Turn Off the Lights for Firefox per Stefan vd

With a single click on the lamp button, the page will fade to dark. And automatically focus on the video. By clicking on it again, the page will return to normal.

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™, Microsoft Edge™, Maxthon™ and Yandex™ web browsers.

A few great features in this browser extension:
+ Turn the lights back on, by clicking on the black layer
+ Supports multiple video sites: YouTube™, HTML5 video,... and more
+ Customise your YouTube™:
Auto HD: Set videos to play in HD automatically. Users can select from highres 8K > 5K> 4K > 1080p > 720p > 480p > 360p > 240p > 144p > default
Auto Wide: Automatically plays the videos on the widest mode
,... and more
+ Easter Eggs:
Shortcut key: T -> Do you like a real movie theatre feeling?
+ Option to make the screen dark when the user clicks on the play button
+ Option to turn on/off the fade in and fade out effects
+ Custom colors
+ Option for Flash Detection
+ Option to Show Dimness Level Bar
+ Option for Eye Protection for when it's night, with whitelist/blacklist filter
+ Option for atmosphere lighting that shows a glow around the video player
+ Option to show the dark layer on the top of the window
+ Option for shortcut keys:
Ctrl + Shift + L to toggle the lights
Alt + F8 to restore the default opacity value
Alt + F9 to save the current opacity value
Alt + F10 to enable/disable the Eye Protection feature
Alt + (arrow up) to increase the opacity
Alt + (arrow down) to decrease the opacity
Alt + * to toggle the lights on all open tabs
+ Option for Camera Motion
+ Option for Speech Recognition
+ Option for Mouse Wheel Volume Control for each HTML5 video player
+ Option to add a filter to the current HTML5 video player (grayscale, sepia, invert, contrast, saturate, hue rotation and brightness)
+ Option to show the Audio Visualisation effect on top of the current HTML5 video (Blocks, Frequency and Music Tunnel)
+ Option to loop the current HTML5 video player
+ Option to place the Night Mode switch to toggle YouTube™ in black or white theme, with whitelist/blacklist filter
Timestamp: Activate the Night Mode within the chosen time
Blackout: Dims the web page and activates the Night Mode
+ Option to stop YouTube™ and HTML5 videos from automatically playing.
+ and more...

Do not forget to like & Follow Us:
Facebook
https://www.facebook.com/turnoffthelight
Twitter
https://twitter.com/TurnOfftheLight
Pinterest
https://www.pinterest.com/turnoffthelight
Instagram
https://www.instagram.com/turnoffthelights
YouTube
https://www.youtube.com/@turnoffthelights
Twitch
https://www.twitch.tv/TurnOfftheLights

Feel free to contact us if there is any problem or suggestion.
Note: YouTube is a trademark of Google Inc. Use of this trademark is subject to Google Permissions.

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Please don't use reviews as a support forum. If you are experiencing problems with the add-on, send a support request:
https://www.turnoffthelights.com/support/
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Turn Off the Lights is Open-Source and all your feedback, ideas and improvement are welcome:
https://github.com/turnoffthelights
You can dark reader everything on the web. You choose your personal opacity value and dark layer color.
Turn Off the Lights works great with all the other adblocker enabled such as Adblock, Adblock Plus, uBlock Origin, Adguard, SponsorBlock, and AdBlock for YouTube™.

Also available as a Chrome extension:
https://chrome.google.com/webstore/detail/turn-off-the-lights/bfbmjmiodbnnpllbbbfblcplfjjepjdn