设置为首页.html

<!DOCTYPE html>
<html>
  <head>
    <title>设为首页</title>
    <meta charset="UTF-8" />
  </head>

  <body>
    <a onclick="SetHome(this,window.location)" style="cursor:hand">设为首页</a>

    <script>
      function SetHome(obj, vrl) {
        try {
          console.log(obj.__proto__)
          obj.style.behavior = "url(#default#homepage)";
          obj.setHomePage(vrl);
        } catch (e) {
          console.log('wwew')
          if (window.netscape) {
            console.log(eqwe)
            try {
              netscape.security.PrivilegeManager.enablePrivilege(
                "UniversalXPConnect"
              );
            } catch (e) {
              alert(
                "此操作被浏览器拒绝！\n请在浏览器地址栏输入“about:config”并回车\n然后将[signed.applets.codebase_principal_support]设置为'true'"
              );
            }
            var prefs = Components.classes[
              "@mozilla.org/preferences-service;1"
            ].getService(Components.interfaces.nsIPrefBranch);
            prefs.setCharPref("browser.startup.homepage", vrl);
          }
        }
      }
    </script>
  </body>
</html>