I am pretty sure my ex was logged into his iPhone with my Sync account - I have since changed all passwords and disconnected, but I am wanting to know if I can in fact see what prior devices my firefox was synced to?

I see in my options there is an iOs download as well as an android option, is this just standard as showing up, or does it mean that if I see iOs in here that it was connected at one time to the iPhone? I have all android stuff... so if that is not standard then he really was in my stuff this way....