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Wipe all sync data from one of the connected coumputers

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I accidentally signed in to the Firefox sync from my office computer which downloaded all of my account information I saved on from my home system. Now, I have disconnected from Firefox sync on my office computer but the data still lives on. Tried using CCleaner tool to clean browser cache but to no help. Please guide me on how to get this cleaned off from my office system.

I accidentally signed in to the Firefox sync from my office computer which downloaded all of my account information I saved on from my home system. Now, I have disconnected from Firefox sync on my office computer but the data still lives on. Tried using CCleaner tool to clean browser cache but to no help. Please guide me on how to get this cleaned off from my office system.

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I don't know of a way to remove data that was added via Sync. For the bookmarks you can restore a JSON backup from before that date. That will replace all current bookmarks, so any you added recently are lost. Make a note or create an HTML backup just in case.

History that got synced is probably impossible to restore especially if you have a large history on the home computer.

In a more recent Windows version you might be able to restore a previous copy of the places.sqlite file, but that isn't possible on XP.

Other data is probably not that much important to justify the effort.