# Coplay

> Synchronously play your videos in two browsers.

Canonical page: [https://chrome-stats.com/d/coplay](https://chrome-stats.com/d/coplay)

## Overview

- **ID:** `coplay`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Justineo
- **Category:** social-communication,games-entertainment
- **Daily users:** 21
- **Rating:** 3.67 / 5 (3 ratings)
- **Version:** 0.6.0
- **Last updated:** 2020-02-10
- **First published:** 2016-07-11
- **Size:** 57 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/coplay/)

## Description

Coplay is a Firefox add-on that allows users to play web videos in sync on two browsers. With WebRTC and PeerJS, connect and control video players simultaneously on popular platforms like Youku, YouTube, and more.

## Rankings

- #23,829 — Overall
- #162 — play

## Permissions and access

### Permissions

- `http://*.youku.com/*`
- `https://*.youku.com/*`
- `http://*.sohu.com/*`
- `https://*.sohu.com/*`
- `http://*.tudou.com/*`
- `https://*.tudou.com/*`
- `http://*.qq.com/*`
- `https://*.qq.com/*`
- `http://*.iqiyi.com/*`
- `https://*.iqiyi.com/*`
- `http://*.youtube.com/*`
- `https://*.youtube.com/*`
- `http://*.acfun.cn/*`
- `https://*.acfun.cn/*`
- `http://*.bilibili.com/*`
- `https://*.bilibili.com/*`
- `http://*.mgtv.com/*`
- `https://*.mgtv.com/*`
- `http://*.vimeo.com/*`
- `https://*.vimeo.com/*`
- `activeTab`
- `webNavigation`
- `storage`
- `tabs`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Low 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 has low user count. Unpopular extensions may not be stable or safe.

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

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- [VideoSync](https://chrome-stats.com/d/videosync) — 4 users

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