> But Julian's essay is talking about nonfree or proprietary JavaScript code
First of all, that's just wrong. Julian is explicitly talking about all javascript out there, free as well as non-free. Librejs aims to wipe out non-free javascript, but that's not enough to his eyes.
If i understood correctly, one of his main problems with javascript is that those 'programs' get silently 'installed and executed' from various untrusted sources. But those sandboxed scripts can't really do much so this sounds more dramatical than it actually is. That's my whole point.
