Block Flash Ads with CSS

You can block flash ads with a custom Hosts file, and this is a pretty good option because it blocks ads from everywhere. I just found a cool way to block flash ads in Firefox with a little CSS tweak which blocks the ad until you click on it, that way you can choose to see a Flash ad or other Flash object if you want. Pretty cool! Thanks Jesse Ruderman :-)

http://www.squarefree.com/userstyles/xbl.html