Just downloaded this about 5mins ago & it appears to solve all my immediate problems - gotta say; I love it!

Update:
6th Dec '19 ~ Experiencing some issues with Firefox 71.0

Update:
24th Apr '20 ~ This App doesn't play well with Gmail & for sometime now ~ I hope you are aware of such?

Update:
25thMay'20 ~ 👍Still slow with Gmail but one can change one's settings to be specific to individual sites & that workaround works.

Not perfect, but has some nice options for how to display pages in the extension window. Would be even better if you could choose a high contrast icon to go in the toolbar because if you have a dark theme in your browser then all you see is the red glasses when dark mode is on.

excelente

This is my favorite Dark Mode Add-on for Firefox and Firefox for Android. It works fine and every website looks wonderful.

- Automatically Enable/Disable dark theme, according to change in Windows theme (and Firefox theme accordingly).
- Bug: Dark Reader doesn't work when "Reader View" is enabled for a website.
- Dark Reader doesn't work in mozilla.org pages.

Excellent

thanku so much