I gave it an honest shot for 2 weeks, but I've gone back to Chrome now. Not having an actual dark mode is just too much of an inconvenience that I don't want to use the browser. A shame, because I like the music features and built-in WhatsApp/Messenger, but not enough to be looking at white all the time.

@xanaddams exactly what I was looking for as well.

I enjoy using Opera Air during the day on my work computer, but at night when everything is dark, I really just want everything to be in dark mode. It's not take take away from feeling positive and optimistic, it's about feeling cozy and "off the job".