diff --git a/mozilla/xpfe/bootstrap/nsAppRunner.cpp b/mozilla/xpfe/bootstrap/nsAppRunner.cpp
index c2e72a6f009..f43149cab3f 100644
--- a/mozilla/xpfe/bootstrap/nsAppRunner.cpp
+++ b/mozilla/xpfe/bootstrap/nsAppRunner.cpp
@@ -745,6 +745,9 @@ static nsresult HandleArbitraryStartup( nsICmdLineService* cmdLineArgs, nsIPref
         rv = LaunchApplicationWithArgs((const char *)(argv[i]),
                                        cmdLineArgs, command,
                                        height, width, windowOpened);
+        if (rv == NS_ERROR_NOT_AVAILABLE) {
+          return rv;
+        }
       }
     }
   }