I finally had Netflix play at higher resolutions with a native elementary OS browser (specifically Firefox). I am using an updated version of the Netflix 1080p add-on in Firefox and it works flawlessly in my computer (Netflix 1080p).
However, I want to see further details of the streaming quality during playback. With Windows (either through their UWP app or browsers), I can easily do this by pressing (Ctrl + Alt + Shift + D) during playback. However, this does not work with any browsers I have in elementary OS. Is there an equivalent combination for Elementary OS for the said shortcut using the Super key?