diff -r 000000000000 -r 6474c204b198 browser/metro/theme/cssthrobber.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/metro/theme/cssthrobber.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,94 @@
+/* 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/. */
+
+%filter substitution
+%include defines.inc
+
+#container[enabled] .progressBall {
+  position: absolute;
+  opacity: 0;
+  transform: rotate(225deg);
+  animation: orbit 7.15s infinite;
+}
+
+#container[enabled] .progressBall:nth-child(1) {
+  animation-delay: 1.56s;
+}
+
+#container[enabled] .progressBall:nth-child(2) {
+  animation-delay: 0.31s;
+}
+
+#container[enabled] .progressBall:nth-child(3) {
+  animation-delay: 0.62s;
+}
+
+#container[enabled] .progressBall:nth-child(4) {
+  animation-delay: 0.94s;
+}
+
+#container[enabled] .progressBall:nth-child(5) {
+  animation-delay: 1.25s;
+}
+
+#container[enabled] .progressBall:nth-child(1)::after,
+#container[enabled] .progressBall:nth-child(2)::after,
+#container[enabled] .progressBall:nth-child(3)::after,
+#container[enabled] .progressBall:nth-child(4)::after,
+#container[enabled] .progressBall:nth-child(5)::after {
+  content: "";
+  display: block;
+  width: 5px;
+  height: 5px;
+  border-radius: 5px;
+  position: absolute;
+  background: #0095dd;
+  left: 0;
+  top: 0;
+}
+
+
+@keyframes orbit {
+  0% {
+    opacity: 1;
+    z-index: 99;
+    transform: rotate(180deg);
+    animation-timing-function: ease-out;
+  }
+
+  7% {
+    opacity: 1;
+    transform: rotate(300deg);
+    animation-timing-function: linear;
+  }
+
+  30% {
+    opacity: 1;
+    transform: rotate(410deg);
+    animation-timing-function: ease-in-out;
+  }
+
+  39% {
+    opacity: 1;
+    transform: rotate(645deg);
+    animation-timing-function: linear;
+  }
+
+  70% {
+    opacity: 1;
+    transform: rotate(770deg);
+    animation-timing-function: ease-out;
+  }
+
+  75% {
+    opacity: 1;
+    transform: rotate(900deg);
+    animation-timing-function: ease-out;
+  }
+
+  76%, 100% {
+    opacity: 0;
+    transform: rotate(900deg);
+  }
+}