Google says the “Expanded” dark mode is intended to improve accessibility, but you may experience appearance issues when using it as some apps won’t play nicely with it. If that happens, then it’s recommended you enable the “Standard” dark mode instead, as it won’t force a dark theme on apps that don’t support it.

An actually useful feature in a new Android release!

Maybe then finally Firefox will start behaving! So sick of being flash banged because Firefox didn’t get the memo about the switch to dark mode according to the system schedule.