Better CSS hack for Bug 740917

media/css/sandstone/buttons.less

@@ -164,6 +164,7 @@
     .download-content {
         .inline-block;
         margin-left: -25px;
+        _margin-left:0;
         background-image: url(/media/img/sandstone/buttons/firefox-small.png);
         height: 52px;
         padding: 0 20px 0 65px;
@@ -171,10 +172,6 @@
     }
 }
 
-* html .download-button-small .download-link .download-content {
-    margin-left: 0;
-}
-
 
 // OS detection