I tried both "Dark Reader" and "Dark Mode-Night Reader" and this beats them hands down.

So far it has worked in all pages, including those where the above ones do not. Also, the contrast is very good, contrary to the "Dark Mode .." one where I needed to reset it 99% of the time.

Thank You very much. I am certainly going to make a small crypto-donation!

Literally just what I wanted!

Realy like this, works well and good customization

It works seamlessly on all websites I have visited (except the Mozilla add-ons page).

It's way better and lighter than that Dark Reader that's always on the top 10 list,just updates are not frequent.

Better than Dark Reader imo. You have choice of setting websites to default, stylesheet processor, invert, disabled, or simple CSS. The stylesheet processor is why I like this over Dark Reader; it's smarter than just a filter over the screen.

Util para la vista

Great!
Easily using!

Make long periods in front of a screen much easier on he eyes. Works on most sites and is easy to stop or alter if need be.