Synchronously play your videos in two browsers.

Coplay promo image
What is Coplay?

Coplay is a Firefox add-on by Justineo. This add-on has 106 daily active users and an average user rating of 3.67. The latest version, 0.6.0, was updated 3 years ago.

Stats date:
Users: 106 ▲ 1
Rating: 3.67 (3)
Version: 0.6.0 (Last updated: 2020-02-10)
Creation date: 2016-07-11
Weekly download count: 3
Firefox on Android: Yes
Manifest version: 2
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Size: 58.77K
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Found a bug?

Other platforms

Not available on Chrome
Not available on Edge
When two browsers are playing the same web video, Coplay can connect them with WebRTC (using PeerJS) and enable users to control two video players synchronously.

Coplay now works on Youku, Sohu TV, Tencent Video, Tudou, iQiyi, YouTube bilibili, LETV and Vimeo.

Buttons on control bar stands for "connect"/"disconnect", "play", "pause", "sync" and "restart".
Risk impact

Coplay requires a number of risky permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Coplay if you trust the publisher.

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Coplay has earned a fairly good reputation and likely can be trusted.

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on, especially ones with higher risk impact and/or higher risk likelihood.

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User reviews
by puppy, 2021-11-27

by kyle, 2020-01-23

Не работает на Android.
by shurygin2013, 2018-12-03
View all user reviews