On Mon, Feb 06, 2017 at 12:02:25PM +0100, Ricardo Wurmus wrote:
> Epiphany comes with an ad blocker extension that can be enabled in the
> settings.  When starting epiphany, however, the following message can be
> seen on VT1:
> 
> ** (WebKitWebProcess:12345): WARNING **: Error retrieving adblock filter: Operation not supported
> 
> In fact, Epiphany does not store any filter list anywhere and as a
> result no ads are blocked.

Epiphany's ad blocker is now working for me on GuixSD with GNOME and a
foreign distro.