Eles são oficialmente mantidos e distribuídos pelo Thunderbird. Baixe a versão mais recente, a menos que queira testar a versão Beta e relatar erros.
The Daily channel is where development and testing begin, and new features are developed. This is expected to be the least stable channel. Make sure you back up important data regularly.
The Beta channel is where stabilization occurs. This is expected to be more stable than Daily, but not as stable as the Release or Extended Support Release channels. Make sure you back up important data regularly.
The official annual extended support release. This release is intended for users who want all available new features on an annual basis and stability/security fixes on a monthly basis.
The official monthly release. This release is intended for users who want all available new features and bug fixes on a monthly basis.
