In this chapter, you learned about unit testing your Firefox OS application with the help of QUnit and debugging your application with the help of Firefox's Developer Tools. You studied some of the important tools in depth along with references to the various applications developed in the book. You also learned how to improve application performance, use application validator, and use the Spoof Firefox OS add-on.
In the next chapter, you will learn how to submit your applications to Firefox Marketplace and update applications on the marketplace. You will also study the various review criteria used by Marketplace to review the applications. Finally, you will learn how to publish paid applications to Marketplace, and port existing web applications to Firefox OS.