diff --git a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx
index 2bd6af4cf4..e2c32dcdb9 100644
--- a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx
+++ b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx
@@ -12,7 +12,7 @@ import Overlay from 'react-overlays/Overlay';
 
 import MoodIcon from '@/material-icons/400-20px/mood.svg?react';
 import { IconButton } from 'mastodon/components/icon_button';
-import emojiCompressed from 'mastodon/features/emoji/emoji_compressed';
+import emojiCompressed from '@/mastodon/features/emoji/emoji_compressed.mjs';
 import { assetHost } from 'mastodon/utils/config';
 
 import { buildCustomEmojis, categoriesFromEmojis } from '../../emoji/emoji';
diff --git a/app/javascript/mastodon/features/emoji/emoji_compressed.d.ts b/app/javascript/mastodon/features/emoji/emoji_compressed.d.mts
similarity index 100%
rename from app/javascript/mastodon/features/emoji/emoji_compressed.d.ts
rename to app/javascript/mastodon/features/emoji/emoji_compressed.d.mts
diff --git a/app/javascript/mastodon/features/emoji/emoji_compressed.js b/app/javascript/mastodon/features/emoji/emoji_compressed.mjs
similarity index 66%
rename from app/javascript/mastodon/features/emoji/emoji_compressed.js
rename to app/javascript/mastodon/features/emoji/emoji_compressed.mjs
index a137b370f2..2fe3d5fe6f 100644
--- a/app/javascript/mastodon/features/emoji/emoji_compressed.js
+++ b/app/javascript/mastodon/features/emoji/emoji_compressed.mjs
@@ -22,14 +22,14 @@ emojiMartUncompress(data);
 const emojiMartData = data;
 const emojiIndex = new NimbleEmojiIndex(emojiMartData);
 
-const excluded       = ['®', '©', '™'];
-const skinTones      = ['🏻', '🏼', '🏽', '🏾', '🏿'];
-const shortcodeMap   = {};
+const excluded = ['®', '©', '™'];
+const skinTones = ['🏻', '🏼', '🏽', '🏾', '🏿'];
+const shortcodeMap = {};
 
 const shortCodesToEmojiData = {};
 const emojisWithoutShortCodes = [];
 
-Object.keys(emojiIndex.emojis).forEach(key => {
+Object.keys(emojiIndex.emojis).forEach((key) => {
   let emoji = emojiIndex.emojis[key];
 
   // Emojis with skin tone modifiers are stored like this
@@ -40,22 +40,22 @@ Object.keys(emojiIndex.emojis).forEach(key => {
   shortcodeMap[emoji.native] = emoji.id;
 });
 
-const stripModifiers = unicode => {
-  skinTones.forEach(tone => {
+const stripModifiers = (unicode) => {
+  skinTones.forEach((tone) => {
     unicode = unicode.replace(tone, '');
   });
 
   return unicode;
 };
 
-Object.keys(emojiMap).forEach(key => {
+Object.keys(emojiMap).forEach((key) => {
   if (excluded.includes(key)) {
     delete emojiMap[key];
     return;
   }
 
   const normalizedKey = stripModifiers(key);
-  let shortcode       = shortcodeMap[normalizedKey];
+  let shortcode = shortcodeMap[normalizedKey];
 
   if (!shortcode) {
     shortcode = shortcodeMap[normalizedKey + '\uFE0F'];
@@ -81,7 +81,7 @@ Object.keys(emojiMap).forEach(key => {
   }
 });
 
-Object.keys(emojiIndex.emojis).forEach(key => {
+Object.keys(emojiIndex.emojis).forEach((key) => {
   let emoji = emojiIndex.emojis[key];
 
   // Emojis with skin tone modifiers are stored like this
@@ -93,9 +93,11 @@ Object.keys(emojiIndex.emojis).forEach(key => {
   let { short_names, search, unified } = emojiMartData.emojis[key];
 
   if (short_names[0] !== key) {
-    throw new Error('The compressor expects the first short_code to be the ' +
-      'key. It may need to be rewritten if the emoji change such that this ' +
-      'is no longer the case.');
+    throw new Error(
+      'The compressor expects the first short_code to be the ' +
+        'key. It may need to be rewritten if the emoji change such that this ' +
+        'is no longer the case.',
+    );
   }
 
   short_names = short_names.slice(1); // first short name can be inferred from the key
@@ -116,21 +118,23 @@ Object.keys(emojiIndex.emojis).forEach(key => {
 
 // JSON.parse/stringify is to emulate what @preval is doing and avoid any
 // inconsistent behavior in dev mode
-export default JSON.parse(JSON.stringify([
-  shortCodesToEmojiData,
-  /*
-   * The property `skins` is not found in the current context.
-   * This could potentially lead to issues when interacting with modules or data structures
-   * that expect the presence of `skins` property.
-   * Currently, no definitions or references to `skins` property can be found in:
-   * - {@link node_modules/emoji-mart/dist/utils/data.js}
-   * - {@link node_modules/emoji-mart/data/all.json}
-   * - {@link app/javascript/mastodon/features/emoji/emoji_compressed.d.ts#Skins}
-   * Future refactorings or updates should consider adding definitions or handling for `skins` property.
-   */
-  emojiMartData.skins,
-  emojiMartData.categories,
-  emojiMartData.aliases,
-  emojisWithoutShortCodes,
-  emojiMartData
-]));
+export default JSON.parse(
+  JSON.stringify([
+    shortCodesToEmojiData,
+    /*
+     * The property `skins` is not found in the current context.
+     * This could potentially lead to issues when interacting with modules or data structures
+     * that expect the presence of `skins` property.
+     * Currently, no definitions or references to `skins` property can be found in:
+     * - {@link node_modules/emoji-mart/dist/utils/data.js}
+     * - {@link node_modules/emoji-mart/data/all.json}
+     * - {@link app/javascript/mastodon/features/emoji/emoji_compressed.d.ts#Skins}
+     * Future refactorings or updates should consider adding definitions or handling for `skins` property.
+     */
+    emojiMartData.skins,
+    emojiMartData.categories,
+    emojiMartData.aliases,
+    emojisWithoutShortCodes,
+    emojiMartData,
+  ]),
+);
diff --git a/app/javascript/mastodon/features/emoji/emoji_mart_data_light.ts b/app/javascript/mastodon/features/emoji/emoji_mart_data_light.ts
index 8eeb457055..bcbc93bf18 100644
--- a/app/javascript/mastodon/features/emoji/emoji_mart_data_light.ts
+++ b/app/javascript/mastodon/features/emoji/emoji_mart_data_light.ts
@@ -4,8 +4,8 @@
 import type { BaseEmoji } from 'emoji-mart';
 import type { Emoji } from 'emoji-mart/dist-es/utils/data';
 
-import type { Search, ShortCodesToEmojiData } from './emoji_compressed';
-import emojiCompressed from './emoji_compressed';
+import type { Search, ShortCodesToEmojiData } from './emoji_compressed.mjs';
+import emojiCompressed from './emoji_compressed.mjs';
 import { unicodeToUnifiedName } from './unicode_to_unified_name';
 
 type Emojis = Record<
diff --git a/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.ts b/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.ts
index 0a5a4c1d76..02bc85dc80 100644
--- a/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.ts
+++ b/app/javascript/mastodon/features/emoji/emoji_unicode_mapping_light.ts
@@ -5,8 +5,8 @@
 import type {
   FilenameData,
   ShortCodesToEmojiDataKey,
-} from './emoji_compressed';
-import emojiCompressed from './emoji_compressed';
+} from './emoji_compressed.mjs';
+import emojiCompressed from './emoji_compressed.mjs';
 import { unicodeToFilename } from './unicode_to_filename';
 
 type UnicodeMapping = Record<
diff --git a/vite.config.mts b/vite.config.mts
index c0159c5aa3..798abee81d 100644
--- a/vite.config.mts
+++ b/vite.config.mts
@@ -104,7 +104,7 @@ export const config: UserConfigFnPromise = async ({ mode, command }) => {
       }),
       react({
         babel: {
-          plugins: ['formatjs', 'transform-react-remove-prop-types'],
+          plugins: ['formatjs', 'transform-react-remove-prop-types', 'preval'],
         },
       }),
       MastodonServiceWorkerLocales(),
@@ -132,7 +132,6 @@ export const config: UserConfigFnPromise = async ({ mode, command }) => {
         },
       }),
       svgr(),
-      // manifestSRI(),
       // Old library types need to be converted
       optimizeLodashImports() as PluginOption,
       !!process.env.ANALYZE_BUNDLE_SIZE && analyzer({ analyzerMode: 'static' }),