or dynamically loaded. Entropy-Based Analysis: Calculates an approximate entropy score for each attempt, helping users understand their exposure. Local Execution: All analysis and blocking happen within your browser—no data leaves your device. Minimal Permissions: Requires only ActiveTab, reducing attack surface and aligning with best security practices. Modular Architecture: Easily extend detection and blocking capabilities with new modules. Open Source: Transparent, auditable, and community-driven under the MIT license. Key Features Live-Time Blocking & Monitoring: Detects and prevents fingerprinting attempts as they occur. Comprehensive Coverage: Intercepts JavaScript method calls, property accesses, and API usage patterns linked to fingerprinting. User-Friendly Interface: View blocked attempts and entropy scores through an intuitive dashboard. Research-Ready: Ideal for academics and developers studying fingerprinting behaviors or auditing web applications. Future-Ready: Designed for modular updates, with planned features like iframe detection and cross-browser support. Use Cases Privacy-Conscious Users: Actively block fingerprinting attempts during browsing sessions. Researchers & Educators: Demonstrate fingerprinting concepts and analyze behaviors in live time. Web Developers: Audit your applications for unintended fingerprinting behaviors and ensure compliance. Community Contributors: Extend detection and blocking logic through modular configuration files. How It Works FINGER uses advanced JavaScript interception techniques: Method Overriding: Replaces native functions commonly exploited for fingerprinting. Object Property Modification: Redefines properties like navigator.userAgent or screen.width to prevent data leaks. Proxy Objects: Wraps dynamic objects for comprehensive monitoring and blocking of complex interactions. Comparison with Existing Tools Unlike AdBlock Plus, uBlock Origin, Privacy Badger, or Disconnect—which rely on static lists—FINGER focuses exclusively on behavioral fingerprinting detection and blocking. It complements these tools by addressing a critical gap in privacy protection. Future Roadmap Enhanced iframe and embedded context detection. Cross-browser compatibility (Firefox, Edge, Safari). Configurable user policy engine for custom blocking strategies. Integration with research platforms for large-scale studies. Open Source & Community Explore the code, contribute, or audit at: https://github.com/vortexcolab