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Developer Assistant 0.3.0.20140917.1-signed.1-signed 需要重新啟動
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)
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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.
