Logos is a Gno object browser. The modern browser as well as the modern javascript ecosystem is from a security point of view, completely fucked. The entire paradigm of continuously updating browsers with incrementally added features is a security nightmare.
The Logos browser is based on a new model that is vastly simpler than HTML. The purpose of Logos is to become a fully expressive web API and implementation standard that does most of what HTML and the World Wide Web originally intended to do, but without becoming more complex than necessary.