Thunderbird 60 and Thunderbird 52

Wayne Mery vseerror at
Sun Jun 17 21:43:02 UTC 2018

We are planning to build and release 60 beta 8 this week.
And hopefully a 60.0 soon to follow.

If you haven't yet tested 60 you can get it from - in non-English language if 
you like.

If you know of an add-on that doesn't work in 60, please inform the 
author at the add-'on's *support *site or *support *email address (not 
AMO), and list it at if it 
is not already cited there.

On 5/16/2018 9:07 AM, Wayne Mery wrote:
> Folks have been awaiting information about new releases, specifically 
> Thunderbird 60.0, 52.8.0 and 52.9.0, and your patience is appreciated 
> as we work to improve the quality of these releases.  Below is an 
> approximate outline and order of our plans for the next few months:
> * release 52.8.0
> * release 60.0b7, and 60.0b8 if needed, using Taskcluster build 
> infrastructure [1]
> * release 52.8.1 for security updates that were not ready for 52.8.0
> * release 60.0 for manual updates only [2] (June)
> * release 60.1.0 and 52.9.0 (July)
> * release 60.2.0 and end of life for 52 (September)
> These items intentionally do not have dates associated with them. 
> Months are listed to help you plan, but we will release only when the 
> code is ready.
> 52.8.0 has been delayed from last week because of build issues (that 
> is, not code) which we expect to overcome in the next few days. 52.8.0 
> and any point releases will include efail and other security fixes. 
> The 52.x release series will end with 52.9.x.
> Thunderbird 60.0 has not been released yet (even though Firefox 60 ESR 
> has released) because there are important issues still to be resolved, 
> for example dictionary compatibility. You can download the beta from 
> if you haven't yet 
> tested it. Use the links found on the new beta start page (alt+home) 
> to give feedback, which will be appreciated. (Note - Thunderbird 60 
> will not initially have the Policy Engine that is a major feature of 
> Firefox 60 ESR.)
> Thank you for using Thunderbird. Check the ways you can be involved to 
> make Thunderbird better by visiting the new 
> page.
> [1] Taskcluster is a new continuous integration and deployment system 
> that Mozilla is already using for Firefox. Thunderbird nightly builds 
> are currently running on Taskcluster. But our current release builds 
> are running on Buildbot, which Firefox Release Engineering would like 
> to turn off as soon as possible. To avoid keeping Buildbot around for 
> another 42 weeks, we’d like to complete the Taskcluster migration now, 
> before we release 60.0.
> [2] Manual updates of 60.0 will be the initial update mode, as we 
> often do for a new release, because of the breadth of fixes and 
> improvements. Manual-only updates (and updates via downloads) allows 
> us to do a slow rollout to users, to get more user feedback than is 
> possible during the beta period. Automatic updates will be enabled 
> when we are satisfied that we have sufficient numbers of users and a 
> sufficient level of quality - a process that typically takes some weeks.
> _______________________________________________
> tb-planning mailing list
> tb-planning at

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