08 October 2014, I created a Firefox account, and included the synchronization of bookmarks. Then repeatedly re-installed Firefox and successfully used the sync, returning bookmarks in a new program. Today 14 December 2014, I reinstalled on my computer Windows and re-set the Firefox browser. Turning again sync, I noticed that the bookmarks are not recovered. What could be the problem? Where can I find in a Yandex account Firefox folder with bookmarks synchronized before? Thanks in advance for the help.