I’m quite puzzeled: Centos 7 contains the same software as RedHat so knowing that Red Hat is one of the forces behind Gnome one would expect to find Web, the browser once known as Epiphany to be installed or at least installable on it.
As I discoverede reading Gnome 3 on CentOS 7 – How I Made It Lovely and Usable a piece from 2014, you must install the package directly from Fedora packages, as in
sudo yum install http://mirror.internode.on.net/pub/fedora/linux/releases/22/Everything/x86_64/os/Packages/e/epiphany-3.16.1-1.fc22.x86_64.rpm http://mirror.internode.on.net/pub/fedora/linux/releases/22/Everything/x86_64/os/Packages/e/epiphany-runtime-3.16.1-1.fc22.x86_64.rpm
well, I felt like being cast in the 90ties. Actually I shouldn’t have done it on my work desktop.