Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.
for (let ibx of document.getElementsByClassName('infobox')) {for (let img of ibx.querySelectorAll('.infobox-image')) {        let thumb = document.createElement('div');        thumb.classList.add('thumb');        thumb.classList.add('tright');        let thumbinner = document.createElement('div');        thumbinner.classList.add('thumbinner');        thumb.appendChild(thumbinner);        thumbinner.innerHTML = img.innerHTML;        ibx.parentNode.insertBefore(thumb, ibx);}ibx.parentNode.removeChild(ibx);}