diff --git a/brightray/browser/network_delegate.cc b/brightray/browser/network_delegate.cc
index a065a6ebf0..9d586d72cf 100644
--- a/brightray/browser/network_delegate.cc
+++ b/brightray/browser/network_delegate.cc
@@ -112,6 +112,10 @@ bool NetworkDelegate::OnCanEnablePrivacyMode(
   return false;
 }
 
+bool NetworkDelegate::OnFirstPartyOnlyCookieExperimentEnabled() const {
+  return true;
+}
+
 bool NetworkDelegate::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
     const net::URLRequest& request,
     const GURL& target_url,
diff --git a/brightray/browser/network_delegate.h b/brightray/browser/network_delegate.h
index fcfbdbb892..55835622ac 100644
--- a/brightray/browser/network_delegate.h
+++ b/brightray/browser/network_delegate.h
@@ -62,6 +62,7 @@ class NetworkDelegate : public net::NetworkDelegate {
   bool OnCanEnablePrivacyMode(
       const GURL& url,
       const GURL& first_party_for_cookies) const override;
+  bool OnFirstPartyOnlyCookieExperimentEnabled() const override;
   bool OnCancelURLRequestWithPolicyViolatingReferrerHeader(
       const net::URLRequest& request,
       const GURL& target_url,