diff --git a/toolkit/themes/pinstripe/global/dirListing/dirListing.css b/toolkit/themes/pinstripe/global/dirListing/dirListing.css
index 92339dcc015..f529befac36 100755
--- a/toolkit/themes/pinstripe/global/dirListing/dirListing.css
+++ b/toolkit/themes/pinstripe/global/dirListing/dirListing.css
@@ -131,7 +131,6 @@ td:not(:first-child) {
 .file > img {
   margin-right: 4px;
   margin-left: -20px;
-  opacity: .6;
   vertical-align: middle;
 }
 
@@ -142,9 +141,3 @@ td:not(:first-child) {
 .dir::before {
   content: url(chrome://global/skin/dirListing/folder.png);
 }
-
-.up:hover::before ,
-tr:hover > td > a::before ,
-tr:hover > td > .file > img {
-  opacity: 1;
-}
diff --git a/toolkit/themes/winstripe/global/dirListing/dirListing.css b/toolkit/themes/winstripe/global/dirListing/dirListing.css
index 462d6e19849..7c5a6e79c88 100755
--- a/toolkit/themes/winstripe/global/dirListing/dirListing.css
+++ b/toolkit/themes/winstripe/global/dirListing/dirListing.css
@@ -131,16 +131,9 @@ td:not(:first-child) {
 .file > img {
   margin-right: 4px;
   margin-left: -20px;
-  opacity: .6;
   vertical-align: middle;
 }
 
 .up::before {
   content: url(chrome://global/skin/dirListing/up.png);
 }
-
-.up:hover::before ,
-tr:hover > td > a::before ,
-tr:hover > td > .file > img {
-  opacity: 1;
-}