Background Playback Helper (YouTube & Vimeo) nga Phase3

• Firefox for Android: Helps maintain background audio playback when switching apps or locking the screen.
• Firefox Desktop: Prevents videos from pausing when switching tabs and stabilizes playback when loading video sites in Firefox sidebar or DevTools responsive mode. Verified compatible with Firefox Desktop on Windows. Other desktop platforms are not officially tested.
• Active Status Indicator: Automatically detects supported sites and displays a green icon and badge to indicate when the helper is active.
• Dark Mode UI: Minimal, dark-themed popup interface for toggling features.
• Optional Keep-Alive: Sends harmless, non-character activity signals that may reduce inactivity-based pauses on some players.
• Privacy Focused: All logic runs locally. No user data is collected or transmitted.

Version 0.4.1: Release Notes

• Fixed Firefox for Android issue where the extension options panel would not open while media was playing.
• Improved background playback reliability on YouTube Music and supported sites when the browser is minimized or the screen is locked.
• General stability improvements for tab switching and visibility handling.

Version 0.4.0: Release Notes

• Added master enable/disable toggle
• Improved background playback reliability
• Added main-world visibility handling for better compatibility
• Improved popup UI and control behavior
• Improved icon and badge status indicators