Since I have Amazon Prime anyway I tried looking for new stuff on Amazon Music and found it really unhelpful. I don't know what I was doing wrong or if Amazon Music is just bad. In another thread I saw that
@Bobby Bass got some Emerson, Lake and Palmer stuff. I know nothing about them so but since Bobby seems to like a lot of the stuff I like I thought it was worth looking into so I tried playing Amazon Music through BluOS on my main stereo. That worked fine except that when I chose in Amazon Music to listen to ELP it just mixed in some YES and some Moody Blues and who knows what else. Maybe I don't have a clue how to play a specific band on Amazon Music. But that was a very unhelpful effort.
I could try Youtube. In the past I listened to stuff there. But I've decided that I want to listen though my stereo instead of my computer speakers. So I just ordered a 25 foot 3.5'' to RCA wire so that I can directly plug my computer into my preamp Line-In. I am looking forward seeing if that works for playing music from Firefox to the NAD that way. The NAD will play wirelessly though BluOS, Airplay and Bluetooth. But I thought a wired solution might be easiest.
At this stage I'm not interested in paid subscriptions.