Powerful YouTube extension for FREE

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-Lifehacker "The 'Turn Off the Lights' Extension Can Do Much More Than Darken Your Browser"

Mouse volume Scroll Scroll up or down your mousewheel to adjust live the audio

Atmosphere Lighting Glow effect on all your playing HTML5 videos

Night Mode Get all website a darker skin. That is comfortable for your eyes when browing or reading a web page in the night

Cinema Mode for all HTML5 VIDEOS

THE BEST Browser Extension Get it Now! Available for all web browsers that include Google Chrome, Firefox, Opera, Safari, and Microsoft Edge.