--- a/toolkit/themes/shared/extensions/extensions.inc.css
+++ b/toolkit/themes/shared/extensions/extensions.inc.css
@@ -132,17 +132,16 @@
 .loading {
   list-style-image: url("chrome://global/skin/icons/loading_16.png");
   padding-left: 20px;
   padding-right: 20px;
 }
 
 button.warning {
   list-style-image: url("chrome://mozapps/skin/extensions/alerticon-warning.svg");
-  list-stye-position: inside;
 }
 
 
 /*** category selector ***/
 
 #categories {
   padding-top: 0;
 }