diff --git a/xulrunner/app/nsXULRunnerApp.cpp b/xulrunner/app/nsXULRunnerApp.cpp
index 7cc993f25875..41bcfd2f7709 100644
--- a/xulrunner/app/nsXULRunnerApp.cpp
+++ b/xulrunner/app/nsXULRunnerApp.cpp
@@ -174,14 +174,6 @@ static void Usage(const char *argv0)
            "  -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"
            "  --install-app <application> [<destination> [<directoryname>]]\n"
            "                             Install a XUL application.\n"
            "\n"