Adblock Plus is a Firefox add-ons which block all the advertise and banner on the page you are browsing. This is realy helpful when you just want to read the website and don’t want to annoyed by all those ads and banners on the internet that often take longer to download than everything else on the page.
Website - http://adblockplus.org/
Support - http://adblockplus.org/forum/
You can either select banners, part of the banner address or a filter to block advertises.