mixins.less in railsstrap-3.3.4

- old
+ new

@@ -1,14 +1,16 @@
 // Mixins
 // --------------------------
 
 .fa-icon() {
   display: inline-block;
-  font: normal normal normal 14px/1 FontAwesome; // shortening font declaration
+  font: normal normal normal @fa-font-size-base/1 FontAwesome; // shortening font declaration
   font-size: inherit; // can't have font-size inherit on line above, so need to override
   text-rendering: auto; // optimizelegibility throws things off #1094
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  transform: translate(0, 0); // ensures no half-pixel rendering in firefox
+
 }
 
 .fa-icon-rotate(@degrees, @rotation) {
   filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation);
   -webkit-transform: rotate(@degrees);