So far, Epiphany has been using an extension to do the dirty work of blocking the annoying ads. The extension wasn’t working very good actually as sometimes it even blocked entire websites!
Developers decided to completely rewrite the extension from scratch and make it work like it should be but still this wasn’t enough apparently as some users don’t even know that such extension exists. So they decided to integrate it to Web 3.8!
As Xan Lopez writes on his blog:
Rest here