Ambient Aurea!

YouTube Plus is a free add-on for the Firefox and Google Chrome web browser that provides you with dozens of configuration options to improve your YouTube experience.

Magic actions for YouTube is a wonderful enhancement to any video viewing experience.

The ambient light player for your favorite web browser ! Ambivid is a lightweight plugin that creates light effects around Youtube's HTML5 video player that correspond to the video content, resulting in a more immerse experience.It's easy to use and it's free, you definitely should give it a try !

Enhancer for YouTube is a very lightweight extension that is highly customisable, easy to use, and that will greatly improve your YouTube experience!

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Warning: YouTube Enhancer Plus does not support the Material Design version of YouTube, and since Mozilla has planned to disable XUL add-ons like this one when Firefox 57 will be released (source) I have decided to stop its development, so I highly recommend you to use Enhancer for YouTube™ instead.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!