Most recent update 23Sep2021 not working properly.
Remove and reinstall. Now is working perfect👍Thank U 😎

感覺很好用!~也用習慣了!

A recent update caused the extension to not load for me, but it was fixed in a very timely manner.

Saving my eyes daily! Love it!

I use Win7, Firefox 56.0.2 64 bits (please don't ask why). I must say that I use Dark reader for a long time and was quite happy (5 stars) until Version 4.9.35.

The (latest) version (4.9.37.1) does not work either on Win7+Firefox 56.0.2 64 bits (sorry I need this config). It displays "loading in progress ..." (or something like that) and that's it.

Uninstalled and replaced by the previous version (4.9.34) (thanks to https://addons.mozilla.org/fr/firefox/addon/darkreader/versions/) works. Except that on the next load the automatic extensions update replaces it by the (last ) version. For now I have removed the automatic extensions update, not a big deal, rare are the extensions that update w/ my config ;)

All works properly now \o/ I just stopped to upgrade above 4.9.34.

Really nice extension and has worked just fine until the latest update. For some reason Alt+Shift+A and Alt+Shift+D do not toggle the extension any more. I assume this is a temporary glitch and that it will probably be sorted out soon, but I'm leaving this message here so that others who experience the same thing will know that it's not just their machine and that it appears to be universal.