Popup Blocker (strict) is a lightweight WebExtension designed specifically for Firefox, aimed at enhancing user experience by preventing unwanted popups. This extension effectively pauses various window-opening requests, allowing users to either accept or deny them. It consolidates multiple requests from the same URL, displaying a badge indicating the total number of requests, which helps users manage their web interactions more efficiently.

The extension supports several blocking methods, including window.open for target[_blank] and iframe submissions. Users can choose to deny, allow, or open requests in a background tab, or redirect the current page to the source of the popup. This flexibility, combined with its straightforward interface, makes Popup Blocker (strict) a valuable tool for anyone looking to maintain focus while browsing.