Dark Reader

While it has been one of my most used extensions, it does have it's own share of problems.

Dynamic Stylesheet Inversion

What it does, is generates a more suitable dark theme for the site. Sounds good? There's few catches.

• It is CPU-intensive.
• There is no sort of cache, which means EVERY time you navigate to a new url and back, it will regenerate the style. It would extremely help to have some sort of configurable cache, especially for highly frequented URLs (time-restricted entries. If they go beyond, they are deleted and regenerated).

Custom Browser Theme

Changes the UI tone and color to a different "dark", however impacts Firefox start-up noticeably.

Other Annoyances

The extension shows itself. So. Freaking. Slow. Most times, it is more viable to just try opening it again, until it decides to respond.

It's very customizable, and it's open source.

I sincerely recommend it!

It's becomes better over the version.

The best extension for browsing the web in dark mode.

After a month of use, I haven't felt the need to ever turn it off. The only website I've ever thought looked ugly was Headspace.com. Sometimes on Google Sheets it slows down the use of a table, (I'm suspicious it's adding a second or two of loading time, because it takes a second until the colors change), but otherwise is pretty perfect and definitely worth an install.

While it's good, it has a very high impact on CPU (due to dynamic CSS generation, as opposed to "filter:invert(1);").