Why has Firefox suddenlhy and permanently stopped working on my MacBook Pro?

Firefox launches and runs for 3-4 seconds, then hangs for 3-4 seconds, then crashes. I have uninstaled and re-installed Firefox "clean" with the same results. I have started in Safe Mode with the same result. I have uninstalled Flash Player, same result. I have downgraded to Flash 10, same result. I am attaching the troubleshooting Information as well as the latest crash report.

We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.
#Open the Finder by clicking the smiley face icon in the dock.
#Navigate to the following directory: ''~ / Library / Application Support / Firefox / Crash reports / submitted''.
#Now, you should see a list of files that contain reports. Click the gear icon in the toolbar (or open the ''View'' menu), then select ''Arrange by'' > ''Creation date'' to get the most recent files at the top of the window.
#Open the most recent 5 files with a text editor and copy the IDs.
#Paste each ID into the reply window on the forums.
Thanks in advance!
You can find more information and troubleshooting steps in the [[Firefox crashes]] article.

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