Many of the steps we did in order to create the extension's installation and registration files will be the same each time. Rather than doing it by hand, you can use [http://ted.mielczarek.org/code/mozilla/extensionwiz/ an on-line wizard] to build a basic extension. The process of developing extensions is greatly improved with the addition of [http://kb.mozillazine.org/Setting_up_extension_development_environment some settings preferences] to the browser, as well as the [http://ted.mielczarek.org/code/mozilla/extensiondev/index.html Extension Developer's extension]. This extension will automate many of the steps described here. It will also allow you to reload the browser's chrome at runtime. This is a great way to test changes to your XUL/JS files without having to restart the browser.