The Mozilla Crash Reporter sends Thunderbird crash information to a collection system. Thunderbird developers use this information to make future versions of Thunderbird crash less frequently. (The Mozilla Crash Reporter comes up because Thunderbird crashes; it does not cause Thunderbird to crash.)
For suggestions on how to prevent Thunderbird from crashing, see Thunderbird Crashes.
After Thunderbird crashes, the Mozilla Crash Reporter window should be displayed. The crash has not been submitted to Mozilla until you click Quit or Restart. To help developers, you must submit the crash report. It is helpful to submit all your crashes, with an email address so developers can reach you if needed. Also, provide your crash report ID in your support and bug postings.
Tell Mozilla about this crash so they can fix it: If this box is checked, the Mozilla Crash Reporter will send crash data to Mozilla. Uncheck this box if you don't want to send the report.
Details...: Shows some details that will be submitted with crash data. These "details" are not enough for developers. Developers need your crash report that is submitted by enabling "Tell Mozilla ..." and then clicking Quit or Restart.
Add a comment: Use this box to write details about what you were doing when Thunderbird crashed. Note: the comments you provide are public and can be read by anyone.
Allow Mozilla to contact me about this report: Check this box if you are willing to receive emails from Mozilla should they need more information from you about this crash, or have important information for you. Enter your email address in the next field. Note: Mozilla will not contact you automatically. They will contact you only if follow up is needed.
Enter your email address here: The email address to be used if you chose above to help our development staff get information and reproduce this crash.
Quit Thunderbird: Submit the crash report and close the dialog, but don't start Thunderbird.
Restart Thunderbird: Submit the crash report and close the dialog, and start Thunderbird.
If Thunderbird crashes again on startup, see Thunderbird Crashes for suggestions on how to prevent Thunderbird from crashing. Also, please submit all your crashes.
Skip to Viewing reports outside of Thunderbird if you can't start Thunderbird. If you can start Thunderbird, to view your crash reports:
If you don't get a crash report, see If you don't get a crash report described later in this article.
You can find crash information in the Crash Reports folder on your computer without starting Thunderbird. The folder contains two subfolders, pending and submitted. submitted contains reports that have been submitted to and received by the crash report database. Each file represents one report. pending contains files that have not been received by the crash report database. There are two files for each crash, one is the crash dump, and one is the crash details.
File names in the submitted folder contain crash IDs and these IDs are what a developer may request when investigating a problem related to your crash. The crash report ID is the portion of the file name without the file extension.
Windows Vista/Windows 7
Mac OS X Crash reports are stored in ~/Library/Thunderbird/Crash Reports/submitted/
Linux Crash reports are stored in ~/.thunderbird/Crash Reports/submitted/
If you don't get a crash report either because crash reporter failed or it doesn't work with your OS or distribution, you can get a stacktrace by using How to get a stacktrace for a bug report.