1.) We use http://www.w3.org/TR/html5/syntax.html#named-character-references as official site - so open it in Chrome
2.) Chrome Console: Insert JQuery in the page:
javascript:if(!window.jQuery||confirm('Overwrite\x20current\x20version?\x20v'+jQuery.fn.jquery))(function(d,s){s=d.createElement('script');s.src='http://code.jquery.com/jquery.js';(d.head||d.documentElement).appendChild(s)})(document);
3.) Chrome Console: Get all Entites