33.1 incompatible Firefox with Symantec Endpoint Firewall

This morning, I received a message from Firefox indicating that a new version (33.1) Firefox is available - so I took the auto-update feature. Since the update, I found that Firefox can no longer connect to the internet. Suspect a firewall issue, I disabled firewall Symantec Endpoint and found that Firefox suddenly worked again. Since it is a working PC, I have to keep the active firewall (and I like to do anyway). Symantec does not seem to have any ability to add individual programs as exceptions. We have the ability to allow all IP traffic, or just IP application traffic.
The new Firefox is simply incompatible with Symantec Endpoint? Why the version that I had (33.0.3 if I'm not mistaken) would have worked without problem?
As another detail, I would add that when I click on the handler Extension/add-on in Firefox, I see that protection against vulnerabilities Symantec 12.3.0.3 - 1 is not compatible with Firefox 33.1; I guess that's part of the problem? (And if so, should I contact Symantec?)

Hello! Thank you for your response. Unfortunately, Symantec Endpoint does not allow the user to set individual permissions for applications (even at the level of the administrator). However I solved the problem! I realized that the version of Symantec Endpoint installed on my PC has been 12.4111.4516, and that there is a version more recent (12.5) available. My server of the company does not notify me of new versions of software available - but after I installed 12.5, everything works again. For the other user who also has this problem, even if you do not have access to 12.5, you can see if you can reinstall Symantec Endpoint to see if it works for you.

Tags: Firefox

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