- Thunderbird ESR 10.0.11
- Thunderbird ESR 17.0
- Thunderbird 17
- Thunderbird 18 Beta (18.0b1)*
- Thunderbird 19 Earlybird (19.0a2)*
Early/Mid January 2013
- Thunderbird ESR 10.0.12 (EOL)
- Thunderbird ESR 17.0.1
- Thunderbird 18
- Thunderbird 19 Beta (19.0b1)*
- Thunderbird 20 Earlybird (20.0a2)*
EOL – End of Life, this build version will no longer be supported after this release.
* As part of the new Rapid Release Schedule,dates listed for Earlybird and Beta builds reflect when the code merge is set to begin. The actual release to that particular channel may vary by several days. See the Wiki for more details.