Note that unless you're running Windows or Mac, 4k from Netflix is not available anyway. In fact, 1080p would not be available, according to their system requirements. Linux tops out at 720p on both Chrome and Firefox. I have to assume this would extend to Kodi on whatever platform you're running Kodi on.
Meanwhile torrents are a search away and they give me a no-nonsense .mkv file in 5 minutes, to watch wherever and whenever I want: phone, PC, TV, internet or no internet. The choice is easy.
Not sure about this. Firefox and Opera both support 720p.
But, because of their choices here - or the terms of the content deals they've signed, idk - Netflix doesn't get as much money from me as they could. 720p is not sufficiently better than 480p (to me) to warrant paying them for 'standard' service, let alone their premium tier at $20/mo. So I just get their basic service.
Their loss, really, although collectively the Linux customer base is probably tiny enough that it's inconsequential to them.
Don't you have to enable widevine to get Netflix in Firefox?