refactor

app/helpers/application_helper.rb

@@ -7,6 +7,10 @@ module ApplicationHelper
     raw(wordbreaked_string)
   end
 
+  def pro_fontawesome_enabled?
+    request.domain =~ /donmai\.us/
+  end
+
   def nav_link_to(text, url, **options)
     klass = options.delete(:class)