Google Chrome up to 720p
Internet Explorer up to 1080p
Microsoft Edge up to 4K*
Mozilla Firefox up to 720p
Opera up to 720p
Safari up to 1080p on Mac OS X 10.10.3 or later
Mainly it has to do with PlayReady / Widevine support at the OS Level. Windows has PlayReady baked into the OS, and will communicate with the Edge Browser in a Secure way that can not be bypassed by any user on the System
Linux and other browsers on Windows lack the ability to do this at an OS Level there for netflix limits the stream quality because the OS does not have the proper DRM Controls
This is the exact same reason they do not want the Netlfix app on Rooted devices
Resolution:
Mainly it has to do with PlayReady / Widevine support at the OS Level. Windows has PlayReady baked into the OS, and will communicate with the Edge Browser in a Secure way that can not be bypassed by any user on the SystemLinux and other browsers on Windows lack the ability to do this at an OS Level there for netflix limits the stream quality because the OS does not have the proper DRM Controls
This is the exact same reason they do not want the Netlfix app on Rooted devices