bookmarklet_inject_css.js

javascript: (function() {

    var url = prompt('URL of CSS to inject:', '');

    if (url) {

        console.log('CSS inject request URL:', url);

        var link = document.createElement('link');
        link.href = url;
        link.rel = "stylesheet";
        document.getElementsByTagName('head')[0].appendChild(link);

        console.log('Injected CSS: ', link);
    }

})();