Comment 9 for bug 139543

this is not fix committed - yet.

We will now ship a /etc/xulrunner-1.9/ubuntu-greprefs.js file where administrators can add their general.config.filename gre setting.

You can the use either an absolute path that will apply for _all_ xulrunner applications or a relative path, which will be relative to the application install directory.

For instance it should be possible to set sysprefs/my-firefox.cfg, which then could be configured by the administrator in /etc/firefox-3.0/pref/