Create an add-on to Firefox, Thunderbird or other Mozilla-based applications (such as Fennec or SeaMonkey). Fill-in the basic information and pick you features.

Build a full-blown Mozilla-based application based on XULRunner. Fill-in the basic information and pick you features.

Create an XPCOM component for use with Mozilla-based add-ons or applications. Use the generic template or pick from several pre-built component types.

Create an add-on for Songbird. Fill-in the basic information and pick you features.

Create Feathers for Songbird. Fill-in the basic information and begin building your feathers.