[enragedcacti]

AFAICT, Browsix is meant to work more like Wine than like jslinux. The goal is to allow devs to deploy native executables to the web browser more seamlessly because it provides ways for standard javascript to interact with the program. JSLinux is a full system emulator and thus has more overhead and doesn't have a method to cleanly interact with the world outside of the emulator.

The latex editor example is the one that best demonstrates the concept. It is a standard JS frontend that is invoking an unmodified pdflatex for rendering. In all other 'OS in the Browser' projects I'm aware of it would have to be a desktop application that just happens to be getting rendered in the browser. With plain emscripten or webassembly you would need to modify pdflatex to support a method to accept jobs and return results while not relying on any OS level features.