As I said, your computer, your choice but certainly not mine and not something I would recommend any one else to follow.
Point taken Bob, but I survived for years without a URL filter and I employ various forms of browser hardening. In my experience URL filters (including Avast!'s) can cause problems and produce false positives. The beautiful thing about Avast! is that I can easily activate the URL filter when and if I decide I need it. Admittedly when I originally installed Avast! on this computer I was a bit overzealous in my attempt to pare it down to a useful light AV, when I originally didn’t install the file shield, but I have now ameliorated that. I ran MSE for over three years on this custom built Win 7 box without any infection and AFAIK that doesn’t have an integral URL filter. A URL filter is only one line in a defence strategy and I employ alternatives. With bloatware removed Avast! is a light and highly capable AV and it is nice to be given the choice of a custom install. I’m sure I’ll survive without a URL filter for the time being. 
"A URL filter is only one line in a defence strategy "
Since 85% of all infections come directly from the internet, it’s also the most important part of your defense.
Again, Your Computer Your Choice. Not my choice and not something I would ever recommend to any one else.
At this point, the topic has been beaten to death. You do what you want and I’ll continue to recommend what’s safe. 
Yes, but Bob, you’re assuming that a URL filter is that effective at stopping the interesting and perhaps arbitrary figure of 85% infections, and it isn’t. I have other browser hardening filters employed and after four years of surfing with this particular computer without an infection I feel perfectly safe without a URL filter. I’m not recommending to anybody else, it’s just that I personally don’t need it. All I wanted was a light bloat-free AV with a proven efficacy. I have that with my custom install of Avast!.