Extension Lab
A comprehensive battleground for browser extension developers. Test your extension's capabilities across DOM manipulation, storage, network requests, and more.
🔍 Current Browser Information
User Agent
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Cookies Enabled
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OfflineWindow Size
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Testing Modules
DOM Manipulation
Test content scripts, element injection, mutation observers, and shadow DOM interactions.
Forms & Inputs
Validate form filling, auto-complete, password management, and input handling.
Storage APIs
Test localStorage, sessionStorage, IndexedDB, and cookies manipulation.
Network & XHR
Intercept fetch requests, XHR calls, WebSocket connections, and API responses.
Media & Files
Test video/audio controls, file downloads, clipboard access, and media capture.
Events & Listeners
Test keyboard shortcuts, mouse events, custom events, and event delegation.
Popups & Modals
Test popup detection, modal handling, alert/confirm dialogs, and notifications.
Iframes & Frames
Test cross-origin frames, iframe injection, and frame communication.
Security & CSP
Test Content Security Policy, CORS, and security-related features.
Performance
Test performance APIs, timing measurements, and resource loading.
Accessibility
Test ARIA attributes, focus management, screen reader compatibility.
🚀 Quick Extension Test
Use these elements to quickly verify your extension is working:
Content area for injection testing:
Element ID: quick-test-input
Data attribute: data-testid="quick-input"