For what it may be worth, I use ClearDarkSky a great deal, and as of today, 16 June 2025, the following rather odd behavior has persisted for several days:
On Safari, running on four different Apple platforms (two Macs, one iPhone, one iPad), the display updates normally.
On FireFox, running on the *same* two Macs, the display has not updated past 11 June, 2025. I have cleared caches and cookies, and restarted both of these Macs. They happen to used different processors (Intel versus Apple silicon M3) and different versions of macOS.
I am happy ClearDarkSky on Safari, but I hope that reporting the issue in this thread may be useful to someone.
Clear sky ...