The Advanced tab
contains settings that apply to all of the security zones. We recommend that
you disable the Enable third-party browser extensions option.
This option includes toolbars and Browser Helper Objects (BHOs). While some
add-ons can be useful, they also have the ability to violate your privacy. For
example, a browser add-on may monitor your web browsing habits, or even change
the contents of web pages in an attempt to gather personal information.