We're sorry to hear that Firefox is crashing. In order to assist you better, please follow the steps below to provide us crash IDs to help us learn more about your crash.

The crash report is several pages of data. We need the report numbers to see the whole report.

1. Enter about:crashes in the Firefox address bar and press Enter. A Submitted Crash Reports list will appear, similar to the one shown below.
2. Copy the 5 most recent Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

More information and further troubleshooting steps can be found in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

bp-f12fa3b0-2274-4a8e-b3b4-18d542161022 10/22/2016 9:43 AM bp-94ea1348-5586-4b6b-81f0-78e772161022 10/22/2016 9:31 AM bp-bab6f8a0-acb7-4efc-8955-12d232161021 10/21/2016 2:10 PM bp-aee957ff-d94f-495f-a223-e5a632161021 10/21/2016 1:34 PM bp-7c635299-065d-447f-b334-cf5b22161018 10/18/2016 8:52 AM bp-62399a64-12d6-46c4-8b23-e494a2161017

Signature: shutdownhang | mozilla::CondVar::Wait | nsEventQueue::GetEvent | nsThread::ProcessNextEvent | NS_ProcessNextEvent | mozilla::dom::workers::RuntimeService::Cleanup

IPSEng32.dll = Symantec Intrusion Detection

This is for Sumo's Related Bugs 1267692 NEW --- crash in shutdownhang | WaitForSingleObjectEx | WaitForSingleObject | PR_WaitCondVar | nsThread::ProcessNextEvent | NS_ProcessNextEvent | mozilla::dom::workers::RuntimeService::Cleanup

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

yes. Below still pops up even after I start in Safe Mode. "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system."

Use these links to create a new profile. Use this new profile as is. Is the problem still there?

http://kb.mozillazine.org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder

https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible