Set As Homepage

Makes your site the visitor's browser home page in one click.

In 2026: Dead, and good. It was an IE-only behavior: property, always gated behind a confirm dialog, and it was abused constantly. It died with IE's legacy document modes, and no other browser ever implemented it.

Where it came from: Microsoft Internet Explorer 5 default behaviors, MSDN, 1999. Wikipedia ↗

<a href="#" onclick="this.style.behavior='url(#default#homepage)';
                     this.setHomePage('http://www.example.com/'); return false">
  Make this your home page!
</a>

<!-- Nothing replaced it. If you want to be somebody's home page, be good. -->