Bug 331225 - "prefwindow/prefpane does not work in xulrunner". r=bsmedberg.

toolkit/content/widgets/preferences.xml

@@ -747,7 +747,16 @@
         <![CDATA[
           var psvc = Components.classes["@mozilla.org/preferences-service;1"]
                                .getService(Components.interfaces.nsIPrefBranch);
-          return psvc.getBoolPref("browser.preferences.animateFadeIn");
+#ifdef XP_MACOSX
+          var animate = true;
+#else
+          var animate = false;
+#endif
+          try {
+            animate = psvc.getBoolPref("browser.preferences.animateFadeIn");
+          }
+          catch (e) { }
+          return animate;
         ]]>
         </getter>
       </property>