docs(README): update README to reference MDN docs

README.md

@@ -1,3 +1,22 @@
 # Mozilla's cross-browser testing lab
 
-This repository holds a tutorial intended to help web developers learn how to detect cross-browser issues using Sauce Labs. The tutorial's landing page is in the repository's wiki: https://github.com/mdn/crossbrowser-testing-lab/wiki#mozillas-cross-browser-testing-lab. The repository may eventually contain code samples, other markdown files, or web assets for building a static web site from the content. 
+This repository holds a tutorial intended to help web developers learn how to detect cross-browser issues using Sauce Labs. The tutorial's landing page is in the repository's wiki: https://github.com/mdn/crossbrowser-testing-lab/wiki#mozillas-cross-browser-testing-lab. The repository may eventually contain code samples, other markdown files, or web assets for building a static web site from the content.
+
+# Introduction to Automated Testing on MDN Web Docs
+
+Another great cross-browser tutorial can be found at [Introduction to Automated Testing](https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing/Automated_testing#Using_Sauce_Labs_to_speed_up_browser_testing) on MDN Web Docs.  The tutorial includes
+an introduction to task runners and commercial browser test automation apps to
+help reduce the tedious and error prone nature of manually testing web apps.
+
+# Additional Cross Browser Testing Documentation
+
+For additional cross-browser documentation, please see the
+[Cross Browser Testing Module](https://developer.mozilla.org/en-US/docs/Learn/Tools_and_testing/Cross_browser_testing)
+on MDN Web Docs.
+
+The module includes a number of guides that allow you to explore testing web apps
+across different browsers.  It looks at strategies for identifying your target
+audience, how to approach testing, the main issues faced with different types of
+code and how to mitigate them.  Additionally, the module includes an overview of
+tools that are most useful to help you test and fix problems, and how to use
+automation to speed up your testing.