Firefox won't even open. As soon as I try to open it, it sends me a crash report.

It just started this morning. I booted up and did a system restore, due to something I had done inadvertently a couple weeks ago that was driving me buggy. When firefox wouldn't start, I did an 'undo system restore'...but it still wouldn't start. I have tried at least 7-8 times this morning. My son was on another computer in the house at the same time, and was running firefox with no problem.
HELP! Please!

Hi,
Please try reinstalling Firefox over the current installation. You can also take a [https://support.mozilla.org/en-US/kb/Backing%20up%20your%20information?s=backup&r=1&e=sph&as=s backup] of the personal data files first. The personal data are stored in a different location from the [http://kb.mozillazine.org/Installation_directory Firefox Installation Location.]
[http://kb.mozillazine.org/Profile_folder_-_Firefox Personal Folder & Data]
[https://www.mozilla.org/en-US/firefox/new/ Firefox Latest]

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