Really well-designed extension. As a developer who is building an extension, this level of usefulness and polish is what I aspire to.

A couple of small quibbles... it doesn't work on Google Maps--causes the site to seize up, probably because it is converting all the colors... also doesn't work very well on certain other sites; for example, if you are trying to view some color-coded information on wikipedia (https://en.wikipedia.org/wiki/Lewis_Hamilton#Complete_Formula_One_results) the colors don't translate so well... silver and grey are almost the same color. Sites that have their own built-in dark mode also render a bit screwy; ex: https://material-ui.com/api/modal/ . The built-in dark mode for most websites is better than the Dark Reader version for that site, which is to be expected.

But these are all really small quibbles... overall the app works really well, it's a joy to use, the ui is crisp and fresh. Really nice extension.