There will be a 4th and likely final Beta for Firefox 6.0, due out towards the middle/end of this week. Firefox 6.0 Beta 4 has been released. Beta 5 will be out sometime next week. No information at this time what bug fixes will be included in this release.

Just Released Thunderbird 6 Beta – July 20th Coming Soon Thunderbird 6 Beta 2 – August 2nd Thunderbird 3.1.12 – August 16th Thunderbird 6 Final Release – August 16th Thunderbird 7 Beta – August 16th Thunderbird 8 Early Bird – August 16th Future Releases Thunderbird 7 Final Release – September 27th Thunderbird 8 Beta – September 27th Thunderbird 9 Early Bird – September 27th * As part of the new Rapid Release Schedule, dates listed for Earlybird and Beta builds reflect when the code merge is to begin. The actual release to that particular channel may vary by several days….

Mozilla Labs will be pushing a second Beta for Thunderbird 6.0 on Tuesday, August 2nd. Bug fixes/patches included in this upcoming release include: The Aero Glass theme has been changed to try and make it easier to read. Bug 658534 (can’t collapse+expand folders).