Does ZoneAlarm browser security let me install a browser plug-in or PDF reader?

Does ZoneAlarm browser security let me install a browser plug-in or PDF reader?

ZoneAlarm browser security catches, in its virtual file system, programs that attempt to install themselves in your Web browser without your permission. But, sometimes you may want to install a toolbar and it will install silently and appear to be uninvited. In this case, ZoneAlarm browser security may treat it like a drive-by download and block it. This can happen with an ActiveX or PDF reader program.

However, ZoneAlarm browser security recognizes and allows many common ActiveX programs, such as common search engine toolbar. At the same time, is not aware of all safe ActiveX programs. To install less common plug-ins in your Web browser you may need to open an unprotected browser to install the plug-in. See Opening an Unprotected Browser Window in Turning ZoneAlarm Browser Security On and Off.