I don’t know how much a human was involved in making this, but clearly not enough. Some parts of the timing it’s talking about make no sense, the ordering of some parts is incoherent, and it promptly goes into unreasonable and irrelevant detail while completely missing other actually relevant aspects of that detail. For example, “HSTS preload”: it’s utterly irrelevant, because you already know it’s HTTPS; and even if it were HTTP, you should talk about HSTS, the preload list is effectively just a prefilled cache; it then adds more to that cache as you visit sites that have HSTS headers.

I’m very confident that if I looked further I’d find it riddled with errors. I just skimmed it and looked at a couple of the bits I’m most familiar with and immediately found notable errors.