Try updating Threat Fire to a newer version or uninstall it.
  Note: If you have both Threat Fire and Avast software installed, see this article.
It's slow, hard to get at, and insecure as insecure can be.Note: Some versions of Mc Afee Site Advisor are already on the Add-ons Blocklist.  The NVIDIA Network Access Manager, an optional application for network security included with some NVIDIA products, can cause Firefox to crash unexpectedly.The system should be restarted after the Bid Defender update to insure that the program is using the updated files.   Bit Guard software by Media Tech Soft Inc.