diff --git a/Casks/firefox.rb b/Casks/firefox.rb
new file mode 100644
index 000000000..7e4dc611a
--- /dev/null
+++ b/Casks/firefox.rb
@@ -0,0 +1,5 @@
+class Firefox < Cask
+  url 'http://releases.mozilla.org/pub/mozilla.org/firefox/releases/11.0/mac/en-US/Firefox%2011.0.dmg'
+  homepage 'http://www.mozilla.org/en-US/firefox/'
+  version '11.0'
+end