diff --git a/packages/frontend-plugin-api/api-report.md b/packages/frontend-plugin-api/api-report.md
index dcd2cbda4b..d3c02bfc1e 100644
--- a/packages/frontend-plugin-api/api-report.md
+++ b/packages/frontend-plugin-api/api-report.md
@@ -593,7 +593,8 @@ export function createSignInPageExtension<
   TConfig extends {},
   TInputs extends AnyExtensionInputMap,
 >(options: {
-  id: string;
+  namespace?: string;
+  name?: string;
   attachTo?: {
     id: string;
     input: string;
@@ -605,7 +606,7 @@ export function createSignInPageExtension<
     config: TConfig;
     inputs: Expand<ExtensionInputValues<TInputs>>;
   }) => Promise<ComponentType<SignInPageProps>>;
-}): Extension<TConfig>;
+}): ExtensionDefinition<TConfig>;
 
 // @public
 export function createSubRouteRef<
diff --git a/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.test.tsx b/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.test.tsx
index 93efadb0e1..ca95fad7bc 100644
--- a/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.test.tsx
@@ -25,14 +25,15 @@ describe('createNavLogoExtension', () => {
   it('creates the extension properly', () => {
     expect(
       createNavLogoExtension({
-        id: 'test',
+        name: 'test',
         logoFull: <div>Logo Full</div>,
         logoIcon: <div>Logo Icon</div>,
       }),
     ).toEqual({
-      $$type: '@backstage/Extension',
-      id: 'test',
-      attachTo: { id: 'core.nav', input: 'logos' },
+      $$type: '@backstage/ExtensionDefinition',
+      kind: 'nav-logo',
+      name: 'test',
+      attachTo: { id: 'core/nav', input: 'logos' },
       disabled: false,
       inputs: {},
       output: {
diff --git a/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.tsx b/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.tsx
index 5cfff81a9d..878764bad7 100644
--- a/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.tsx
+++ b/packages/frontend-plugin-api/src/extensions/createNavLogoExtension.tsx
@@ -21,14 +21,17 @@ import { coreExtensionData, createExtension } from '../wiring';
  * @public
  */
 export function createNavLogoExtension(options: {
-  id: string;
+  name?: string;
+  namespace?: string;
   logoIcon: JSX.Element;
   logoFull: JSX.Element;
 }) {
-  const { id, logoIcon, logoFull } = options;
+  const { logoIcon, logoFull } = options;
   return createExtension({
-    id,
-    attachTo: { id: 'core.nav', input: 'logos' },
+    kind: 'nav-logo',
+    name: options?.name,
+    namespace: options?.namespace,
+    attachTo: { id: 'core/nav', input: 'logos' },
     output: {
       logos: coreExtensionData.logoElements,
     },
diff --git a/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.test.tsx b/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.test.tsx
index 964941e213..d8835ae788 100644
--- a/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.test.tsx
@@ -23,13 +23,13 @@ import { coreExtensionData, createExtension } from '../wiring';
 describe('createSignInPageExtension', () => {
   it('renders a sign-in page', async () => {
     const SignInPage = createSignInPageExtension({
-      id: 'test',
+      name: 'test',
       loader: async () => () => <div data-testid="sign-in-page" />,
     });
 
     createExtensionTester(
       createExtension({
-        id: 'dummy',
+        name: 'dummy',
         attachTo: { id: 'ignored', input: 'ignored' },
         output: {
           element: coreExtensionData.reactElement,
diff --git a/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.tsx b/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.tsx
index f869ed8f13..8709403407 100644
--- a/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.tsx
+++ b/packages/frontend-plugin-api/src/extensions/createSignInPageExtension.tsx
@@ -19,10 +19,10 @@ import { ExtensionBoundary } from '../components';
 import { PortableSchema } from '../schema';
 import {
   createExtension,
-  Extension,
   ExtensionInputValues,
   AnyExtensionInputMap,
   createExtensionDataRef,
+  ExtensionDefinition,
 } from '../wiring';
 import { Expand } from '../types';
 import { SignInPageProps } from '@backstage/core-plugin-api';
@@ -39,7 +39,8 @@ export function createSignInPageExtension<
   TConfig extends {},
   TInputs extends AnyExtensionInputMap,
 >(options: {
-  id: string;
+  namespace?: string;
+  name?: string;
   attachTo?: { id: string; input: string };
   configSchema?: PortableSchema<TConfig>;
   disabled?: boolean;
@@ -48,12 +49,12 @@ export function createSignInPageExtension<
     config: TConfig;
     inputs: Expand<ExtensionInputValues<TInputs>>;
   }) => Promise<ComponentType<SignInPageProps>>;
-}): Extension<TConfig> {
-  const { id } = options;
-
+}): ExtensionDefinition<TConfig> {
   return createExtension({
-    id,
-    attachTo: options.attachTo ?? { id: 'core.router', input: 'signInPage' },
+    kind: 'sign-in-page',
+    namespace: options?.namespace,
+    name: options?.name,
+    attachTo: options.attachTo ?? { id: 'core/router', input: 'signInPage' },
     configSchema: options.configSchema,
     inputs: options.inputs,
     disabled: options.disabled,