After installing Linux on a new piece of hardware, and then setting Firefox to sync with my already established account, now I am seeing that every time I start any of my computers on my home network, any of two Macs and two Linux boxes, I receive the warning that I need to sign in to Sync, and that requires me to confirm the sign-in via email notification. In the past I did not have sign in to sync at the stop of each ffox session. What is going on?? Interestingly, you blocked my ffox support account as well, so I had to reset that password. Please fix your system.