+%global _firefox_app_id \{ec8030f7-c20a-464f-9b0e-13a3a9e97384\}
+
+# common macros, yet to be defined. see:
+# https://fedoraproject.org/wiki/User:Kalev/MozillaExtensionsDraft
+%global _moz_extensions %{_datadir}/mozilla/extensions
+%global _firefox_extdir %{_moz_extensions}/%{_firefox_app_id}
+
+# needed for this package
+%global extension_id gssweb@painless-security.com
+%global _our_extdir %{_firefox_extdir}/%{extension_id}