However, when the Mozilla location service shut down earlier this year the geo-location capabilities powering Redshift (which allowed the feature to automatically start at sunset for a user’s location) stopped working.

… it takes latitude and longitude. Why the fuck was it using remote services for that? Isn’t the formula, like, three sine waves?

Whatever. Hopefully native integration allows a feature missing from both Redshift and f.lux: a cutout for viewing true color. I’ve done art late into the night, and a fullscreen on/off to check something is like a flashbang.