Owing to a constant hiss I’ve had in the analog audio channel in the last two versions of OSMC on RPi2, I wound up installing Raspbian (GUI) and Kodi17. This removed this hiss, yipee.
The Raspbian GUI includes the Chrome browser, which is able to run Netflix.
It would be nice to have a link in OSMC to launch Chrome for the purpose of playing NetFlix or YouTube, etc, and then come back to OSMC for what it’s good out.
There is a significant difference between raspbian and OSMC which would not make possible what you ask for but you might want to check out this solution