These are officially maintained and distributed by Thunderbird. Download the latest Release version unless you wish to test the Beta version and report bugs.
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 that 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.
