Safari sidebar silently loads all your bookmarks

Safari was inactive, in the background, with no windows open, when out of the blue I got a Little Snitch alert: Safari wanted to connect to the URL http://192.168.0.1/favicon.ico for some reason. The IP address 192.168.0.1 is private . I quickly realized that http://192.168.0.1/ was one of my bookmarks, for the web interface of my router. I had recently been looking at my bookmarks in order to…