JavaScript Terminal For Firefox
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Terminal for Firefox

Warning: the addon is being integrated into Firefox natively. It is no longer supported.

This Firefox addon contains full-featured console that supports JS, CoffeeScript and LiveScript.

Info and screencast are available at To switch between languages, use :js, :coffee & :livescript. The language you choose will be saved for the next console session.



Drag’n’drop .xpi on your Firefox.

If you prefer stable versions, you can install the addon from