Really helpful and well managed extension which considers a lot of things. I would like to address 2 issues:
1) In pages where we have .svg files (mostly with black text written on them), the black background makes it really difficult to read the text. For eg. https://www.geeksforgeeks.org/page-rank-algorithm-implementation/
2) Some rendered elements of a page don't seem 'clickable' until the entire page is loaded, this gives a sense of latency of 2-3 seconds. Problem primarily faced on facebook.com ( especially on loading it for the first time of a session)

It's nice, but it removes all my themes. I thought it was just a reader, right?
But dude, my regular default is gone.

Probably the best but makes firefox load pages about 2-3 seconds slower:/

saves my eyes from straining, thank you very much :-*

Absolute hands down the best add-on to night-mode-ify the web.
BUT
It renders Firefox unbelievably slow.

Slows down FF dramatically. Also, the new tab window is still burning-the-eyes white.

This is the first add-on I have found that makes Facebook dark WITHOUT ruining other elements of it. It looks naturally dark as the website intended it.