Diễn đàn hỗ trợ Firefox

For many years, I have paid my telephone bill on-line using Firefox. Suddenly, I can on longer access <frontier.com> using Firefox. Chrome works find using the very same URL. But once inside the home page for Frontier, I can no longer login using Firefox. Grateful for any help. Thanks Email removed for privacy reasons

I am trying to use whatsApp web on my laptop but i don't know how to connect it with my phone. I need step by step guidance to scan the QR code and link my account