diff --git a/firefox.rb b/firefox.rb
new file mode 100755
index 0000000..8ba8851
--- /dev/null
+++ b/firefox.rb
@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+system "firefox https://www.koeki-prj.org/jd/home/"
diff --git a/ruby.rb b/ruby.rb
new file mode 100755
index 0000000..7c666b7
--- /dev/null
+++ b/ruby.rb
@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+# -*- coding: utf-8 -*-
+
+system "ruby sample-hello.rb"