Does not slow down anything. Does not spy. Is open source. Works flawless. Helps a lot, especially at evening/night. Of course 5-stars!

Thank you for designing a simple and effective extension to control universal styles. This extension is a huge time-saver. Thank you again!

It looks great but it slows my firefox browser down constantly so its unworkable. Any alternatives out there without taking my browser back to the speed of the 90's?

best night mode and i even use it all time

Perfeita, altamente recomendado. Mudou a forma de usufruir como navego para melhor.

even having 5 add blockers, grease monkey and privacy badger running all at once doesnt slow my browser down like this shitty addon. 5 tabs open incl facebook and it's like i'm on a macbook from the stone age while it's a new 2017 macbook pro.

It looked better than some dark theme addons but it slowed my Firefox program down way too much on any website. I have a beast computer. i7 5820k, 2080ti, 32gb ram.