diff --git a/packages/frontend-embed/assets/dummy.png b/packages/frontend-embed/assets/dummy.png
new file mode 100644
index 0000000000..39332b0c1b
Binary files /dev/null and b/packages/frontend-embed/assets/dummy.png differ
diff --git a/packages/frontend-embed/src/components/EmAvatar.vue b/packages/frontend-embed/src/components/EmAvatar.vue
index d3601b0ab4..9e97818b8c 100644
--- a/packages/frontend-embed/src/components/EmAvatar.vue
+++ b/packages/frontend-embed/src/components/EmAvatar.vue
@@ -6,7 +6,6 @@ SPDX-License-Identifier: AGPL-3.0-only
 <template>
 <component :is="link ? EmA : 'span'" v-bind="bound" class="_noSelect" :class="[$style.root, { [$style.cat]: user.isCat }]" @click="onClick">
 	<EmImgWithBlurhash :class="$style.inner" :src="url" :hash="user.avatarBlurhash" :cover="true" :onlyAvgColor="true"/>
-	<EmUserOnlineIndicator v-if="indicator" :class="$style.indicator" :user="user"/>
 	<div v-if="user.isCat" :class="[$style.ears]">
 		<div :class="$style.earLeft">
 			<div v-if="false" :class="$style.layer">
@@ -43,7 +42,6 @@ import * as Misskey from 'misskey-js';
 import EmImgWithBlurhash from './EmImgWithBlurhash.vue';
 import EmA from './EmA.vue';
 import { userPage } from '@/utils.js';
-import EmUserOnlineIndicator from '@/components/EmUserOnlineIndicator.vue';
 
 const props = withDefaults(defineProps<{
 	user: Misskey.entities.User;
diff --git a/packages/frontend-embed/src/components/EmPoll.vue b/packages/frontend-embed/src/components/EmPoll.vue
index c510dbc150..add3125ee2 100644
--- a/packages/frontend-embed/src/components/EmPoll.vue
+++ b/packages/frontend-embed/src/components/EmPoll.vue
@@ -30,11 +30,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 import { computed, ref } from 'vue';
 import * as Misskey from 'misskey-js';
 import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';
-import { sum } from '@/scripts/array.js';
 import { i18n } from '@/i18n.js';
 import { host } from '@/config.js';
 import { useInterval } from '@/to-be-shared/use-interval.js';
 
+function sum(xs: number[]): number {
+	return xs.reduce((a, b) => a + b, 0);
+}
+
 const props = defineProps<{
 	noteId: string;
 	poll: NonNullable<Misskey.entities.Note['poll']>;
diff --git a/packages/frontend-embed/src/components/EmReactionsViewer.reaction.vue b/packages/frontend-embed/src/components/EmReactionsViewer.reaction.vue
index 56c61dfcd1..2e43eb8d17 100644
--- a/packages/frontend-embed/src/components/EmReactionsViewer.reaction.vue
+++ b/packages/frontend-embed/src/components/EmReactionsViewer.reaction.vue
@@ -8,7 +8,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	class="_button"
 	:class="[$style.root, { [$style.reacted]: note.myReaction == reaction }]"
 >
-	<MkReactionIcon :class="$style.limitWidth" :reaction="reaction" :emojiUrl="note.reactionEmojis[reaction.substring(1, reaction.length - 1)]"/>
+	<EmReactionIcon :class="$style.limitWidth" :reaction="reaction" :emojiUrl="note.reactionEmojis[reaction.substring(1, reaction.length - 1)]"/>
 	<span :class="$style.count">{{ count }}</span>
 </button>
 </template>
@@ -16,7 +16,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { } from 'vue';
 import * as Misskey from 'misskey-js';
-import MkReactionIcon from '@/components/MkReactionIcon.vue';
+import EmReactionIcon from '@/components/EmReactionIcon.vue';
 
 const props = defineProps<{
 	reaction: string;
diff --git a/packages/frontend-embed/src/components/EmTime.vue b/packages/frontend-embed/src/components/EmTime.vue
index a4ddcb4642..a8627e02c8 100644
--- a/packages/frontend-embed/src/components/EmTime.vue
+++ b/packages/frontend-embed/src/components/EmTime.vue
@@ -15,7 +15,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { onMounted, onUnmounted, ref, computed } from 'vue';
 import { i18n } from '@/i18n.js';
-import { dateTimeFormat } from '@/scripts/intl-const.js';
+import { dateTimeFormat } from '@/to-be-shared/intl-const.js';
 
 const props = withDefaults(defineProps<{
 	time: Date | string | number | null;
diff --git a/packages/frontend-embed/src/to-be-shared/intl-const.ts b/packages/frontend-embed/src/to-be-shared/intl-const.ts
new file mode 100644
index 0000000000..aaa4f0a86e
--- /dev/null
+++ b/packages/frontend-embed/src/to-be-shared/intl-const.ts
@@ -0,0 +1,50 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { lang } from '@/config.js';
+
+export const versatileLang = (lang ?? 'ja-JP').replace('ja-KS', 'ja-JP');
+
+let _dateTimeFormat: Intl.DateTimeFormat;
+try {
+	_dateTimeFormat = new Intl.DateTimeFormat(versatileLang, {
+		year: 'numeric',
+		month: 'numeric',
+		day: 'numeric',
+		hour: 'numeric',
+		minute: 'numeric',
+		second: 'numeric',
+	});
+} catch (err) {
+	console.warn(err);
+	if (_DEV_) console.log('[Intl] Fallback to en-US');
+
+	// Fallback to en-US
+	_dateTimeFormat = new Intl.DateTimeFormat('en-US', {
+		year: 'numeric',
+		month: 'numeric',
+		day: 'numeric',
+		hour: 'numeric',
+		minute: 'numeric',
+		second: 'numeric',
+	});
+}
+export const dateTimeFormat = _dateTimeFormat;
+
+export const timeZone = dateTimeFormat.resolvedOptions().timeZone;
+
+export const hemisphere = /^(australia|pacific|antarctica|indian)\//i.test(timeZone) ? 'S' : 'N';
+
+let _numberFormat: Intl.NumberFormat;
+try {
+	_numberFormat = new Intl.NumberFormat(versatileLang);
+} catch (err) {
+	console.warn(err);
+	if (_DEV_) console.log('[Intl] Fallback to en-US');
+
+	// Fallback to en-US
+	_numberFormat = new Intl.NumberFormat('en-US');
+}
+export const numberFormat = _numberFormat;
diff --git a/packages/frontend-embed/src/workers/draw-blurhash.ts b/packages/frontend-embed/src/workers/draw-blurhash.ts
new file mode 100644
index 0000000000..22de6cd3a8
--- /dev/null
+++ b/packages/frontend-embed/src/workers/draw-blurhash.ts
@@ -0,0 +1,22 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { render } from 'buraha';
+
+const canvas = new OffscreenCanvas(64, 64);
+
+onmessage = (event) => {
+	// console.log(event.data);
+	if (!('id' in event.data && typeof event.data.id === 'string')) {
+		return;
+	}
+	if (!('hash' in event.data && typeof event.data.hash === 'string')) {
+		return;
+	}
+
+	render(event.data.hash, canvas);
+	const bitmap = canvas.transferToImageBitmap();
+	postMessage({ id: event.data.id, bitmap });
+};
diff --git a/packages/frontend-embed/src/workers/test-webgl2.ts b/packages/frontend-embed/src/workers/test-webgl2.ts
new file mode 100644
index 0000000000..b203ebe666
--- /dev/null
+++ b/packages/frontend-embed/src/workers/test-webgl2.ts
@@ -0,0 +1,14 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+const canvas = globalThis.OffscreenCanvas && new OffscreenCanvas(1, 1);
+// 環境によってはOffscreenCanvasが存在しないため
+// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+const gl = canvas?.getContext('webgl2');
+if (gl) {
+	postMessage({ result: true });
+} else {
+	postMessage({ result: false });
+}
diff --git a/packages/frontend-embed/src/workers/tsconfig.json b/packages/frontend-embed/src/workers/tsconfig.json
new file mode 100644
index 0000000000..8ee8930465
--- /dev/null
+++ b/packages/frontend-embed/src/workers/tsconfig.json
@@ -0,0 +1,5 @@
+{
+	"compilerOptions": {
+		"lib": ["esnext", "webworker"],
+	}
+}