When using YouTube, I prefer the "dark theme". I log in to Google,
and select it for YouTube under the options. It works okay in my
current session, but when I reopen YouTube after closing it, it reverts
to the standard white them. Which means I have to select the dark
theme again. While it's not the end of the world, it's still a pain in
the arse to have to do this every time I open YouTube.
It seems to have started happening with the last three updates of
Firefox, to the current version 104.0.2 (64-bit) which I'm now using.
I'm running Windows 10 Pro 64-bit on a Lenovo ThinkCentre AIO.
—Any/all thoughts appreciated.