If you experience the error code F7702-1003-8053000B on your computer, it's typically caused by an outdated Firefox component. Follow the troubleshooting steps below to resolve the issue.
Click on the Menu button in Firefox.
Uncheck the box labeled Play DRM Content.
Wait 15 seconds, then recheck Play DRM Content.
Once rechecked, select Menu.
Wait until the section labeled Primetime Content Decryption Module... stops displaying the will be installed shortly text.
Restart Firefox and try Netflix again.