I just use Firefox on Ubuntu and it seems fine? Doesn't seem SD. Maybe I'm missing something -- is there a way to check?
The thing I notice is more the frame rate than the resolution. The resolution looks HD to me -- I can tell the difference with offline videos.
Hm I suppose it is possible I am getting some degraded quality from Netflix. I always thought it was because of the old PC and/or their bad encoding quality.
I mainly watch non-demanding video on Netflix, like a cooking show or standup comedy ... YouTube is definitely HD for me.
https://android.gadgethacks.com/how-to/netflix-caps-video-qu...