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.

非常好，手机和pc都可以用，提高性能是目标和期待

Muy bonito, facebook y google noticias mas fácil de leer. :)

this will help my eyes hurt less while working