Manifest V3: Optimized Service Worker architecture with session persistence.
Pure Vanilla JS: No external dependencies or heavy libraries.
Smart Peer IDs: Hexadecimal IDs combined with customizable Usernames for easy identification.
Dual Heartbeat: Advanced session tracking (Background) and video synchronization (Content) to prevent ghost sessions.
Live Diagnostics: Built-in "Dev" tab for real-time video state debugging (ReadyState, CurrentTime, etc.).

Tab Overview

Room: Manage connections, view active peers, and share invitation links.
Sync: Control video playback (Play/Pause/Force Sync) and view recent activity.
Settings: Customize your Username and toggle domain-based Noise Filtering.
Dev: Monitor connection status and view real-time video element metadata for debugging.

Privacy & Permissions

KoalaSync requires <all_urls> permission to detect and interact with video elements (<video>) on websites.

No Browsing History: We do not track or store your browsing history.
State Management: Sensitive data (Room Passwords) is stored locally using chrome.storage.
Zero Telemetry: No analytics or external tracking scripts.
Zero Runtime Dependencies: The extension is built with pure Vanilla JS and contains no external libraries or tracking scripts, ensuring maximum performance and privacy.

Prepare Extension: From the repository root, run:
```
node scripts/build-extension.js
```
Open Chrome and go to chrome://extensions/.
Enable Developer mode (top right).
Click Load unpacked and select the dist/chrome folder.

If you modify shared/constants.js, you must synchronize the changes by running the build script from the root:

node scripts/build-extension.js

This ensures that the extension/shared folder is updated with the latest protocol constants.