Building a Thunderbird extension 1: introduction - Mozilla | MDNThunderbird is Mozilla's open-source email application. It shares many of the technologies used by Firefox, including JavaScript, the Gecko layout engine, the XUL XML User Interface Language and the XPCOM Cross-Platform Component Object Model. Similar to Firefox, Thunderbird functionality can be enhanced and customized via extensions. Some guidelines for up to TB 60 in tb-planning newsgroup and mo
