A browser for the HTML5 era (entirely written in javascript)

Was all good until you mentioned Chromium... Can you really back the claim that it's entirely written in javascript then?

Of course not. It's more like a browser shell or browser UI written in Javascript (which is still an interesting idea, but not particularly new).

A large portion of Firefox (and SeaMonkey before it) are written in JavaScript, with XUL used to do UI layout.

How is that "entirely" in javascript when the most important parts are basically implemented in Chromium.

There's another thread on the homepage (Show HN of Breach) where the developers of the product are active. https://news.ycombinator.com/item?id=8016307

Javascript seems to be in some feedback loop where so much is written in Javascript that so many people learn Javascript that it increasingly seems sensible to write more things in Javascript.

If it's entirely in JS, can I run it in my current browser?

I have some security concerns about this. How to protect yourself from unsafe websites?