Congratulations! You've downloaded or compiled a Daily build of Thunderbird. These are the builds that contain the latest additions and changes to Thunderbird.

The QA Team Needs You

Help our QA team improve this version of Thunderbird, see our wiki for more details

Submit a Bug

If you notice any problems, please file a bug using these instructions.

Submit Crash Reports

Please use the Crash Reporter when Daily crashes. It gives us valuable data on the most serious crashes and how people encounter them. 'Tell Mozilla' must be checked, and add a comment before you click 'Restart' or 'Quit'. An email address is also useful if we need to contact you for more details.

Give Feedback

You can send us feedback using this form.

More Ways to Help

Get Involved! You don't have to be technical and being involved is good for people wanting to get more familiar with Thunderbird.