diff --git a/Libraries/LibWeb/IndexedDB/IDBRequest.cpp b/Libraries/LibWeb/IndexedDB/IDBRequest.cpp
index c1d5b58f29b..a2d6f81c5a7 100644
--- a/Libraries/LibWeb/IndexedDB/IDBRequest.cpp
+++ b/Libraries/LibWeb/IndexedDB/IDBRequest.cpp
@@ -9,6 +9,7 @@
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/HTML/EventNames.h>
 #include <LibWeb/IndexedDB/IDBRequest.h>
+#include <LibWeb/IndexedDB/IDBTransaction.h>
 
 namespace Web::IndexedDB {
 
diff --git a/Libraries/LibWeb/IndexedDB/IDBRequest.h b/Libraries/LibWeb/IndexedDB/IDBRequest.h
index e3031a22ccb..796cd4c9dad 100644
--- a/Libraries/LibWeb/IndexedDB/IDBRequest.h
+++ b/Libraries/LibWeb/IndexedDB/IDBRequest.h
@@ -10,7 +10,7 @@
 
 #include <LibWeb/Bindings/IDBRequestPrototype.h>
 #include <LibWeb/DOM/EventTarget.h>
-#include <LibWeb/IndexedDB/IDBTransaction.h>
+#include <LibWeb/IndexedDB/Internal/RequestList.h>
 
 namespace Web::IndexedDB {
 
diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp b/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
index e58115f3edd..0a1d94dc966 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, stelar7 <dudedbz@gmail.com>
+ * Copyright (c) 2024-2025, stelar7 <dudedbz@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -15,15 +15,18 @@ GC_DEFINE_ALLOCATOR(IDBTransaction);
 
 IDBTransaction::~IDBTransaction() = default;
 
-IDBTransaction::IDBTransaction(JS::Realm& realm, GC::Ref<IDBDatabase> database)
+IDBTransaction::IDBTransaction(JS::Realm& realm, GC::Ref<IDBDatabase> connection, Bindings::IDBTransactionMode mode, Bindings::IDBTransactionDurability durability, Vector<GC::Ref<ObjectStore>> scopes)
     : EventTarget(realm)
-    , m_connection(database)
+    , m_connection(connection)
+    , m_mode(mode)
+    , m_durability(durability)
+    , m_scope(move(scopes))
 {
 }
 
-GC::Ref<IDBTransaction> IDBTransaction::create(JS::Realm& realm, GC::Ref<IDBDatabase> database)
+GC::Ref<IDBTransaction> IDBTransaction::create(JS::Realm& realm, GC::Ref<IDBDatabase> connection, Bindings::IDBTransactionMode mode, Bindings::IDBTransactionDurability durability = Bindings::IDBTransactionDurability::Default, Vector<GC::Ref<ObjectStore>> scopes = {})
 {
-    return realm.create<IDBTransaction>(realm, database);
+    return realm.create<IDBTransaction>(realm, connection, mode, durability, move(scopes));
 }
 
 void IDBTransaction::initialize(JS::Realm& realm)
@@ -38,6 +41,8 @@ void IDBTransaction::visit_edges(Visitor& visitor)
     visitor.visit(m_connection);
     visitor.visit(m_error);
     visitor.visit(m_associated_request);
+    visitor.visit(m_scope);
+    visitor.visit(m_cleanup_event_loop);
 }
 
 void IDBTransaction::set_onabort(WebIDL::CallbackType* event_handler)
@@ -70,6 +75,7 @@ WebIDL::CallbackType* IDBTransaction::onerror()
     return event_handler_attribute(HTML::EventNames::error);
 }
 
+// https://w3c.github.io/IndexedDB/#dom-idbtransaction-abort
 WebIDL::ExceptionOr<void> IDBTransaction::abort()
 {
     // 1. If this's state is committing or finished, then throw an "InvalidStateError" DOMException.
@@ -82,4 +88,16 @@ WebIDL::ExceptionOr<void> IDBTransaction::abort()
     return {};
 }
 
+// https://w3c.github.io/IndexedDB/#dom-idbtransaction-objectstorenames
+GC::Ref<HTML::DOMStringList> IDBTransaction::object_store_names()
+{
+    // 1. Let names be a list of the names of the object stores in this's scope.
+    Vector<String> names;
+    for (auto const& object_store : this->scope())
+        names.append(object_store->name());
+
+    // 2. Return the result (a DOMStringList) of creating a sorted name list with names.
+    return create_a_sorted_name_list(realm(), names);
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.h b/Libraries/LibWeb/IndexedDB/IDBTransaction.h
index 14881a69dd0..a7b35fd75e2 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.h
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.h
@@ -1,17 +1,22 @@
 /*
- * Copyright (c) 2024, stelar7 <dudedbz@gmail.com>
+ * Copyright (c) 2024-2025, stelar7 <dudedbz@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #pragma once
 
+#include <AK/Vector.h>
 #include <LibGC/Ptr.h>
 #include <LibWeb/Bindings/IDBDatabasePrototype.h>
 #include <LibWeb/Bindings/IDBTransactionPrototype.h>
 #include <LibWeb/DOM/Event.h>
 #include <LibWeb/DOM/EventTarget.h>
+#include <LibWeb/HTML/EventLoop/EventLoop.h>
 #include <LibWeb/IndexedDB/IDBDatabase.h>
+#include <LibWeb/IndexedDB/IDBRequest.h>
+#include <LibWeb/IndexedDB/Internal/ObjectStore.h>
+#include <LibWeb/IndexedDB/Internal/RequestList.h>
 
 namespace Web::IndexedDB {
 
@@ -30,7 +35,7 @@ class IDBTransaction : public DOM::EventTarget {
 public:
     virtual ~IDBTransaction() override;
 
-    [[nodiscard]] static GC::Ref<IDBTransaction> create(JS::Realm&, GC::Ref<IDBDatabase>);
+    [[nodiscard]] static GC::Ref<IDBTransaction> create(JS::Realm&, GC::Ref<IDBDatabase>, Bindings::IDBTransactionMode, Bindings::IDBTransactionDurability, Vector<GC::Ref<ObjectStore>>);
     [[nodiscard]] Bindings::IDBTransactionMode mode() const { return m_mode; }
     [[nodiscard]] TransactionState state() const { return m_state; }
     [[nodiscard]] GC::Ptr<WebIDL::DOMException> error() const { return m_error; }
@@ -38,6 +43,8 @@ public:
     [[nodiscard]] Bindings::IDBTransactionDurability durability() const { return m_durability; }
     [[nodiscard]] GC::Ptr<IDBRequest> associated_request() const { return m_associated_request; }
     [[nodiscard]] bool aborted() const { return m_aborted; }
+    [[nodiscard]] GC::Ref<HTML::DOMStringList> object_store_names();
+    [[nodiscard]] ReadonlySpan<GC::Ref<ObjectStore>> scope() const { return m_scope; }
 
     void set_mode(Bindings::IDBTransactionMode mode) { m_mode = mode; }
     void set_state(TransactionState state) { m_state = state; }
@@ -59,18 +66,39 @@ public:
     WebIDL::CallbackType* onerror();
 
 protected:
-    explicit IDBTransaction(JS::Realm&, GC::Ref<IDBDatabase>);
+    explicit IDBTransaction(JS::Realm&, GC::Ref<IDBDatabase>, Bindings::IDBTransactionMode, Bindings::IDBTransactionDurability, Vector<GC::Ref<ObjectStore>>);
     virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Visitor& visitor) override;
 
 private:
+    // AD-HOC: The transaction has a connection
     GC::Ref<IDBDatabase> m_connection;
+
+    // A transaction has a mode that determines which types of interactions can be performed upon that transaction.
     Bindings::IDBTransactionMode m_mode;
+
+    // A transaction has a durability hint. This is a hint to the user agent of whether to prioritize performance or durability when committing the transaction.
     Bindings::IDBTransactionDurability m_durability { Bindings::IDBTransactionDurability::Default };
+
+    // A transaction has a state
     TransactionState m_state;
+
+    // A transaction has a error which is set if the transaction is aborted.
     GC::Ptr<WebIDL::DOMException> m_error;
 
+    // A transaction has an associated upgrade request
     GC::Ptr<IDBRequest> m_associated_request;
+
+    // AD-HOC: We need to track abort state separately, since we cannot rely on only the error.
     bool m_aborted { false };
+
+    // A transaction has a scope which is a set of object stores that the transaction may interact with.
+    Vector<GC::Ref<ObjectStore>> m_scope;
+
+    // A transaction has a request list of pending requests which have been made against the transaction.
+    RequestList m_request_list;
+
+    // A transaction optionally has a cleanup event loop which is an event loop.
+    GC::Ptr<HTML::EventLoop> m_cleanup_event_loop;
 };
 }
diff --git a/Libraries/LibWeb/IndexedDB/IDBTransaction.idl b/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
index bba6179e240..c343a328ab3 100644
--- a/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
+++ b/Libraries/LibWeb/IndexedDB/IDBTransaction.idl
@@ -4,10 +4,10 @@
 
 [Exposed=(Window,Worker)]
 interface IDBTransaction : EventTarget {
-    [FIXME] readonly attribute DOMStringList objectStoreNames;
+    readonly attribute DOMStringList objectStoreNames;
     readonly attribute IDBTransactionMode mode;
     readonly attribute IDBTransactionDurability durability;
-    [FIXME, SameObject] readonly attribute IDBDatabase db;
+    [SameObject, ImplementedAs=connection] readonly attribute IDBDatabase db;
     readonly attribute DOMException? error;
     [FIXME] IDBObjectStore objectStore(DOMString name);
     [FIXME] undefined commit();
diff --git a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
index 6708cae50c8..4aa8fc7457d 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
+++ b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, stelar7 <dudedbz@gmail.com>
+ * Copyright (c) 2024-2025, stelar7 <dudedbz@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -312,9 +312,8 @@ GC::Ref<IDBTransaction> upgrade_a_database(JS::Realm& realm, GC::Ref<IDBDatabase
     auto db = connection->associated_database();
 
     // 2. Let transaction be a new upgrade transaction with connection used as connection.
-    auto transaction = IDBTransaction::create(realm, connection);
-
-    // FIXME: 3. Set transaction’s scope to connection’s object store set.
+    // 3. Set transaction’s scope to connection’s object store set.
+    auto transaction = IDBTransaction::create(realm, connection, Bindings::IDBTransactionMode::Versionchange, Bindings::IDBTransactionDurability::Default, Vector<GC::Ref<ObjectStore>> { connection->object_store_set() });
 
     // 4. Set db’s upgrade transaction to transaction.
     db->set_upgrade_transaction(transaction);
diff --git a/Libraries/LibWeb/IndexedDB/Internal/Database.cpp b/Libraries/LibWeb/IndexedDB/Internal/Database.cpp
index e02d0e38c52..cf4f5fd945c 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Database.cpp
+++ b/Libraries/LibWeb/IndexedDB/Internal/Database.cpp
@@ -4,8 +4,10 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibWeb/IndexedDB/IDBTransaction.h>
 #include <LibWeb/IndexedDB/Internal/ConnectionQueueHandler.h>
 #include <LibWeb/IndexedDB/Internal/Database.h>
+#include <LibWeb/IndexedDB/Internal/RequestList.h>
 
 namespace Web::IndexedDB {