diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 214d67948e8c3..28bd4197b4883 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -2030,6 +2030,15 @@ void RenderWidgetHostImpl::DragTargetDrop(const DropData& drop_data,
                                           base::OnceClosure callback) {
   // TODO(crbug.com/40138933): Replace with a for_frame() check.
   if (blink_frame_widget_) {
+    // === POC INSTRUMENTATION ===
+    for (const auto& ui : drop_data.url_infos) {
+      LOG(ERROR) << "[POC] DragTargetDrop url_infos: " << ui.url.spec();
+    }
+    LOG(ERROR) << "[POC] DragTargetDrop download_metadata: "
+               << (drop_data.download_metadata
+                       ? drop_data.download_metadata->url.spec()
+                       : std::string("<null>"));
+    // ===========================
     DropData drop_data_with_permissions(drop_data);
     GrantFileAccessFromDropData(&drop_data_with_permissions);
     StoragePartitionImpl* storage_partition =
@@ -2975,6 +2984,24 @@ void RenderWidgetHostImpl::StartDragging(
     }
   }
 
+  // === POC INSTRUMENTATION (read-only logging, no behavior change) ===
+  for (const auto& ui : filtered_data.url_infos) {
+    LOG(ERROR) << "[POC] StartDragging filtered_data.url_infos: "
+               << ui.url.spec();
+  }
+  LOG(ERROR) << "[POC] StartDragging filtered_data.download_metadata: "
+             << (filtered_data.download_metadata
+                     ? filtered_data.download_metadata->url.spec()
+                     : std::string("<reset>"));
+  for (const auto& it : drag_data->items) {
+    if (it->is_string()) {
+      LOG(ERROR) << "[POC] StartDragging RAW drag_data item type="
+                 << it->get_string()->string_type << " data="
+                 << base::UTF16ToUTF8(it->get_string()->string_data);
+    }
+  }
+  // ==================================================================
+
   if (frame_tree_) {
     bool intercepted = false;
     devtools_instrumentation::WillStartDragging(