a[href*="http"] {
background: url('https://mdn.mozillademos.org/files/12982/external-link-52.png') no-repeat 100% 0;
background-size: 16px 16px;
padding-right: 19px;
}
//https://developer.mozilla.org/en-US/docs/Learn/CSS/Styling_text/Styling_links