This might coincide with a possible missing save or end-step (bug 961184). The state of the checkboxes (Bookmarks, History, Passwords, Open Tabs) is not preserved. On sign-in, check thoses boxes, and then close the window, return to 'Configure your Firefox Account' and see the checkboxes are unchecked again.
This should be fixed by Bug 965366, which just landed on s-c.
Status: NEW → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → FIXED
Status: RESOLVED → VERIFIED
status-firefox29: affected → verified
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