Hey there, I have reinstalled my OS (Win10-64bit) and after installing Firefox and login to Firefox Sync nothing happens. I can manage my devices in the settings and send tabs between all of them (including the newly installed OS) but neither my bookmarks nor my addons nor anything else is synced. What I tried so far: - I deinstalled Firefox several times with geek uninstaller and deleted the remaining directories \AppData\Local\Mozilla, \AppData\LocalLow\Mozilla and \AppData\Roaming\Mozilla. - Reinstalled AdobeFlash - Remove obsolete devices (the two remaining devices are up to date) Here is the sync-log: https://pastebin.com/hPWEZcUN Does anybody have an idea what I'm doing wrong. I did reinstall my OS a lot of times and Sync always worked fine except for this time. Many thanks in advance.