Removing select arrow..

..in FF and preparing for when browsers will support this unprefixed

library/scss/modules/_forms.scss

@@ -117,6 +117,8 @@ textarea {
 // selects
 select {
   -webkit-appearance: none; /* 1 */
+  -moz-appearance: none;
+  appearance: none;
   // Base64 encoded little arrow
   background-image: url(data:image/png;base64,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);
   background-repeat: no-repeat;