Gnome-web (new name for epiphany browser) have a ad-blocking feature, which is by default activated.
But sometimes, I get the impression that elements that are not ads are blocked (false positives), that some ads from a particular country are not blocked. Also, after installing gnome-3.12 from ppa gnome-team/staging, ad-blocking completely stopped working.
What is the principle of the filter implemented in gnome-web ? How can I troubleshoot/debug ad-blocking ? Can I configure the blocking patterns ?