It&#x27;s using this code:<p><a href="https:&#x2F;&#x2F;github.com&#x2F;mozilla&#x2F;readability&#x2F;blob&#x2F;master&#x2F;Readability.js" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;mozilla&#x2F;readability&#x2F;blob&#x2F;master&#x2F;Readabili...</a><p>which is a descendant of the original Readability.js published by Arc90, before they decided to turn it into a proprietary Instapaper clone.<p>It extracts what looks like article text from the page markup. DOM elements included for a printer-friendly view could possibly be helping, but it doesn&#x27;t target that directly.