Originally Posted by pholy
I don't have a new Kobo reader, so I can't check this, but it may be that the kepub renderer uses webkit, but I'm pretty sure any renderer that understands Adobe DRM has to be using the Adobe renderer. That's what I was told a couple of years ago.
IIRC that's correct. They use WebKit for kePub and the RMSDK for ePub (or at least DRM'd ePub's if not all).