Block Unwanted Windows or pop-up On The Web browser!

So many times you open a website are automatically displayed in the windows of such advertising or logos, ring tones and stuff. These windows are referred to unwanted pop-ups. To block one of the solution is to install the Google toolbar free download at http://www.google.com/toolbar/ff/index.html.
The pop-up blocking function can be deactivated by selecting options from the bar and removing the check mark on pop up, and other is Firefox Mozilla addons "FooF" it is pop-up blocker.