diff --git a/CHANGELOG.md b/CHANGELOG.md
index e363abe2b..0fd61442e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@
 
 -->
 
+## 12.101.1 (2021/12/29)
+
+### Bugfixes
+- SVG絵文字が表示できないのを修正
+- エクスポートした絵文字の拡張子がfalseになることがあるのを修正
+
 ## 12.101.0 (2021/12/29)
 
 ### Improvements
diff --git a/package.json b/package.json
index 0c5becded..c42b71582 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "12.101.0",
+	"version": "12.101.1",
 	"codename": "indigo",
 	"repository": {
 		"type": "git",
diff --git a/packages/backend/src/const.ts b/packages/backend/src/const.ts
index b00bd8165..43f59f1e4 100644
--- a/packages/backend/src/const.ts
+++ b/packages/backend/src/const.ts
@@ -1,47 +1,2 @@
 export const USER_ONLINE_THRESHOLD = 1000 * 60 * 10; // 10min
 export const USER_ACTIVE_THRESHOLD = 1000 * 60 * 60 * 24 * 3; // 3days
-
-// ブラウザで直接表示することを許可するファイルの種類のリスト
-// ここに含まれないものは application/octet-stream としてレスポンスされる
-// SVGはXSSを生むので許可しない
-export const FILE_TYPE_BROWSERSAFE = [
-	// Images
-	'image/png',
-	'image/gif',
-	'image/jpeg',
-	'image/webp',
-	'image/apng',
-	'image/bmp',
-	'image/tiff',
-	'image/x-icon',
-
-	// OggS
-	'audio/opus',
-	'video/ogg',
-	'audio/ogg',
-	'application/ogg',
-
-	// ISO/IEC base media file format
-	'video/quicktime',
-	'video/mp4',
-	'audio/mp4',
-	'video/x-m4v',
-	'audio/x-m4a',
-	'video/3gpp',
-	'video/3gpp2',
-
-	'video/mpeg',
-	'audio/mpeg',
-
-	'video/webm',
-	'audio/webm',
-
-	'audio/aac',
-	'audio/x-flac',
-	'audio/vnd.wave',
-];
-/*
-https://github.com/sindresorhus/file-type/blob/main/supported.js
-https://github.com/sindresorhus/file-type/blob/main/core.js
-https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Containers
-*/
diff --git a/packages/backend/src/queue/processors/db/export-custom-emojis.ts b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
index 925b18797..3930b9d6d 100644
--- a/packages/backend/src/queue/processors/db/export-custom-emojis.ts
+++ b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
@@ -65,7 +65,8 @@ export async function exportCustomEmojis(job: Bull.Job, done: () => void): Promi
 
 	for (const emoji of customEmojis) {
 		const exportId = ulid().toLowerCase();
-		const emojiPath = path + '/' + exportId + '.' + mime.extension(emoji.type);
+		const ext = mime.extension(emoji.type);
+		const emojiPath = path + '/' + exportId + (ext ? '.' + ext : '');
 		fs.writeFileSync(emojiPath, '', 'binary');
 		let downloaded = false;
 
diff --git a/packages/backend/src/server/file/send-drive-file.ts b/packages/backend/src/server/file/send-drive-file.ts
index 7bfc36e25..8bb5655b4 100644
--- a/packages/backend/src/server/file/send-drive-file.ts
+++ b/packages/backend/src/server/file/send-drive-file.ts
@@ -14,7 +14,6 @@ import { detectType } from '@/misc/get-file-info';
 import { convertToJpeg, convertToPngOrJpeg } from '@/services/drive/image-processor';
 import { GenerateVideoThumbnail } from '@/services/drive/generate-video-thumbnail';
 import { StatusError } from '@/misc/fetch';
-import { FILE_TYPE_BROWSERSAFE } from '@/const';
 
 //const _filename = fileURLToPath(import.meta.url);
 const _filename = __filename;
@@ -28,7 +27,6 @@ const commonReadableHandlerGenerator = (ctx: Koa.Context) => (e: Error): void =>
 	ctx.set('Cache-Control', 'max-age=300');
 };
 
-// eslint-disable-next-line import/no-default-export
 export default async function(ctx: Koa.Context) {
 	const key = ctx.params.key;
 
@@ -83,7 +81,7 @@ export default async function(ctx: Koa.Context) {
 
 				const image = await convertFile();
 				ctx.body = image.data;
-				ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(image.type) ? image.type : 'application/octet-stream');
+				ctx.set('Content-Type', image.type);
 				ctx.set('Cache-Control', 'max-age=31536000, immutable');
 			} catch (e) {
 				serverLogger.error(`${e}`);
@@ -114,14 +112,14 @@ export default async function(ctx: Koa.Context) {
 		}).toString();
 
 		ctx.body = InternalStorage.read(key);
-		ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(mime) ? mime : 'application/octet-stream');
+		ctx.set('Content-Type', mime);
 		ctx.set('Cache-Control', 'max-age=31536000, immutable');
 		ctx.set('Content-Disposition', contentDisposition('inline', filename));
 	} else {
 		const readable = InternalStorage.read(file.accessKey!);
 		readable.on('error', commonReadableHandlerGenerator(ctx));
 		ctx.body = readable;
-		ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(file.type) ? file.type : 'application/octet-stream');
+		ctx.set('Content-Type', file.type);
 		ctx.set('Cache-Control', 'max-age=31536000, immutable');
 		ctx.set('Content-Disposition', contentDisposition('inline', file.name));
 	}
diff --git a/packages/backend/src/server/proxy/proxy-media.ts b/packages/backend/src/server/proxy/proxy-media.ts
index b116b4b96..9e13c0877 100644
--- a/packages/backend/src/server/proxy/proxy-media.ts
+++ b/packages/backend/src/server/proxy/proxy-media.ts
@@ -6,7 +6,6 @@ import { createTemp } from '@/misc/create-temp';
 import { downloadUrl } from '@/misc/download-url';
 import { detectType } from '@/misc/get-file-info';
 import { StatusError } from '@/misc/fetch';
-import { FILE_TYPE_BROWSERSAFE } from '@/const';
 
 export async function proxyMedia(ctx: Koa.Context) {
 	const url = 'url' in ctx.query ? ctx.query.url : 'https://' + ctx.params.url;
@@ -19,7 +18,7 @@ export async function proxyMedia(ctx: Koa.Context) {
 
 		const { mime, ext } = await detectType(path);
 
-		if (!FILE_TYPE_BROWSERSAFE.includes(mime)) throw 403;
+		if (!mime.startsWith('image/')) throw 403;
 
 		let image: IImage;
 
diff --git a/packages/backend/src/services/drive/add-file.ts b/packages/backend/src/services/drive/add-file.ts
index a59c9501b..ee4d51a96 100644
--- a/packages/backend/src/services/drive/add-file.ts
+++ b/packages/backend/src/services/drive/add-file.ts
@@ -20,7 +20,6 @@ import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error';
 import * as S3 from 'aws-sdk/clients/s3';
 import { getS3 } from './s3';
 import * as sharp from 'sharp';
-import { FILE_TYPE_BROWSERSAFE } from '@/const';
 
 const logger = driveLogger.createSubLogger('register', 'yellow');
 
@@ -242,7 +241,6 @@ export async function generateAlts(path: string, type: string, generateWeb: bool
  */
 async function upload(key: string, stream: fs.ReadStream | Buffer, type: string, filename?: string) {
 	if (type === 'image/apng') type = 'image/png';
-	if (!FILE_TYPE_BROWSERSAFE.includes(type)) type = 'application/octet-stream';
 
 	const meta = await fetchMeta();