Watch the video:
Timestamps:
0:00 - Explanation
0:11 - Netflix Error F7701-1003
0:34 - Reboot
0:41 - Updating Firefox
1:05 - Enabling DRM controlled content
1:49 - Clearing cookies
2:06 - Use another browser
Seeing Error F7701-1003 or “You must enable DRM to play some audio or video on this page”? Well, this is a DRM issue with Firefox. This video shows you some solutions to get Netflix to work properly again. By the end, you should be able to watch your favourite shows and movies again.
Clear cookies on Netflix: https://www.netflix.com/clearcookies