This seems a bit harsh. From the article, "I’m going to keep talking about the Apple font, because that’s the code path I worked on in Chrome..." Although this

This seems a bit harsh. From the article, "I’m going to keep talking about the Apple font, because that’s the code path I worked on in Chrome..." Although this is toward the end of the article, it does give a good reason for why the author is only focusing on a rather small domain: she worked on this specific domain (Chrome, Apple, emoji). In case it wasn't immediately obvious, she doesn't actually mention any browser (or rendering engine) other than Chrome (Blink). Perhaps you were looking for a more complete essay on all things emoji, but it looks more like the author just wanted to write about some stuff she had worked on that she thought was interesting.