diff -r 000000000000 -r 6474c204b198 browser/themes/shared/devtools/profiler.inc.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/shared/devtools/profiler.inc.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,79 @@
+%if 0
+/* 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/. */
+%endif
+
+.profiler-sidebar-empty-notice {
+  max-width: 176px;
+  padding: 10px;
+  background-color: rgb(61, 69, 76);
+  color: white;
+  font-weight: bold;
+}
+
+.profiler-sidebar {
+  min-width: 196px;
+}
+
+.profiler-sidebar + .devtools-side-splitter {
+  border-color: transparent;
+}
+
+.profiler-sidebar .devtools-toolbar {
+  -moz-border-end: 1px solid;
+}
+
+.theme-dark .profiler-sidebar .devtools-toolbar {
+  -moz-border-end-color: black; /* Match the splitter. */
+}
+
+.theme-light .profiler-sidebar .devtools-toolbar {
+  -moz-border-end-color: #aaa; /* Match the splitter color. */
+}
+
+
+.profiler-sidebar-item {
+  padding: 3px 5px;
+}
+
+.profiler-sidebar-item, .side-menu-widget-item-contents {
+  cursor: default;
+}
+
+.profiler-sidebar-item > h3 {
+  font-size: 13px;
+  display: block;
+  cursor: pointer;
+}
+
+.profiler-sidebar-item > hbox {
+  margin-top: 2px;
+}
+
+.profiler-sidebar-item > hbox > a {
+  display: none;
+  text-decoration: underline;
+  cursor: pointer;
+}
+
+.selected [state=completed] .profiler-sidebar-item > hbox > a {
+  display: block;
+}
+
+.theme-dark .selected .profiler-sidebar-item > hbox {
+  color: #b6babf;
+}
+
+.theme-light .selected .profiler-sidebar-item > hbox {
+  color: #ebeced;
+}
+
+#profiler-start {
+  list-style-image: url("chrome://browser/skin/devtools/profiler-stopwatch.png");
+  -moz-image-region: rect(0px,16px,16px,0px);
+}
+
+#profiler-start[checked] {
+  -moz-image-region: rect(0px,32px,16px,16px);
+}