diff --git a/src/plugins/view/htmlrenderer.py b/src/plugins/view/htmlrenderer.py
index 00c808d98..2f2432c07 100644
--- a/src/plugins/view/htmlrenderer.py
+++ b/src/plugins/view/htmlrenderer.py
@@ -398,11 +398,7 @@ class RendererMozilla(Renderer):
                         port = str(port)
                         (lang_country, modifier ) = locale.getlocale()
                         lang = lang_country.split('_')[0]
-                        prefs.write(MOZJS % {
-                                     'host' : host,
-                                     'port' : port,
-                                     'lang' : lang
-                                    } )
+                        prefs.write(MOZJS % vars() )
                     prefs.close()
         except:
             try: # trying to remove pref.js in case of proxy change.