diff -r 000000000000 -r 6474c204b198 toolkit/themes/windows/global/appPicker.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/themes/windows/global/appPicker.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+#app-picker {
+  width: 320px;
+}
+
+#content-description {
+  font-weight: bold;
+}
+
+#content-icon,
+.listcell-icon {
+  margin: 5px;
+  width: 32px;
+  height: 32px;
+}
+
+.listcell-label {
+  padding: 5px;
+}