diff --git a/userChrome.css b/userChrome.css
index 9d7604f..aa899f1 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -95,7 +95,7 @@
 /*= Windows 7, 8 - Tab Bar Background *****************************************/
 @media (-moz-os-version: windows-win7), (-moz-os-version: windows-win8) {
   /* Header Color */
-  :root:not([lwtheme-image]) #navigator-toolbox:-moz-lwtheme {
+  :root:not([lwtheme-image]):-moz-lwtheme {
     background-color: var(--lwt-accent-color) !important;
   }
 }