Firefox won't start, but possible to troubleshoot as compatibility. how can I fix this without running compatibility?

2014 April 29, Firefox works fine but April 30 it won't start, the possible to work is running compatibility (troubleshoot). Is there any solution for this without running compatibility or without formatting computer? And works during 2014 April 29.
I've already uninstall anti virus
I try also restore and repair windows
I've also uninstall and reinstall firefox.
still doesn't work :(

If you had an update of Firefox, the firewall may be the problem. 
This problem occurs when your Internet security program was set to trust the
previous version of Firefox, but no longer recognizes your updated version as
trusted. Now how to fix the problem: To allow Firefox to connect to the Internet
again: 
* Make sure your Internet security software is up-to-date (i.e. you are running the latest version) 
* Remove Firefox from your program's list of trusted or recognized programs, then add it back. For detailed instructions, see Configure firewalls so that Firefox can access the Internet.

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BOILERPLATE TEXT:
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Pizza98704

Firefox won't start, but possible to troubleshoot as compatibility. how can I fix this without running compatibility?

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