diff --git a/content/browser/renderer_host/navigation_request.cc b/content/browser/renderer_host/navigation_request.cc
index 2343aae339b89..6f8a752431540 100644
--- a/content/browser/renderer_host/navigation_request.cc
+++ b/content/browser/renderer_host/navigation_request.cc
@@ -10448,10 +10448,27 @@ bool NavigationRequest::IsFencedFrameRequiredPolicyFeatureAllowed(
 
   // Check if the outer document's permissions policies allow all of the
   // required policies.
+  const network::PermissionsPolicy* embedder_policy =
+      GetParentFrameOrOuterDocument()->GetPermissionsPolicy();
   std::optional<const network::PermissionsPolicy::Allowlist>
-      embedder_allowlist = GetParentFrameOrOuterDocument()
-                               ->GetPermissionsPolicy()
-                               ->GetAllowlistForFeatureIfExists(feature);
+      embedder_allowlist =
+          embedder_policy->GetAllowlistForFeatureIfExists(feature);
+  // --- POC diagnostic logging (not part of any fix) ---
+  bool embedder_actually_allows =
+      embedder_policy->IsFeatureEnabledForOrigin(feature, origin);
+  LOG(ERROR) << "[POC] FF-gate feature=" << static_cast<int>(feature)
+             << " embedder_origin="
+             << GetParentFrameOrOuterDocument()
+                    ->GetLastCommittedOrigin()
+                    .Serialize()
+             << " embedder_allowlist="
+             << (embedder_allowlist
+                     ? (embedder_allowlist->MatchesAll() ? "MatchesAll"
+                                                         : "restricted")
+                     : "nullopt")
+             << " embedder_IsFeatureEnabledForOrigin="
+             << (embedder_actually_allows ? "true" : "false");
+  // ----------------------------------------------------
   if (embedder_allowlist && !embedder_allowlist->MatchesAll()) {
     return false;
   }
@@ -10497,6 +10514,11 @@ bool NavigationRequest::CheckPermissionsPoliciesForFencedFrames(
   // eventually only use the required policies without policy inheritance, so
   // extra policies defined in the outer document/"allow" attribute won't have
   // any effect.
+  LOG(ERROR) << "[POC] CheckPermissionsPoliciesForFencedFrames target_origin="
+             << origin.Serialize() << " required_feature_count="
+             << computed_fenced_frame_properties
+                    ->effective_enabled_permissions()
+                    .size();
   for (const network::mojom::PermissionsPolicyFeature feature :
        computed_fenced_frame_properties->effective_enabled_permissions()) {
     if (!IsFencedFrameRequiredPolicyFeatureAllowed(origin, feature)) {
@@ -10509,9 +10531,12 @@ bool NavigationRequest::CheckPermissionsPoliciesForFencedFrames(
               "Refused to frame '%s' as a fenced frame because permissions "
               "policy '%s' is not allowed for the frame's origin.",
               origin.Serialize().c_str(), feature_string.c_str()));
+      LOG(ERROR) << "[POC] => FF navigation BLOCKED (feature "
+                 << feature_string << " disallowed)";
       return false;
     }
   }
+  LOG(ERROR) << "[POC] => FF navigation ALLOWED (all required features passed)";
   return true;
 }