Blocking all pop-ups disables such features. When you click either the Options Preferences button in the info bar or the icon in the address bar, a menu is displayed with the following choices:

When blocking a pop-up, Firefox displays an information bar (if it hasn’t been previously dismissed – see below), as well as an icon in the address bar. Pop-up blocking is turned on by default, so you don't have to worry about enabling it to prevent pop-ups from appearing in Firefox. Some pop-ups open on top of the current Firefox window, while others appear underneath Firefox (pop-unders).įirefox allows you to control both pop-ups and pop-unders in Firefox Settings They vary in size, but usually don't cover the whole screen. Pop-up windows, or pop-ups, are windows that appear automatically without your permission. 3.3 Is the pop-up shown after a mouse click or a key press?.3.2 Is the pop-up blocker on and enabled for this site?.