javascript:(function () {
    var phabricatorURL = 'http://your.phabricator.url';
    var templateSlug = encodeURIComponent('"slug/for/template/"');
    var tokenURL = phabricatorURL + '/login/refresh/';
    var tokenXhr = new XMLHttpRequest();

    tokenXhr.onreadystatechange = function () { xhrHandler(tokenXhr, function (rText) {
        var json = rText.substr(9); // Get rid of for(;;);
        try {
            var response = JSON.parse(json);
        } catch (e) {
            console.log('Failed to parse JSON: ' + e.message);
            console.log(json);
            return;
        }

        if (response.hasOwnProperty('payload') && response.payload.hasOwnProperty('token')) {
            var csrf = response.payload.token;
            var conduitURL = phabricatorURL + '/api/phriction.info';
            var templateXhr = new XMLHttpRequest();

            templateXhr.onreadystatechange = function () { xhrHandler(templateXhr, function (json) {
                try {
                    var response = JSON.parse(json);
                } catch (e) {
                    console.log('Failed to parse JSON: ' + e.message);
                    console.log(json);
                    return;
                }

                if (response.hasOwnProperty('result') && response.result.hasOwnProperty('content')) {
                    var textArea = document.getElementById('document-textarea');
                    if (textArea === null) {
                        console.log("Can't find a textarea to paste into.");
                        return;
                    }

                    textArea.value = response.result.content;
                }
            })};

            templateXhr.open('POST', conduitURL, true);
            templateXhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
            templateXhr.setRequestHeader('X-Phabricator-Csrf', csrf);
            templateXhr.send('output=json&params[slug]=' + templateSlug);
        } else {
            console.log('Token response: ' + rText);
            return;
        }
    })};

    tokenXhr.open('GET', tokenURL, true);
    tokenXhr.send();

    function xhrHandler (xhr, callback) {
        if (xhr.readyState < 4 || xhr.status !== 200) {
            return;
        }

        if (xhr.readyState === 4) {
            callback(xhr.responseText);
        }
    };
})();