Please carefully read the instructions at https://goo.gl/8Mm6Qm
Open Source Browser extension - Dim the web page and highlight the video player.
Turn Off the Lights is a lightweight and useful add-in designed for a more comfortable watching experience. It works for all known video sites such as YouTube, Vimeo, Dailymotion, Hulu, Metacafe, YouKu etc. Not only this but these extensions are compatible with Google Chrome, Apple Safari, Mozilla Firefox, Opera, Internet Explorer, Maxthon, Yandex web browsers and Microsoft Edge.
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Google Chrome, Safari, Firefox, Opera, Internet Explorer, Yandex, Maxthon, Microsoft Edge.
Windows Store, Windows Phone, Android and iOS.