Creating applications with Mozilla Mozilla is not just a browser. Mozilla is also a framework that allows developers to create cross platform applications. Creating Applications with Mozilla provides step by step information about how you can create your own programs using Mozillas framework. After installing Mozilla you quickly learn to create simple applications. After the initial satisfaction of developing your own portable applications the book branches into topics on modular development and packaging your application. In order to build more complex applications coverage of XUL JavaScript and CSS allow you to discover how to customize and build out your application shell.