It is the best of this kind. The default works on almost any website. For the very few that are not readable, it is very easy to change the method used to color the page.

Works very well with most websites, the ability to disable or change the method on each website makes it perfect. Now all websites can match the color of my soul.

Unfortunately, Firefox won't let me download this onto my phone anymore. Firefox claims I need a newer version of Firefox, but I have the newest version of Firefox. Furthermore, the link that goes to the "newer version" goes to the version I have. I know this isn't your fault. It's Mozilla's fault, but I thought you should be informed about the problem. So far, this is the only add-on I can't install. :(

On a side note: I still can't believe add-ons like this are still necessary, especially now that we have devices with AMOLED displays.

Excellet! Very easy to use!

I love this extension so much. Simple, easy to use, customizable, and works on mobile too!

Extraordinary! Anyone that is struggling with what must be by now the largest problem affecting the internet-age people: light from the monitor tormenting your overused eyes, must use this add-on. Brightness will stop being your worst enemy.
It is simple to use and a relief to the eyes.
Best of all, it almost never brakes a sites' redability obscuring elements of the webpage, like many other colour or style changing options do. At this moment the very best of what is in offer for this specific purpose.
:)

I love it. Only problem is annoying white lines in some webpages. I am using stylesheet proccesor with Firefox 57+. (I do not know maybe because it is new on firefox57).

Works well (using in Firefox for Android and Desktop).

I see in the patch notes you're working on the white flashes, so just wanted to say thanks for your speedy updates so far and good luck taming this wild ff57 update.

Best and favorite addon by far.

And for all of you saying it doesn't change the homepage, read the patch notes, you freaking dummies! FIREFOX disabled ALL ADDONS on those pages.

THE SOLUTION (for now at least):
INSTALL THIS ADDON: https://addons.mozilla.org/en-US/firefox/addon/new-tab-override/
USE THE ADDON TO POINT TO A NEW CUSTOM HOMEPAGE FROM HERE: https://www.myfav.es/

FIXED.

Love how easy it is to use and tweak to your liking, by far the best of its kind.