Web Filtering Extension

Hello Business Users,
 
Since two days I am the happy tester of WSA-EP. 
Although so far everything seems to be working flawlessly and I am pleasantly surprised with the possibilities offered by the management console, I've got a question...
I made the installation of three endpoints with my own policy - the option "Only install the web filtering driver (do not install the web filtering browser addons)" - was set to off. It looks like the Web Shield Threat works, because potentially malicious sites are being blocked, however there is no Filtering Extension installed in any browser and of course I can't see the reputation marks while surfing the net (it works in consumer versions).
So here is my question - does WSA-EP install Webroot Filtering Extension in browsers (GC, IE, FF)?
 
Regards,
 
Mike