spmug 602 Gatekeeping for Pop-Ups Q. Is there a way to temporarily override the function that blocks pop-up windows in my Web browser to browse sites that legitimately use pop-ups? A. Most Web browsers - including Internet Explorer, Firefox and Safari - now include a function that blocks the pesky pop-up and pop-under windows favored by advertisers. This feature can cause problems, however, with sites like banks that sometimes use the extra windows for certain functions. Check your browser's settings or preferences area for the pop-up blocker function. On many versions of Internet Explorer or Firefox, you can choose to allow pop-ups only from certain sites - and have the browser block the rest. In the Safari browser for Mac OS X, you can quickly turn pop-up blocking off or on with a keyboard shortcut (Command-K) when you get to a site that uses pop-ups you want to see.