If you know how let me know. There used to be an addon that mimic'd a header it ...

If you know how let me know. There used to be an addon that mimic'd a header it was looking for but I think netflix fixed that loophole. Im not sure if there is a way to verify the info during playback anymore?

EDIT - From their website (https://help.netflix.com/en/node/23931):

Resolution Windows computers support streaming in the following browser resolutions:

    Google Chrome up to 720p

    Internet Explorer up to 1080p

    Microsoft Edge up to 4K*

    Mozilla Firefox up to 720p

    Opera up to 720p

    Windows 8 app up to 1080p

    Windows 10 app up to 4K*