diff --git a/xpfe/global/resources/content/xul.css b/xpfe/global/resources/content/xul.css
index 6b7eda82b36b..e5eff3c0afe9 100644
--- a/xpfe/global/resources/content/xul.css
+++ b/xpfe/global/resources/content/xul.css
@@ -29,7 +29,7 @@ checkbox,radio,tree,menulist {
 }
 
   
-menupopup, splitter {
+menupopup, popup, splitter {
   user-focus: ignore;
 }
 
diff --git a/xpfe/global/resources/skin/xul.css b/xpfe/global/resources/skin/xul.css
index 195ffe46131b..ce43b5c24287 100644
--- a/xpfe/global/resources/skin/xul.css
+++ b/xpfe/global/resources/skin/xul.css
@@ -29,7 +29,7 @@ checkbox,radio,tree,menulist {
 }
 
   
-menupopup, splitter {
+menupopup, popup, splitter {
   user-focus: ignore;
 }