diff --git a/src/bundles/extra.ts b/src/bundles/extra.ts
index 2fd6b9156..3c4e34c74 100644
--- a/src/bundles/extra.ts
+++ b/src/bundles/extra.ts
@@ -39,8 +39,6 @@ export { default as LeftSearch } from '../components/left/search/LeftSearch';
 export { default as Settings } from '../components/left/settings/Settings';
 export { default as ContactList } from '../components/left/main/ContactList';
 export { default as NewChat } from '../components/left/newChat/NewChat';
-export { default as NewChatStep1 } from '../components/left/newChat/NewChatStep1';
-export { default as NewChatStep2 } from '../components/left/newChat/NewChatStep2';
 export { default as ArchivedChats } from '../components/left/ArchivedChats';
 export { default as ChatFolderModal } from '../components/left/ChatFolderModal';
 export { default as MuteChatModal } from '../components/left/MuteChatModal';
diff --git a/src/components/common/code/PreBlock.tsx b/src/components/common/code/PreBlock.tsx
deleted file mode 100644
index 3428cf948..000000000
--- a/src/components/common/code/PreBlock.tsx
+++ /dev/null
@@ -1,35 +0,0 @@
-import type { FC } from '../../../lib/teact/teact';
-import React, { memo, useCallback, useState } from '../../../lib/teact/teact';
-
-import buildClassName from '../../../util/buildClassName';
-
-import CodeOverlay from './CodeOverlay';
-
-type OwnProps = {
-  text: string;
-  noCopy?: boolean;
-};
-
-const PreBlock: FC<OwnProps> = ({ text, noCopy }) => {
-  const [isWordWrap, setWordWrap] = useState(true);
-
-  const handleWordWrapToggle = useCallback((wrap) => {
-    setWordWrap(wrap);
-  }, []);
-
-  const blockClass = buildClassName('text-entity-pre', !isWordWrap && 'no-word-wrap');
-
-  return (
-    <pre className={blockClass}>
-      <div className="pre-code custom-scroll-x">{text}</div>
-      <CodeOverlay
-        text={text}
-        className="code-overlay"
-        onWordWrapToggle={handleWordWrapToggle}
-        noCopy={noCopy}
-      />
-    </pre>
-  );
-};
-
-export default memo(PreBlock);
diff --git a/src/components/left/newChat/NewChatStep1.async.tsx b/src/components/left/newChat/NewChatStep1.async.tsx
deleted file mode 100644
index a4aa54691..000000000
--- a/src/components/left/newChat/NewChatStep1.async.tsx
+++ /dev/null
@@ -1,19 +0,0 @@
-import type { FC } from '../../../lib/teact/teact';
-import React from '../../../lib/teact/teact';
-
-import type { OwnProps } from './NewChatStep1';
-
-import { Bundles } from '../../../util/moduleLoader';
-
-import useModuleLoader from '../../../hooks/useModuleLoader';
-
-import Loading from '../../ui/Loading';
-
-const NewChatStep1Async: FC<OwnProps> = (props) => {
-  const NewChatStep1 = useModuleLoader(Bundles.Extra, 'NewChatStep1');
-
-  // eslint-disable-next-line react/jsx-props-no-spreading
-  return NewChatStep1 ? <NewChatStep1 {...props} /> : <Loading />;
-};
-
-export default NewChatStep1Async;
diff --git a/src/components/left/newChat/NewChatStep2.async.tsx b/src/components/left/newChat/NewChatStep2.async.tsx
deleted file mode 100644
index c25829da2..000000000
--- a/src/components/left/newChat/NewChatStep2.async.tsx
+++ /dev/null
@@ -1,19 +0,0 @@
-import type { FC } from '../../../lib/teact/teact';
-import React from '../../../lib/teact/teact';
-
-import type { OwnProps } from './NewChatStep2';
-
-import { Bundles } from '../../../util/moduleLoader';
-
-import useModuleLoader from '../../../hooks/useModuleLoader';
-
-import Loading from '../../ui/Loading';
-
-const NewChatStep2Async: FC<OwnProps> = (props) => {
-  const NewChatStep2 = useModuleLoader(Bundles.Extra, 'NewChatStep2');
-
-  // eslint-disable-next-line react/jsx-props-no-spreading
-  return NewChatStep2 ? <NewChatStep2 {...props} /> : <Loading />;
-};
-
-export default NewChatStep2Async;
diff --git a/src/components/middle/composer/MessageInput.tsx b/src/components/middle/composer/MessageInput.tsx
index 2b1d004d5..bfb65ddfa 100644
--- a/src/components/middle/composer/MessageInput.tsx
+++ b/src/components/middle/composer/MessageInput.tsx
@@ -34,7 +34,7 @@ import useLastCallback from '../../../hooks/useLastCallback';
 import useInputCustomEmojis from './hooks/useInputCustomEmojis';
 
 import TextTimer from '../../ui/TextTimer';
-import TextFormatter from './TextFormatter';
+import TextFormatter from './TextFormatter.async';
 
 const CONTEXT_MENU_CLOSE_DELAY_MS = 100;
 // Focus slows down animation, also it breaks transition layout in Chrome
diff --git a/src/components/middle/message/ContextMenuContainer.tsx b/src/components/middle/message/ContextMenuContainer.tsx
index 653d6d018..be3476549 100644
--- a/src/components/middle/message/ContextMenuContainer.tsx
+++ b/src/components/middle/message/ContextMenuContainer.tsx
@@ -63,7 +63,7 @@ import useSchedule from '../../../hooks/useSchedule';
 import useShowTransition from '../../../hooks/useShowTransition';
 
 import DeleteMessageModal from '../../common/DeleteMessageModal';
-import PinMessageModal from '../../common/PinMessageModal';
+import PinMessageModal from '../../common/PinMessageModal.async';
 import ReportModal from '../../common/ReportModal';
 import ConfirmDialog from '../../ui/ConfirmDialog';
 import MessageContextMenu from './MessageContextMenu';
diff --git a/src/config.ts b/src/config.ts
index c1519e5a4..63773b45b 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -47,8 +47,6 @@ export const MEDIA_CACHE_NAME = 'tt-media';
 export const MEDIA_CACHE_NAME_AVATARS = 'tt-media-avatars';
 export const MEDIA_PROGRESSIVE_CACHE_DISABLED = false;
 export const MEDIA_PROGRESSIVE_CACHE_NAME = 'tt-media-progressive';
-export const CUSTOM_EMOJI_PREVIEW_CACHE_DISABLED = false;
-export const CUSTOM_EMOJI_PREVIEW_CACHE_NAME = 'tt-custom-emoji-preview';
 export const MEDIA_CACHE_MAX_BYTES = 512 * 1024; // 512 KB
 export const CUSTOM_BG_CACHE_NAME = 'tt-custom-bg';
 export const LANG_CACHE_NAME = 'tt-lang-packs-v32';
@@ -327,7 +325,6 @@ export const MAX_UPLOAD_FILEPART_SIZE = 524288;
 // Group calls
 export const GROUP_CALL_VOLUME_MULTIPLIER = 100;
 export const GROUP_CALL_DEFAULT_VOLUME = 100 * GROUP_CALL_VOLUME_MULTIPLIER;
-export const GROUP_CALL_THUMB_VIDEO_DISABLED = true;
 
 export const DEFAULT_LIMITS: Record<ApiLimitType, readonly [number, number]> = {
   uploadMaxFileparts: [4000, 8000],
diff --git a/src/util/FrameDebugger.ts b/src/util/FrameDebugger.ts
deleted file mode 100644
index fac14a617..000000000
--- a/src/util/FrameDebugger.ts
+++ /dev/null
@@ -1,99 +0,0 @@
-const RANDOM = 0.95;
-const DEBOUNCE = 3000;
-
-export default class FrameDebugger {
-  private durations: number[] = [];
-
-  private startedAtByFrameKey: Record<string, number | undefined> = {};
-
-  private passedFrames: string[] = [];
-
-  private timeout: number | undefined;
-
-  constructor(private name: string = '[No name]') {
-  }
-
-  onFrameStart(frameKey = '0') {
-    if (this.passedFrames.includes(frameKey)) {
-      // debugger
-    }
-
-    if (this.startedAtByFrameKey[frameKey]) {
-      return;
-    }
-
-    this.startedAtByFrameKey[frameKey] = performance.now();
-  }
-
-  onFrameEnd(frameKey = '0', onAnimationEnd?: AnyToVoidFunction) {
-    if (!this.startedAtByFrameKey[frameKey]) {
-      return;
-    }
-
-    const duration = performance.now() - this.startedAtByFrameKey[frameKey]!;
-
-    if (this.passedFrames.includes(frameKey)) {
-      // debugger
-    }
-
-    this.passedFrames.push(frameKey);
-    this.durations.push(duration);
-
-    this.startedAtByFrameKey[frameKey] = undefined;
-
-    if (Math.random() < RANDOM) {
-      return;
-    }
-
-    if (this.timeout) {
-      clearTimeout(this.timeout);
-    }
-
-    // eslint-disable-next-line no-restricted-globals
-    this.timeout = self.setTimeout(() => {
-      if (!this.durations.length) {
-        return;
-      }
-
-      const max = Math.max(...this.durations);
-      const min = Math.max(...this.durations);
-      const maxIndex = this.durations.indexOf(max);
-      const minIndex = this.durations.indexOf(min);
-      const reduced = this.durations.slice();
-      reduced.splice(maxIndex, 1);
-      reduced.splice(minIndex, 1);
-      const avg = reduced.reduce((acc, cur) => acc + cur, 0) / this.durations.length;
-
-      // eslint-disable-next-line no-console
-      console.log(
-        '!!!',
-        this.name,
-        'total frames:',
-        this.durations.length,
-        ', avg duration:',
-        avg.toFixed(2),
-        ', max duration:',
-        Math.max(...reduced).toFixed(2),
-        ', min duration:',
-        Math.min(...reduced).toFixed(2),
-      );
-
-      onAnimationEnd?.();
-
-      this.reset();
-    }, DEBOUNCE);
-  }
-
-  reset() {
-    this.durations = [];
-
-    this.startedAtByFrameKey = {};
-
-    this.passedFrames = [];
-
-    if (this.timeout) {
-      clearTimeout(this.timeout);
-      this.timeout = undefined;
-    }
-  }
-}
diff --git a/src/util/getElementHasScroll.ts b/src/util/getElementHasScroll.ts
deleted file mode 100644
index 7d0233f3b..000000000
--- a/src/util/getElementHasScroll.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export default function getElementHasScroll(el: HTMLElement): boolean {
-  return el.scrollHeight > el.clientHeight;
-}
diff --git a/src/util/windowEnvironment.ts b/src/util/windowEnvironment.ts
index 5d0ebbedd..2eb2bdced 100644
--- a/src/util/windowEnvironment.ts
+++ b/src/util/windowEnvironment.ts
@@ -60,12 +60,10 @@ export const IS_VOICE_RECORDING_SUPPORTED = Boolean(
     window.AudioContext || (window as any).webkitAudioContext
   ),
 );
-export const IS_SMOOTH_SCROLL_SUPPORTED = 'scrollBehavior' in document.documentElement.style;
 export const IS_EMOJI_SUPPORTED = PLATFORM_ENV && (IS_MAC_OS || IS_IOS) && isLastEmojiVersionSupported();
 export const IS_SERVICE_WORKER_SUPPORTED = 'serviceWorker' in navigator;
 // TODO Consider failed service worker
 export const IS_PROGRESSIVE_SUPPORTED = IS_SERVICE_WORKER_SUPPORTED;
-export const IS_STREAMING_SUPPORTED = 'MediaSource' in window;
 export const IS_OPUS_SUPPORTED = Boolean((new Audio()).canPlayType('audio/ogg; codecs=opus'));
 export const IS_CANVAS_FILTER_SUPPORTED = (
   !IS_TEST && 'filter' in (document.createElement('canvas').getContext('2d') || {})
diff --git a/src/util/withAbortCheck.ts b/src/util/withAbortCheck.ts
deleted file mode 100644
index 41471f40a..000000000
--- a/src/util/withAbortCheck.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-export class AbortError extends Error {
-  constructor() {
-    super('Aborted');
-  }
-}
-
-export default async function withAbortCheck<T>(abortSignal: AbortSignal, promise: Promise<T>): Promise<T> {
-  const result = await promise;
-
-  if (abortSignal?.aborted) {
-    throw new AbortError();
-  }
-
-  return result;
-}