diff --git a/app/javascript/flavours/glitch/components/attachment_list.js b/app/javascript/flavours/glitch/components/attachment_list.js
index 08124d9805..68d8d29c7f 100644
--- a/app/javascript/flavours/glitch/components/attachment_list.js
+++ b/app/javascript/flavours/glitch/components/attachment_list.js
@@ -25,7 +25,7 @@ export default class AttachmentList extends ImmutablePureComponent {
 
               return (
                 <li key={attachment.get('id')}>
-                  <a href={displayUrl} target='_blank' rel='noopener'><Icon id='link' /> {filename(displayUrl)}</a>
+                  <a href={displayUrl} target='_blank' rel='noopener noreferrer'><Icon id='link' /> {filename(displayUrl)}</a>
                 </li>
               );
             })}
@@ -46,7 +46,7 @@ export default class AttachmentList extends ImmutablePureComponent {
 
             return (
               <li key={attachment.get('id')}>
-                <a href={displayUrl} target='_blank' rel='noopener'>{filename(displayUrl)}</a>
+                <a href={displayUrl} target='_blank' rel='noopener noreferrer'>{filename(displayUrl)}</a>
               </li>
             );
           })}
diff --git a/app/javascript/flavours/glitch/components/display_name.js b/app/javascript/flavours/glitch/components/display_name.js
index 9d8c4a775e..44662a8b87 100644
--- a/app/javascript/flavours/glitch/components/display_name.js
+++ b/app/javascript/flavours/glitch/components/display_name.js
@@ -78,6 +78,7 @@ export default class DisplayName extends React.PureComponent {
           target='_blank'
           onClick={(e) => onAccountClick(a.get('id'), e)}
           title={`@${a.get('acct')}`}
+          rel='noopener noreferrer'
         >
           <bdi key={a.get('id')}>
             <strong className='display-name__html' dangerouslySetInnerHTML={{ __html: a.get('display_name_html') }} />
@@ -90,7 +91,7 @@ export default class DisplayName extends React.PureComponent {
       }
 
       suffix = (
-        <a href={account.get('url')} target='_blank' onClick={(e) => onAccountClick(account.get('id'), e)}>
+        <a href={account.get('url')} target='_blank' onClick={(e) => onAccountClick(account.get('id'), e)} rel='noopener noreferrer'>
           <span className='display-name__account'>@{acct}</span>
         </a>
       );
diff --git a/app/javascript/flavours/glitch/components/dropdown_menu.js b/app/javascript/flavours/glitch/components/dropdown_menu.js
index 39d7ba50cf..ab5b7a572d 100644
--- a/app/javascript/flavours/glitch/components/dropdown_menu.js
+++ b/app/javascript/flavours/glitch/components/dropdown_menu.js
@@ -143,7 +143,7 @@ class DropdownMenu extends React.PureComponent {
 
     return (
       <li className='dropdown-menu__item' key={`${text}-${i}`}>
-        <a href={href} target='_blank' rel='noopener' role='button' tabIndex='0' ref={i === 0 ? this.setFocusRef : null} onClick={this.handleClick} onKeyPress={this.handleItemKeyPress} data-index={i}>
+        <a href={href} target='_blank' rel='noopener noreferrer' role='button' tabIndex='0' ref={i === 0 ? this.setFocusRef : null} onClick={this.handleClick} onKeyPress={this.handleItemKeyPress} data-index={i}>
           {text}
         </a>
       </li>
diff --git a/app/javascript/flavours/glitch/components/error_boundary.js b/app/javascript/flavours/glitch/components/error_boundary.js
index dd21f29305..62950a7d39 100644
--- a/app/javascript/flavours/glitch/components/error_boundary.js
+++ b/app/javascript/flavours/glitch/components/error_boundary.js
@@ -56,7 +56,7 @@ export default class ErrorBoundary extends React.PureComponent {
               <FormattedMessage
                 id='web_app_crash.report_issue'
                 defaultMessage='Report a bug in the {issuetracker}'
-                values={{ issuetracker: <a href='https://github.com/glitch-soc/mastodon/issues' rel='noopener' target='_blank'><FormattedMessage id='web_app_crash.issue_tracker' defaultMessage='issue tracker' /></a> }}
+                values={{ issuetracker: <a href='https://github.com/glitch-soc/mastodon/issues' rel='noopener noreferrer' target='_blank'><FormattedMessage id='web_app_crash.issue_tracker' defaultMessage='issue tracker' /></a> }}
               />
               { debugInfo !== '' && (
                 <details>
diff --git a/app/javascript/flavours/glitch/components/media_gallery.js b/app/javascript/flavours/glitch/components/media_gallery.js
index a5a89e2f14..85ee79e11f 100644
--- a/app/javascript/flavours/glitch/components/media_gallery.js
+++ b/app/javascript/flavours/glitch/components/media_gallery.js
@@ -179,7 +179,7 @@ class Item extends React.PureComponent {
     if (attachment.get('type') === 'unknown') {
       return (
         <div className={classNames('media-gallery__item', { standalone })} key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
-          <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url') || attachment.get('url')} target='_blank' style={{ cursor: 'pointer' }} title={attachment.get('description')}>
+          <a className='media-gallery__item-thumbnail' href={attachment.get('remote_url') || attachment.get('url')} style={{ cursor: 'pointer' }} title={attachment.get('description')} target='_blank' rel='noopener noreferrer'>
             <canvas width={32} height={32} ref={this.setCanvasRef} className='media-gallery__preview' />
           </a>
         </div>
@@ -207,6 +207,7 @@ class Item extends React.PureComponent {
           href={attachment.get('remote_url') || originalUrl}
           onClick={this.handleClick}
           target='_blank'
+          rel='noopener noreferrer'
         >
           <img
             className={letterbox ? 'letterbox' : null}
diff --git a/app/javascript/flavours/glitch/components/status_content.js b/app/javascript/flavours/glitch/components/status_content.js
index da8b787ba7..2c79de4db6 100644
--- a/app/javascript/flavours/glitch/components/status_content.js
+++ b/app/javascript/flavours/glitch/components/status_content.js
@@ -133,7 +133,7 @@ export default class StatusContent extends React.PureComponent {
       }
 
       link.setAttribute('target', '_blank');
-      link.setAttribute('rel', 'noopener');
+      link.setAttribute('rel', 'noopener noreferrer');
     }
   }
 
diff --git a/app/javascript/flavours/glitch/components/status_header.js b/app/javascript/flavours/glitch/components/status_header.js
index 23cff286af..06296e124e 100644
--- a/app/javascript/flavours/glitch/components/status_header.js
+++ b/app/javascript/flavours/glitch/components/status_header.js
@@ -56,6 +56,7 @@ export default class StatusHeader extends React.PureComponent {
             target='_blank'
             className='status__avatar'
             onClick={this.handleAccountClick}
+            rel='noopener noreferrer'
           >
             {statusAvatar}
           </a>
@@ -64,6 +65,7 @@ export default class StatusHeader extends React.PureComponent {
             target='_blank'
             className='status__display-name'
             onClick={this.handleAccountClick}
+            rel='noopener noreferrer'
           >
             <DisplayName account={account} others={otherAccounts} />
           </a>
diff --git a/app/javascript/flavours/glitch/features/account/components/header.js b/app/javascript/flavours/glitch/features/account/components/header.js
index 0d131bd356..e65a68b4d2 100644
--- a/app/javascript/flavours/glitch/features/account/components/header.js
+++ b/app/javascript/flavours/glitch/features/account/components/header.js
@@ -247,7 +247,7 @@ class Header extends ImmutablePureComponent {
 
         <div className='account__header__bar'>
           <div className='account__header__tabs'>
-            <a className='avatar' href={account.get('url')} rel='noopener' target='_blank'>
+            <a className='avatar' href={account.get('url')} rel='noopener noreferrer' target='_blank'>
               <Avatar account={account} size={90} />
             </a>
 
@@ -276,10 +276,10 @@ class Header extends ImmutablePureComponent {
                       <dt dangerouslySetInnerHTML={{ __html: proof.get('provider') }} />
 
                       <dd className='verified'>
-                        <a href={proof.get('proof_url')} target='_blank' rel='noopener'><span title={intl.formatMessage(messages.linkVerifiedOn, { date: intl.formatDate(proof.get('updated_at'), dateFormatOptions) })}>
+                        <a href={proof.get('proof_url')} target='_blank' rel='noopener noreferrer'><span title={intl.formatMessage(messages.linkVerifiedOn, { date: intl.formatDate(proof.get('updated_at'), dateFormatOptions) })}>
                           <Icon id='check' className='verified__mark' />
                         </span></a>
-                        <a href={proof.get('profile_url')} target='_blank' rel='noopener'><span dangerouslySetInnerHTML={{ __html: ' '+proof.get('provider_username') }} /></a>
+                        <a href={proof.get('profile_url')} target='_blank' rel='noopener noreferrer'><span dangerouslySetInnerHTML={{ __html: ' '+proof.get('provider_username') }} /></a>
                       </dd>
                     </dl>
                   ))}
diff --git a/app/javascript/flavours/glitch/features/account_gallery/components/media_item.js b/app/javascript/flavours/glitch/features/account_gallery/components/media_item.js
index 6d07ec48c5..f1cb3f9e42 100644
--- a/app/javascript/flavours/glitch/features/account_gallery/components/media_item.js
+++ b/app/javascript/flavours/glitch/features/account_gallery/components/media_item.js
@@ -1,12 +1,12 @@
-import React from 'react';
-import PropTypes from 'prop-types';
-import ImmutablePropTypes from 'react-immutable-proptypes';
-import ImmutablePureComponent from 'react-immutable-pure-component';
+import { decode } from 'blurhash';
+import classNames from 'classnames';
 import Icon from 'flavours/glitch/components/icon';
 import { autoPlayGif, displayMedia } from 'flavours/glitch/util/initial_state';
-import classNames from 'classnames';
-import { decode } from 'blurhash';
 import { isIOS } from 'flavours/glitch/util/is_mobile';
+import PropTypes from 'prop-types';
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import ImmutablePureComponent from 'react-immutable-pure-component';
 
 export default class MediaItem extends ImmutablePureComponent {
 
@@ -148,7 +148,7 @@ export default class MediaItem extends ImmutablePureComponent {
 
     return (
       <div className='account-gallery__item' style={{ width, height }}>
-        <a className='media-gallery__item-thumbnail' href={status.get('url')} target='_blank' onClick={this.handleClick} title={title}>
+        <a className='media-gallery__item-thumbnail' href={status.get('url')} onClick={this.handleClick} title={title} target='_blank' rel='noopener noreferrer'>
           <canvas width={32} height={32} ref={this.setCanvasRef} className={classNames('media-gallery__preview', { 'media-gallery__preview--hidden': visible && loaded })} />
           {visible ? thumbnail : icon}
         </a>
diff --git a/app/javascript/flavours/glitch/features/status/components/card.js b/app/javascript/flavours/glitch/features/status/components/card.js
index f5ce1b766e..7352dc6b48 100644
--- a/app/javascript/flavours/glitch/features/status/components/card.js
+++ b/app/javascript/flavours/glitch/features/status/components/card.js
@@ -140,7 +140,7 @@ export default class Card extends React.PureComponent {
     const horizontal  = (!compact && card.get('width') > card.get('height') && (card.get('width') + 100 >= width)) || card.get('type') !== 'link' || embedded;
     const interactive = card.get('type') !== 'link';
     const className   = classnames('status-card', { horizontal, compact, interactive });
-    const title       = interactive ? <a className='status-card__title' href={card.get('url')} title={card.get('title')} rel='noopener' target='_blank'><strong>{card.get('title')}</strong></a> : <strong className='status-card__title' title={card.get('title')}>{card.get('title')}</strong>;
+    const title       = interactive ? <a className='status-card__title' href={card.get('url')} title={card.get('title')} rel='noopener noreferrer' target='_blank'><strong>{card.get('title')}</strong></a> : <strong className='status-card__title' title={card.get('title')}>{card.get('title')}</strong>;
     const ratio       = card.get('width') / card.get('height');
     const height      = (compact && !embedded) ? (width / (16 / 9)) : (width / ratio);
 
@@ -172,7 +172,7 @@ export default class Card extends React.PureComponent {
             <div className='status-card__actions'>
               <div>
                 <button onClick={this.handleEmbedClick}><Icon id={iconVariant} /></button>
-                {horizontal && <a href={card.get('url')} target='_blank' rel='noopener'><Icon id='external-link' /></a>}
+                {horizontal && <a href={card.get('url')} target='_blank' rel='noopener noreferrer'><Icon id='external-link' /></a>}
               </div>
             </div>
           </div>
@@ -200,7 +200,7 @@ export default class Card extends React.PureComponent {
     }
 
     return (
-      <a href={card.get('url')} className={className} target='_blank' rel='noopener' ref={this.setRef}>
+      <a href={card.get('url')} className={className} target='_blank' rel='noopener noreferrer' ref={this.setRef}>
         {embed}
         {description}
       </a>
diff --git a/app/javascript/flavours/glitch/features/status/components/detailed_status.js b/app/javascript/flavours/glitch/features/status/components/detailed_status.js
index f7d71eec2c..898011c881 100644
--- a/app/javascript/flavours/glitch/features/status/components/detailed_status.js
+++ b/app/javascript/flavours/glitch/features/status/components/detailed_status.js
@@ -188,7 +188,7 @@ export default class DetailedStatus extends ImmutablePureComponent {
     }
 
     if (status.get('application')) {
-      applicationLink = <span> · <a className='detailed-status__application' href={status.getIn(['application', 'website'])} target='_blank' rel='noopener'>{status.getIn(['application', 'name'])}</a></span>;
+      applicationLink = <span> · <a className='detailed-status__application' href={status.getIn(['application', 'website'])} target='_blank' rel='noopener noreferrer'>{status.getIn(['application', 'name'])}</a></span>;
     }
 
     if (status.get('visibility') === 'direct') {
@@ -262,7 +262,7 @@ export default class DetailedStatus extends ImmutablePureComponent {
           />
 
           <div className='detailed-status__meta'>
-            <a className='detailed-status__datetime' href={status.get('url')} target='_blank' rel='noopener'>
+            <a className='detailed-status__datetime' href={status.get('url')} target='_blank' rel='noopener noreferrer'>
               <FormattedDate value={new Date(status.get('created_at'))} hour12={false} year='numeric' month='short' day='2-digit' hour='2-digit' minute='2-digit' />
             </a>{applicationLink} · {reblogLink} · {favouriteLink} · <VisibilityIcon visibility={status.get('visibility')} />
           </div>
diff --git a/app/javascript/flavours/glitch/features/ui/components/actions_modal.js b/app/javascript/flavours/glitch/features/ui/components/actions_modal.js
index 9e63f653ad..24169036ca 100644
--- a/app/javascript/flavours/glitch/features/ui/components/actions_modal.js
+++ b/app/javascript/flavours/glitch/features/ui/components/actions_modal.js
@@ -92,12 +92,12 @@ export default class ActionsModal extends ImmutablePureComponent {
       <div className='status light'>
         <div className='boost-modal__status-header'>
           <div className='boost-modal__status-time'>
-            <a href={this.props.status.get('url')} className='status__relative-time' target='_blank' rel='noopener'>
+            <a href={this.props.status.get('url')} className='status__relative-time' target='_blank' rel='noopener noreferrer'>
               <RelativeTimestamp timestamp={this.props.status.get('created_at')} />
             </a>
           </div>
 
-          <a href={this.props.status.getIn(['account', 'url'])} className='status__display-name'>
+          <a href={this.props.status.getIn(['account', 'url'])} className='status__display-name' rel='noopener noreferrer'>
             <div className='status__avatar'>
               <Avatar account={this.props.status.get('account')} size={48} />
             </div>
diff --git a/app/javascript/flavours/glitch/features/ui/components/boost_modal.js b/app/javascript/flavours/glitch/features/ui/components/boost_modal.js
index 3421b953ab..cd2929fdb2 100644
--- a/app/javascript/flavours/glitch/features/ui/components/boost_modal.js
+++ b/app/javascript/flavours/glitch/features/ui/components/boost_modal.js
@@ -64,7 +64,7 @@ class BoostModal extends ImmutablePureComponent {
           <div className='status light'>
             <div className='boost-modal__status-header'>
               <div className='boost-modal__status-time'>
-                <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
+                <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener noreferrer'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
               </div>
 
               <a onClick={this.handleAccountClick} href={status.getIn(['account', 'url'])} className='status__display-name'>
diff --git a/app/javascript/flavours/glitch/features/ui/components/link_footer.js b/app/javascript/flavours/glitch/features/ui/components/link_footer.js
index 588e89a6ad..4d7fc36c25 100644
--- a/app/javascript/flavours/glitch/features/ui/components/link_footer.js
+++ b/app/javascript/flavours/glitch/features/ui/components/link_footer.js
@@ -60,8 +60,8 @@ class LinkFooter extends React.PureComponent {
             id='getting_started.open_source_notice'
             defaultMessage='Glitchsoc is open source software, a friendly fork of {Mastodon}. You can contribute or report issues on GitHub at {github}.'
             values={{
-              github: <span><a href='https://github.com/glitch-soc/mastodon' rel='noopener' target='_blank'>glitch-soc/mastodon</a> (v{version})</span>,
-              Mastodon: <a href='https://github.com/tootsuite/mastodon' rel='noopener' target='_blank'>Mastodon</a> }}
+              github: <span><a href='https://github.com/glitch-soc/mastodon' rel='noopener noreferrer' target='_blank'>glitch-soc/mastodon</a> (v{version})</span>,
+              Mastodon: <a href='https://github.com/tootsuite/mastodon' rel='noopener noreferrer' target='_blank'>Mastodon</a> }}
           />
         </p>
       </div>