If I have get it right, it seems that when I use Firefox Sync to sync my bookmarks, the same bookmark on different profiles have always the same bookmark.id. At least, If i search for such a bookmark via bookmarks.search() i get the same id string on different profiles/PC’s.
Now I wonder how i could create a new bookmark with bookmarks.create() and use a pre-build string with a id. But allways a new id is generated, instead of using the given id. But how can I create a bookmark with a pre-build id?