diff --git a/packages/frontend/src/_dev_boot_.ts b/packages/frontend/src/_dev_boot_.ts
index 89509262c2..907e5ce7e7 100644
--- a/packages/frontend/src/_dev_boot_.ts
+++ b/packages/frontend/src/_dev_boot_.ts
@@ -7,11 +7,11 @@
 // よって、devモードとして起動されるときはビルド時に組み込む形としておく。
 // (pnpm start時はpugファイルの中で静的リソースとして読み込むようになっており、この問題は起こっていない)
 import '@tabler/icons-webfont/dist/tabler-icons.scss';
-import { isEmbedPage } from '@/scripts/embed-page.js';
+import { embedPage } from '@/config.js';
 
 await main();
 
-if (isEmbedPage()) {
+if (embedPage) {
 	import('@/_embed_boot_.js');
 } else {
 	import('@/_boot_.js');
diff --git a/packages/frontend/src/account.ts b/packages/frontend/src/account.ts
index beb36c9882..1b4752910f 100644
--- a/packages/frontend/src/account.ts
+++ b/packages/frontend/src/account.ts
@@ -14,7 +14,7 @@ import { apiUrl } from '@/config.js';
 import { waiting, popup, popupMenu, success, alert } from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { unisonReload, reloadChannel } from '@/scripts/unison-reload.js';
-import { isEmbedPage } from '@/scripts/embed-page.js';
+import { embedPage } from '@/config.js';
 
 // TODO: 他のタブと永続化されたstateを同期
 
@@ -23,7 +23,7 @@ type Account = Misskey.entities.MeDetailed & { token: string };
 const accountData = miLocalStorage.getItem('account');
 
 function initAccount() {
-	if (isEmbedPage()) return null;
+	if (embedPage) return null;
 	if (accountData) return reactive(JSON.parse(accountData) as Account);
 	return null;
 }
@@ -85,13 +85,13 @@ export async function signout() {
 }
 
 export async function getAccounts(): Promise<{ id: Account['id'], token: Account['token'] }[]> {
-	if (isEmbedPage()) return [];
+	if (embedPage) return [];
 
 	return (await get('accounts')) || [];
 }
 
 export async function addAccount(id: Account['id'], token: Account['token']) {
-	if (isEmbedPage()) return;
+	if (embedPage) return;
 
 	const accounts = await getAccounts();
 	if (!accounts.some(x => x.id === id)) {
@@ -194,7 +194,7 @@ export async function refreshAccount() {
 }
 
 export async function login(token: Account['token'], redirect?: string) {
-	if (isEmbedPage()) return;
+	if (embedPage) return;
 
 	const showing = ref(true);
 	popup(defineAsyncComponent(() => import('@/components/MkWaitingDialog.vue')), {
diff --git a/packages/frontend/src/config.ts b/packages/frontend/src/config.ts
index 277dfc12aa..2bec5ae262 100644
--- a/packages/frontend/src/config.ts
+++ b/packages/frontend/src/config.ts
@@ -21,6 +21,7 @@ export const version = _VERSION_;
 export const instanceName = siteName === 'Misskey' || siteName == null ? host : siteName;
 export const ui = miLocalStorage.getItem('ui');
 export const debug = miLocalStorage.getItem('debug') === 'true';
+export const embedPage = location.pathname.startsWith('/embed');
 
 export function updateLocale(newLocale): void {
 	locale = newLocale;
diff --git a/packages/frontend/src/local-storage.ts b/packages/frontend/src/local-storage.ts
index 59e7333fbc..95b0165c19 100644
--- a/packages/frontend/src/local-storage.ts
+++ b/packages/frontend/src/local-storage.ts
@@ -47,20 +47,20 @@ const safeSessionStorage = new Map<Keys, string>();
 
 export const miLocalStorage = {
 	getItem: (key: Keys): string | null => {
-		if (isEmbedPage()) {
+		if (embedPage) {
 			return safeSessionStorage.get(key) ?? null;
 		}
 		return window.localStorage.getItem(key);
 	},
 	setItem: (key: Keys, value: string): void => {
-		if (isEmbedPage()) {
+		if (embedPage) {
 			safeSessionStorage.set(key, value);
 		} else {
 			window.localStorage.setItem(key, value);
 		}
 	},
 	removeItem: (key: Keys): void => {
-		if (isEmbedPage()) {
+		if (embedPage) {
 			safeSessionStorage.delete(key);
 		} else {
 			window.localStorage.removeItem(key);
@@ -78,7 +78,7 @@ export const miLocalStorage = {
 	},
 };
 
-if (isEmbedPage()) {
+if (embedPage) {
 	initEmbedPageLocalStorage();
 	if (_DEV_) console.warn('Using safeSessionStorage as localStorage alternative');
 }
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index a85b2875fe..5ea49df20f 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -24,7 +24,7 @@ import MkContextMenu from '@/components/MkContextMenu.vue';
 import { MenuItem } from '@/types/menu.js';
 import copyToClipboard from '@/scripts/copy-to-clipboard.js';
 import { showMovedDialog } from '@/scripts/show-moved-dialog.js';
-import { isEmbedPage } from '@/scripts/embed-page.js';
+import { embedPage } from '@/config.js';
 
 export const openingWindowsCount = ref(0);
 
@@ -173,7 +173,7 @@ export async function popup<T extends Component>(
 	events: ComponentEmit<T> = {} as ComponentEmit<T>,
 	disposeEvent?: keyof ComponentEmit<T>,
 ): Promise<{ dispose: () => void }> {
-	if (isEmbedPage()) return { dispose: () => {} };
+	if (embedPage) return { dispose: () => {} };
 
 	markRaw(component);
 
@@ -633,8 +633,8 @@ export function popupMenu(items: MenuItem[], src?: HTMLElement | EventTarget | n
 }
 
 export function contextMenu(items: MenuItem[], ev: MouseEvent): Promise<void> {
-	if (isEmbedPage()) return Promise.resolve();
-	
+	if (embedPage) return Promise.resolve();
+
 	ev.preventDefault();
 	return new Promise(resolve => {
 		let dispose;
diff --git a/packages/frontend/src/scripts/embed-page.ts b/packages/frontend/src/scripts/embed-page.ts
index f50cf98a74..74d22b05fb 100644
--- a/packages/frontend/src/scripts/embed-page.ts
+++ b/packages/frontend/src/scripts/embed-page.ts
@@ -4,17 +4,14 @@
  */
 import { miLocalStorage } from "@/local-storage.js";
 import type { Keys } from "@/local-storage.js";
-
-export function isEmbedPage() {
-	return location.pathname.startsWith('/embed');
-}
+import { embedPage } from "@/config.js";
 
 /**
  * EmbedページではlocalStorageを使用できないようにしているが、
  * 動作に必要な値はsafeSessionStorage（miLocalStorage内のやつ）に移動する
  */
 export function initEmbedPageLocalStorage() {
-	if (!isEmbedPage()) {
+	if (!embedPage) {
 		return;
 	}
 
diff --git a/packages/frontend/src/scripts/idb-proxy.ts b/packages/frontend/src/scripts/idb-proxy.ts
index 35cf4a885f..d3399073a8 100644
--- a/packages/frontend/src/scripts/idb-proxy.ts
+++ b/packages/frontend/src/scripts/idb-proxy.ts
@@ -10,12 +10,12 @@ import {
 	set as iset,
 	del as idel,
 } from 'idb-keyval';
-import { isEmbedPage } from './embed-page.js';
+import { embedPage } from '@/config.js';
 import { miLocalStorage } from '@/local-storage.js';
 
 const PREFIX = 'idbfallback::';
 
-let idbAvailable = typeof window !== 'undefined' ? !!(window.indexedDB && typeof window.indexedDB.open === 'function' && !isEmbedPage()) : true;
+let idbAvailable = typeof window !== 'undefined' ? !!(window.indexedDB && typeof window.indexedDB.open === 'function' && !embedPage) : true;
 
 // iframe.contentWindow.indexedDB.deleteDatabase() がchromeのバグで使用できないため、indexedDBを無効化している。
 // バグが治って再度有効化するのであれば、cypressのコマンド内のコメントアウトを外すこと
diff --git a/packages/frontend/src/scripts/theme.ts b/packages/frontend/src/scripts/theme.ts
index 60045ac9f0..4075cb36a5 100644
--- a/packages/frontend/src/scripts/theme.ts
+++ b/packages/frontend/src/scripts/theme.ts
@@ -11,7 +11,7 @@ import { globalEvents } from '@/events.js';
 import lightTheme from '@/themes/_light.json5';
 import darkTheme from '@/themes/_dark.json5';
 import { miLocalStorage } from '@/local-storage.js';
-import { isEmbedPage } from '@/scripts/embed-page.js';
+import { embedPage } from '@/config.js';
 
 export type Theme = {
 	id: string;
@@ -96,7 +96,7 @@ export function applyTheme(theme: Theme, persist = true) {
 		document.documentElement.style.setProperty(`--${k}`, v.toString());
 	}
 
-	if (!isEmbedPage()) {
+	if (!embedPage) {
 		document.documentElement.style.setProperty('color-scheme', colorScheme);
 	}
 
diff --git a/packages/frontend/src/stream.ts b/packages/frontend/src/stream.ts
index 2723857e38..41b2a29b68 100644
--- a/packages/frontend/src/stream.ts
+++ b/packages/frontend/src/stream.ts
@@ -8,7 +8,7 @@ import { markRaw } from 'vue';
 import { $i } from '@/account.js';
 import { wsOrigin } from '@/config.js';
 import { StreamMock } from '@/scripts/stream-mock.js';
-import { isEmbedPage } from '@/scripts/embed-page.js';
+import { embedPage } from '@/config.js';
 
 // heart beat interval in ms
 const HEART_BEAT_INTERVAL = 1000 * 60;
@@ -21,7 +21,7 @@ export function useStream(): Misskey.IStream {
 	if (stream) return stream;
 
 	// TODO: No Websocketモードもここで判定
-	if (isEmbedPage()) {
+	if (embedPage) {
 		stream = markRaw(new StreamMock(wsOrigin, null));
 		return stream;
 	} else {