I do not have another device to sink to. So what do I do?
Additional System Details
- User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_1_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/15.1b14275 Mobile/16D57 Safari/605.1.15
You do not need to create a Firefox Account in order to use the Firefox web browsers whether on one device or multiples.
What the Firefox Account is used for https://support.mozilla.org/en-US/kb/access-mozilla-services-firefox-account
The Sync feature is a option to sync some information between Firefox on two or more devices. It is not meant to be used for backup.