good

A dark mode would improve it's usability significantly.

don't work with dark themes(it has white background)

Awesome concept, works pretty well although it's a bit clunky when you turn off a stylesheet it reloads the whole tab not just the compatibility section. Also there's no dark theme icon!

its great.

Nice! Would be cool too have some filters (e.g with checkbox) for views. E.g. filter browser view to only show versions with compatibility problems, filter css view to only show rules with problems. Would be easier to quickly browse through problems.

This is so great that I can easily see on which browser my website will works fine.

5 stars is few for this plug-in

It really helps to find out what polyfills needed when using modern css/javascript.