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+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+
+# Marionette Transport Layer
+
+[Marionette](https://developer.mozilla.org/en/Marionette) is a 
+Mozilla project to enable remote automation in Gecko-based projects,
+including desktop Firefox, mobile Firefox, and Firefox OS.   It's inspired
+by [Selenium Webdriver](http://www.seleniumhq.org/projects/webdriver/).
+
+This package defines the transport layer used by a Marionette client to
+communicate with the Marionette server embedded in Gecko.  It has no entry
+points; rather it's designed to be used by Marionette client implementations.