User Guide

Blocking Internet
advertisements
Many Web sites are using more aggressive techniques to draw attention to
the ads on their pages. Some have begun using larger, more prominent ads,
while others rely on ad windows that appear when you enter or leave the
site. Along with increasing the amount of time that it takes to display Web
pages, some ads contain offensive content, cause software conflicts, or use
HTML tricks to open additional browser windows.
Ad Blocking helps avoid these problems. When Ad Blocking is active,
Norton Personal Firewall transparently removes:
1 Ad banners
1 Pop-up and pop-under ads
1 Macromedia Flash-based ads
How Ad Blocking works
Norton Personal Firewall detects and blocks ads based on two criteria: their
dimensions and their locations.
Blocking by dimensions
Most online advertisers use one or more standard sizes for their ads.
Norton Personal Firewall now includes the ability to block images, Flash
animations, and other HTML elements that have the same dimensions as
these common ad sizes.