hello Sarah.Hopkins, yes you're right - if you have just paired one device to sync you'd currently need these three components in order to access the data in your sync account again in case something goes wrong: the '''username''', the '''password '''& the '''recovery key''' generated during the original setup of the account (you're prompted to print it/save it/write it down while setting it up). in case you have all those three pieces of information available, you can go to ''firefox > options > sync > set-up sync > i have an account > i don't have the device with me'' in order to link firefox to your account. in case it's of any consolation to you, the sync service is currently in the process of being overhauled to become more user-friendly anyway: https://wiki.mozilla.org/User_Services/Sync