Enable popup blocking from 4 different browsers
Enable popup blocking from Microsoft Internet Explorer. To navigate to the popup blocker, click Tools → Options → Privacy, and then check the "Block pop-ups" option.
Enable popup blocking from Google Chrome. Google Chrome should automatically block popups as a default setting, but you can make sure that the setting is enabled by clicking the Chrome menu, then clicking Settings → Show advanced settings → Content settings, and then checking the "Do not allow any site to show pop-ups" option.
Enable popup blocking from Apple Safari. Open Safari, and then click Safari → Preferences → Security. Select the "Block pop-up windows” option.
Enable popup blocking from Mozilla Firefox. Like many other browsers, popup blocking should come already enabled. If, for whatever reason it isn't, navigate to Firefox → Preferences → Content, and then press the "Block pop-up windows" option.