HTML <marquee> elements are broken on goftesh.com in Tor Browsr

It seems Tor Browser is breaking <marquee> elements somehow. This got reported on our blog (https://blog.torproject.org/comment/270124#comment-270124) the example being goftesh.com

This works in Firefox 52 ESR. I flipped the first-party isolation pref and things are still working in Firefox 52 ESR. Disabling NoScript, HTTPS-E and Torbutton in Tor Browser does not solve the problem. Looking back in history this seems to be a bug already included in old Tor Browser versions. I tested Tor Browser 4.0 and there the <marquee> element is broken as well.