Switches off all the remote stylesheets, so you can see how you page looks with only inlined CSS. (function() { var styles = document.querySelectorAll('link[rel=\'stylesheet\']'); for (var s = 0; s < styles.length; s++) { styles[s].mediax = styles[s].media; if (styles[s].media === 'only x') { styles[s].media = styles[s].mediax; } else if (styles[s].media !== 'print') { styles[s].media = 'only x'; } } })();