diff --git a/themes/classic/navigator/pageInfo.css b/themes/classic/navigator/pageInfo.css
index 50acfb45b4f8..0020ce88d5fc 100644
--- a/themes/classic/navigator/pageInfo.css
+++ b/themes/classic/navigator/pageInfo.css
@@ -46,6 +46,7 @@ textbox > .textarea-internal-box {
   background: transparent !important;
   border: none;
   padding: 0px;
+  -moz-appearance: none;
 }
 
 textbox.header {