diff -r f8c7aa251782 -r fe17d4bac785 devtools/cwwindmill.py
--- a/devtools/cwwindmill.py	Thu Jul 29 15:18:31 2010 +0200
+++ b/devtools/cwwindmill.py	Thu Jul 29 14:46:29 2010 +0200
@@ -92,6 +92,8 @@
             # see windmill.bin.admin_options.Firebug
             import windmill
             windmill.settings['INSTALL_FIREBUG'] = 'firebug'
+            windmill.settings['MOZILLA_PLUGINS'].append('/usr/share/mozilla-extensions/')
+            windmill.settings['MOZILLA_PLUGINS'].append('/usr/share/xul-ext/')
 
         self.windmill_shell_objects['start_' + self.browser]()
         self.windmill_shell_objects['do_test'](self.test_dir,