--- a/browser/components/loop/content/shared/css/common.css
+++ b/browser/components/loop/content/shared/css/common.css
@@ -8,17 +8,17 @@
  * "Fixes" the Box Model.
  * @see http://www.paulirish.com/2012/box-sizing-border-box-ftw/
  */
 *, *:before, *:after {
   box-sizing: border-box;
 }
 
 body {
-  font-family: "Lucida Grande", sans-serif;
+  font: message-box;
   font-size: 12px;
   background: #fbfbfb;
 }
 
 img {
   border: none;
 }
 
@@ -360,33 +360,16 @@ p {
 }
 
 .mac p,
 .windows p,
 .linux p {
   line-height: 16px;
 }
 
-/* Using star selector to override
- * the specificity of other selectors
- * if performance is an issue we could
- * explicitely list all the elements */
-.windows * {
-  font-family: 'Segoe';
-}
-
-.mac * {
-  font-family: 'Lucida Grande';
-}
-
-.linux * {
-  /* XXX requires fallbacks */
-  font-family: 'Ubuntu', sans-serif;
-}
-
 /* Web panel */
 
 .info-panel {
   border-radius: 4px;
   background: #fff;
   padding: 20px 0;
   border: 1px solid #e7e7e7;
   box-shadow: 0 2px 0 rgba(0, 0, 0, .03);