diff --git a/toolkit/content/widgets/richlistbox.xml b/toolkit/content/widgets/richlistbox.xml
index 8be653bdca97..baed6e4a41f2 100644
--- a/toolkit/content/widgets/richlistbox.xml
+++ b/toolkit/content/widgets/richlistbox.xml
@@ -888,6 +888,10 @@
           if (this.getRowCount() > 0) {
             if (this.currentIndex == -1) {
               this.currentIndex = this.getIndexOfFirstVisibleRow();
+              let currentItem = this.getItemAtIndex(this.currentIndex);
+              if (currentItem) {
+                this.selectItem(currentItem);
+              }
             } else {
               this.currentItem._fireEvent("DOMMenuItemActive");
             }