It looks good

Simpler Dark Reader, less buggy, worthy addition as a catchall for when Dark Reader extension fails on a site or randomly has bugs.

killed my browser and made some websites unreadable

Very sick. Thought it might not work on an obscure website which nobody else uses but I realized all it does is turn the page negative. Don't let that turn you away, there are also themes you can use to change the look (since sometimes negative looks bad). Useful for nighttime when my poor eyes are suffering from google docs' theme and I need to get a project done lol

cool conversion for dark themes

Works perfectly thank you. In fact it works on sites that the rival Dark Reader does not.

it works but not well; it inverts colours so when pages are already dark it turns them white, or when sections of a page are dark and other sections are light it flips them, and it inverts other colours too so it makes blue yellow

makes google docs completely black and unreadable

4/5, the developer should add the source to github to have bug tracking and issues.
Update exclude list to handle reddit & github dark modes: ..., theme=2, preferred_color_mode=dark

This addon does it; global nice dark mode not that crap ; brightness overlay shit... !

Well Done Developer; lets hope mozilla hires you.

why does it not working?!

Not bad, but needs some work.

The on/off switch is global which is not ideal, it should be site-based.
Editing the Include/exclude list is too much work, it should be done automatically via the main switch.

The settings are available from the 3-dot menu next to the addon toggle in the Addon page (Cmd+Shift+A). They're not straight forward though.

The Dark styles should be more easily accessible from the main addon button, and they should be editable.

"Dark mode simple 1" seems to work better than the default mode but if only there was a way to edit the background color to 10% brightness (dark grey).

Hopeully it will get better.
Cheers!

Switch on each time on each site separately or make it automatic and then see awful invert of already dark by default pages. Not handy.