Thanks. I couldn't see a button for closing the window. Apparently somehow asking for higher magnification of the Firefox window didn't give higher magnificat

Thanks. I couldn't see a button for closing the window. Apparently somehow asking for higher magnification of the Firefox window didn't give higher magnification of the ad window; thus I didn't see the close button. Thanks. With your feedback, I tried again and did see the big X close button outside of the main part of the ad window. The thing did close. Read the article. Cute. Thanks.