Developer Notes: This extension provides AI-powered virtual try-on functionality for online shopping. Key technical details: Architecture: - Pure JavaScript/HTML/CSS - no build tools or minification - Chrome Extension Manifest V3 (Firefox compatible) - Cross-browser compatible APIs Core Features: - Local storage of user profile photos - Integration with Freepik AI API for virtual try-on - Real-time image processing on supported shopping sites - Multi-language support (EN/ES/FR) User Flow: 1. User uploads full-body photo in options page 2. Adds free Freepik API key 3. Browses supported shopping websites 4. Clicks try-on button on clothing items 5. Sees AI-generated try-on result Testing Instructions: 1. Install extension 2. Open options (right-click extension icon → Options) 3. Upload test photo and add API key 4. Visit amazon.com/fashion or similar site 5. Look for try-on buttons on product images Firefox Specific: - All file operations moved to options page to prevent popup closing - Uses browser.storage.local for data persistence - Compatible with Firefox's extension security model The extension respects user privacy - all personal data stays locally stored.