The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube and Beyond. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.
- By:
- Stefan vd
- Daily users:
- 46,396+ 286
- Rating:
- 4.57 (685)
- Version:
- 4.5.7 Last updated: 2025-02-20
- Version code:
- 5889736
- Creation date:
- 2010-11-17
- Risk:
- Very high risk impact Moderate risk likelihood
- Permissions:
- contextMenus
- tabs
- storage
- webNavigation
- scripting
- theme
- contextMenus
- Host permissions:
- <all_urls>
- <all_urls>
- Size:
- 8.86M
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Browser Add-ons
- Updated:
- a day ago
Ranking
# 332 ▼ 2
Other platforms
User reviews
Pros
- Helpful and effective at dimming the screen for video watching
- Developer is responsive and provides fixes quickly
- Simple and user-friendly design
- Useful for gamepad support
Cons
- Causes extremely high memory usage leading to browser crashes
- Extension sometimes stops working after Firefox updates
- Options/settings page causes browser lockups or freezes
- Interferes with YouTube search suggestions by displaying a grey bar
- Lack of an auto activation feature limits usability
Recent reviews
Extension attempts to use ALL of your available memory, no matter how much you have!
My browser memory usage is usually under 1 GB, even with a hundred active tabs. But adding this extension made both Firefox and Waterfox crash horribly, with a reported memory usage of 59 GB! (My system has 64 GB, which explains the crash, when the usage had reached the maximum.)
I had to open the Task Manager to force close the browser. There is a very small time window of about 10 seconds when you first open the browser where everything is working. But then the memory usage quickly climbs, causing the freeze.
I was able to take advantage of that small window to quickly remove the extension, and now everything is back to normal.
I tested the extension by disabling all other extensions, except this one. I also tried it on 3 other computers with different configurations.
This is crazy! How can such a popular extension have such a massive memory problem? More like a memory black hole!
I wanted this extension simply for the gamepad support. But definitely going for something else now.
by AlconburyBlues, 2025-05-06
by Ashley, 2025-04-24
by Andreas, 2025-04-14
Extension safety
Risk impact
Turn Off the Lights for Firefox requires a lot of sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood
Turn Off the Lights for Firefox is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Risk likelihood analysis details
- Medium This extension was updated in the past 3 months. New updates may not be stable or safe.
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Upgrade to see full risk analysis details
Compare add-ons
- Compare Turn Off the Lights for Firefox vs Turn Off the Lights theme (Promo Store)
- Compare Turn Off the Lights for Firefox vs Dark Mode
- Compare Turn Off the Lights for Firefox vs Dark Mode For Firefox
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