* [https://donate.mozilla.org/thunderbird/about/ Donate]
Visit [https://support.mozilla.org/questions/thunderbird Thunderbird support forum] to answer user questions. (support.mozilla.org aka SUMO is where users like you are supported by users like you.)* Visit [https://support.mozilla.org/products/thunderbird/ the Knowledge Base (aka KB)] to help improve documentation which users refer to for assistance.* Visit [[Thunderbird:Testing| QA testing]] to help with quality assurance and testing.* Visit [https://developer.mozilla.org/en/Thunderbird_Localization Localization] to help other translators to localize Thunderbird in your language.
* [[Thunderbird/Contributing patches|Contribute patches and fixes]].
* [[Thunderbird/Add-ons Guide 57|Add-ons Guide for Thunderbird 57 and beyond]].