Your feedback is essential to the project and makes Thunderbird better with every beta release. Give us your feedback on Thunderbird Beta at our support site.
Submit a Bug
If you notice any problems with Thunderbird Beta, please file a bug using these instructions.
Submit Crash Reports
Please use the Crash Reporter and turn it on when it asks. The Crash Reporter gives us really valuable data on which crashes are the most serious, and how often people encounter them. Click ‘OK’ when the Crash Reporter prompts you to send feedback.