pythonimus, This is a great question, can you please file a bug on [bugzilla.mozilla.com] with this information: Description of order it should sync or proposed solution to defualt order: A test case with steps you took: Example: PC A Ubuntu bookmarks html file, and windows bookmarks html file, sync accounts and result html file of bookmarks or screenshots of each before and after? Please let me know if you need help with this, it will help other users as well. Thank you!