I have never enabled Sync or created an account, but after updating today I noticed that I was signed in to a Sync profile. The e-mail address of the Sync profile was the same as a g-mail address that I created while using Firefox on this computer. However, at no point did I ever actually sign into Sync or actively tell Firefox that I wanted to Sync my bookmarks, etc. I have actively told Firefox that I do not want to sync anything from this browser every time it has asked. The Sync account that I was signed in under used the same password as the g-mail account I created, which is incredibly disturbing since I never provided that password to Firefox. That would seem to indicate that Firefox somehow spied on the password I entered when creating a g-mail account, which is NOT acceptable behavior from a browser. Can someone please explain what's going on here? I've never told Sync that I wanted to Sync data, nor have I told Firefox that it could use that log-in information.