User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:24.0) Gecko/20130524 Firefox/24.0 (Nightly/Aurora) Build ID: 20130524050555 Steps to reproduce: Tried to use Sync across home-, mobile- and work-device with specific bookmarks, history, logins/passwords and tabs to be synced only on specific devices (e.g. only on my home- and mobile-device, but not on my work-device). Actual results: Sync doesn't offer such capabilities. Instead, it just syncs the same data across all deviced - simply put: there's no profiles-support as yet. Expected results: Sync should offer profiles-support as a minimum. Offering support to chose sync-state of each item would be even better.