diff --git a/platform/Linux/skin/classic/treestyletab/treestyletab.css b/platform/Linux/skin/classic/treestyletab/treestyletab.css
index 7273811e..d2d52430 100644
--- a/platform/Linux/skin/classic/treestyletab/treestyletab.css
+++ b/platform/Linux/skin/classic/treestyletab/treestyletab.css
@@ -28,3 +28,10 @@
 	-moz-border-right-colors: none !important;
 }
 
+
+/* splitter for floating & autohide tab bar */
+#TabsToolbar .treestyletab-splitter {
+	width: 6px;
+	-moz-appearance: none;
+}
+