I got the loop in both desktop Chrome and Firefox, as well as Android Chrome, Brave and Firefox (though these timed out after a few loops, unlike the desktop).
Oh man I forgot all about <frameset> and <frame> tags to create navigation. From the early days before we had dynamic sites or static site generators with templates, we had our browsers do our "templating" for us!
Nice! Never knew that. I wish more companies with popular sites did this. I'm sure it cost them about no money nor time to just shovel it off like this.
So broken after just 4 years