Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
The most significant change Nautilus 3.9.3 brings, is the port of Nautilus Sidebar in GtkPlacesSidebar Widget (Removal of nautilus-places-sidebar.c).
GtkPlacesSidebar is a widget that displays a list of frequently-used places in the file system: the user’s home directory, the user’s bookmarks, and volumes and drives. This widget is used as a sidebar in GtkFileChooser and may be used by file managers and similar programs.