Passpack Browser Extension & Mobile App

Project Overview

Passpack is a team password management solution that helps organizations securely store, share, and manage passwords. Brownbyte was tasked with building the browser extension and mobile applications to extend Passpack’s functionality across platforms.

The Challenge

Passpack needed to expand beyond their web application to provide:

• Quick autofill capabilities directly in browsers
• Mobile access for users on iOS and Android devices
• Seamless synchronization across all platforms
• Maintain the same high security standards

Our Solution

Browser Extension

We developed a cross-browser extension (Chrome, Firefox, Edge) that provides:

Quick Autofill: One-click password filling on any website, saving users time and reducing friction.

Secure Storage: Passwords encrypted locally before syncing with Passpack servers, ensuring data security.

Smart Detection: Automatically detects login forms and suggests relevant credentials.

Biometric Authentication: Support for fingerprint and face recognition on compatible devices.

Offline Access: Cached credentials available even when offline.

Mobile Applications

We built native-feeling mobile apps for both iOS and Android using React Native:

Cross-Platform Development: Single codebase for both platforms, ensuring feature parity and faster updates.

Native Performance: Optimized for smooth performance and native UI components.

Secure Authentication: Biometric login, PIN codes, and master password options.

Offline Mode: Access passwords even without internet connection.

Auto-Sync: Seamless synchronization with web and extension versions.

Technical Implementation

Architecture

• Frontend: React for extension, React Native for mobile apps
• Backend: Node.js APIs for synchronization and authentication
• Security: AES-256 encryption, secure key derivation, two-factor authentication
• Infrastructure: AWS for hosting, CDN for fast global access
• Testing: Comprehensive unit and integration tests

Key Features Implemented

1. Secure Credential Storage: Encrypted storage with secure key management
2. Cross-Platform Sync: Real-time synchronization across web, extension, and mobile
3. Autofill Engine: Intelligent form detection and credential matching
4. Biometric Support: Fingerprint and face recognition on supported devices
5. Offline Functionality: Local caching for offline access
6. Security Auditing: Logging and monitoring for security events

Results

The browser extension and mobile apps have significantly enhanced Passpack’s user experience:

• Increased User Engagement: Users can now access passwords from anywhere, anytime
• Improved Security: Enhanced security features with biometric authentication
• Better User Experience: Seamless autofill saves users time and reduces password-related friction
• Platform Expansion: Extended Passpack’s reach to mobile users
• High Reliability: 99.9% uptime ensures users always have access to their passwords

Technologies Used

• React & React Native for cross-platform development
• TypeScript for type safety and better developer experience
• Node.js for backend services and APIs
• AWS for cloud infrastructure and hosting
• Browser Extension APIs for Chrome, Firefox, and Edge
• Native mobile APIs for biometric authentication and secure storage

Lessons Learned

This project reinforced the importance of:

• Security-first development in password management applications
• Cross-platform consistency for seamless user experience
• Offline functionality for critical applications
• Regular security audits and updates

The Passpack extension and mobile apps continue to serve thousands of users, providing secure and convenient password management across all their devices.