Add-ons
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Developer Assistant 0.3.0.20140917.1-signed.1-signed Requires Restart
by Ted Mielczarek, Gavin Sharp, Brett Zamir
A suite of tools for developers.
![[Warning]](https://addons-stage.thunderbird.net/static/img/developers/test-warning.png?b=f7f5719b-69bc56b1)
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About this Add-on
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.
