Mozilla Firefox has many add-on services on blocking unwanted adverts on webpage, but Adblock Plus for Mozilla Firefox is definitely one of the most efficient and intelligent application. As this is just an Add-on application, this software can be installed on a system as standalone application. This software needs to be installed inside Mozilla Firefox Browser through Add-on section installer. This application automatically detects adverts on any webpage opened in Mozilla Firefox Internet Browser and then automatically blocks them on the page. Instead of the adverts it just shows a Red Cross or stop button on the adverts section. It also keeps a whitelist and black list of adverts on its own.