diff --git a/packages/backend/src/server/web/views/gallery-post.pug b/packages/backend/src/server/web/views/gallery-post.pug
index a458d7f8c..9ae25d9ac 100644
--- a/packages/backend/src/server/web/views/gallery-post.pug
+++ b/packages/backend/src/server/web/views/gallery-post.pug
@@ -16,8 +16,12 @@ block og
 	meta(property='og:title'       content= title)
 	meta(property='og:description' content= post.description)
 	meta(property='og:url'         content= url)
-	meta(property='og:image'       content= post.files[0].thumbnailUrl)
-	meta(property='twitter:card'   content='summary_large_image')
+	if post.isSensitive
+		meta(property='og:image'     content= avatarUrl)
+		meta(property='twitter:card' content='summary')
+	else
+		meta(property='og:image'       content= post.files[0].thumbnailUrl)
+		meta(property='twitter:card'   content='summary_large_image')
 
 block meta
 	if user.host || profile.noCrawle
diff --git a/packages/frontend/src/components/MkMediaList.vue b/packages/frontend/src/components/MkMediaList.vue
index be0aed652..65d3d529d 100644
--- a/packages/frontend/src/components/MkMediaList.vue
+++ b/packages/frontend/src/components/MkMediaList.vue
@@ -1,5 +1,5 @@
 <template>
-<div>
+<div ref="root">
 	<XBanner v-for="media in mediaList.filter(media => !previewable(media))" :key="media.id" :media="media"/>
 	<div v-if="mediaList.filter(media => previewable(media)).length > 0" :class="$style.container">
 		<div
@@ -23,7 +23,7 @@
 </template>
 
 <script lang="ts" setup>
-import { onMounted, watch, shallowRef } from 'vue';
+import { onMounted, shallowRef } from 'vue';
 import * as misskey from 'misskey-js';
 import PhotoSwipeLightbox from 'photoswipe/lightbox';
 import PhotoSwipe from 'photoswipe';
@@ -34,19 +34,26 @@ import XVideo from '@/components/MkMediaVideo.vue';
 import * as os from '@/os';
 import { FILE_TYPE_BROWSERSAFE } from '@/const';
 import { defaultStore } from '@/store';
+import { getScrollContainer, getBodyScrollHeight } from '@/scripts/scroll';
 
 const props = defineProps<{
 	mediaList: misskey.entities.DriveFile[];
 	raw?: boolean;
 }>();
 
+const root = shallowRef<HTMLDivElement>();
+const container = shallowRef<HTMLElement | null | undefined>(undefined);
 const gallery = shallowRef<HTMLDivElement>();
 const pswpZIndex = os.claimZIndex('middle');
 document.documentElement.style.setProperty('--mk-pswp-root-z-index', pswpZIndex.toString());
 const count = $computed(() => props.mediaList.filter(media => previewable(media)).length);
 
+/**
+ * アスペクト比をmediaListWithOneImageAppearanceに基づいていい感じに調整する
+ * aspect-ratioではなくheightを使う
+ */
 function calcAspectRatio() {
-	if (!gallery.value) return;
+	if (!gallery.value || !root.value) return;
 
 	let img = props.mediaList[0];
 
@@ -55,28 +62,46 @@ function calcAspectRatio() {
 		return;
 	}
 
-	// アスペクト比上限設定では、横長の場合は高さを縮小させる
-	const ratioMax = (ratio: number) => `${Math.max(ratio, img.properties.width / img.properties.height).toString()} / 1`;
+	const width = gallery.value.clientWidth;
+
+	const heightMin = (ratio: number) => {
+		const imgResizeRatio = width / img.properties.width;
+		const imgDrawHeight = img.properties.height * imgResizeRatio;
+		const maxHeight = width * ratio;
+		const height = Math.min(imgDrawHeight, maxHeight);
+		if (_DEV_) console.log('Image height calculated:', { width, properties: img.properties, imgResizeRatio, imgDrawHeight, maxHeight, height });
+		return `${height}px`;
+	};
 
 	switch (defaultStore.state.mediaListWithOneImageAppearance) {
 		case '16_9':
-			gallery.value.style.aspectRatio = ratioMax(16 / 9);
+			gallery.value.style.height = heightMin(9 / 16);
 			break;
 		case '1_1':
-			gallery.value.style.aspectRatio = ratioMax(1);
+			gallery.value.style.height = heightMin(1);
 			break;
 		case '2_3':
-			gallery.value.style.aspectRatio = ratioMax(2 / 3);
+			gallery.value.style.height = heightMin(3 / 2);
 			break;
-		default:
-			gallery.value.style.aspectRatio = '';
+		default: {
+			if (!container.value) container.value = getScrollContainer(root.value);
+			const maxHeight = Math.max(64, (container.value ? container.value.clientHeight : getBodyScrollHeight()) * 0.5 || 360);
+			if (width === 0 || !maxHeight) return;
+			const imgResizeRatio = width / img.properties.width;
+			const imgDrawHeight = img.properties.height * imgResizeRatio;
+			gallery.value.style.height = `${Math.max(64, Math.min(imgDrawHeight, maxHeight))}px`;
+			gallery.value.style.minHeight = 'initial';
+			gallery.value.style.maxHeight = 'initial';
 			break;
+		}
 	}
+
+	gallery.value.style.aspectRatio = 'initial';
 }
 
-watch([defaultStore.reactiveState.mediaListWithOneImageAppearance, gallery], () => calcAspectRatio());
-
 onMounted(() => {
+	calcAspectRatio();
+
 	const lightbox = new PhotoSwipeLightbox({
 		dataSource: props.mediaList
 			.filter(media => {
@@ -203,7 +228,7 @@ const previewable = (file: misskey.entities.DriveFile): boolean => {
 	&.n1 {
 		grid-template-rows: 1fr;
 
-		// default (expand)
+		// default but fallback (expand)
 		min-height: 64px;
 		max-height: clamp(
 			64px,
@@ -212,20 +237,20 @@ const previewable = (file: misskey.entities.DriveFile): boolean => {
 		);
 
 		&.n116_9 {
-			min-height: none;
-			max-height: none;
+			min-height: initial;
+			max-height: initial;
 			aspect-ratio: 16 / 9; // fallback
 		}
 
 		&.n11_1{
-			min-height: none;
-			max-height: none;
+			min-height: initial;
+			max-height: initial;
 			aspect-ratio: 1 / 1; // fallback
 		}
 
 		&.n12_3 {
-			min-height: none;
-			max-height: none;
+			min-height: initial;
+			max-height: initial;
 			aspect-ratio: 2 / 3; // fallback
 		}
 	}
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index f516ccbad..3c1aed63e 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -540,7 +540,7 @@ function onCompositionEnd(ev: CompositionEvent) {
 }
 
 async function onPaste(ev: ClipboardEvent) {
-	for (const { item, i } of Array.from(ev.clipboardData.items).map((item, i) => ({ item, i }))) {
+	for (const { item, i } of Array.from(ev.clipboardData.items, (item, i) => ({ item, i }))) {
 		if (item.kind === 'file') {
 			const file = item.getAsFile();
 			const lio = file.name.lastIndexOf('.');
diff --git a/packages/frontend/src/components/MkTagCloud.vue b/packages/frontend/src/components/MkTagCloud.vue
index 6e4e054aa..21e76b766 100644
--- a/packages/frontend/src/components/MkTagCloud.vue
+++ b/packages/frontend/src/components/MkTagCloud.vue
@@ -16,8 +16,8 @@ import tinycolor from 'tinycolor2';
 const loaded = !!window.TagCanvas;
 const SAFE_FOR_HTML_ID = 'abcdefghijklmnopqrstuvwxyz';
 const computedStyle = getComputedStyle(document.documentElement);
-const idForCanvas = Array.from(Array(16)).map(() => SAFE_FOR_HTML_ID[Math.floor(Math.random() * SAFE_FOR_HTML_ID.length)]).join('');
-const idForTags = Array.from(Array(16)).map(() => SAFE_FOR_HTML_ID[Math.floor(Math.random() * SAFE_FOR_HTML_ID.length)]).join('');
+const idForCanvas = Array.from({ length: 16 }, () => SAFE_FOR_HTML_ID[Math.floor(Math.random() * SAFE_FOR_HTML_ID.length)]).join('');
+const idForTags = Array.from({ length: 16 }, () => SAFE_FOR_HTML_ID[Math.floor(Math.random() * SAFE_FOR_HTML_ID.length)]).join('');
 let available = $ref(false);
 let rootEl = $shallowRef<HTMLElement | null>(null);
 let canvasEl = $shallowRef<HTMLCanvasElement | null>(null);
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index cfe5cd31e..31a288745 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -258,6 +258,7 @@ watch([
 	showGapBetweenNotesInTimeline,
 	instanceTicker,
 	overridedDeviceKind,
+	mediaListWithOneImageAppearance,
 ], async () => {
 	await reloadAsk();
 });
diff --git a/packages/frontend/src/scripts/emoji-base.ts b/packages/frontend/src/scripts/emoji-base.ts
index 3f05642d5..e91f2fa22 100644
--- a/packages/frontend/src/scripts/emoji-base.ts
+++ b/packages/frontend/src/scripts/emoji-base.ts
@@ -2,7 +2,7 @@ const twemojiSvgBase = '/twemoji';
 const fluentEmojiPngBase = '/fluent-emoji';
 
 export function char2twemojiFilePath(char: string): string {
-	let codes = Array.from(char).map(x => x.codePointAt(0)?.toString(16));
+	let codes = Array.from(char, x => x.codePointAt(0)?.toString(16));
 	if (!codes.includes('200d')) codes = codes.filter(x => x !== 'fe0f');
 	codes = codes.filter(x => x && x.length);
 	const fileName = codes.join('-');
@@ -10,7 +10,7 @@ export function char2twemojiFilePath(char: string): string {
 }
 
 export function char2fluentEmojiFilePath(char: string): string {
-	let codes = Array.from(char).map(x => x.codePointAt(0)?.toString(16));
+	let codes = Array.from(char, x => x.codePointAt(0)?.toString(16));
 	// Fluent Emojiは国旗非対応 https://github.com/microsoft/fluentui-emoji/issues/25
 	if (codes[0]?.startsWith('1f1')) return char2twemojiFilePath(char);
 	if (!codes.includes('200d')) codes = codes.filter(x => x !== 'fe0f');
diff --git a/packages/frontend/src/scripts/select-file.ts b/packages/frontend/src/scripts/select-file.ts
index 44a58d6c7..891da6eb7 100644
--- a/packages/frontend/src/scripts/select-file.ts
+++ b/packages/frontend/src/scripts/select-file.ts
@@ -12,7 +12,8 @@ export function chooseFileFromPc(multiple: boolean, keepOriginal = false): Promi
 		input.type = 'file';
 		input.multiple = multiple;
 		input.onchange = () => {
-			const promises = Array.from(input.files).map(file => uploadFile(file, defaultStore.state.uploadFolder, undefined, keepOriginal));
+			if (!input.files) return res([]);
+			const promises = Array.from(input.files, file => uploadFile(file, defaultStore.state.uploadFolder, undefined, keepOriginal));
 
 			Promise.all(promises).then(driveFiles => {
 				res(driveFiles);