diff --git a/app/javascript/flavours/glitch/components/media_gallery.js b/app/javascript/flavours/glitch/components/media_gallery.js
index 5169ead5aaf..925132b077e 100644
--- a/app/javascript/flavours/glitch/components/media_gallery.js
+++ b/app/javascript/flavours/glitch/components/media_gallery.js
@@ -33,10 +33,6 @@ const messages = defineMessages({
 
 class Item extends React.PureComponent {
 
-  static contextTypes = {
-    router: PropTypes.object,
-  };
-
   static propTypes = {
     attachment: ImmutablePropTypes.map.isRequired,
     standalone: PropTypes.bool,
@@ -73,7 +69,7 @@ class Item extends React.PureComponent {
   handleClick = (e) => {
     const { index, onClick } = this.props;
 
-    if (this.context.router && e.button === 0) {
+    if (e.button === 0) {
       e.preventDefault();
       onClick(index);
     }
diff --git a/app/javascript/flavours/glitch/components/modal_root.js b/app/javascript/flavours/glitch/components/modal_root.js
new file mode 100644
index 00000000000..789e117c705
--- /dev/null
+++ b/app/javascript/flavours/glitch/components/modal_root.js
@@ -0,0 +1,84 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+
+export default class ModalRoot extends React.PureComponent {
+
+  static propTypes = {
+    children: PropTypes.node,
+    onClose: PropTypes.func.isRequired,
+  };
+
+  state = {
+    revealed: !!this.props.children,
+  };
+
+  activeElement = this.state.revealed ? document.activeElement : null;
+
+  handleKeyUp = (e) => {
+    if ((e.key === 'Escape' || e.key === 'Esc' || e.keyCode === 27)
+         && !!this.props.children && !this.props.props.noEsc) {
+      this.props.onClose();
+    }
+  }
+
+  componentDidMount () {
+    window.addEventListener('keyup', this.handleKeyUp, false);
+  }
+
+  componentWillReceiveProps (nextProps) {
+    if (!!nextProps.children && !this.props.children) {
+      this.activeElement = document.activeElement;
+
+      this.getSiblings().forEach(sibling => sibling.setAttribute('inert', true));
+    } else if (!nextProps.children) {
+      this.setState({ revealed: false });
+    }
+  }
+
+  componentDidUpdate (prevProps) {
+    if (!this.props.children && !!prevProps.children) {
+      this.getSiblings().forEach(sibling => sibling.removeAttribute('inert'));
+      this.activeElement.focus();
+      this.activeElement = null;
+    }
+    if (this.props.children) {
+      requestAnimationFrame(() => {
+        this.setState({ revealed: true });
+      });
+    }
+  }
+
+  componentWillUnmount () {
+    window.removeEventListener('keyup', this.handleKeyUp);
+  }
+
+  getSiblings = () => {
+    return Array(...this.node.parentElement.childNodes).filter(node => node !== this.node);
+  }
+
+  setRef = ref => {
+    this.node = ref;
+  }
+
+  render () {
+    const { children, onClose } = this.props;
+    const { revealed } = this.state;
+    const visible = !!children;
+
+    if (!visible) {
+      return (
+        <div className='modal-root' ref={this.setRef} style={{ opacity: 0 }} />
+      );
+    }
+
+    return (
+      <div className='modal-root' ref={this.setRef} style={{ opacity: revealed ? 1 : 0 }}>
+        <div style={{ pointerEvents: visible ? 'auto' : 'none' }}>
+          <div role='presentation' className='modal-root__overlay' onClick={onClose} />
+          <div role='dialog' className='modal-root__container'>{children}</div>
+        </div>
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/flavours/glitch/containers/media_galleries_container.js b/app/javascript/flavours/glitch/containers/media_galleries_container.js
new file mode 100644
index 00000000000..a694578821e
--- /dev/null
+++ b/app/javascript/flavours/glitch/containers/media_galleries_container.js
@@ -0,0 +1,68 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import PropTypes from 'prop-types';
+import { IntlProvider, addLocaleData } from 'react-intl';
+import { getLocale } from 'mastodon/locales';
+import MediaGallery from 'flavours/glitch/components/media_gallery';
+import ModalRoot from 'flavours/glitch/components/modal_root';
+import MediaModal from 'flavours/glitch/features/ui/components/media_modal';
+import { fromJS } from 'immutable';
+
+const { localeData, messages } = getLocale();
+addLocaleData(localeData);
+
+export default class MediaGalleriesContainer extends React.PureComponent {
+
+  static propTypes = {
+    locale: PropTypes.string.isRequired,
+    galleries: PropTypes.object.isRequired,
+  };
+
+  state = {
+    media: null,
+    index: null,
+  };
+
+  handleOpenMedia = (media, index) => {
+    document.body.classList.add('media-gallery-standalone__body');
+    this.setState({ media, index });
+  }
+
+  handleCloseMedia = () => {
+    document.body.classList.remove('media-gallery-standalone__body');
+    this.setState({ media: null, index: null });
+  }
+
+  render () {
+    const { locale, galleries } = this.props;
+
+    return (
+      <IntlProvider locale={locale} messages={messages}>
+        <React.Fragment>
+          {[].map.call(galleries, gallery => {
+            const { media, ...props } = JSON.parse(gallery.getAttribute('data-props'));
+
+            return ReactDOM.createPortal(
+              <MediaGallery
+                {...props}
+                media={fromJS(media)}
+                onOpenMedia={this.handleOpenMedia}
+              />,
+              gallery
+            );
+          })}
+          <ModalRoot onClose={this.handleCloseMedia}>
+            {this.state.media === null || this.state.index === null ? null : (
+              <MediaModal
+                media={this.state.media}
+                index={this.state.index}
+                onClose={this.handleCloseMedia}
+              />
+            )}
+          </ModalRoot>
+        </React.Fragment>
+      </IntlProvider>
+    );
+  }
+
+}
diff --git a/app/javascript/flavours/glitch/containers/media_gallery_container.js b/app/javascript/flavours/glitch/containers/media_gallery_container.js
deleted file mode 100644
index 54bfbf4535a..00000000000
--- a/app/javascript/flavours/glitch/containers/media_gallery_container.js
+++ /dev/null
@@ -1,34 +0,0 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import { IntlProvider, addLocaleData } from 'react-intl';
-import { getLocale } from 'mastodon/locales';
-import MediaGallery from 'flavours/glitch/components/media_gallery';
-import { fromJS } from 'immutable';
-
-const { localeData, messages } = getLocale();
-addLocaleData(localeData);
-
-export default class MediaGalleryContainer extends React.PureComponent {
-
-  static propTypes = {
-    locale: PropTypes.string.isRequired,
-    media: PropTypes.array.isRequired,
-  };
-
-  handleOpenMedia = () => {}
-
-  render () {
-    const { locale, media, ...props } = this.props;
-
-    return (
-      <IntlProvider locale={locale} messages={messages}>
-        <MediaGallery
-          {...props}
-          media={fromJS(media)}
-          onOpenMedia={this.handleOpenMedia}
-        />
-      </IntlProvider>
-    );
-  }
-
-}
diff --git a/app/javascript/flavours/glitch/features/ui/components/modal_root.js b/app/javascript/flavours/glitch/features/ui/components/modal_root.js
index e12ee1761d7..320c039a4df 100644
--- a/app/javascript/flavours/glitch/features/ui/components/modal_root.js
+++ b/app/javascript/flavours/glitch/features/ui/components/modal_root.js
@@ -1,5 +1,6 @@
 import React from 'react';
 import PropTypes from 'prop-types';
+import Base from '../../../components/modal_root';
 import BundleContainer from '../containers/bundle_container';
 import BundleModalError from './bundle_modal_error';
 import ModalLoading from './modal_loading';
@@ -43,56 +44,6 @@ export default class ModalRoot extends React.PureComponent {
     onClose: PropTypes.func.isRequired,
   };
 
-  state = {
-    revealed: false,
-  };
-
-  handleKeyUp = (e) => {
-    if ((e.key === 'Escape' || e.key === 'Esc' || e.keyCode === 27)
-         && !!this.props.type && !this.props.props.noEsc) {
-      this.props.onClose();
-    }
-  }
-
-  componentDidMount () {
-    window.addEventListener('keyup', this.handleKeyUp, false);
-  }
-
-  componentWillReceiveProps (nextProps) {
-    if (!!nextProps.type && !this.props.type) {
-      this.activeElement = document.activeElement;
-
-      this.getSiblings().forEach(sibling => sibling.setAttribute('inert', true));
-    } else if (!nextProps.type) {
-      this.setState({ revealed: false });
-    }
-  }
-
-  componentDidUpdate (prevProps) {
-    if (!this.props.type && !!prevProps.type) {
-      this.getSiblings().forEach(sibling => sibling.removeAttribute('inert'));
-      this.activeElement.focus();
-      this.activeElement = null;
-    }
-    if (this.props.type) {
-      requestAnimationFrame(() => {
-        this.setState({ revealed: true });
-      });
-    }
-  }
-
-  componentWillUnmount () {
-    window.removeEventListener('keyup', this.handleKeyUp);
-  }
-
-  getSiblings = () => {
-    return Array(...this.node.parentElement.childNodes).filter(node => node !== this.node);
-  }
-
-  setRef = ref => {
-    this.node = ref;
-  }
-
   renderLoading = modalId => () => {
     return ['MEDIA', 'VIDEO', 'BOOST', 'FAVOURITE', 'DOODLE', 'CONFIRM', 'ACTIONS'].indexOf(modalId) === -1 ? <ModalLoading /> : null;
   }
@@ -105,30 +56,16 @@ export default class ModalRoot extends React.PureComponent {
 
   render () {
     const { type, props, onClose } = this.props;
-    const { revealed } = this.state;
     const visible = !!type;
 
-    if (!visible) {
-      return (
-        <div className='modal-root' ref={this.setRef} style={{ opacity: 0 }} />
-      );
-    }
-
     return (
-      <div className='modal-root' ref={this.setRef} style={{ opacity: revealed ? 1 : 0 }}>
-        <div style={{ pointerEvents: visible ? 'auto' : 'none' }}>
-          <div role='presentation' className='modal-root__overlay' onClick={onClose} />
-          <div role='dialog' className='modal-root__container'>
-            {
-              visible ?
-                (<BundleContainer fetchComponent={MODAL_COMPONENTS[type]} loading={this.renderLoading(type)} error={this.renderError} renderDelay={200}>
-                  {(SpecificComponent) => <SpecificComponent {...props} onClose={onClose} />}
-                </BundleContainer>) :
-                null
-            }
-          </div>
-        </div>
-      </div>
+      <Base onClose={onClose}>
+        {visible && (
+          <BundleContainer fetchComponent={MODAL_COMPONENTS[type]} loading={this.renderLoading(type)} error={this.renderError} renderDelay={200}>
+            {(SpecificComponent) => <SpecificComponent {...props} onClose={onClose} />}
+          </BundleContainer>
+        )}
+      </Base>
     );
   }
 
diff --git a/app/javascript/flavours/glitch/packs/public.js b/app/javascript/flavours/glitch/packs/public.js
index 9ea82b53aa2..ed685b6b767 100644
--- a/app/javascript/flavours/glitch/packs/public.js
+++ b/app/javascript/flavours/glitch/packs/public.js
@@ -7,7 +7,6 @@ function main() {
   const { getLocale } = require('locales');
   const { localeData } = getLocale();
   const VideoContainer = require('flavours/glitch/containers/video_container').default;
-  const MediaGalleryContainer = require('flavours/glitch/containers/media_gallery_container').default;
   const CardContainer = require('flavours/glitch/containers/card_container').default;
   const React = require('react');
   const ReactDOM = require('react-dom');
@@ -58,15 +57,20 @@ function main() {
       ReactDOM.render(<VideoContainer locale={locale} {...props} />, content);
     });
 
-    [].forEach.call(document.querySelectorAll('[data-component="MediaGallery"]'), (content) => {
-      const props = JSON.parse(content.getAttribute('data-props'));
-      ReactDOM.render(<MediaGalleryContainer locale={locale} {...props} />, content);
-    });
-
     [].forEach.call(document.querySelectorAll('[data-component="Card"]'), (content) => {
       const props = JSON.parse(content.getAttribute('data-props'));
       ReactDOM.render(<CardContainer locale={locale} {...props} />, content);
     });
+
+    const mediaGalleries = document.querySelectorAll('[data-component="MediaGallery"]');
+
+    if (mediaGalleries.length > 0) {
+      const MediaGalleriesContainer = require('flavours/glitch/containers/media_galleries_container').default;
+      const content = document.createElement('div');
+
+      ReactDOM.render(<MediaGalleriesContainer locale={locale} galleries={mediaGalleries} />, content);
+      document.body.appendChild(content);
+    }
   });
 }
 
diff --git a/app/javascript/flavours/glitch/styles/components/modal.scss b/app/javascript/flavours/glitch/styles/components/modal.scss
index 4f0d6e1bc20..2eb80aba83b 100644
--- a/app/javascript/flavours/glitch/styles/components/modal.scss
+++ b/app/javascript/flavours/glitch/styles/components/modal.scss
@@ -3,13 +3,14 @@
 }
 
 .modal-root {
+  position: relative;
   transition: opacity 0.3s linear;
   will-change: opacity;
   z-index: 9999;
 }
 
 .modal-root__overlay {
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   right: 0;
@@ -18,7 +19,7 @@
 }
 
 .modal-root__container {
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   width: 100%;
diff --git a/app/javascript/flavours/glitch/styles/containers.scss b/app/javascript/flavours/glitch/styles/containers.scss
index 6fa1fa38f51..e761f58eb28 100644
--- a/app/javascript/flavours/glitch/styles/containers.scss
+++ b/app/javascript/flavours/glitch/styles/containers.scss
@@ -60,6 +60,10 @@
   }
 }
 
+.media-gallery-standalone__body {
+  overflow: hidden;
+}
+
 .account-header {
   width: 400px;
   margin: 0 auto;