diff --git a/chromium_src/storage/browser/blob/blob_url_store_impl.cc b/chromium_src/storage/browser/blob/blob_url_store_impl.cc
index dbe8cd41ad0c..3c2b9cf6cec1 100644
--- a/chromium_src/storage/browser/blob/blob_url_store_impl.cc
+++ b/chromium_src/storage/browser/blob/blob_url_store_impl.cc
@@ -14,6 +14,8 @@
 namespace storage {
 
 void BlobURLStoreImpl::Resolve(const GURL& url, ResolveCallback callback) {
+  // If a URL is not mapped to the current `storage_key_`, it's likely stored
+  // with a different StorageKey (partitioned) and should not be resolved.
   if (registry_ && !registry_->IsUrlMapped(url, storage_key_)) {
     std::move(callback).Run(mojo::NullRemote(), std::nullopt);
     return;
@@ -26,6 +28,8 @@ void BlobURLStoreImpl::ResolveAsURLLoaderFactory(
     const GURL& url,
     mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver,
     ResolveAsURLLoaderFactoryCallback callback) {
+  // If a URL is not mapped to the current `storage_key_`, it's likely stored
+  // with a different StorageKey (partitioned) and should not be resolved.
   if (registry_ && !registry_->IsUrlMapped(url, storage_key_)) {
     std::move(callback).Run(std::nullopt, std::nullopt);
     return;
@@ -39,6 +43,8 @@ void BlobURLStoreImpl::ResolveForNavigation(
     const GURL& url,
     mojo::PendingReceiver<blink::mojom::BlobURLToken> token,
     ResolveForNavigationCallback callback) {
+  // If a URL is not mapped to the current `storage_key_`, it's likely stored
+  // with a different StorageKey (partitioned) and should not be resolved.
   if (registry_ && !registry_->IsUrlMapped(url, storage_key_)) {
     std::move(callback).Run(std::nullopt);
     return;