附加组件
要尝试这里成千上万的附加组件，下载 Mozilla Firefox，一个快速、自由的上网工具！
关闭
Developer Assistant 0.3.0.20140917.1-signed.1-signed 需要重开
作者： Ted Mielczarek, Gavin Sharp, Brett Zamir
A suite of tools for developers.
![[警告]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=0f17c866-6635205a)
权限
关于这个附加组件
A suite of tools for extension developers, including an interactive JavaScript shell, HTML and XUL editors with live preview, regular expression and XPath testers, and a tool for packaging extensions.
