Doesn't work right now

EBookJapanRipper.user.js

// ==UserScript==
// @name         EBookJapanRipper
// @version      1.10
// @downloadURL  https://gist.githubusercontent.com/chocolatkey/ad0c04b0768f5fcdd3ea3c6cb089b8b2/raw
// @supportURL   https://gist.github.com/chocolatkey/ad0c04b0768f5fcdd3ea3c6cb089b8b2
// @description  Send my regards to "t-hamaguchi" lol
// @author       chocolatkey
// @homepage     https:/github.com/chocolatkey
// @include      http://*br.ebookjapan.jp*
// @include      https://*br.ebookjapan.jp*
// @run-at       document-start
// @require      https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js
// @require      https://raw.githubusercontent.com/eligrey/FileSaver.js/master/FileSaver.min.js
// ==/UserScript==

var min = 1;
var max = 0;
(function (unsafeWindow) {
    var already = false;

    $( document ).ready(function() {
        console.log( "Ripper available" );
    });

    $(document).on("keydown", function(e) {
        if((e.shiftKey && e.keyCode == 68) && !already)
        {
            console.log( "Ripper shown" );
            already = true;
            max = BR_slider.maxNum + 1;

            $( "#viewArea" ).append( "\
<div style='position: fixed; top: 5px; right: 5px; width: 150px; height: auto; background: #e2e2e2; padding: 5px; z-index: 999;'>\
<center><b><h3 id='ebjrp-title'>==== Ripper ====</h3></b></center>\
<button id='ebjrp-start' style='width: 150px;'>Rip!</button><br>\
First:<input type='number' id='eb1' style='width: 40px;' name='quantity' min='1' max='" + (BR_slider.maxNum + 1) + "' value='1'>&nbsp;\
Last:<input type='number' id='eb2' style='width: 40px;' name='quantity' min='1' max='" + (BR_slider.maxNum + 1) + "' value='" + (BR_slider.maxNum + 1) + "'>\
</div>\
" );
            $( "#eb1" ).change(function() {
                min = $(this).val();
            });
            $( "#eb2" ).change(function() {
                max = $(this).val();
            });

            $( "#ebjrp-start" ).click(function() {
                console.log( "Rippin' " + min + "-" + max);
                $("#ebjrp-title").html("<i>This may take a while...</i>");
                for (i = (min-1); i <= (max-1); i++) {
                    worker(i);
                }
            });
        }
    });
    function worker(i) {
        __get_image(i, function(c) {
            console.log("p" + i + " ready");
            $("#ebjrp-title").html("Latest: p" + (i+1) + " ready");
            var cname = "ebjrp-c-" + i;
            BR_ROOT.BR_global.BR_ViewerGlobal.BR_inner.append('<canvas id="' + cname + '" style="top:-9999px;"></canvas>');
            var f = document.getElementById(cname);
            f.height = BR_page.jsonData.pif[i].Height;
            f.width = BR_page.jsonData.pif[i].Width;
            var h = f.getContext("2d");
            h.clearRect(0, 0, BR_page.jsonData.pif[i].Width, BR_page.jsonData.pif[i].Height);
            h.strokeStyle = "rgba(0,0,0,0)"; //Last page ;)
            var im = new Image;
            im.onload = function() {
                Module.__xx(h, im, i, false);
                console.log("p" + i + " drawn");
                $( "#" + cname ).each(function() {
                    $( this )[0].toBlob(function(blob) {
                        console.log("p" + i + " saving");
                        saveAs(blob, pad((i+1), 3) + ".png");
                        $( "#" + cname ).remove();
                        console.log("p" + i + " done");
                        $("#ebjrp-title").html("Latest: p" + (i+1) + " done");
                    });
                });
            };
            im.src = c;
        });
    }
    function pad (str, max) {
      str = str.toString();
      return str.length < max ? pad("0" + str, max) : str;
    }
})();