They included the pdf in an iframe on the page, which most browsers will want to load instantly. If a browser is configured to download PDFs instead of render t

They included the pdf in an iframe on the page, which most browsers will want to load instantly. If a browser is configured to download PDFs instead of render them inline, this is expected behavior. Using an iframe is a pretty bad way to offer a PDF to viewers, but the website definitely has quite a few strange mannerisms apart from that.