Just testing tons of dark mode type addons today to honestly just try to fix one single annoyance on one single site that has issues with a small on site popup that shows recent notifications. I have to admit that I don't really like messing with extra stuff if I don't have to either. However, this addon has fixed my annoying problem and worked well so far on a few quick test sites right out of the 'box'. I do have to say that I notice a whee slow down as people have mentioned about, but it's minimal (to me). So far this has been the first addon though to do all things dark just right where I need that, and also actually makes it super easy to whitelist/blacklist sites with a click. I'm still going to go searching for more tests with more addons, but so far this one gets everything right pretty much from my tests for this current version.

A great addon i've been using for ages now, but recently after turning it on/off for any website it'll throw up 'Midnight Lizard
Settings application failed. Refresh the page and try again.
QuotaExceededError: storage.sync API call exceeded its quota limitations' with no guide on what this is or how to fix. I removed all site settings to start fresh but still no ball.

Does the job well, but can massively slow down the browser.

Generally works well. Of course, there are cases when it hangs or makes a page unintelligible (for example, yandex.ru/search/?text=asdf shows a blank window). Fortunately there is an option to not apply to specific sites. Also the feature to resize/move the extension window is badly needed, to enjoy WYSIWYG effect). The manual would be handy.

The whole extension gives me a really good feel, with a lot of filters that have been configured by default, but there are performance issues on some sites. When I open https://www.acfun.cn/u/13400653.

诶，cpu带不动，太卡了

the best extension for coloring webpages with many customiziations,but slows down a little bit my computer.

not very much