I couldn't use FF for many years due to the lack of this amazing extension. 🚀🚀🚀

Works well. great when you're sometimes working in bright sun.

Works great, toggle high contrast setting. Allow it to remember settings for a site would be a great addition.

This is so much easier than having to change settings on PC. All I needed was to be able to change a page from all black with white font to white with black font. This is perfect and I do not have to reset anything. :)

Fantastic!
Please add a customizable keyboard shortcut option, so anyone can bind this to every button they like

Simple High Contrast mode switcher. Perfect for e-ink devices like the Pinenote I'm writing this review on. Light on resources compared to CSS modifying addons. Open-source, code available on github.