I have sync set up on my PC with a username, password and recovery key. I have installed firefox on my android phone and wish to sync to the desktop. On the desktop system I select sync and pair a device and it asks me for the code from the phone When I select sync from the settings menu on the phone it asks me to log in to an account it does not give me the code. I have tried setting up an account from the phone however having done this it still does not offer me a code. How can I get the code to put into my desktop system? Thanks.