What Is NortonInternetSecurityBF?

When I visit a website (for example usatodaydotcom) a message pops up.  It asks:  ”Do you want to trust the website “www.usatoday  dot com” to use the “NortonInternetSecurityBF” plug-in?”  Further, it says:  “You can manage which websites you trust to use this plug-in in the Security pane of Safari preferences.”  

In Safari preferences, I am given the option to:  “Allow websites to use this plug-in …”

BUT there is this caveat at the bottom of that little window:

“‘NortonInternetSecurityBF’ does NOT support the highest level of security for Safari plug-ins.

Websites using this plug-in may be able to access your personal documents and data.”

MY PROBLEM:  Is the caveat telling me that:

  1. I am safer to “Allow websites to use this plug-in …”, or
  2. I am reducing my level of security if I allow websites to use the plug-in?

I have searched the Norton Support Community, and anywhere else I could find, and I cannot get a clear picture of just what NortonInternetSecurityBF does when it is allowed, and whether I am safer to allow (or NOT allow) a website to use it.

PLEASE HELP?

[Edit: broke link to website to conform with the Participation Guidelines and Terms of Service]