Sites and apps similar to PopupTest include Popup Blocker (strict), which is free and open source. Other options are Better Pop Up Blocker and Pop Block Pro. In total there are three Ad Blockers like PopupTest for Mac, Windows, Linux and Android.
Popup Blocker (strict) is a lightweight extension to prevent websites from opening popups. The extension pauses all sort of window opening requests for user attention. You can either accept or deny a request. Multiple unique requests are shown in an array.
Better Pop Up Blocker improves the default pop up blockers for Google Chrome and Apple Safari by blocking pop up windows opened by javascript, & other annoyances like alert, prompt, and confirm boxes.
Pop Block Pro is a Chrome browser extension that is available from the Google Chrome Webstore. The extension provides blocking for popups and popunders opened by javascript and other methods that are missed by the Google Chrome popup blocker.
