I have several different devices that seem to all lose the ability to sync (mostly bookmarks are obvious since those change much more often than anything else I'm syncing). I try manual sync and that occasionally works but at least once a month or so I have to disconnect a device and reconnect it to my FireFox account. Is there a log to review for this sort of thing? Is there a good way to tell which device is failing to sync (i.e. is one failing to upload something or is another one failing to download that info?) Thanks!