I'm trying a new Linux build on a net book that I use for playing with non windows OS. In the process of setting up the fresh OS install I wanted in get my Firefox account set up to that I didn't have to spend lots of time working on that one thing. I'm no stranger to the browser sync and have attached several of my computers and tablets with a number of different OS to the account with little trouble including the Firefox of the previous Linux build that was on the net book. The problem now is that on both of my to main computers, a windows 7 desktop and a windows 8.1 tablet, both running the latest Firefox, I am unable to find the "add device" button in any of the sync management screens. This includes the browsers built in options screen as well as the Firefox manage account page. The first gives me options for disconnecting the account, going to the manage screen, several check boxes for what can be synced, and the device name. The manage screen, after logging in, only give me options for signing out, changing password, and deleting the account. Any help figuring out why the add device button seem to be missing from both these devices would be greatly appreciated.