diff --git a/examples/popup.html b/examples/popup.html
index 418bbf2df5..272fa75009 100644
--- a/examples/popup.html
+++ b/examples/popup.html
@@ -12,7 +12,6 @@
       .ol-popup {
         position: absolute;
         background-color: white;
-        -moz-box-shadow: 0 1px 4px rgba(0,0,0,0.2);
         -webkit-filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
         filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
         padding: 15px;