javascript: (function() {
const img = document.querySelector('article img');
if (img) {
const a = document.createElement('a');
a.href = img.src;
a.download = 'instagram_photo.jpg';
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
} else {
alert(
'%E7%94%BB%E5%83%8F%E3%81%8C%E8%A6%8B%E3%81%A4%E3%81%8B%E3%82%8A%E3%81%BE%E3%81%9B%E3%82%93%E3%81%A7%E3%81%97%E3%81%9F%E3%80%82'
);
}
})();
