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Timo
869c64171b
The v2.5.2 Disney+ page-API integration leaked blob-relative <video> time into force sync, seeks, and heartbeats when the page-API bridge had no fresh data, so force sync on Disney+ appeared broken. - getSyncCurrentTime/getSyncDuration now refuse native values on Disney+ (return null/0) so stale bridge data degrades to a clean no-op instead of broadcasting garbage to peers. The get_current_time handler and episode/lobby/hcmIsLive paths are routed through the same accessor. - Validate FORCE_SYNC_PREPARE/SEEK payloads as finite before relaying; the internal coercion no longer treats '' as 0. - Stop double-routing FORCE_SYNC_PREPARE from the popup path (the generic popup route now covers only play/pause/seek). - popup force-sync: exclude null/empty peer times from the jump-to-others median (Number(null)===0 was dragging the target to 0), guard against NaN end-to-end, clear the dangling reset timer on failure, and retry without re-injecting when the content script responds but the Disney+ bridge has not yet delivered a finite time. - hcmIsLive skips the native-duration live signal on Disney+ only, preserving YouTube/Twitch Infinity-duration live detection. Disney-specific logic remains strictly gated to disneyplus.com; no Netflix/YouTube/Twitch/generic path is affected.
KoalaSync Browser Extension
A Manifest V3 Browser Extension (Chrome & Firefox) for synchronized video playback across any website.
Key Features
- 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.
- On-Demand Connection: The service worker only maintains a WebSocket connection while you're in a room. No persistent background connections — privacy-first architecture. Based on
connectIntentflag that gates all reconnect attempts. - Live Diagnostics: Built-in "Dev" tab for real-time video state debugging (ReadyState, CurrentTime, etc.).
- Dynamic i18n (Multi-Language): Fully localized in 13 languages (
en,de,fr,es,it,pl,tr,nl,ja,ko,pt-BR,pt,ru) with auto-detected fallback and dynamic on-the-fly language selectors.
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, toggle domain-based Noise Filtering, and switch the App Language.
- 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 performance and privacy.
Installation
- Prepare Extension: From the repository root, run:
npm run build:extension - Open Chrome and go to
chrome://extensions/. - Enable Developer mode (top right).
- Click Load unpacked and select the
dist/chromefolder.
Development
If you modify shared/constants.js, you must synchronize the changes by running the build script from the root:
npm run build:extension
This ensures that the extension/shared folder is updated with the latest protocol constants.
Module Structure
| File | Purpose |
|---|---|
background.js |
Service worker: message routing, tab listeners, startup |
content.js |
Video detection, audio processing, episode transition (IIFE) |
popup.js |
Popup UI: join/create, tabs, status, settings |
bridge.js |
Landing page bridge (injected into sync.koalastuff.net) |
episode-utils.js |
Shared extractEpisodeId() / sameEpisode() — used by background.js, injected into content.js at build time |
i18n.js |
Translation loader |
shared/ |
Constants, blacklist, name generator |