diff --git a/sliding-bookmarks-bar.css b/sliding-bookmarks-bar.css
index c1347d9..3ded3d9 100644
--- a/sliding-bookmarks-bar.css
+++ b/sliding-bookmarks-bar.css
@@ -45,6 +45,10 @@
   z-index: 4 !important;
 }
 
+#navigator-toolbox {
+  z-index: 3 !important;
+}
+
 #navigator-toolbox:hover > #PersonalToolbar:not([customizing]) {
   position: absolute !important;
   transform: translateY(100%) scaleY(1);