Fixed select element appearance in firefox

css/style.css

@@ -1538,6 +1538,7 @@ input.userMenu-search-field:focus::-ms-input-placeholder {
     background: #fff;
     transition: background-color 100ms linear;
 }
+@media screen and (-webkit-min-device-pixel-ratio:0) { 
     .login .module select, .optionsPage select{
         height: 30px;
         font: 13px/24px "Open sans";
@@ -1558,7 +1559,7 @@ input.userMenu-search-field:focus::-ms-input-placeholder {
         text-overflow: '';
     /* end */
     }
-
+}
 .login .module span.availability {
     margin-left: 10px;
     font: italic 16px "Open sans";