I'm looking for an extension for Mozilla Firefox that functions just like Dark Reader for Google Chrome.

[Dark Reader] uses special intellectual way to transform bright blinding stuff into eye relaxing, high contrast, deluminated, dark themed and just smart looking web-pages which are easy to read at night

5 Answers 5


You may also want to try Owl, a light add-on built specifically for this purpose, and very much Dark Reader for Chrome.

(Disclaimer: I also happen to be the developer of this [and other] add-ons)

  • Works great on some sites... doesn't work so well with others (e.g., on my computer, this page is a solid blank gray screen when Owl is activated).
    – dat
    Commented May 6, 2016 at 4:47
  • @dat you may want to try the Classic theme from the dropdown panel, it works on sites where the other theme doesn't. Thanks for using Owl :)
    – CptFoobar
    Commented Jun 10, 2016 at 9:29

You could use Stylish (FF) --- Chrome and install user styles built for darkness. I'm personally using a few 'skins' on Firefox and Pale Moon. Some sites are a bit buggy and require you to exclude sites from time to time.


I'm using Black Web and High Contrast and they work on every site I go to. You can even reskin browsers too.


You can install Dark Reader for Firefox. It makes exact the same dark themes as Dark Reader for Chrome.

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Two extension pops up when searching and those are the extensions:

  • Blank your monitor easy readin - Blank Your Monitor provide a simple mechanism to change Firefox color combination in order to invert the usage of white and black colors
  • Dark backgrounds switcher - Easily switch the color of foreground (text) to yellow/white and background to black. The plugin offers three modes: yellow on black, white on black and back to page's defaults. (Might be discontinued)

When I first read your posting, another program however came into my mind, and that is the f.lux which changes the color of your computer according to time of day, reducing amongst other the blue intensity. Lifehacker has a more extensive article on similar topix of How to Invert Your Browser Colors for Easier Reading at Night.

  • 2
    Did you use some of these extensions? If so, what are your experiences? Commented Jun 30, 2015 at 10:35
  • 1
    @AngeloFuchs I haven't used them, but have seen them recommended. I'm contemplating on installing the f.lux software as I want to use computer/tables late at night, but also want to avoid disturbing the sleep process, if possible.
    – holroy
    Commented Jun 30, 2015 at 10:37
  • Thank you for those suggestions. I just tried both extensions and unfortunately they do not work nearly as well as Dark Reader does for Google Chrome. I have asked the developer of Dark Reader if he has any plans to develop the same extension for Mozilla Firefox. I will simply have to use Chrome for reading and Firefox for all other uses. Also, I would love to upvote @holroy's answer, but I need two more points. Commented Jun 30, 2015 at 13:41

i found screen dimmer addon for firefox .

  • This acts just like "deluminate" for chrome.
  • You can access settings in right click menu.

Description: Darken any web page to reduce eye strain and increase comfort


  • Change overlay color
  • Increase, decrease or reset overlay with right mouse click or keyboard controls

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