Latest versions of web browsers have build in Pop up blocker, but still few pop ups get through the browser. A free pop up blocker is a good way to prevent pop up. Pop up blocker free edition is a powerful ad blocker. This pop-up blocker features a powerful, yet easy to use, interface which allows quick access to its wide variety of features. Pop-Up Stopper Free supports Internet Explorer, Netscape & Mozilla only.
It can also block Messenger Service and desktop ads. There’s no need to adjust proxy settings or add sites to a list. Pop-Up Stopper will not strip Web images or slow your browser. I case you need to allow pop-up for any website, you need to hold down the CTRL or Shift key.
Pop Up Stopper is a good freeware to prevent pop-up and only limitation is that you cannot add sites to white list, so that pop-ups are not blocked.
Download Pop Up Stopper Free Edition
Though firefox blocks most of the popups, some still pass that and appear. May be these softwares are useful in such cases…