press F12 in your Browser then choose console and paste the below code there and press enter: var all = document.getElementsByTagName("*"), i = 0, rect, docWidth = document.documentElement.offsetWidth; for (; i < all.length; i++) { rect = all[i].getBoundingClientRect(); if (rect.right > docWidth || rect.left < 0){ console.log(all[i]); all[i].style.borderTop = '1px solid red'; } }
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Click to optimize width for Twitter