Firefox 2.0.0.17 - No Info
Firefox 3.0.2 - No Info
Firefox 3.1a1 -Released July 28th
Firefox 3.1b1 - August 2008
Thunderbird 2.0.0.17 - No Info
Thunderbird 3.0a2 - Handed off to builds on July 16th. Next stage would be RC for en-US builds, but no scheduling information available at this time