Son had been using the home desk top and firefox without any problems. Had bought a laptop for him to use in school. Use my Windows account to setup the laptop and it imported family settings automatically. On the laptop, I allowed him admin rights. He managed to install his online games and Chrome, but not Firefox. Running Firefox, pop-up it keeps asking to send email to ask for permission to us app. I have allowed it on MS Account, but it does not work. I can use Firefox on the laptop but not my son. Have uninstalled Firefox and reinstalled it again but still does not work. It now has also stopped firefox from running on child account on desktop which before that had worked.