--- a/browser/themes/shared/places/tree-icons.inc.css
+++ b/browser/themes/shared/places/tree-icons.inc.css
@@ -6,18 +6,19 @@ treechildren::-moz-tree-image(title) {
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.svg");
   padding-inline-end: 2px;
   margin: 0 2px;
   width: 16px;
   height: 16px;
 }
 
 treechildren:-moz-tree-image {
-  -moz-context-properties: fill;
+  -moz-context-properties: fill, fill-opacity;
   fill: -moz-FieldText;
+  fill-opacity: 0.7;
 }
 
 treechildren::-moz-tree-image(title, livemarkItem) {
   list-style-image: url("chrome://browser/skin/places/livemark-item.png");
   -moz-image-region: rect(0px, 16px, 16px, 0px);
 }
 
 treechildren::-moz-tree-image(title, livemarkItem, visited) {