diff --git a/dom/file/uri/BlobURLInputStream.cpp b/dom/file/uri/BlobURLInputStream.cpp
index 9ad8a92798ea..f5a854c9e1c7 100644
--- a/dom/file/uri/BlobURLInputStream.cpp
+++ b/dom/file/uri/BlobURLInputStream.cpp
@@ -375,7 +375,8 @@ void BlobURLInputStream::RetrieveBlobData(const MutexAutoLock& aProofOfLock) {
     if (!BlobURLProtocolHandler::GetDataEntry(
             mBlobURLSpec, getter_AddRefs(blobImpl), loadingPrincipal,
             triggeringPrincipal, loadInfo->GetOriginAttributes(),
-            agentClusterId, true /* AlsoIfRevoked */)) {
+            loadInfo->GetInnerWindowID(), agentClusterId,
+            true /* AlsoIfRevoked */)) {
       NS_WARNING("Failed to get data entry principal. URL revoked?");
       return;
     }
@@ -407,7 +408,8 @@ void BlobURLInputStream::RetrieveBlobData(const MutexAutoLock& aProofOfLock) {
   contentChild
       ->SendBlobURLDataRequest(mBlobURLSpec, triggeringPrincipal,
                                loadingPrincipal,
-                               loadInfo->GetOriginAttributes(), agentClusterId)
+                               loadInfo->GetOriginAttributes(),
+                               loadInfo->GetInnerWindowID(), agentClusterId)
       ->Then(
           GetCurrentSerialEventTarget(), __func__,
           [self](const BlobURLDataRequestResult& aResult) {
diff --git a/dom/file/uri/BlobURLProtocolHandler.cpp b/dom/file/uri/BlobURLProtocolHandler.cpp
index 1e227f906d69..a6c3c9526e50 100644
--- a/dom/file/uri/BlobURLProtocolHandler.cpp
+++ b/dom/file/uri/BlobURLProtocolHandler.cpp
@@ -737,7 +737,7 @@ nsresult BlobURLProtocolHandler::GenerateURIString(nsIPrincipal* aPrincipal,
 bool BlobURLProtocolHandler::GetDataEntry(
     const nsACString& aUri, mozilla::dom::BlobImpl** aBlobImpl,
     nsIPrincipal* aLoadingPrincipal, nsIPrincipal* aTriggeringPrincipal,
-    const OriginAttributes& aOriginAttributes,
+    const OriginAttributes& aOriginAttributes, uint64_t aInnerWindowId,
     const Maybe<nsID>& aAgentClusterId, bool aAlsoIfRevoked) {
   MOZ_ASSERT(NS_IsMainThread(),
              "without locking gDataTable is main-thread only");
@@ -778,6 +778,18 @@ bool BlobURLProtocolHandler::GetDataEntry(
   if (StaticPrefs::privacy_partition_bloburl_per_agent_cluster() &&
       aAgentClusterId.isSome() && info->mAgentClusterId.isSome() &&
       NS_WARN_IF(!aAgentClusterId->Equals(info->mAgentClusterId.value()))) {
+    nsAutoString localizedMsg;
+    AutoTArray<nsString, 1> param;
+    CopyUTF8toUTF16(aUri, *param.AppendElement());
+    nsresult rv = nsContentUtils::FormatLocalizedString(
+        nsContentUtils::eDOM_PROPERTIES, "BlobDifferentClusterError", param,
+        localizedMsg);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return false;
+    }
+
+    nsContentUtils::ReportToConsoleByWindowID(
+        localizedMsg, nsIScriptError::errorFlag, "DOM"_ns, aInnerWindowId);
     return false;
   }
 
diff --git a/dom/file/uri/BlobURLProtocolHandler.h b/dom/file/uri/BlobURLProtocolHandler.h
index 66f24e01c3b9..46c31b9154d5 100644
--- a/dom/file/uri/BlobURLProtocolHandler.h
+++ b/dom/file/uri/BlobURLProtocolHandler.h
@@ -75,6 +75,7 @@ class BlobURLProtocolHandler final : public nsIProtocolHandler,
                            nsIPrincipal* aLoadingPrincipal,
                            nsIPrincipal* aTriggeringPrincipal,
                            const OriginAttributes& aOriginAttributes,
+                           uint64_t aInnerWindowId,
                            const Maybe<nsID>& blobAgentClusterId,
                            bool aAlsoIfRevoked = false);
 
diff --git a/dom/ipc/ContentParent.cpp b/dom/ipc/ContentParent.cpp
index 3e47037f09e8..f62b5cc9c80c 100644
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -7196,7 +7196,7 @@ PFileDescriptorSetParent* ContentParent::SendPFileDescriptorSetConstructor(
 mozilla::ipc::IPCResult ContentParent::RecvBlobURLDataRequest(
     const nsCString& aBlobURL, nsIPrincipal* aTriggeringPrincipal,
     nsIPrincipal* aLoadingPrincipal, const OriginAttributes& aOriginAttributes,
-    const Maybe<nsID>& aAgentClusterId,
+    uint64_t aInnerWindowId, const Maybe<nsID>& aAgentClusterId,
     BlobURLDataRequestResolver&& aResolver) {
   RefPtr<BlobImpl> blobImpl;
 
@@ -7204,8 +7204,8 @@ mozilla::ipc::IPCResult ContentParent::RecvBlobURLDataRequest(
   // longer exists (due to the 5 second timeout) when execution reaches here
   if (!BlobURLProtocolHandler::GetDataEntry(
           aBlobURL, getter_AddRefs(blobImpl), aLoadingPrincipal,
-          aTriggeringPrincipal, aOriginAttributes, aAgentClusterId,
-          true /* AlsoIfRevoked */)) {
+          aTriggeringPrincipal, aOriginAttributes, aInnerWindowId,
+          aAgentClusterId, true /* AlsoIfRevoked */)) {
     aResolver(NS_ERROR_DOM_BAD_URI);
     return IPC_OK();
   }
diff --git a/dom/ipc/ContentParent.h b/dom/ipc/ContentParent.h
index bd2d9f5cb599..23b69566cde1 100644
--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@@ -724,7 +724,7 @@ class ContentParent final
   mozilla::ipc::IPCResult RecvBlobURLDataRequest(
       const nsCString& aBlobURL, nsIPrincipal* pTriggeringPrincipal,
       nsIPrincipal* pLoadingPrincipal,
-      const OriginAttributes& aOriginAttributes,
+      const OriginAttributes& aOriginAttributes, uint64_t aInnerWindowId,
       const Maybe<nsID>& aAgentClusterId,
       BlobURLDataRequestResolver&& aResolver);
 
diff --git a/dom/ipc/PContent.ipdl b/dom/ipc/PContent.ipdl
index 7682f85e1b18..0fcc049a9c6a 100644
--- a/dom/ipc/PContent.ipdl
+++ b/dom/ipc/PContent.ipdl
@@ -1721,6 +1721,7 @@ parent:
                              nsIPrincipal aTriggeringPrincipal,
                              nsIPrincipal aLoadingPrincipal,
                              OriginAttributes aOriginAttributes,
+                             uint64_t aInnerWindowId,
                              nsID? aAgentClusterId)
       returns (BlobURLDataRequestResult aResult);
 
diff --git a/dom/locales/en-US/chrome/dom/dom.properties b/dom/locales/en-US/chrome/dom/dom.properties
index 99cbbcbe9e84..3c467d4bf90d 100644
--- a/dom/locales/en-US/chrome/dom/dom.properties
+++ b/dom/locales/en-US/chrome/dom/dom.properties
@@ -411,3 +411,5 @@ ExternalProtocolFrameBlockedNoUserActivation=Iframe with external protocol was b
 MultiplePopupsBlockedNoUserActivation=Opening multiple popups was blocked due to lack of user activation.
 # LOCALIZATION NOTE: %S is the URL of the preload that was ignored.
 PreloadIgnoredInvalidAttr=Preload of %S was ignored due to unknown “as” or “type” values, or non-matching “media” attribute.
+# LOCALIZATION NOTE: %S is the blob URL. Don't translate "agent cluster".
+BlobDifferentClusterError=Cannot access blob URL “%S” from a different agent cluster.