diff --git a/packages/backend/src/misc/is-mime-image.ts b/packages/backend/src/misc/is-mime-image.ts
index 168a9a7af6..acf5c1ede3 100644
--- a/packages/backend/src/misc/is-mime-image.ts
+++ b/packages/backend/src/misc/is-mime-image.ts
@@ -3,6 +3,7 @@ import { FILE_TYPE_BROWSERSAFE } from '@/const.js';
 const dictionary = {
 	'safe-file': FILE_TYPE_BROWSERSAFE,
 	'sharp-convertible-image': ['image/jpeg', 'image/png', 'image/gif', 'image/apng', 'image/vnd.mozilla.apng', 'image/webp', 'image/avif', 'image/svg+xml'],
+	'sharp-animation-convertible-image': ['image/jpeg', 'image/png', 'image/gif', 'image/webp', 'image/avif', 'image/svg+xml'],
 };
 
 export const isMimeImage = (mime: string, type: keyof typeof dictionary): boolean => dictionary[type].includes(mime);
diff --git a/packages/backend/src/server/MediaProxyServerService.ts b/packages/backend/src/server/MediaProxyServerService.ts
index 4491a17545..5b76f15020 100644
--- a/packages/backend/src/server/MediaProxyServerService.ts
+++ b/packages/backend/src/server/MediaProxyServerService.ts
@@ -79,10 +79,18 @@ export class MediaProxyServerService {
 	
 			const { mime, ext } = await this.fileInfoService.detectType(path);
 			const isConvertibleImage = isMimeImage(mime, 'sharp-convertible-image');
+			const isAnimationConvertibleImage = isMimeImage(mime, 'sharp-animation-convertible-image');
 	
 			let image: IImage;
 			if ('emoji' in request.query && isConvertibleImage) {
-				const data = await sharp(path, { animated: !('static' in request.query) })
+				if (!isAnimationConvertibleImage && !('static' in request.query)) {
+					image = {
+						data: fs.readFileSync(path),
+						ext,
+						type: mime,
+					};
+				} else {
+					const data = await sharp(path, { animated: !('static' in request.query) })
 					.resize({
 						height: 128,
 						withoutEnlargement: true,
@@ -90,11 +98,12 @@ export class MediaProxyServerService {
 					.webp(webpDefault)
 					.toBuffer();
 
-				image = {
-					data,
-					ext: 'webp',
-					type: 'image/webp',
-				};
+					image = {
+						data,
+						ext: 'webp',
+						type: 'image/webp',
+					};
+				}
 			} else if ('static' in request.query && isConvertibleImage) {
 				image = await this.imageProcessingService.convertToWebp(path, 498, 280);
 			} else if ('preview' in request.query && isConvertibleImage) {
diff --git a/packages/backend/src/server/web/ClientServerService.ts b/packages/backend/src/server/web/ClientServerService.ts
index 461d1d489b..263b15cc5e 100644
--- a/packages/backend/src/server/web/ClientServerService.ts
+++ b/packages/backend/src/server/web/ClientServerService.ts
@@ -251,10 +251,6 @@ export class ClientServerService {
 
 			reply.header('Content-Security-Policy', 'default-src \'none\'; style-src \'unsafe-inline\'');
 
-			// || emoji.originalUrl してるのは後方互換性のため（publicUrlはstringなので??はだめ）
-			return await reply.redirect(301, emoji.publicUrl || emoji.originalUrl);
-
-			/* https://github.com/misskey-dev/misskey/pull/9431#issuecomment-1373006446
 			const url = new URL('/proxy/emoji.webp', this.config.url);
 			// || emoji.originalUrl してるのは後方互換性のため（publicUrlはstringなので??はだめ）
 			url.searchParams.set('url', emoji.publicUrl || emoji.originalUrl);
@@ -265,7 +261,6 @@ export class ClientServerService {
 				301,
 				url.toString(),
 			);
-			*/
 		});
 
 		fastify.get<{ Params: { path: string } }>('/fluent-emoji/:path(.*)', async (request, reply) => {