Apps similar to Turn Off the Lights include Enhancer for YouTube, which is free. Other options are Unhook, Iridium by ParticleCore, Midnight Lizard and Night Eye. Dark Mode Enforcers like Turn Off the Lights are a crowded field, with more than 25 alternatives for Mac, iPhone, the web, iPad and Windows.
Enhancer for YouTube is a very lightweight extension that is highly customisable, easy to use, and that will greatly improve your YouTube experience!
France
EU
Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.
Iridium (former YouTube Plus) is an extension built to improve the user experience on the new YouTube Material layout. As of January of 2019, the development is discontinued. Firefox and Chrome Versions are out of date and you must manually sideload the addon.
United States
Midnight Lizard web-extension for Google Chrome™ and Mozilla Firefox™ provides custom color schemes for all websites.
Russia
Night Eye is a browser extension that enables dark mode on nearly any website. It does NOT simply invert the colors, but utilises a completely new approach that improves your browsing experience.
BulgariaEU
Noir is a Safari extension for iOS that automatically adds a dark mode to every website you visit.
SlovakiaEU
It is a universal night mode for the entire Internet. It uses a special algorithm to automatically change the colors of the websites you visit into dark mode so that you can browse without straining your eyes, especially at night.
This Safari extension offers dark mode browsing in Safari. Dark Night adds a beautiful theme to every page you visit.
Magic actions for YouTube is a wonderful enhancement to any video viewing experience.
United States
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.
TubeMod is a Browser Extension that allows users to hide specific YouTube elements, giving them more control over their viewing experience. Rather than permanently removing elements, TubeMod provides simple toggles to hide parts of YouTube’s UI, making it a lightweight and...
