Thunderbird:Extensions

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Mozilla Add-ons

Thunderbird Add-ons at addons.mozilla.org is great way to start browsing Thunderbird extensions.

Writing An Extension

See the Introduction and the Guide to MailExtensions for help with writing extensions.

Better extension APIs

New APIs are planned at the Thunderbird:Extensions:Needed_APIs page.

STEEL

STEEL, by jminta, stands for a proposed Scriptable Thunderbird Easy Extension Library, a FUEL-like set of interfaces to facilitate Thunderbird extension development.