There is absolutely no way I would be able to convince my parents to do streaming that way, and I'm reasonably certain that they're a much more representative set of the community than people who hang around HN.
You absolutely would and it's the default way that normal people actually do it, which is to isolate Netflix into some kind of TV or HDMI stick instead of putting it in a browser on a PC.
Sure, when they are at home. They use laptops to watch Netflix when they travel, and I am quite confident that if Netflix didn't work on Firefox they would assume it is broken and then switch to Chrome.
