Below is the test post I used while developing my script to download Stack Exchange posts to publish on my blog. For a good long time I thought my script was broken because this page included so many missing glyph boxes (□). But then I started thinking about fonts for websites and it occured to me that maybe the problem isn't with my script, but with the browser. Indeed, switching to Arial fixes the problem and renders nearly the same as the original.
This is a companion discussion topic for the original entry at https://jlericson.com/2018/12/17/tony_the_pony.html