A bit off topic but that article -- as well as the rest of the site -- is absolutely gorgeous. The smart use of context-specific text colors such as green for section headers, red for emphasis, white-on-blue for code blocks, and (my favorite example) orange for external links vs yellow for internal links; the highly readable but nevertheless classic console font; the razor sharp lines/boxes; and the jet-black background come together to make it feel like I'm reading a BBS in high school in 1992. One of the reasons I really like i3wm is this particular aesthetic, combining modern content with authentic retro design.
I get the "malicious browser" message from my office connection, not from my home connection (using the same browser, just a different proxy).
My office connection is a business OVH fiber, and it's quite often banned, or subject to additional captchas and other annoyances, I assume because some admins see "OVH" and assume it's a bot.