What is a good free internet web blocker?

As we know that the above mentioned companies generate maximum of their revenues by using AD's on their sites. What if most people start installing Ad Blocker plugin in whichever browser they are using. Will it affect the revenues of such internet giants...

All she does is use Facebook and play stupid and senseless games. I have sucessfully blocked facebook ( using "The Web Blocker" very good software! ) but now I fear that she may start viewing aldult content or something like that....What to...

I'm using IE to develop some web pages just on my local machine, and I'd like to disable the Active Content blocker to speed up my development. I know it's not safe to browse without it, but I'm not using IE to surf the internet, I'm only using it for...

Browser hangs up in going from page to page necessitating my using the refresh button to proceed in a timely manner--without using the refresh button, eventually the next web page will load but it does so way too slow--- am trying to figure out if it...

What do you use to block ads when you browse the internet? Does it ever erroneously block sites? Does it cost much, does it have special features? I'm looking for something to scrub the web clean - any/all platforms - without blocking innocent third...

Sometimes when I click a link nothing happens. I've tried the ctrl & click option, but that only works for some links. Some web pages load looking odd & not as up to date. when refining searches on sites like ebay I cat click anything at all...