I have added still more updated to my Chrome extension.
*Added episode counter in addition to timer
*Pausing video stops timer
*Fixed bugs when stopping
*Play/Pause, Next and Stop media buttons on keyboard now work with Netflix.
*ctrl+q now causes the same action as the sleep timer ending (ex: pause movie & sleep).
Chrome store link: https://chrome.google.com/webstore/detail/netflix-autoplayer-with-s/adegickccmlojbmbmemgjakpoammfmkg?utm_source=chrome-ntp-icon
Github link: https://github.com/rtpmatt/Netflix-Autoplay-Chrome-Extension