I would think the examples are there to show the difference between the two methods but in firefox the innertext column only shows "undefined". Maybe a picture could be used for firefox users?
Are there "firefox users" upon the HN crowd though (or the intended technical / web dev crowd)?
I'd say that pretty much all of those of article was intended for have 3 or more browsers installed and regularly test things on each. It wouldn't be much for them to check the article in a different browser if they cared for its contents.
why shouldn't there be "firefox users" in the HN crowd?
Anyway, the purpose of the code example there was to show how it looks and explains some more things in the text afterwards. If you don't see what he means because you're using a different browser, it's essentially pointless to show it at all.
