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diff --git a/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx
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+++ b/app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.jsx
@@ -0,0 +1,413 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+import { EmojiPicker as EmojiPickerAsync } from '../../ui/util/async-components';
+import Overlay from 'react-overlays/Overlay';
+import classNames from 'classnames';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import { supportsPassiveEvents } from 'detect-passive-events';
+import { buildCustomEmojis, categoriesFromEmojis } from '../../emoji/emoji';
+import { assetHost } from 'mastodon/utils/config';
+
+const messages = defineMessages({
+  emoji: { id: 'emoji_button.label', defaultMessage: 'Insert emoji' },
+  emoji_search: { id: 'emoji_button.search', defaultMessage: 'Search...' },
+  custom: { id: 'emoji_button.custom', defaultMessage: 'Custom' },
+  recent: { id: 'emoji_button.recent', defaultMessage: 'Frequently used' },
+  search_results: { id: 'emoji_button.search_results', defaultMessage: 'Search results' },
+  people: { id: 'emoji_button.people', defaultMessage: 'People' },
+  nature: { id: 'emoji_button.nature', defaultMessage: 'Nature' },
+  food: { id: 'emoji_button.food', defaultMessage: 'Food & Drink' },
+  activity: { id: 'emoji_button.activity', defaultMessage: 'Activity' },
+  travel: { id: 'emoji_button.travel', defaultMessage: 'Travel & Places' },
+  objects: { id: 'emoji_button.objects', defaultMessage: 'Objects' },
+  symbols: { id: 'emoji_button.symbols', defaultMessage: 'Symbols' },
+  flags: { id: 'emoji_button.flags', defaultMessage: 'Flags' },
+});
+
+let EmojiPicker, Emoji; // load asynchronously
+
+const listenerOptions = supportsPassiveEvents ? { passive: true } : false;
+
+const backgroundImageFn = () => `${assetHost}/emoji/sheet_13.png`;
+
+const notFoundFn = () => (
+  <div className='emoji-mart-no-results'>
+    <Emoji
+      emoji='sleuth_or_spy'
+      set='twitter'
+      size={32}
+      sheetSize={32}
+      backgroundImageFn={backgroundImageFn}
+    />
+
+    <div className='emoji-mart-no-results-label'>
+      <FormattedMessage id='emoji_button.not_found' defaultMessage='No matching emojis found' />
+    </div>
+  </div>
+);
+
+class ModifierPickerMenu extends React.PureComponent {
+
+  static propTypes = {
+    active: PropTypes.bool,
+    onSelect: PropTypes.func.isRequired,
+    onClose: PropTypes.func.isRequired,
+  };
+
+  handleClick = e => {
+    this.props.onSelect(e.currentTarget.getAttribute('data-index') * 1);
+  };
+
+  componentWillReceiveProps (nextProps) {
+    if (nextProps.active) {
+      this.attachListeners();
+    } else {
+      this.removeListeners();
+    }
+  }
+
+  componentWillUnmount () {
+    this.removeListeners();
+  }
+
+  handleDocumentClick = e => {
+    if (this.node && !this.node.contains(e.target)) {
+      this.props.onClose();
+    }
+  };
+
+  attachListeners () {
+    document.addEventListener('click', this.handleDocumentClick, false);
+    document.addEventListener('touchend', this.handleDocumentClick, listenerOptions);
+  }
+
+  removeListeners () {
+    document.removeEventListener('click', this.handleDocumentClick, false);
+    document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
+  }
+
+  setRef = c => {
+    this.node = c;
+  };
+
+  render () {
+    const { active } = this.props;
+
+    return (
+      <div className='emoji-picker-dropdown__modifiers__menu' style={{ display: active ? 'block' : 'none' }} ref={this.setRef}>
+        <button type='button' onClick={this.handleClick} data-index={1}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={1} backgroundImageFn={backgroundImageFn} /></button>
+        <button type='button' onClick={this.handleClick} data-index={2}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={2} backgroundImageFn={backgroundImageFn} /></button>
+        <button type='button' onClick={this.handleClick} data-index={3}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={3} backgroundImageFn={backgroundImageFn} /></button>
+        <button type='button' onClick={this.handleClick} data-index={4}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={4} backgroundImageFn={backgroundImageFn} /></button>
+        <button type='button' onClick={this.handleClick} data-index={5}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={5} backgroundImageFn={backgroundImageFn} /></button>
+        <button type='button' onClick={this.handleClick} data-index={6}><Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={6} backgroundImageFn={backgroundImageFn} /></button>
+      </div>
+    );
+  }
+
+}
+
+class ModifierPicker extends React.PureComponent {
+
+  static propTypes = {
+    active: PropTypes.bool,
+    modifier: PropTypes.number,
+    onChange: PropTypes.func,
+    onClose: PropTypes.func,
+    onOpen: PropTypes.func,
+  };
+
+  handleClick = () => {
+    if (this.props.active) {
+      this.props.onClose();
+    } else {
+      this.props.onOpen();
+    }
+  };
+
+  handleSelect = modifier => {
+    this.props.onChange(modifier);
+    this.props.onClose();
+  };
+
+  render () {
+    const { active, modifier } = this.props;
+
+    return (
+      <div className='emoji-picker-dropdown__modifiers'>
+        <Emoji emoji='fist' set='twitter' size={22} sheetSize={32} skin={modifier} onClick={this.handleClick} backgroundImageFn={backgroundImageFn} />
+        <ModifierPickerMenu active={active} onSelect={this.handleSelect} onClose={this.props.onClose} />
+      </div>
+    );
+  }
+
+}
+
+class EmojiPickerMenuImpl extends React.PureComponent {
+
+  static propTypes = {
+    custom_emojis: ImmutablePropTypes.list,
+    frequentlyUsedEmojis: PropTypes.arrayOf(PropTypes.string),
+    loading: PropTypes.bool,
+    onClose: PropTypes.func.isRequired,
+    onPick: PropTypes.func.isRequired,
+    style: PropTypes.object,
+    intl: PropTypes.object.isRequired,
+    skinTone: PropTypes.number.isRequired,
+    onSkinTone: PropTypes.func.isRequired,
+  };
+
+  static defaultProps = {
+    style: {},
+    loading: true,
+    frequentlyUsedEmojis: [],
+  };
+
+  state = {
+    modifierOpen: false,
+    readyToFocus: false,
+  };
+
+  handleDocumentClick = e => {
+    if (this.node && !this.node.contains(e.target)) {
+      this.props.onClose();
+    }
+  };
+
+  componentDidMount () {
+    document.addEventListener('click', this.handleDocumentClick, false);
+    document.addEventListener('touchend', this.handleDocumentClick, listenerOptions);
+
+    // Because of https://github.com/react-bootstrap/react-bootstrap/issues/2614 we need
+    // to wait for a frame before focusing
+    requestAnimationFrame(() => {
+      this.setState({ readyToFocus: true });
+      if (this.node) {
+        const element = this.node.querySelector('input[type="search"]');
+        if (element) element.focus();
+      }
+    });
+  }
+
+  componentWillUnmount () {
+    document.removeEventListener('click', this.handleDocumentClick, false);
+    document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
+  }
+
+  setRef = c => {
+    this.node = c;
+  };
+
+  getI18n = () => {
+    const { intl } = this.props;
+
+    return {
+      search: intl.formatMessage(messages.emoji_search),
+      categories: {
+        search: intl.formatMessage(messages.search_results),
+        recent: intl.formatMessage(messages.recent),
+        people: intl.formatMessage(messages.people),
+        nature: intl.formatMessage(messages.nature),
+        foods: intl.formatMessage(messages.food),
+        activity: intl.formatMessage(messages.activity),
+        places: intl.formatMessage(messages.travel),
+        objects: intl.formatMessage(messages.objects),
+        symbols: intl.formatMessage(messages.symbols),
+        flags: intl.formatMessage(messages.flags),
+        custom: intl.formatMessage(messages.custom),
+      },
+    };
+  };
+
+  handleClick = (emoji, event) => {
+    if (!emoji.native) {
+      emoji.native = emoji.colons;
+    }
+    if (!(event.ctrlKey || event.metaKey)) {
+      this.props.onClose();
+    }
+    this.props.onPick(emoji);
+  };
+
+  handleModifierOpen = () => {
+    this.setState({ modifierOpen: true });
+  };
+
+  handleModifierClose = () => {
+    this.setState({ modifierOpen: false });
+  };
+
+  handleModifierChange = modifier => {
+    this.props.onSkinTone(modifier);
+  };
+
+  render () {
+    const { loading, style, intl, custom_emojis, skinTone, frequentlyUsedEmojis } = this.props;
+
+    if (loading) {
+      return <div style={{ width: 299 }} />;
+    }
+
+    const title = intl.formatMessage(messages.emoji);
+
+    const { modifierOpen } = this.state;
+
+    const categoriesSort = [
+      'recent',
+      'people',
+      'nature',
+      'foods',
+      'activity',
+      'places',
+      'objects',
+      'symbols',
+      'flags',
+    ];
+
+    categoriesSort.splice(1, 0, ...Array.from(categoriesFromEmojis(custom_emojis)).sort());
+
+    return (
+      <div className={classNames('emoji-picker-dropdown__menu', { selecting: modifierOpen })} style={style} ref={this.setRef}>
+        <EmojiPicker
+          perLine={8}
+          emojiSize={22}
+          sheetSize={32}
+          custom={buildCustomEmojis(custom_emojis)}
+          color=''
+          emoji=''
+          set='twitter'
+          title={title}
+          i18n={this.getI18n()}
+          onClick={this.handleClick}
+          include={categoriesSort}
+          recent={frequentlyUsedEmojis}
+          skin={skinTone}
+          showPreview={false}
+          showSkinTones={false}
+          backgroundImageFn={backgroundImageFn}
+          notFound={notFoundFn}
+          autoFocus={this.state.readyToFocus}
+          emojiTooltip
+        />
+
+        <ModifierPicker
+          active={modifierOpen}
+          modifier={skinTone}
+          onOpen={this.handleModifierOpen}
+          onClose={this.handleModifierClose}
+          onChange={this.handleModifierChange}
+        />
+      </div>
+    );
+  }
+
+}
+
+const EmojiPickerMenu = injectIntl(EmojiPickerMenuImpl);
+
+class EmojiPickerDropdown extends React.PureComponent {
+
+  static propTypes = {
+    custom_emojis: ImmutablePropTypes.list,
+    frequentlyUsedEmojis: PropTypes.arrayOf(PropTypes.string),
+    intl: PropTypes.object.isRequired,
+    onPickEmoji: PropTypes.func.isRequired,
+    onSkinTone: PropTypes.func.isRequired,
+    skinTone: PropTypes.number.isRequired,
+    button: PropTypes.node,
+  };
+
+  state = {
+    active: false,
+    loading: false,
+  };
+
+  setRef = (c) => {
+    this.dropdown = c;
+  };
+
+  onShowDropdown = () => {
+    this.setState({ active: true });
+
+    if (!EmojiPicker) {
+      this.setState({ loading: true });
+
+      EmojiPickerAsync().then(EmojiMart => {
+        EmojiPicker = EmojiMart.Picker;
+        Emoji       = EmojiMart.Emoji;
+
+        this.setState({ loading: false });
+      }).catch(() => {
+        this.setState({ loading: false, active: false });
+      });
+    }
+  };
+
+  onHideDropdown = () => {
+    this.setState({ active: false });
+  };
+
+  onToggle = (e) => {
+    if (!this.state.loading && (!e.key || e.key === 'Enter')) {
+      if (this.state.active) {
+        this.onHideDropdown();
+      } else {
+        this.onShowDropdown(e);
+      }
+    }
+  };
+
+  handleKeyDown = e => {
+    if (e.key === 'Escape') {
+      this.onHideDropdown();
+    }
+  };
+
+  setTargetRef = c => {
+    this.target = c;
+  };
+
+  findTarget = () => {
+    return this.target;
+  };
+
+  render () {
+    const { intl, onPickEmoji, onSkinTone, skinTone, frequentlyUsedEmojis, button } = this.props;
+    const title = intl.formatMessage(messages.emoji);
+    const { active, loading } = this.state;
+
+    return (
+      <div className='emoji-picker-dropdown' onKeyDown={this.handleKeyDown}>
+        <div ref={this.setTargetRef} className='emoji-button' title={title} aria-label={title} aria-expanded={active} role='button' onClick={this.onToggle} onKeyDown={this.onToggle} tabIndex={0}>
+          {button || <img
+            className={classNames('emojione', { 'pulse-loading': active && loading })}
+            alt='🙂'
+            src={`${assetHost}/emoji/1f602.svg`}
+          />}
+        </div>
+
+        <Overlay show={active} placement={'bottom'} target={this.findTarget} popperConfig={{ strategy: 'fixed' }}>
+          {({ props, placement })=> (
+            <div {...props} style={{ ...props.style, width: 299 }}>
+              <div className={`dropdown-animation ${placement}`}>
+                <EmojiPickerMenu
+                  custom_emojis={this.props.custom_emojis}
+                  loading={loading}
+                  onClose={this.onHideDropdown}
+                  onPick={onPickEmoji}
+                  onSkinTone={onSkinTone}
+                  skinTone={skinTone}
+                  frequentlyUsedEmojis={frequentlyUsedEmojis}
+                />
+              </div>
+            </div>
+          )}
+        </Overlay>
+      </div>
+    );
+  }
+
+}
+
+export default injectIntl(EmojiPickerDropdown);