To clean up, try this: First, disconnect the Desktop from your Firefox account. That account should only be used in installations of Firefox you want to share data with your laptop. IMPORTANT: when disconnecting, do NOT clear all the data. Second, on the Desktop, try restoring bookmarks from the last automatic backup. The following article has the steps: [[Restore bookmarks from backup or move them to another computer]]. Third, on the laptop, try restoring bookmarks from ''its'' last automatic backup. There is some possibility that Sync will try to override you with the combined set, but hopefully not. Success?