I feel this is a good solution for a challenging problem. Unfortunately the colour balance for several key sites are going to require more tweak-time than I have right now.

For example, folks with better eye-sight than I, may not notice that "dark mode" usually needs the font size bumped on point. There was subtle structural stuff missing on gmail and facebook just due to colour choices, etc. 'General composition and layout' rules cast white space in the role of "framing". When that is removed, something extra is needed to maintain the relationships and flow hints from a UX perspective.

The thing that really decided it for me as shadow text is not at all handled well. Lots of stuff was so fuzzed that I couldn't read it. As I say, put aside time to TWEAK your favourite sites.

I love the plugin. At this time, I can't really realise the benefits.