- Thunderbird 9 Final Release
- Thunderbird 10 Beta (10.0b1)*
- Thunderbird 11 Earlybird (10.0a2)*
January 31st, 2012
- Thunderbird 10 Final Release
- Thunderbird 11 Beta (11.0b1)*
- Thunderbird 12 Earlybird (12.0a2)*
* 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.