how to set proxy for epiphany on elementary os

when I surf the internet on elementary, I'd like to use firefox in domestic net, and use epiphany to google, but I must skip the wall.

When I set proxy on firefox, it is easy to do. I just need to make my settings by preferences->proxy settings, firefox offers the function for users to do these settings. But epiphony doesn't.

I find an answer by google.

Given Epiphany is an integral part of Gnome, it uses the Gnome-wide system preferences.
You can tell all applications on your system to use this tunnel through Gnome’s network-proxy interface. It is located under System>Preferences>Network Proxy.

but on elementary, it is located under system settings -> network -> proxy. just finish your proxy settings there, and epiphony will use the system settings as its proxy settings. Look, now, I can google by epiphony.

google_by_epiphony.png