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';
}
}
})();