Bug 656779 - Fennec firstrun discovery animation is wrong in RTL [r=wesj]

mobile/themes/core/browser.css

@@ -1436,12 +1436,16 @@ richlistitem.appmenu-downloads-button > image,
 }
 
 /* Sidebar peeking */
-.sidebar[mode="discovery"], #browsers[mode="discovery"] {
+:-moz-any(.sidebar, #browsers)[mode="discovery"] {
   -moz-animation-delay: 1s;
   -moz-animation-duration: 5s;
   -moz-animation-name: sidebardiscovery;
 }
 
+:-moz-any(.sidebar, #browsers)[mode="discovery"]:-moz-locale-dir(rtl) {
+  -moz-animation-name: sidebardiscoveryrtl;
+}
+
 @-moz-keyframes sidebardiscovery {
   from { -moz-transform: translateX(0); }
   10% { -moz-transform: translateX(-moz-calc(121px + @border_width_large@ + 2*@padding_normal@)); }
@@ -1450,3 +1454,12 @@ richlistitem.appmenu-downloads-button > image,
   90% { -moz-transform: translateX(-@sidebar_width_minimum@); }
   to { -moz-transform: translateX(0); }
 }
+
+@-moz-keyframes sidebardiscoveryrtl {
+  from { -moz-transform: translateX(0); }
+  10% { -moz-transform: translateX(-moz-calc(-121px - @border_width_large@ - 2*@padding_normal@)); }
+  45% { -moz-transform: translateX(-moz-calc(-121px - @border_width_large@ - 2*@padding_normal@)); }
+  55% { -moz-transform: translateX(@sidebar_width_minimum@); }
+  90% { -moz-transform: translateX(@sidebar_width_minimum@); }
+  to { -moz-transform: translateX(0); }
+}