The desktop web-app reader is interesting in that it's a DRM-free legal way to access otherwise DRM-encumbered e-books. Last I checked the EME DRM browser sandbox was still not required.
Personally I'm fine with this compromise solution. I've read whole books in the Kindle desktop web interface. The usual line is that it's somehow bad on the eyes, but I figure that I already spend my days reading documents and articles on a screen and it's irrational to imagine a "book" is somehow fundamentally different.
Is it really drm free if you can't save the books? Maybe there's technically no encryption but it's not like you're free to do with the book as you please either.
There is no EME DRM, but they actually go through some means to prevent the user from downloading the ebooks. That includes anti-devtools mitigations and storing much of the ebook contents encrypted in the cloud.
Yes yes I understand. My point is that I personally find it easy to read text in a desktop web browser, and this is the unique way of consuming rights-encumbered content without needing to install black-box spyware.
It doesn't use EME (EME isn't designed to protect text so it couldn't), but it's very likely what it does would be considered to be a "technical protection measure" in most courts and reverse engineering it is probably illegal in most territories.
Personally I'm fine with this compromise solution. I've read whole books in the Kindle desktop web interface. The usual line is that it's somehow bad on the eyes, but I figure that I already spend my days reading documents and articles on a screen and it's irrational to imagine a "book" is somehow fundamentally different.