For anyone who wants to watch Netflix with a better experience, you can get this simple extension that removes closed captions. It can remove CCs from closed captions (CCs), Hearing Impaired (HI) Subtitles, which means subtitles that are shown for hearing impaired people. This is a very simple extension, and it doesn't have any options to configure, all you need is to install it and open your Netflix account.

You can remove subtitles on a video or remove closed captions from a video or a movie. 

This extension is not affiliated with Netflix and does not work in any way with Netflix. It is an independent small extension.