Uncheck the box next to Block pop-up windows to disable the pop-up blocker altogether.Click the menu button and select Settings. In the Menu bar at the top of the screen, click Firefox and select Preferences.To allow specific websites to use pop-ups, while still blocking all others, you can add those specific websites to the list of allowed sites.īlocking pop-ups doesn't always work: Although Firefox blocks most pop-ups, some websites may show pop-ups using uncovered methods, even when they are blocked. Blocking all pop-ups disables such features. Don't show this message when pop-ups are blockedīlocking pop-ups may interfere with some websites: Some websites, including some banking sites, use pop-ups for important 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?.Update theĭisplayError function to handle the error message as you see fit. This solution for popup blocker checking has been tested in FF (v11), So the first one is blocked, and the second one is not. The difference is that Firefox treats a timeout of 2000ms or less are acceptable, but after it – removes the “trust”, assuming that now it’s “outside of the user action”.
…And this works in Firefox too: // open after 1 seconds The popup opens in Chrome, but gets blocked in Firefox. But what is the popup opens in setTimeout? If the code is directly in an onclick handler, then that’s easy. If you think about it, that’s a bit tricky. Most browsers block popups if they are called outside of user-triggered event handlers like onclick. So now most browsers try to block popups and protect the user. A bad page could open tons of popup windows with ads. In the past evil sites abused popups a lot. As of now, there are other ways to do that: JavaScript is able to send requests for server, so popups are rarely used. The initial idea was to show another content without closing the main window.
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