diff --git a/content/treestyletab/config.xul b/content/treestyletab/config.xul
index 7c05bdb1..bd26108b 100644
--- a/content/treestyletab/config.xul
+++ b/content/treestyletab/config.xul
@@ -130,6 +130,9 @@
 			<radio value="mixed" label="&config.tabbar.style.mixed;"
 				class="image" align="center"
 				src="chrome://treestyletab/content/res/style-mixed.png"/>
+			<radio value="metal" label="&config.tabbar.style.metal;"
+				class="image" align="center"
+				src="chrome://treestyletab/content/res/style-metal.png"/>
 			</hbox>
 			<radio value="" label="&config.tabbar.style.none;"/>
 		</radiogroup>
diff --git a/content/treestyletab/res/style-metal.png b/content/treestyletab/res/style-metal.png
new file mode 100644
index 00000000..36b534fd
Binary files /dev/null and b/content/treestyletab/res/style-metal.png differ
diff --git a/locale/de-DE/treestyletab/treestyletab.dtd b/locale/de-DE/treestyletab/treestyletab.dtd
index d5cdce35..1950be78 100644
--- a/locale/de-DE/treestyletab/treestyletab.dtd
+++ b/locale/de-DE/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "Plain">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "Gemischt">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Standard (durch Theme festgelegt)">
 
 <!ENTITY config.twisty.style.caption "Aufklappsymbole">
diff --git a/locale/en-US/treestyletab/treestyletab.dtd b/locale/en-US/treestyletab/treestyletab.dtd
index 9dd67a99..53bcebeb 100644
--- a/locale/en-US/treestyletab/treestyletab.dtd
+++ b/locale/en-US/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "Plain">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "Mixed">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Default (specified by the Theme)">
 
 <!ENTITY config.twisty.style.caption "Tree twisties">
diff --git a/locale/es-ES/treestyletab/treestyletab.dtd b/locale/es-ES/treestyletab/treestyletab.dtd
index 9db3efb1..007f57e2 100644
--- a/locale/es-ES/treestyletab/treestyletab.dtd
+++ b/locale/es-ES/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "Plano">
 <!ENTITY config.tabbar.style.vertigo "Vértigo">
 <!ENTITY config.tabbar.style.mixed   "Mezclado">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Predeterminado (especificado por el tema actual)">
 
 <!ENTITY config.twisty.style.caption "Estilo del botón de colapsar/expandir">
diff --git a/locale/it-IT/treestyletab/treestyletab.dtd b/locale/it-IT/treestyletab/treestyletab.dtd
index ff841bfb..5febe307 100644
--- a/locale/it-IT/treestyletab/treestyletab.dtd
+++ b/locale/it-IT/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "Semplice">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "Misto">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Predefinito (varia in base al tema)">
 
 <!ENTITY config.twisty.style.caption "Aspetto dei controlli di contrazione/espansione dei sottoalberi">
diff --git a/locale/ja/treestyletab/treestyletab.dtd b/locale/ja/treestyletab/treestyletab.dtd
index 5652503a..985761df 100644
--- a/locale/ja/treestyletab/treestyletab.dtd
+++ b/locale/ja/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "プレーン">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "Mixed">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "なし（テーマ本来の表示スタイル）">
 
 <!ENTITY config.twisty.style.caption "つまみ">
diff --git a/locale/ru-RU/treestyletab/treestyletab.dtd b/locale/ru-RU/treestyletab/treestyletab.dtd
index dd764a70..a8a0b285 100755
--- a/locale/ru-RU/treestyletab/treestyletab.dtd
+++ b/locale/ru-RU/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "Плоские кнопки">
 <!ENTITY config.tabbar.style.vertigo "С подсветкой">
 <!ENTITY config.tabbar.style.mixed   "Смешанный">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "По умолчанию (определяется темой)">
 
 <!ENTITY config.twisty.style.caption "Вид узлов дерева">
diff --git a/locale/zh-CN/treestyletab/treestyletab.dtd b/locale/zh-CN/treestyletab/treestyletab.dtd
index d02102f1..8b992882 100644
--- a/locale/zh-CN/treestyletab/treestyletab.dtd
+++ b/locale/zh-CN/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "简洁">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "混合">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Default (specified by the Theme)">
 
 <!ENTITY config.twisty.style.caption "树的标题点外观">
diff --git a/locale/zh-TW/treestyletab/treestyletab.dtd b/locale/zh-TW/treestyletab/treestyletab.dtd
index 6bd01cb3..9ff00704 100644
--- a/locale/zh-TW/treestyletab/treestyletab.dtd
+++ b/locale/zh-TW/treestyletab/treestyletab.dtd
@@ -21,6 +21,7 @@
 <!ENTITY config.tabbar.style.default "簡潔">
 <!ENTITY config.tabbar.style.vertigo "Vertigo">
 <!ENTITY config.tabbar.style.mixed   "混合">
+<!ENTITY config.tabbar.style.metal   "Metal">
 <!ENTITY config.tabbar.style.none    "Default (specified by the Theme)">
 
 <!ENTITY config.twisty.style.caption "摺疊 / 展開的圖示">