Whatever you wanted to do to a browser via the firewall, you could do to the avwebgrd app instead. The end result should be the same.
I'm not sure how effective the web guard app is, so I can't say what is being lost my moving away from it.
Many people think that as long as they stay away from questionable websites and don't click on stuff, they are okay. The problem is, there are people breaking into good websites and installing java exploits inside "normal" web pages. So that "normal" website that you have been visiting for years without any problems could one day become the source of a infection. These java exploits can install stuff without causing UAC to warn the user. A unique ‘fileless’ bot attacks news site visitors - Securelist
"...the exploit uses several different methods to disable UAC (User Account Control). After this the bot can install
If you take the time to read thru that link - don't focus on the "fileless" part and don't take comfort in the fact that you block certain info from coming in. The same exploit can be inside the web page main page.
I've cleaned many a computer that was "protected" with MSE and yet I still install it for a variety of reasons. The folks at Microsoft are slow to list things as bad. I make that statement after years of submitting bad files to virustotal and seeing the time lag between other companies and Microsoft. Also, MSE's heuristics could be better.
See the bottom of this post: smadav 2012 vs other anti-viuses
Uninstall Java and don't surf the net while signed on with admin rights :-)