I've been using nighteye for a few days now. Apart from being slow, it's one of the better dark mode extensions. However I encountered multiple pages that do not work with nighteye. For example a train plan information page refuses to give any information. On several pages scrolling stopped working. Finally there is no issue tracker so I just leave the issues I have her.

It's not a free add-on

Not working on addons.mozilla.org

This is good addon even though it's only free for 5 websites, still that's more than enough for me, it's not like dark reader addon which interfere with dark themes from firefox itself.

But it seems that you can't edit the 5 lists of sites, i try to find it in settings but can't find it

It seems buggy, i can't seems to access the settings in the addons

Looks best when compared to competitors. Paid subscription is ok. Slows down page load and occasionally breaks all web sites from being loaded. I hope it gets fixed. Such occasional total breakdown and slowness is suspicious. Is it really totally local and does not depend on communicating with central server for some reason ?

I am a big fan of the concept! Some sites look wonderful. Yet, the extra overload is not worth it and some images and buttons disappear.

Does apply night mode to websites well but loading times are hit pretty hard. If the developer can optimize that, it would make for a great extension. If not, not worth the load delays.