In some cases, an extension may be installed globally into the installation directory (or into the \browser\extensions folder, in Firefox 21 and above [4]), which enables its use in all profiles for a Mozilla application. Installing a global extension into the installation directory is something an administrator might do, so that the add-on can be used by any user on the machine. It is also possible that another software installation may have included a global extension (for example, the Java JRE installer adds a global extension to Firefox, for the Java Console [5]).