Works like a charm. Perfect design UX wise. I would also adda a keyboard shortcut too (idk if it has one). Also please do it for chrome.

Useless

Somehow, this extension degraded contrast on multiple websites when the high contrast switch was turned OFF.
See https://daverupert.com/about/ for example

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. :)

Switches ALL TABS to high contrast. This makes it not very useful IMO, since it would make more sense to just switch to high contrast in settings.

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.