UME - Ultimate Media Extention 作者： ABDev

✨ Complete Feature Set

🎮 Video Speed Control

• Advanced Speed Control: Adjust playback speed from 0.1x to 16x with precise increments
• Custom Speed Presets: Set your preferred default speeds for different content types
• Visual Speed Controller: Elegant on-screen overlay with real-time speed display
• Speed Memory: Automatically remembers and applies your last used speed to new videos
• Per-Website Settings: Different speed preferences for different websites

🔊 Volume Booster & Audio Control

• Volume Amplification: Boost audio volume up to 500% beyond browser limits
• Per-Domain Volume: Individual volume settings for each website
• Audio Enhancement: Professional-grade Web Audio API integration
• Safety Limits: Built-in protection against hearing damage
• Persistent Settings: Volume preferences saved across browser sessions

⌨️ Advanced Keyboard Shortcuts

• Speed Control: S (slower), D (faster), R (reset speed), G (preferred speed)
• Navigation: Z (rewind), X (advance), M (set marker), J (jump to marker)
• Volume Control: ↑ (louder), ↓ (quieter) - NEW in v3.0!
• Display Toggle: V (show/hide controller)
• Fullscreen Support: All shortcuts work perfectly in fullscreen mode
• Customizable Bindings: Modify any shortcut in the extension options

📊 Intelligent Media Tab Management

• Ultra-Conservative Tracking: Media tabs persist indefinitely until actually closed
• Simultaneous Playback Prevention: Only one tab plays audio/video at a time
• Smart Pause Management: Automatic pausing when switching between media tabs
• Restart Resilience: Tab tracking survives extension restarts and browser crashes
• Network Fault Tolerance: Communication failures don't break media management

🎛️ Professional Options Interface

• Tabbed Settings Panel: Organized settings across multiple categories
• Real-Time Configuration: Changes apply instantly without requiring restarts
• Website Blacklisting: Exclude specific domains from speed/volume control
• Keyboard Shortcut Customization: Full control over all key bindings
• Import/Export Settings: Backup and restore your configuration

🔒 Privacy & Security

Privacy-First Design

• ✅ Zero Data Collection: No personal information is gathered or transmitted
• ✅ Local Processing: All functionality runs entirely in your browser
• ✅ No External Connections: Extension doesn't communicate with any servers
• ✅ Transparent Permissions: Only requests necessary browser APIs
• ✅ Open Source: Complete source code available for inspection

Security Features

• ✅ Content Security Policy: Strict CSP prevents XSS attacks
• ✅ Isolated Execution: Content scripts run in isolated environments
• ✅ Permission Minimization: Requests only essential permissions
• ✅ Safe Volume Limits: Built-in protection against hearing damage

📈 Performance & Compatibility

Optimized Performance

• ⚡ Minimal CPU Impact: Efficient event-driven architecture
• ⚡ Low Memory Footprint: Smart resource management and cleanup
• ⚡ Battery Friendly: Optimized for laptop and mobile device usage
• ⚡ Fast Startup: Instant initialization and response times

Browser Compatibility

• 🟢 Chrome 88+: Full Manifest V3 support with service workers
• 🦊 Firefox 79+: Complete Manifest V2 implementation
• ✅ Edge Chromium: Compatible with Chrome extension
• ✅ Cross-Platform: Windows, macOS, Linux support

UME v3.0 integrates and builds upon the excellent work of these open-source projects:

🎬 Video Speed Controller Integration

• Original Project: Video Speed Controller by @igrigorik
• Repository: https://github.com/igrigorik/videospeed
• License: MIT License
• Features Integrated: Advanced speed control system, keyboard shortcuts, visual overlay controller
• Our Enhancement: Enhanced fullscreen support, per-domain settings, improved UI/UX, and integrated tab management

🔊 Volume Booster Integration

• Original Project: Better-Volume-Booster
• Developer: @zWolfrost
• Features Integrated: Web Audio API volume amplification, gain node management, audio enhancement
• Our Enhancement: Per-domain volume memory, popup controls, keyboard shortcuts, safety limits, and seamless integration with speed controls