Очень нравился DR до момента, пока начал замедлять открытие страниц (а возможно и вообще их функционал) - об этом всплывает оповещение в браузере.

Using Firefox 71.0 64-bit. It is either on all the way, or off. When I loaded my location for the sunset setting, it did nothing. Always on day and night.

I finally decided to uninstall it when everything slowed down to a crawl and started breaking. Never had this happen before I installed it.

I guess that I'll just stick with f.lux instead.