diff --git a/css/userChrome-files/library.css b/css/userChrome-files/library.css
index 243e334..b15ce81 100644
--- a/css/userChrome-files/library.css
+++ b/css/userChrome-files/library.css
@@ -133,15 +133,7 @@
   }
   @media screen and (-moz-os-version:windows-win7) {
     treechildren {
-      --treechildren-outline: none!important;
-      --treechildren-selectedBorder: none!important;
-      --treechildren-selectedBottomBorder: none!important;
-      --treechildren-selectedFocusCurrentBorder: none!important;
-      --treechildren-selectedFocusCurrentBottomBorder: none!important;
-      --treechildren-hoverBorder: none!important;
-      --treechildren-hoverBottomBorder: none!important;
-      --treechildren-hoverSelectedBorder: none!important;
-      --treechildren-hoverSelectedBottomBorder: none!important
+      --treechildren-outline: none!important
     }
   }
 }
\ No newline at end of file
diff --git a/userChrome.css b/userChrome.css
index 345d868..3c36f53 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -730,15 +730,7 @@ screen and (-moz-os-version:windows-win10) {
   }
   @media screen and (-moz-os-version:windows-win7) {
     treechildren {
-      --treechildren-outline: none!important;
-      --treechildren-selectedBorder: none!important;
-      --treechildren-selectedBottomBorder: none!important;
-      --treechildren-selectedFocusCurrentBorder: none!important;
-      --treechildren-selectedFocusCurrentBottomBorder: none!important;
-      --treechildren-hoverBorder: none!important;
-      --treechildren-hoverBottomBorder: none!important;
-      --treechildren-hoverSelectedBorder: none!important;
-      --treechildren-hoverSelectedBottomBorder: none!important
+      --treechildren-outline: none!important
     }
   }
 }