This is Firefox on a desktop PC or on Android?? ''Desktop PC'' If you get voices speaking to you from a web page that wants some kind of authentication, it sounds like a scam. Try pressing the Esc key several times in a row to halt a two-box authentication popup. If you have a huge pop-up with an OK button at the bottom that keeps coming back, look for a checkbox in the lower right to indicate that you do not want any more dialogs from this page or site, then click OK once and it should then be possible to close the tab. Any improvement?