Browser Extensions Penetration TestingChrome, Firefox & Edge Extensions
Secure your browser extensions against vulnerabilities that could compromise millions of users' data and privacy.
Extension Security Assessment
Our browser extension testing identifies vulnerabilities that could lead to data theft, account takeover, or malicious script injection.
Extension Testing Coverage
Extension Security
Core extension security assessment
- Manifest security review
- Permissions audit and escalation
- Content script injection testing
- Cross-origin data leakage prevention
- Message passing validation
- DOM manipulation security
Data & Privacy
Data handling and privacy compliance
- Local storage security
- Cookie access validation
- Password manager integration
- Third-party library scanning
- Analytics code review
- Privacy policy verification
Runtime Security
Dynamic behavior and network security
- Background script vulnerabilities
- Service worker security
- Request interception testing
- WebRequest API security
- Web store compliance validation
- Extension update security
Extension Testing Methodology
Systematic approach to extension security
Static Analysis
Source code and manifest review
Key Activities
- Manifest.json security audit
- JavaScript code review
- HTML/CSS injection points
- Resource file analysis
- Build process review
Dynamic Testing
Runtime security assessment
Key Activities
- Extension behavior monitoring
- Network traffic analysis
- Storage manipulation testing
- Message passing exploitation
- Permission abuse testing
Integration Testing
Website interaction security
Key Activities
- Content script injection
- Cross-site data access
- Cookie theft attempts
- Form hijacking testing
- Clickjacking prevention
Privacy Assessment
User privacy protection
Key Activities
- Data collection analysis
- Tracking implementation review
- Third-party data sharing
- GDPR compliance check
- Privacy policy validation
Extension Security Benefits
User Trust
Build confidence with secure extensions
Data Protection
Prevent user data breaches
Store Compliance
Meet Chrome/Firefox store requirements
Brand Safety
Protect against reputational damage
Extension Security Deliverables
Comprehensive Security Reports
Executive and detailed technical reports with findings and evidence
Extension Hardening Guide
Security best practices for browser extension development
Privacy Impact Assessment
Data handling and privacy compliance evaluation