Huh, I would have sworn that Internet Explorer had the blink tag at one point, but I think my parents had Netscape and then Mozilla pretty early so maybe that's what I'm confusing it with.
Regardless, I stand by my comment. Monsters! I want my browser to be obnoxious.
I think I remember reading articles about how to implement blink in IE using behaviors, some IE only thing that didn't take hold(?), Maybe this was around IE5.
Never mind, Microsoft got you with <marquee>.
In theory, in 1996 Netscape and Microsoft agreed to kill <blink> and <marquee> <https://www.w3.org/People/Raggett/book4/ch02.html>, but although they were kept out of the spec, neither removed its implementation, and then IE dominated the browser market, and <marquee> became popular enough that the remaining parties were bullied into shipping it (Netscape in 2002, Presto in 2003, no idea about the KHTML/WebKit timeline), and so ultimately it was put into the HTML Standard.