diff -r 000000000000 -r 6474c204b198 browser/themes/shared/devtools/dark-theme.css
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/themes/shared/devtools/dark-theme.css	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,339 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* 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/. */
+
+/* According to:
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=715472#c17
+ */
+.theme-body {
+  background: #14171a;
+  color: #a9bacb;
+}
+
+.theme-sidebar {
+  background: #181d20;
+  color: #a9bacb;
+}
+
+::-moz-selection {
+  background-color: #1d4f73;
+  color: #f5f7fa;
+}
+
+.theme-bg-darker {
+  background-color: rgba(0,0,0,0.5);
+}
+
+.theme-selected {
+  background-color: #1d4f73;
+  color: #f5f7fa; /* Light foreground text */
+}
+
+.theme-bg-contrast,
+.variable-or-property:not([overridden])[changed] { /* contrast bg color to attract attention on a container */
+  background: #a18650;
+}
+
+.theme-link,
+.cm-s-mozilla .cm-link { /* blue */
+  color: #3689b2;
+}
+
+/*
+ * FIXME: http://bugzil.la/575675 CSS links without :visited set cause assertion
+ * failures in debug builds.
+ */
+.theme-link:visited,
+.cm-s-mozilla .cm-link:visited { /* blue */
+  color: #3689b2;
+}
+
+
+.theme-comment,
+.cm-s-mozilla .cm-meta,
+.cm-s-mozilla .cm-hr,
+.cm-s-mozilla .cm-comment,
+.variable-or-property .token-undefined,
+.variable-or-property .token-null { /* grey */
+  color: #5c6773;
+}
+
+.theme-gutter {
+  background-color: #0f171f;
+  color: #667380;
+  border-color: #303b47;
+}
+
+.theme-separator { /* grey */
+  border-color: #303b47;
+}
+
+.theme-fg-color1,
+.cm-s-mozilla .cm-number,
+.variable-or-property .token-number,
+.variable-or-property[return] > .title > .name,
+.variable-or-property[scope] > .title > .name { /* green */
+  color: #5c9966;
+}
+
+.theme-fg-color2,
+.cm-s-mozilla .cm-attribute,
+.cm-s-mozilla .cm-variable,
+.cm-s-mozilla .cm-def,
+.cm-s-mozilla .cm-property,
+.cm-s-mozilla .cm-qualifier,
+.variables-view-variable > .title > .name { /* blue */
+  color: #3689b2;
+}
+
+.theme-fg-color3,
+.cm-s-mozilla .cm-builtin,
+.cm-s-mozilla .cm-tag,
+.cm-s-mozilla .cm-header,
+.variables-view-property > .title > .name { /* pink/lavender */
+  color: #a673bf;
+}
+
+.theme-fg-color4 { /* purple/violet */
+  color: #6270b2;
+}
+
+.theme-fg-color5,
+.cm-s-mozilla .cm-bracket,
+.cm-s-mozilla .cm-keyword { /* Yellow */
+  color: #a18650;
+}
+
+.theme-fg-color6,
+.cm-s-mozilla .cm-string,
+.cm-s-mozilla .cm-string-2,
+.variable-or-property .token-string { /* Orange */
+  color: #b26b47;
+}
+
+.theme-fg-color7,
+.cm-s-mozilla .cm-atom,
+.cm-s-mozilla .cm-quote,
+.cm-s-mozilla .cm-error,
+.variable-or-property .token-boolean,
+.variable-or-property .token-domnode,
+.variable-or-property[exception] > .title > .name { /* Red */
+  color: #bf5656;
+}
+
+.variable-or-property .token-domnode {
+  font-weight: bold;
+}
+
+.theme-toolbar,
+.devtools-toolbar,
+.devtools-sidebar-tabs > tabs,
+.CodeMirror-dialog { /* General toolbar styling */
+  color: #b6babf;
+  background-color: #343c45;
+  border-color: hsla(210,8%,5%,.6);
+}
+
+.theme-fg-contrast { /* To be used for text on theme-bg-contrast */
+  color: black;
+}
+
+.ruleview-colorswatch,
+.computedview-colorswatch,
+.markupview-colorswatch {
+  box-shadow: 0 0 0 1px rgba(0,0,0,0.5);
+}
+
+/* CodeMirror specific styles.
+ * Best effort to match the existing theme, some of the colors
+ * are duplicated here to prevent weirdness in the main theme. */
+
+.CodeMirror { /* Inherit platform specific font sizing and styles */
+  font-family: inherit;
+  font-size: inherit;
+  background: transparent;
+}
+
+.CodeMirror pre,
+.cm-s-mozilla .cm-variable-2,
+.cm-s-mozilla .cm-variable-3,
+.cm-s-mozilla .cm-operator,
+.cm-s-mozilla .cm-special { /* theme-body color */
+  color: #a9bacb;
+}
+
+.cm-s-mozilla .CodeMirror-lines .CodeMirror-cursor {
+  border-left: solid 1px #fff;
+}
+
+.cm-s-mozilla.CodeMirror-focused .CodeMirror-selected { /* selected text (focused) */
+  background: rgb(185, 215, 253);
+}
+
+.cm-s-mozilla .CodeMirror-selected { /* selected text (unfocused) */
+  background: rgb(176, 176, 176);
+}
+
+.cm-s-mozilla .CodeMirror-activeline-background { /* selected color with alpha */
+  background: rgba(185, 215, 253, .15);
+}
+
+div.cm-s-mozilla span.CodeMirror-matchingbracket { /* highlight brackets */
+  outline: solid 1px rgba(255, 255, 255, .25);
+  color: white;
+}
+
+/* Highlight for a line that contains an error. */
+div.CodeMirror div.error-line {
+  background: rgba(255,0,0,0.2);
+}
+
+/* Highlight for a line that represents a stack frame's location. */
+div.CodeMirror div.debug-line {
+  background: rgba(0,128,255,0.1);
+  box-shadow:
+    0 1px 0 0 rgba(0,128,255,0.4),
+    0 -1px 0 0 rgba(0,128,255,0.4);
+}
+
+/* Generic highlighted text */
+div.CodeMirror span.marked-text {
+  background: rgba(255,255,0,0.2);
+  border: 1px dashed rgba(192,192,0,0.6);
+  -moz-margin-start: -1px;
+  -moz-margin-end: -1px;
+}
+
+/* Highlight for evaluating current statement. */
+div.CodeMirror span.eval-text {
+  background-color: #556;
+}
+
+.cm-s-mozilla .CodeMirror-linenumber { /* line number text */
+  color: #5f7387;
+}
+
+.cm-s-mozilla .CodeMirror-gutters { /* vertical line next to line numbers */
+  border-right-color: #343c45;
+  background-color: #181d20;
+}
+
+.cm-s-markup-view pre {
+  line-height: 1.4em;
+  min-height: 1.4em;
+}
+
+/* Twisty and checkbox controls */
+.theme-twisty, .theme-checkbox {
+  width: 14px;
+  height: 14px;
+  background-repeat: no-repeat;
+  background-image: url("chrome://browser/skin/devtools/controls.png");
+  background-size: 56px 28px;
+}
+
+.theme-twisty {
+  cursor: pointer;
+  background-position: -28px -14px;
+}
+
+.theme-twisty:-moz-focusring {
+  outline-style: none;
+}
+
+.theme-twisty[open] {
+  background-position: -42px -14px;
+}
+
+.theme-checkbox {
+  display: inline-block;
+  border: 0;
+  padding: 0;
+  outline: none;
+  background-position: -28px 0;
+}
+
+.theme-checkbox[checked] {
+  background-position: -42px 0;
+}
+
+@media (min-resolution: 2dppx) {
+  .theme-twisty, .theme-checkbox {
+    background-image: url("chrome://browser/skin/devtools/controls@2x.png");
+  }
+}
+
+/* XUL panel styling (see browser/devtools/shared/widgets/Tooltip.js) */
+
+.theme-tooltip-panel .panel-arrowcontent {
+  padding: 5px;
+  background: rgba(19, 28, 38, .9);
+  border-radius: 5px;
+  box-shadow: none;
+  border: 3px solid #434850;
+}
+
+/* Overring panel arrow images to fit with our light and dark themes */
+
+.theme-tooltip-panel .panel-arrow[side="top"] {
+  list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-vertical-dark.png");
+  margin-bottom: -4px;
+}
+
+.theme-tooltip-panel .panel-arrow[side="bottom"] {
+  list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-vertical-dark.png");
+  margin-top: -4px;
+}
+
+.theme-tooltip-panel .panel-arrow[side="left"] {
+  list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-horizontal-dark.png");
+  margin-right: -4px;
+}
+
+.theme-tooltip-panel .panel-arrow[side="right"] {
+  list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-horizontal-dark.png");
+  margin-left: -4px;
+}
+
+@media (min-resolution: 2dppx) {
+  .theme-tooltip-panel .panel-arrow[side="top"],
+  .theme-tooltip-panel .panel-arrow[side="bottom"] {
+    list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-vertical-dark@2x.png");
+  }
+
+  .theme-tooltip-panel .panel-arrow[side="left"],
+  .theme-tooltip-panel .panel-arrow[side="right"] {
+    list-style-image: url("chrome://browser/skin/devtools/tooltip/arrow-horizontal-dark@2x.png");
+  }
+}
+
+.theme-tooltip-panel .devtools-tooltip-simple-text {
+  color: white;
+  border-bottom: 1px solid #434850;
+}
+
+.theme-tooltip-panel .devtools-tooltip-font-previewer-text {
+  color: white;
+}
+
+.theme-tooltip-panel .devtools-tooltip-simple-text:last-child {
+  border-bottom: 0;
+}
+
+.devtools-horizontal-splitter {
+  border-bottom: 1px solid black;
+}
+
+.devtools-side-splitter {
+  -moz-border-end: 1px solid black;
+  border-color: black; /* Needed for responsive container at low width. */
+}
+
+.devtools-textinput,
+.devtools-searchinput {
+  background-color: rgba(24, 29, 32, 1);
+  color: rgba(184, 200, 217, 1);
+}
+
+%include toolbars.inc.css