"  --install-app <application> [<destination> [<directoryname>]]\n" "                             Install a XUL application.\n"
static void Usage(){    // display additional information (XXX make localizable?)    Output(PR_FALSE,           "Mozilla XULRunner %s\n\n"           "Usage: " XULRUNNER_PROGNAME " [OPTIONS]\n"           "       " XULRUNNER_PROGNAME " APP-FILE [APP-OPTIONS...]\n"           "\n"           "OPTIONS\n"           "      --app                  specify APP-FILE (optional)\n"           "  -h, --help                 show this message\n"           "  -v, --version              show version\n"           "  --gre-version              print the GRE version string on stdout\n"           "  --register-global          register this GRE in the machine registry\n"           "  --register-user            register this GRE in the user registry\n"           "  --unregister-global        unregister this GRE formerly registered with\n"           "                             --register-global\n"           "  --unregister-user          unregister this GRE formely registered with\n"           "                             --register-user\n"           "  --find-gre <version>       Find a GRE with version <version> and print\n"           "                             the path on stdout\n"           "\n"           "APP-FILE\n"           "  Application initialization file.\n"           "\n"           "APP-OPTIONS\n"           "  Application specific options.\n",           GRE_BUILD_ID);}