diff --git a/toolkit/themes/pinstripe/global/jar.mn b/toolkit/themes/pinstripe/global/jar.mn
index 92a1fd4621f2..a91d94122e14 100644
--- a/toolkit/themes/pinstripe/global/jar.mn
+++ b/toolkit/themes/pinstripe/global/jar.mn
@@ -161,5 +161,3 @@ toolkit.jar:
   skin/classic/global/tree/columnpicker.gif                          (tree/columnpicker.gif)
   skin/classic/global/tree/folder.png                                (tree/folder.png)
   skin/classic/global/tree/item.png                                  (tree/item.png)
-  skin/classic/global/tree/sort-asc.gif                              (tree/sort-asc.gif)
-  skin/classic/global/tree/sort-dsc.gif                              (tree/sort-dsc.gif)
diff --git a/toolkit/themes/pinstripe/global/listbox.css b/toolkit/themes/pinstripe/global/listbox.css
index 0f02c062d1c1..dfec7b134363 100644
--- a/toolkit/themes/pinstripe/global/listbox.css
+++ b/toolkit/themes/pinstripe/global/listbox.css
@@ -106,21 +106,6 @@ listheader[sortable="true"]:hover:active {
   margin: 0px !important;
 }
 
-/* ..... sort direction icon ..... */
-
-.listheader-sortdirection {
-  -moz-appearance: treeheadersortarrow;
-  list-style-image: none;
-}
-
-.listheader-sortdirection[sortDirection="ascending"] {
-  list-style-image: url("chrome://global/skin/tree/sort-asc.gif");
-}
-
-.listheader-sortdirection[sortDirection="descending"] {
-  list-style-image: url("chrome://global/skin/tree/sort-dsc.gif");
-}
-
 /* ::::: listcell ::::: */
 
 .listcell-label {
diff --git a/toolkit/themes/pinstripe/global/tree.css b/toolkit/themes/pinstripe/global/tree.css
index a317c3c53586..9b170fba210c 100644
--- a/toolkit/themes/pinstripe/global/tree.css
+++ b/toolkit/themes/pinstripe/global/tree.css
@@ -276,21 +276,6 @@ treechildren::-moz-tree-column(insertafter) {
   -moz-border-end: 1px solid ThreeDShadow;
 }
 
-/* ::::: sort direction indicator :::::  */
-
-.treecol-sortdirection {
-  -moz-appearance: treeheadersortarrow;
-  list-style-image: none;
-}
-
-.treecol-sortdirection[sortDirection="ascending"] {
-  list-style-image: url("chrome://global/skin/tree/sort-asc.gif");
-}
-
-.treecol-sortdirection[sortDirection="descending"] {
-  list-style-image: url("chrome://global/skin/tree/sort-dsc.gif");
-}
-
 /* ::::: column picker :::::  */
 
 .tree-columnpicker-icon {
diff --git a/toolkit/themes/pinstripe/global/tree/sort-asc.gif b/toolkit/themes/pinstripe/global/tree/sort-asc.gif
deleted file mode 100644
index 5e13c7398f16..000000000000
Binary files a/toolkit/themes/pinstripe/global/tree/sort-asc.gif and /dev/null differ
diff --git a/toolkit/themes/pinstripe/global/tree/sort-dsc.gif b/toolkit/themes/pinstripe/global/tree/sort-dsc.gif
deleted file mode 100644
index fa957ac1e759..000000000000
Binary files a/toolkit/themes/pinstripe/global/tree/sort-dsc.gif and /dev/null differ