KoalaSync

Release Status GitHub release License Firefox Add-on Chrome Extension

KoalaSync is a lightweight Browser Extension and Relay Server for synchronized video playback on almost any website with a video elementโ€”YouTube, Twitch, Netflix, Emby, Jellyfin, and beyond. Built with a focus on Data Sovereignty and Performance.

### ๐ŸŒŸ Why KoalaSync? * **๐Ÿ›ก๏ธ Security-First**: Volatile RAM-based relay with built-in brute-force protection and zero-persistence architecture. * **๐Ÿ“ก Direct Logic**: Manual Socket.IO wire implementation for reliable synchronization. * **๐Ÿ› ๏ธ Clean Build**: Dependency-free extension runtime with no library overhead. * **๐ŸŒ Universal**: Works on any website with a `