1. When I sync machine A with machine B, I assume entries that are different are copied to the server AND then duplicated to the machine that did not have it.  Q:  Is the item that determines the uniqueness the NAME or the URL?

Machines are Win10 and Win 11. Current FF = 107.0.2 I have several PC's, previously NOT synced. All have overlapping bookmarks - some unique, others the same. My question has to do ONLY with bookmarks. My main concern is how to do this across multiple different machines - not all online at the same time - and NOT LOSE DATA! 1. When I sync machine A with machine B, I assume entries that are different are copied to the server AND then duplicated to the machine that did not have it. Q: Is the item that determines the uniqueness the NAME or the URL? 2. For entries common to both machines: copied to server, left alone on both machine. Q: To be considered the same - do they need to have both same NAME and Url? 3a. Same name but different url? What happens? 3b Same url but different name? What happens? ............................ Now assume we have 2 synced machines with identical bookmarks. What are the rules / priority sequence concerning the data interactions (specifically deletion ) when one machine is offline and the other adds / deletes a bookmark, and the offline machine has made some additions and deletions before it comes back online (eg. signed in) TIA. Clifton