Complex sentence: Epiphany 1.9.4 continued the developmental branch on 2 January 2006, followed by 1.9.5.1 and 1.9.6 on 31 January 2006, which replaced libnm-glib with NetworkManager directly via DBUS instead.
Split into simpler sentences: Epiphany 1.9.4 continued the developmental branch on 2 January 2006. This was followed by 1.9.5.1 and 1.9.6 on 31 January 2006, this last iteration of which replaced libnm-glib with NetworkManager directly via DBUS instead.