diff --git a/src/zen/common/styles/zen-sidebar.css b/src/zen/common/styles/zen-sidebar.css
index 3f32a010..63f66cc7 100644
--- a/src/zen/common/styles/zen-sidebar.css
+++ b/src/zen/common/styles/zen-sidebar.css
@@ -15,12 +15,7 @@
     border-radius: var(--zen-native-inner-radius);
     box-shadow: var(--zen-big-shadow);
     overflow: hidden;
-    &[positionend=''] {
-      order: 6;
-      & ~ #sidebar-splitter {
-        order: 5;
-      }
-    }
+    
     :root:not([zen-right-side='true']) &[positionend='true'] {
       margin-right: var(--zen-element-separation);
     }
@@ -29,6 +24,16 @@
       margin-left: var(--zen-element-separation);
     }
   }
+
+  & #tabbrowser-tabbox[sidebar-positionend] {
+    & #sidebar-box {
+      order: 7 !important;
+    }
+    
+    & #sidebar-splitter {
+      order: 6 !important;
+    }
+  }
 }
 
 /* Menubar */