# YouTube Audio/Video Sync

> Fix wireless audio streaming delay for YouTube

Canonical page: [https://chrome-stats.com/d/youtube-av-sync](https://chrome-stats.com/d/youtube-av-sync)

## Overview

- **ID:** `youtube-av-sync`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** adrian.ilie
- **Daily users:** 363
- **Weekly downloads:** 32
- **Rating:** 2.46 / 5 (35 ratings)
- **Version:** 0.1.4
- **Last updated:** 2023-07-16
- **First published:** 2020-05-06
- **Size:** 254 KB
- **Data as of:** 2025-07-19
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/youtube-av-sync/)
- **Website:** [https://groups.google.com/forum/#!categories/youtube-audiovideo-sync/firefox-addon](https://groups.google.com/forum/#!categories/youtube-audiovideo-sync/firefox-addon)

## Description

The YouTube Audio/Video Sync Chrome extension addresses the common problem of audio delay when streaming YouTube videos wirelessly to receivers like Apple TV, AirPlay speakers, Sonos, Bluetooth devices, and more. Unlike music, video content is susceptible to audio-video sync issues, making viewing frustrating. 

This extension enables a one-time setup where users play a YouTube video, adjust a latency slider via the addon’s options until audio matches the video perfectly, and enjoy synced playback. Users can enable or disable synchronization easily through the extension icon. By muting the original video audio and reloading it with the adjusted delay, it corrects the lag without complicated setups. Note that it does not support YouTube Live videos and functions only on the main youtube.com domain, not embedded players.

Open source and GPLv3 licensed, this tool empowers users to watch YouTube videos in perfect sync when streaming audio wirelessly, enhancing overall viewing experience.

## Permissions and access

### Permissions

- `webRequest`
- `*://*.googlevideo.com/*`
- `*://*.youtube.com/*`
- `storage`
- `tabs`

### Content script matches

- `*.youtube.com`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension is not longer available in the store

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

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Source: [Chrome-Stats](https://chrome-stats.com/d/youtube-av-sync)