Mozilla Crash Reporter

Revision Information
  • Revision id: 126764
  • Created:
  • Creator: Tonnes
  • Comment: if you crash -> if Firefox crashes
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: Chris_Ilias
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: No
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Revision Content

The Mozilla Crash Reporter dialog box appears when Firefox closes unexpectedly and lets you submit a crash report to developers, to make future Firefox versions crash less often. This article describes how it works and shows you how to access your crash reports.

When Firefox crashes

After Firefox crashes, the Mozilla Crash Reporter window will appear.

Crash Reporter

Tell Mozilla about this crash so they can fix it: If this box is checked, the Mozilla Crash Reporter will send a summary of the crash to Mozilla. Deselect this box if you don't want to send the report to Mozilla.

Details…: Will open the "Report Contents" window, where you can view the technical details of the crash.

Crash Reporter Details

Add a comment (comments are publicly visible): Use this box to add any further information that might be useful to developers trying to find the cause of the crash. The comments you post may be read by anyone.

Include the address of the page I was on: When checked, the information you send to Mozilla will include the web page you visited before the crash.

Allow Mozilla to contact me about this report: Check this box if you would be willing to receive emails from the development staff should they need followup information from you about this crash. (You may also receive an email after your crash has been processed, with support information.)

Enter your email address here: If you chose to help our development staff get information and reproduce this crash, provide the email address you wish to be contacted at here.

Quit Firefox: Close the dialog and don't start Firefox again.

Restart Firefox: Start Firefox again. Firefox will give you the option to open the windows and tabs you had open before the crash. If Firefox crashes again after choosing to restore your windows and tabs, one of the pages you were on is causing the crash. In this case, choose Start New Session.

Viewing crash reports

To view your crash reports from within Firefox:

  1. In the address bar, type about:crashes and press EnterReturn. A list of links to your crash reports will appear.


  2. Click on a link to view the report.


Viewing reports outside of Firefox

If you can't use the above method because Firefox crashes when it starts, you can also view the reports in files on your computer with the following steps:

  1. Open the Charms and select Search.
  2. Search for Run in Apps.
  3. Select Run in the search results and you will be taken to the Desktop with the Run app open.
  4. In the Run app, type %APPDATA%\Mozilla\Firefox\Crash Reports\ and press Enter.
  1. Open the Windows Start menu.
  2. In the search box, type %APPDATA%\Mozilla\Firefox\Crash Reports\ and press Enter.
  1. Open the Windows Start menu, then choose Run….
  2. In the Run dialog, type %APPDATA%\Mozilla\Firefox\Crash Reports\ and press Enter.

Crash reports are stored in ~/Library/Application Support/Firefox/Crash Reports/ (show hidden folders, on Mac OS X 10.7 and above, by holding down the Option key while opening the Go menu in Finder and then selecting Library).

Crash reports are stored in ~/.mozilla/firefox/Crash Reports/

The Crash Reports folder will contain two subfolders: pending and submitted. The submitted folder contains text files for each crash report submitted, with each file containing a crash report ID. For example, a file named bp-031b02bb-26b6-4168-ac0e-2de492090531.txt will contain the following text:
Crash ID: bp-031b02bb-26b6-4168-ac0e-2de492090531
You can go to and copy the Crash ID into the search field to view the report.

Getting help with crash reports

To use your crash report to get help with your Firefox problem, see Firefox crashes - Troubleshoot, prevent and get help fixing crashes.