Fix dir attribute for the extension

extensions/firefox/tools/l10n.js

@@ -94,21 +94,16 @@
     // get a localized string
     get: translateString,
 
-    // get|set the document language and direction
-    get language() {
-      return {
-        // get|set the document language (ISO-639-1)
-        get code() { return gLanguage; },
+    // get the document language
+    getLanguage: function() { return gLanguage; },
 
     // get the direction (ltr|rtl) of the current language
-        get direction() {
+    getDirection: function() {
       // http://www.w3.org/International/questions/qa-scripts
       // Arabic, Hebrew, Farsi, Pashto, Urdu
       var rtlList = ['ar', 'he', 'fa', 'ps', 'ur'];
       return (rtlList.indexOf(gLanguage) >= 0) ? 'rtl' : 'ltr';
     }
   };
-    }
-  };
 })(this);