Firefox does not sync to the bookmarks.
I cannot any more bookmark with my laptop (it does not open the selection window for bookmarking), but I can in my other computer. I noticed that my laptop does not sync bookmarks any more (I deleted them in my laptop and there is now none), but the bookmarks are there because I can use and update them with my other computer.
ప్రత్యుత్తరాలన్నీ (1)
I found an error-log (about:sync-log). I could upload it, if I knew where. It's very long.