diff --git a/src/_h5ai/client/js/inc/ext/preview-txt.js b/src/_h5ai/client/js/inc/ext/preview-txt.js
index b9ffdb5c..e80afde7 100644
--- a/src/_h5ai/client/js/inc/ext/preview-txt.js
+++ b/src/_h5ai/client/js/inc/ext/preview-txt.js
@@ -78,15 +78,13 @@ modulejs.define('ext/preview-txt', ['_', '$', 'core/settings', 'core/resource',
 
 		adjustSize = function () {
 
-			var rect = $(window).fracs('viewport'),
+			var $window = $(window),
 				$container = $('#pv-txt-content'),
 				margin = 20,
 				barheight = 31;
 
 			$container.css({
-				// width: rect.width - 2 * margin,
-				height: rect.height - 2 * margin - barheight - 32,
-				// left: margin,
+				height: $window.height() - 2 * margin - barheight - 32,
 				top: margin
 			});
 		},
diff --git a/src/_h5ai/client/js/inc/ext/qrcode.js b/src/_h5ai/client/js/inc/ext/qrcode.js
index 542d5c43..65e807f7 100644
--- a/src/_h5ai/client/js/inc/ext/qrcode.js
+++ b/src/_h5ai/client/js/inc/ext/qrcode.js
@@ -10,14 +10,32 @@ modulejs.define('ext/qrcode', ['_', '$', 'modernizr', 'core/settings', 'core/eve
 
 		$qrcode, hideTimeoutId,
 
+		loadQrCodeExtension = function (callback) {
+
+			if ($.fn.qrcode) {
+				callback();
+			} else {
+				$.ajax({
+					url: allsettings.h5aiAbsHref + 'client/js/qrcode.js',
+					dataType: 'script',
+					complete: function () {
+
+						callback();
+					}
+				});
+			}
+		},
+
 		update = function (entry) {
 
-			$qrcode.empty().qrcode({
-				render: modernizr.canvas ? 'canvas' : 'div',
-				width: settings.size,
-				height: settings.size,
-				color: '#333',
-				text: 'http://' + document.domain + entry.absHref
+			loadQrCodeExtension(function () {
+				$qrcode.empty().qrcode({
+					render: modernizr.canvas ? 'canvas' : 'div',
+					width: settings.size,
+					height: settings.size,
+					color: '#333',
+					text: 'http://' + document.domain + entry.absHref
+				});
 			});
 		},
 
diff --git a/src/_h5ai/client/js/inc/ext/select.js b/src/_h5ai/client/js/inc/ext/select.js
index 6066f3fd..6ae2f4c1 100644
--- a/src/_h5ai/client/js/inc/ext/select.js
+++ b/src/_h5ai/client/js/inc/ext/select.js
@@ -73,13 +73,15 @@ modulejs.define('ext/select', ['_', '$', 'core/settings', 'core/event'], functio
 
 		selectionStart = function (event) {
 
-			var view = $(document).fracs('viewport');
+			var $window = $(window),
+				viewRight = $window.scrollLeft() + $window.width(),
+				viewBottom = $window.scrollTop() + $window.height();
 
 			x = event.pageX;
 			y = event.pageY;
 
 			// only on left button and don't block the scrollbars
-			if (event.button !== 0 || x >= view.right || y >= view.bottom) {
+			if (event.button !== 0 || x >= viewRight || y >= viewBottom) {
 				return;
 			}
 
diff --git a/src/_h5ai/client/js/qrcode.js b/src/_h5ai/client/js/qrcode.js
new file mode 100644
index 00000000..1608743f
--- /dev/null
+++ b/src/_h5ai/client/js/qrcode.js
@@ -0,0 +1,2 @@
+
+// @include "lib/jquery.qrcode-*.js"
diff --git a/src/_h5ai/client/js/scripts.js b/src/_h5ai/client/js/scripts.js
index 7aac0248..0b714814 100644
--- a/src/_h5ai/client/js/scripts.js
+++ b/src/_h5ai/client/js/scripts.js
@@ -2,7 +2,11 @@
 // jQuery libs
 // -----------
 // @include "lib/jquery-*.js"
-// @include "lib/jquery.*.js"
+// @include "lib/jquery.filedrop-*.js"
+// @include "lib/jquery.fracs-*.js"
+// @include "lib/jquery.mousewheel-*.js"
+// @include "lib/jquery.scrollpanel-*.js"
+// @include "lib/jquery.spin-*.js"
 
 // other libs
 // ----------