Greasy Fork镜像

High-performance progress tracking for YouTube with minimal performance impact

Key updates in v3.3:

1. Fixed the ESLint warning in the throttle function by using proper block syntax
2. Reduced throttle time to 100ms for storage saves for better responsiveness
3. Maintained all previous optimizations:
- Selective observation
- Efficient DOM handling
- Smart cleanup
- Memory management
- Visibility filtering