diff -r 000000000000 -r 6474c204b198 b2g/chrome/content/shell.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/b2g/chrome/content/shell.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/* 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/. */
+
+html {
+  background: black;
+  overflow: hidden;
+  width: 100%;
+  height: 100%;
+  padding: 0 !important;
+}
+
+body {
+  margin: 0;
+  width: 100%;
+  height: 100%;
+  overflow: hidden;
+}