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-rw-r--r--app/javascript/flavours/glitch/actions/accounts.js22
-rw-r--r--app/javascript/flavours/glitch/actions/markers.js2
-rw-r--r--app/javascript/flavours/glitch/actions/notifications.js2
-rw-r--r--app/javascript/flavours/glitch/components/error_boundary.js10
-rw-r--r--app/javascript/flavours/glitch/components/status.js1
-rw-r--r--app/javascript/flavours/glitch/components/status_prepend.js30
-rw-r--r--app/javascript/flavours/glitch/features/account/components/action_bar.js13
-rw-r--r--app/javascript/flavours/glitch/features/account/components/header.js88
-rw-r--r--app/javascript/flavours/glitch/features/account_gallery/index.js28
-rw-r--r--app/javascript/flavours/glitch/features/account_timeline/components/header.js5
-rw-r--r--app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js12
-rw-r--r--app/javascript/flavours/glitch/features/account_timeline/index.js12
-rw-r--r--app/javascript/flavours/glitch/features/notifications/components/filter_bar.js8
-rw-r--r--app/javascript/flavours/glitch/features/notifications/components/notification.js22
-rw-r--r--app/javascript/flavours/glitch/features/notifications/index.js2
-rw-r--r--app/javascript/flavours/glitch/features/ui/index.js31
-rw-r--r--app/javascript/flavours/glitch/reducers/relationships.js12
-rw-r--r--app/javascript/flavours/glitch/styles/components/accounts.scss4
-rw-r--r--app/javascript/flavours/glitch/styles/contrast/diff.scss9
-rw-r--r--app/javascript/flavours/glitch/util/emoji/index.js2
-rw-r--r--app/javascript/mastodon/actions/accounts.js4
-rw-r--r--app/javascript/mastodon/actions/markers.js43
-rw-r--r--app/javascript/mastodon/actions/notifications.js4
-rw-r--r--app/javascript/mastodon/actions/picture_in_picture.js38
-rw-r--r--app/javascript/mastodon/components/animated_number.js17
-rw-r--r--app/javascript/mastodon/components/error_boundary.js20
-rw-r--r--app/javascript/mastodon/components/icon_button.js11
-rw-r--r--app/javascript/mastodon/components/intersection_observer_article.js12
-rw-r--r--app/javascript/mastodon/components/picture_in_picture_placeholder.js69
-rw-r--r--app/javascript/mastodon/components/status.js24
-rw-r--r--app/javascript/mastodon/components/status_action_bar.js13
-rw-r--r--app/javascript/mastodon/containers/status_container.js6
-rw-r--r--app/javascript/mastodon/features/account/components/header.js76
-rw-r--r--app/javascript/mastodon/features/account_gallery/index.js31
-rw-r--r--app/javascript/mastodon/features/account_timeline/components/header.js5
-rw-r--r--app/javascript/mastodon/features/account_timeline/containers/header_container.js12
-rw-r--r--app/javascript/mastodon/features/account_timeline/index.js8
-rw-r--r--app/javascript/mastodon/features/audio/index.js47
-rw-r--r--app/javascript/mastodon/features/emoji/emoji.js2
-rw-r--r--app/javascript/mastodon/features/notifications/components/filter_bar.js8
-rw-r--r--app/javascript/mastodon/features/notifications/components/notification.js58
-rw-r--r--app/javascript/mastodon/features/notifications/index.js41
-rw-r--r--app/javascript/mastodon/features/picture_in_picture/components/footer.js137
-rw-r--r--app/javascript/mastodon/features/picture_in_picture/components/header.js40
-rw-r--r--app/javascript/mastodon/features/picture_in_picture/index.js85
-rw-r--r--app/javascript/mastodon/features/status/components/detailed_status.js8
-rw-r--r--app/javascript/mastodon/features/status/index.js5
-rw-r--r--app/javascript/mastodon/features/ui/components/media_modal.js2
-rw-r--r--app/javascript/mastodon/features/ui/components/video_modal.js4
-rw-r--r--app/javascript/mastodon/features/ui/index.js6
-rw-r--r--app/javascript/mastodon/features/video/index.js53
-rw-r--r--app/javascript/mastodon/reducers/index.js2
-rw-r--r--app/javascript/mastodon/reducers/notifications.js111
-rw-r--r--app/javascript/mastodon/reducers/picture_in_picture.js22
-rw-r--r--app/javascript/styles/contrast/diff.scss5
-rw-r--r--app/javascript/styles/mastodon/components.scss149
56 files changed, 1274 insertions, 219 deletions
diff --git a/app/javascript/flavours/glitch/actions/accounts.js b/app/javascript/flavours/glitch/actions/accounts.js
index e1012a80b..428b62f68 100644
--- a/app/javascript/flavours/glitch/actions/accounts.js
+++ b/app/javascript/flavours/glitch/actions/accounts.js
@@ -126,15 +126,17 @@ export function fetchAccountFail(id, error) {
   };
 };
 
-export function followAccount(id, reblogs = true) {
+export function followAccount(id, options = { reblogs: true }) {
   return (dispatch, getState) => {
     const alreadyFollowing = getState().getIn(['relationships', id, 'following']);
-    dispatch(followAccountRequest(id));
+    const locked = getState().getIn(['accounts', id, 'locked'], false);
 
-    api(getState).post(`/api/v1/accounts/${id}/follow`, { reblogs }).then(response => {
+    dispatch(followAccountRequest(id, locked));
+
+    api(getState).post(`/api/v1/accounts/${id}/follow`, options).then(response => {
       dispatch(followAccountSuccess(response.data, alreadyFollowing));
     }).catch(error => {
-      dispatch(followAccountFail(error));
+      dispatch(followAccountFail(error, locked));
     });
   };
 };
@@ -151,10 +153,12 @@ export function unfollowAccount(id) {
   };
 };
 
-export function followAccountRequest(id) {
+export function followAccountRequest(id, locked) {
   return {
     type: ACCOUNT_FOLLOW_REQUEST,
     id,
+    locked,
+    skipLoading: true,
   };
 };
 
@@ -163,13 +167,16 @@ export function followAccountSuccess(relationship, alreadyFollowing) {
     type: ACCOUNT_FOLLOW_SUCCESS,
     relationship,
     alreadyFollowing,
+    skipLoading: true,
   };
 };
 
-export function followAccountFail(error) {
+export function followAccountFail(error, locked) {
   return {
     type: ACCOUNT_FOLLOW_FAIL,
     error,
+    locked,
+    skipLoading: true,
   };
 };
 
@@ -177,6 +184,7 @@ export function unfollowAccountRequest(id) {
   return {
     type: ACCOUNT_UNFOLLOW_REQUEST,
     id,
+    skipLoading: true,
   };
 };
 
@@ -185,6 +193,7 @@ export function unfollowAccountSuccess(relationship, statuses) {
     type: ACCOUNT_UNFOLLOW_SUCCESS,
     relationship,
     statuses,
+    skipLoading: true,
   };
 };
 
@@ -192,6 +201,7 @@ export function unfollowAccountFail(error) {
   return {
     type: ACCOUNT_UNFOLLOW_FAIL,
     error,
+    skipLoading: true,
   };
 };
 
diff --git a/app/javascript/flavours/glitch/actions/markers.js b/app/javascript/flavours/glitch/actions/markers.js
index 6b49ebf88..80bcada6e 100644
--- a/app/javascript/flavours/glitch/actions/markers.js
+++ b/app/javascript/flavours/glitch/actions/markers.js
@@ -60,7 +60,7 @@ export const synchronouslySubmitMarkers = () => (dispatch, getState) => {
 const _buildParams = (state) => {
   const params = {};
 
-  const lastHomeId         = state.getIn(['timelines', 'home', 'items', 0]);
+  const lastHomeId         = state.getIn(['timelines', 'home', 'items']).find(item => item !== null);
   const lastNotificationId = state.getIn(['notifications', 'lastReadId']);
 
   if (lastHomeId && compareId(lastHomeId, state.getIn(['markers', 'home'])) > 0) {
diff --git a/app/javascript/flavours/glitch/actions/notifications.js b/app/javascript/flavours/glitch/actions/notifications.js
index ccc427c29..7f311153b 100644
--- a/app/javascript/flavours/glitch/actions/notifications.js
+++ b/app/javascript/flavours/glitch/actions/notifications.js
@@ -73,7 +73,7 @@ export function updateNotifications(notification, intlMessages, intlLocale) {
 
     let filtered = false;
 
-    if (notification.type === 'mention') {
+    if (['mention', 'status'].includes(notification.type)) {
       const dropRegex   = filters[0];
       const regex       = filters[1];
       const searchIndex = searchTextFromRawStatus(notification.status);
diff --git a/app/javascript/flavours/glitch/components/error_boundary.js b/app/javascript/flavours/glitch/components/error_boundary.js
index 8998802b1..8e6cd1461 100644
--- a/app/javascript/flavours/glitch/components/error_boundary.js
+++ b/app/javascript/flavours/glitch/components/error_boundary.js
@@ -48,6 +48,8 @@ export default class ErrorBoundary extends React.PureComponent {
 
     if (!hasError) return this.props.children;
 
+    const likelyBrowserAddonIssue = errorMessage && errorMessage.includes('NotFoundError');
+
     let debugInfo = '';
     if (stackTrace) {
       debugInfo += 'Stack trace\n-----------\n\n```\n' + errorMessage + '\n' + stackTrace.toString() + '\n```';
@@ -70,6 +72,14 @@ export default class ErrorBoundary extends React.PureComponent {
             <FormattedMessage id='web_app_crash.content' defaultMessage='You could try any of the following:' />
           </p>
           <ul>
+            { likelyBrowserAddonIssue && (
+              <li>
+                <FormattedMessage
+                  id='web_app_crash.disable_addons'
+                  defaultMessage='Disable browser add-ons or built-in translation tools'
+                />
+              </li>
+            ) }
             <li>
               <FormattedMessage
                 id='web_app_crash.report_issue'
diff --git a/app/javascript/flavours/glitch/components/status.js b/app/javascript/flavours/glitch/components/status.js
index 8da5db961..fc7940e5a 100644
--- a/app/javascript/flavours/glitch/components/status.js
+++ b/app/javascript/flavours/glitch/components/status.js
@@ -680,6 +680,7 @@ class Status extends ImmutablePureComponent {
         favourite: 'favourited',
         reblog: 'boosted',
         reblogged_by: 'boosted',
+        status: 'posted',
       }[prepend];
 
       selectorAttribs[`data-${notifKind}-by`] = `@${account.get('acct')}`;
diff --git a/app/javascript/flavours/glitch/components/status_prepend.js b/app/javascript/flavours/glitch/components/status_prepend.js
index 637c4f23a..0ba55d5d8 100644
--- a/app/javascript/flavours/glitch/components/status_prepend.js
+++ b/app/javascript/flavours/glitch/components/status_prepend.js
@@ -64,6 +64,14 @@ export default class StatusPrepend extends React.PureComponent {
           values={{ name : link }}
         />
       );
+    case 'status':
+      return (
+        <FormattedMessage
+          id='notification.status'
+          defaultMessage='{name} just posted'
+          values={{ name: link }}
+        />
+      );
     case 'poll':
       if (me === account.get('id')) {
         return (
@@ -88,12 +96,32 @@ export default class StatusPrepend extends React.PureComponent {
     const { Message } = this;
     const { type } = this.props;
 
+    let iconId;
+
+    switch(type) {
+    case 'favourite':
+      iconId = 'star';
+      break;
+    case 'featured':
+      iconId = 'thumb-tack';
+      break;
+    case 'poll':
+      iconId = 'tasks';
+      break;
+    case 'reblogged_by':
+      iconId = 'retweet';
+      break;
+    case 'status':
+      iconId = 'bell';
+      break;
+    };
+
     return !type ? null : (
       <aside className={type === 'reblogged_by' || type === 'featured' ? 'status__prepend' : 'notification__message'}>
         <div className={type === 'reblogged_by' || type === 'featured' ? 'status__prepend-icon-wrapper' : 'notification__favourite-icon-wrapper'}>
           <Icon
             className={`status__prepend-icon ${type === 'favourite' ? 'star-icon' : ''}`}
-            id={type === 'favourite' ? 'star' : (type === 'featured' ? 'thumb-tack' : (type === 'poll' ? 'tasks' : 'retweet'))}
+            id={iconId}
           />
         </div>
         <Message />
diff --git a/app/javascript/flavours/glitch/features/account/components/action_bar.js b/app/javascript/flavours/glitch/features/account/components/action_bar.js
index 6576bff8e..2d4cc7f49 100644
--- a/app/javascript/flavours/glitch/features/account/components/action_bar.js
+++ b/app/javascript/flavours/glitch/features/account/components/action_bar.js
@@ -26,6 +26,19 @@ class ActionBar extends React.PureComponent {
   render () {
     const { account, intl } = this.props;
 
+    if (account.get('suspended')) {
+      return (
+        <div>
+          <div className='account__disclaimer'>
+            <Icon id='info-circle' fixedWidth /> <FormattedMessage
+              id='account.suspended_disclaimer_full'
+              defaultMessage="This user has been suspended by a moderator."
+            />
+          </div>
+        </div>
+      );
+    }
+
     let extraInfo = '';
 
     if (account.get('acct') !== account.get('username')) {
diff --git a/app/javascript/flavours/glitch/features/account/components/header.js b/app/javascript/flavours/glitch/features/account/components/header.js
index 0af0935e6..9b080a14e 100644
--- a/app/javascript/flavours/glitch/features/account/components/header.js
+++ b/app/javascript/flavours/glitch/features/account/components/header.js
@@ -7,6 +7,7 @@ import { autoPlayGif, me, isStaff } from 'flavours/glitch/util/initial_state';
 import { preferencesLink, profileLink, accountAdminLink } from 'flavours/glitch/util/backend_links';
 import classNames from 'classnames';
 import Icon from 'flavours/glitch/components/icon';
+import IconButton from 'flavours/glitch/components/icon_button';
 import Avatar from 'flavours/glitch/components/avatar';
 import Button from 'flavours/glitch/components/button';
 import { NavLink } from 'react-router-dom';
@@ -34,6 +35,8 @@ const messages = defineMessages({
   unblockDomain: { id: 'account.unblock_domain', defaultMessage: 'Unblock domain {domain}' },
   hideReblogs: { id: 'account.hide_reblogs', defaultMessage: 'Hide boosts from @{name}' },
   showReblogs: { id: 'account.show_reblogs', defaultMessage: 'Show boosts from @{name}' },
+  enableNotifications: { id: 'account.enable_notifications', defaultMessage: 'Notify me when @{name} posts' },
+  disableNotifications: { id: 'account.disable_notifications', defaultMessage: 'Stop notifying me when @{name} posts' },
   pins: { id: 'navigation_bar.pins', defaultMessage: 'Pinned toots' },
   preferences: { id: 'navigation_bar.preferences', defaultMessage: 'Preferences' },
   follow_requests: { id: 'navigation_bar.follow_requests', defaultMessage: 'Follow requests' },
@@ -68,8 +71,9 @@ class Header extends ImmutablePureComponent {
     onBlock: PropTypes.func.isRequired,
     onMention: PropTypes.func.isRequired,
     onDirect: PropTypes.func.isRequired,
-    onReport: PropTypes.func.isRequired,
     onReblogToggle: PropTypes.func.isRequired,
+    onNotifyToggle: PropTypes.func.isRequired,
+    onReport: PropTypes.func.isRequired,
     onMute: PropTypes.func.isRequired,
     onBlockDomain: PropTypes.func.isRequired,
     onUnblockDomain: PropTypes.func.isRequired,
@@ -134,8 +138,11 @@ class Header extends ImmutablePureComponent {
 
     const accountNote = account.getIn(['relationship', 'note']);
 
+    const suspended = account.get('suspended');
+
     let info        = [];
     let actionBtn   = '';
+    let bellBtn     = '';
     let lockedIcon  = '';
     let menu        = [];
 
@@ -166,21 +173,29 @@ class Header extends ImmutablePureComponent {
       actionBtn = <Button className='logo-button' text={intl.formatMessage(messages.edit_profile)} onClick={this.openEditProfile} />;
     }
 
+    if (account.getIn(['relationship', 'requested']) || account.getIn(['relationship', 'following'])) {
+      bellBtn = <IconButton icon='bell-o' size={24} active={account.getIn(['relationship', 'notifying'])} title={intl.formatMessage(account.getIn(['relationship', 'notifying']) ? messages.disableNotifications : messages.enableNotifications, { name: account.get('username') })} onClick={this.props.onNotifyToggle} />;
+    }
+
     if (account.get('moved') && !account.getIn(['relationship', 'following'])) {
       actionBtn = '';
     }
 
+    if (suspended && !account.getIn(['relationship', 'following'])) {
+      actionBtn = '';
+    }
+
     if (account.get('locked')) {
       lockedIcon = <Icon id='lock' title={intl.formatMessage(messages.account_locked)} />;
     }
 
-    if (account.get('id') !== me) {
+    if (account.get('id') !== me && !suspended) {
       menu.push({ text: intl.formatMessage(messages.mention, { name: account.get('username') }), action: this.props.onMention });
       menu.push({ text: intl.formatMessage(messages.direct, { name: account.get('username') }), action: this.props.onDirect });
       menu.push(null);
     }
 
-    if ('share' in navigator) {
+    if ('share' in navigator && !suspended) {
       menu.push({ text: intl.formatMessage(messages.share, { name: account.get('username') }), action: this.handleShare });
       menu.push(null);
     }
@@ -283,6 +298,7 @@ class Header extends ImmutablePureComponent {
 
             <div className='account__header__tabs__buttons'>
               {actionBtn}
+              {bellBtn}
 
               <DropdownMenuContainer items={menu} icon='ellipsis-v' size={24} direction='right' />
             </div>
@@ -297,39 +313,41 @@ class Header extends ImmutablePureComponent {
 
           <AccountNoteContainer account={account} />
 
-          <div className='account__header__extra'>
-            <div className='account__header__bio'>
-              { (fields.size > 0 || identity_proofs.size > 0) && (
-                <div className='account__header__fields'>
-                  {identity_proofs.map((proof, i) => (
-                    <dl key={i}>
-                      <dt dangerouslySetInnerHTML={{ __html: proof.get('provider') }} />
-
-                      <dd className='verified'>
-                        <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 noreferrer'><span dangerouslySetInnerHTML={{ __html: ' '+proof.get('provider_username') }} /></a>
-                      </dd>
-                    </dl>
-                  ))}
-                  {fields.map((pair, i) => (
-                    <dl key={i}>
-                      <dt dangerouslySetInnerHTML={{ __html: pair.get('name_emojified') }} title={pair.get('name')} />
- 
-                      <dd className={pair.get('verified_at') && 'verified'} title={pair.get('value_plain')}>
-                        {pair.get('verified_at') && <span title={intl.formatMessage(messages.linkVerifiedOn, { date: intl.formatDate(pair.get('verified_at'), dateFormatOptions) })}><Icon id='check' className='verified__mark' /></span>} <span dangerouslySetInnerHTML={{ __html: pair.get('value_emojified') }} />
-                      </dd>
-                    </dl>
-                  ))}
-                </div>
-              )}
-
-              {account.get('note').length > 0 && account.get('note') !== '<p></p>' && <div className='account__header__content' dangerouslySetInnerHTML={content} />}
+          {!suspended && (
+            <div className='account__header__extra'>
+              <div className='account__header__bio'>
+                { (fields.size > 0 || identity_proofs.size > 0) && (
+                  <div className='account__header__fields'>
+                    {identity_proofs.map((proof, i) => (
+                      <dl key={i}>
+                        <dt dangerouslySetInnerHTML={{ __html: proof.get('provider') }} />
+
+                        <dd className='verified'>
+                          <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 noreferrer'><span dangerouslySetInnerHTML={{ __html: ' '+proof.get('provider_username') }} /></a>
+                        </dd>
+                      </dl>
+                    ))}
+                    {fields.map((pair, i) => (
+                      <dl key={i}>
+                        <dt dangerouslySetInnerHTML={{ __html: pair.get('name_emojified') }} title={pair.get('name')} />
+   
+                        <dd className={pair.get('verified_at') && 'verified'} title={pair.get('value_plain')}>
+                          {pair.get('verified_at') && <span title={intl.formatMessage(messages.linkVerifiedOn, { date: intl.formatDate(pair.get('verified_at'), dateFormatOptions) })}><Icon id='check' className='verified__mark' /></span>} <span dangerouslySetInnerHTML={{ __html: pair.get('value_emojified') }} />
+                        </dd>
+                      </dl>
+                    ))}
+                  </div>
+                )}
+
+                {account.get('note').length > 0 && account.get('note') !== '<p></p>' && <div className='account__header__content' dangerouslySetInnerHTML={content} />}
+              </div>
             </div>
-         </div>
-       </div>
-     </div>
+          )}
+        </div>
+      </div>
     );
   }
 
diff --git a/app/javascript/flavours/glitch/features/account_gallery/index.js b/app/javascript/flavours/glitch/features/account_gallery/index.js
index 040741c2a..fda8082cc 100644
--- a/app/javascript/flavours/glitch/features/account_gallery/index.js
+++ b/app/javascript/flavours/glitch/features/account_gallery/index.js
@@ -21,6 +21,7 @@ const mapStateToProps = (state, props) => ({
   attachments: getAccountGallery(state, props.params.accountId),
   isLoading: state.getIn(['timelines', `account:${props.params.accountId}:media`, 'isLoading']),
   hasMore: state.getIn(['timelines', `account:${props.params.accountId}:media`, 'hasMore']),
+  suspended: state.getIn(['accounts', props.params.accountId, 'suspended'], false),
 });
 
 class LoadMoreMedia extends ImmutablePureComponent {
@@ -56,6 +57,7 @@ class AccountGallery extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     isAccount: PropTypes.bool,
     multiColumn: PropTypes.bool,
+    suspended: PropTypes.bool,
   };
 
   state = {
@@ -131,7 +133,7 @@ class AccountGallery extends ImmutablePureComponent {
   }
 
   render () {
-    const { attachments, isLoading, hasMore, isAccount, multiColumn } = this.props;
+    const { attachments, isLoading, hasMore, isAccount, multiColumn, suspended } = this.props;
     const { width } = this.state;
 
     if (!isAccount) {
@@ -164,15 +166,21 @@ class AccountGallery extends ImmutablePureComponent {
           <div className='scrollable scrollable--flex' onScroll={this.handleScroll}>
             <HeaderContainer accountId={this.props.params.accountId} />
 
-            <div role='feed' className='account-gallery__container' ref={this.handleRef}>
-              {attachments.map((attachment, index) => attachment === null ? (
-                <LoadMoreMedia key={'more:' + attachments.getIn(index + 1, 'id')} maxId={index > 0 ? attachments.getIn(index - 1, 'id') : null} onLoadMore={this.handleLoadMore} />
-              ) : (
-                <MediaItem key={attachment.get('id')} attachment={attachment} displayWidth={width} onOpenMedia={this.handleOpenMedia} />
-              ))}
-
-              {loadOlder}
-            </div>
+            {suspended ? (
+              <div className='empty-column-indicator'>
+                <FormattedMessage id='empty_column.account_unavailable' defaultMessage='Profile unavailable' />
+              </div>
+            ) : (
+              <div role='feed' className='account-gallery__container' ref={this.handleRef}>
+                {attachments.map((attachment, index) => attachment === null ? (
+                  <LoadMoreMedia key={'more:' + attachments.getIn(index + 1, 'id')} maxId={index > 0 ? attachments.getIn(index - 1, 'id') : null} onLoadMore={this.handleLoadMore} />
+                ) : (
+                  <MediaItem key={attachment.get('id')} attachment={attachment} displayWidth={width} onOpenMedia={this.handleOpenMedia} />
+                ))}
+
+                {loadOlder}
+              </div>
+            )}
 
             {isLoading && attachments.size === 0 && (
               <div className='scrollable__append'>
diff --git a/app/javascript/flavours/glitch/features/account_timeline/components/header.js b/app/javascript/flavours/glitch/features/account_timeline/components/header.js
index 8195735a1..a6b57d331 100644
--- a/app/javascript/flavours/glitch/features/account_timeline/components/header.js
+++ b/app/javascript/flavours/glitch/features/account_timeline/components/header.js
@@ -56,6 +56,10 @@ export default class Header extends ImmutablePureComponent {
     this.props.onReblogToggle(this.props.account);
   }
 
+  handleNotifyToggle = () => {
+    this.props.onNotifyToggle(this.props.account);
+  }
+
   handleMute = () => {
     this.props.onMute(this.props.account);
   }
@@ -107,6 +111,7 @@ export default class Header extends ImmutablePureComponent {
           onMention={this.handleMention}
           onDirect={this.handleDirect}
           onReblogToggle={this.handleReblogToggle}
+          onNotifyToggle={this.handleNotifyToggle}
           onReport={this.handleReport}
           onMute={this.handleMute}
           onBlockDomain={this.handleBlockDomain}
diff --git a/app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js b/app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js
index 225910292..90e746679 100644
--- a/app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js
+++ b/app/javascript/flavours/glitch/features/account_timeline/containers/header_container.js
@@ -81,9 +81,9 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
 
   onReblogToggle (account) {
     if (account.getIn(['relationship', 'showing_reblogs'])) {
-      dispatch(followAccount(account.get('id'), false));
+      dispatch(followAccount(account.get('id'), { reblogs: false }));
     } else {
-      dispatch(followAccount(account.get('id'), true));
+      dispatch(followAccount(account.get('id'), { reblogs: true }));
     }
   },
 
@@ -95,6 +95,14 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     }
   },
 
+  onNotifyToggle (account) {
+    if (account.getIn(['relationship', 'notifying'])) {
+      dispatch(followAccount(account.get('id'), { notify: false }));
+    } else {
+      dispatch(followAccount(account.get('id'), { notify: true }));
+    }
+  },
+
   onReport (account) {
     dispatch(initReport(account));
   },
diff --git a/app/javascript/flavours/glitch/features/account_timeline/index.js b/app/javascript/flavours/glitch/features/account_timeline/index.js
index 5558ba2a3..c56cc9b8e 100644
--- a/app/javascript/flavours/glitch/features/account_timeline/index.js
+++ b/app/javascript/flavours/glitch/features/account_timeline/index.js
@@ -17,6 +17,8 @@ import { fetchAccountIdentityProofs } from '../../actions/identity_proofs';
 import MissingIndicator from 'flavours/glitch/components/missing_indicator';
 import TimelineHint from 'flavours/glitch/components/timeline_hint';
 
+const emptyList = ImmutableList();
+
 const mapStateToProps = (state, { params: { accountId }, withReplies = false }) => {
   const path = withReplies ? `${accountId}:with_replies` : accountId;
 
@@ -28,6 +30,7 @@ const mapStateToProps = (state, { params: { accountId }, withReplies = false })
     featuredStatusIds: withReplies ? ImmutableList() : state.getIn(['timelines', `account:${accountId}:pinned`, 'items'], ImmutableList()),
     isLoading: state.getIn(['timelines', `account:${path}`, 'isLoading']),
     hasMore:   state.getIn(['timelines', `account:${path}`, 'hasMore']),
+    suspended: state.getIn(['accounts', accountId, 'suspended'], false),
   };
 };
 
@@ -51,6 +54,7 @@ class AccountTimeline extends ImmutablePureComponent {
     hasMore: PropTypes.bool,
     withReplies: PropTypes.bool,
     isAccount: PropTypes.bool,
+    suspended: PropTypes.bool,
     remote: PropTypes.bool,
     remoteUrl: PropTypes.string,
     multiColumn: PropTypes.bool,
@@ -91,7 +95,7 @@ class AccountTimeline extends ImmutablePureComponent {
   }
 
   render () {
-    const { statusIds, featuredStatusIds, isLoading, hasMore, isAccount, multiColumn, remote, remoteUrl } = this.props;
+    const { statusIds, featuredStatusIds, isLoading, hasMore, suspended, isAccount, multiColumn, remote, remoteUrl } = this.props;
 
     if (!isAccount) {
       return (
@@ -112,7 +116,9 @@ class AccountTimeline extends ImmutablePureComponent {
 
     let emptyMessage;
 
-    if (remote && statusIds.isEmpty()) {
+    if (suspended) {
+      emptyMessage = <FormattedMessage id='empty_column.account_unavailable' defaultMessage='Profile unavailable' />;
+    } else if (remote && statusIds.isEmpty()) {
       emptyMessage = <RemoteHint url={remoteUrl} />;
     } else {
       emptyMessage = <FormattedMessage id='empty_column.account_timeline' defaultMessage='No toots here!' />;
@@ -129,7 +135,7 @@ class AccountTimeline extends ImmutablePureComponent {
           alwaysPrepend
           append={remoteMessage}
           scrollKey='account_timeline'
-          statusIds={statusIds}
+          statusIds={suspended ? emptyList : statusIds}
           featuredStatusIds={featuredStatusIds}
           isLoading={isLoading}
           hasMore={hasMore}
diff --git a/app/javascript/flavours/glitch/features/notifications/components/filter_bar.js b/app/javascript/flavours/glitch/features/notifications/components/filter_bar.js
index 6118305d6..c1de0f90e 100644
--- a/app/javascript/flavours/glitch/features/notifications/components/filter_bar.js
+++ b/app/javascript/flavours/glitch/features/notifications/components/filter_bar.js
@@ -9,6 +9,7 @@ const tooltips = defineMessages({
   boosts: { id: 'notifications.filter.boosts', defaultMessage: 'Boosts' },
   polls: { id: 'notifications.filter.polls', defaultMessage: 'Poll results' },
   follows: { id: 'notifications.filter.follows', defaultMessage: 'Follows' },
+  statuses: { id: 'notifications.filter.statuses', defaultMessage: 'Updates from people you follow' },
 });
 
 export default @injectIntl
@@ -88,6 +89,13 @@ class FilterBar extends React.PureComponent {
           <Icon id='tasks' fixedWidth />
         </button>
         <button
+          className={selectedFilter === 'status' ? 'active' : ''}
+          onClick={this.onClick('status')}
+          title={intl.formatMessage(tooltips.statuses)}
+        >
+          <Icon id='home' fixedWidth />
+        </button>
+        <button
           className={selectedFilter === 'follow' ? 'active' : ''}
           onClick={this.onClick('follow')}
           title={intl.formatMessage(tooltips.follows)}
diff --git a/app/javascript/flavours/glitch/features/notifications/components/notification.js b/app/javascript/flavours/glitch/features/notifications/components/notification.js
index bd415856c..e1d9fbd0a 100644
--- a/app/javascript/flavours/glitch/features/notifications/components/notification.js
+++ b/app/javascript/flavours/glitch/features/notifications/components/notification.js
@@ -83,6 +83,28 @@ export default class Notification extends ImmutablePureComponent {
           unread={this.props.unread}
         />
       );
+    case 'status':
+      return (
+        <StatusContainer
+          containerId={notification.get('id')}
+          hidden={hidden}
+          id={notification.get('status')}
+          account={notification.get('account')}
+          prepend='status'
+          muted
+          notification={notification}
+          onMoveDown={onMoveDown}
+          onMoveUp={onMoveUp}
+          onMention={onMention}
+          getScrollPosition={getScrollPosition}
+          updateScrollBottom={updateScrollBottom}
+          cachedMediaWidth={this.props.cachedMediaWidth}
+          cacheMediaWidth={this.props.cacheMediaWidth}
+          onUnmount={this.props.onUnmount}
+          withDismiss
+          unread={this.props.unread}
+        />
+      );
     case 'favourite':
       return (
         <StatusContainer
diff --git a/app/javascript/flavours/glitch/features/notifications/index.js b/app/javascript/flavours/glitch/features/notifications/index.js
index 681323860..475968caa 100644
--- a/app/javascript/flavours/glitch/features/notifications/index.js
+++ b/app/javascript/flavours/glitch/features/notifications/index.js
@@ -48,7 +48,7 @@ const getNotifications = createSelector([
     // we need to turn it off for FilterBar in order not to block ourselves from seeing a specific category
     return notifications.filterNot(item => item !== null && excludedTypes.includes(item.get('type')));
   }
-  return notifications.filter(item => item !== null && allowedType === item.get('type'));
+  return notifications.filter(item => item === null || allowedType === item.get('type'));
 });
 
 const mapStateToProps = state => ({
diff --git a/app/javascript/flavours/glitch/features/ui/index.js b/app/javascript/flavours/glitch/features/ui/index.js
index a8fc1ad84..a399fc2b3 100644
--- a/app/javascript/flavours/glitch/features/ui/index.js
+++ b/app/javascript/flavours/glitch/features/ui/index.js
@@ -364,21 +364,6 @@ class UI extends React.Component {
   }
 
   componentWillMount () {
-    if (typeof document.hidden !== 'undefined') { // Opera 12.10 and Firefox 18 and later support
-      this.visibilityHiddenProp = 'hidden';
-      this.visibilityChange = 'visibilitychange';
-    } else if (typeof document.msHidden !== 'undefined') {
-      this.visibilityHiddenProp = 'msHidden';
-      this.visibilityChange = 'msvisibilitychange';
-    } else if (typeof document.webkitHidden !== 'undefined') {
-      this.visibilityHiddenProp = 'webkitHidden';
-      this.visibilityChange = 'webkitvisibilitychange';
-    }
-    if (this.visibilityChange !== undefined) {
-      document.addEventListener(this.visibilityChange, this.handleVisibilityChange, false);
-      this.handleVisibilityChange();
-    }
-
     window.addEventListener('beforeunload', this.handleBeforeUnload, false);
     document.addEventListener('dragenter', this.handleDragEnter, false);
     document.addEventListener('dragover', this.handleDragOver, false);
@@ -402,6 +387,22 @@ class UI extends React.Component {
     this.hotkeys.__mousetrap__.stopCallback = (e, element) => {
       return ['TEXTAREA', 'SELECT', 'INPUT'].includes(element.tagName) && !e.altKey;
     };
+
+    if (typeof document.hidden !== 'undefined') { // Opera 12.10 and Firefox 18 and later support
+      this.visibilityHiddenProp = 'hidden';
+      this.visibilityChange = 'visibilitychange';
+    } else if (typeof document.msHidden !== 'undefined') {
+      this.visibilityHiddenProp = 'msHidden';
+      this.visibilityChange = 'msvisibilitychange';
+    } else if (typeof document.webkitHidden !== 'undefined') {
+      this.visibilityHiddenProp = 'webkitHidden';
+      this.visibilityChange = 'webkitvisibilitychange';
+    }
+
+    if (this.visibilityChange !== undefined) {
+      document.addEventListener(this.visibilityChange, this.handleVisibilityChange, false);
+      this.handleVisibilityChange();
+    }
   }
 
   componentDidUpdate (prevProps) {
diff --git a/app/javascript/flavours/glitch/reducers/relationships.js b/app/javascript/flavours/glitch/reducers/relationships.js
index dcaeefcae..33eb5b425 100644
--- a/app/javascript/flavours/glitch/reducers/relationships.js
+++ b/app/javascript/flavours/glitch/reducers/relationships.js
@@ -1,6 +1,10 @@
 import {
   ACCOUNT_FOLLOW_SUCCESS,
+  ACCOUNT_FOLLOW_REQUEST,
+  ACCOUNT_FOLLOW_FAIL,
   ACCOUNT_UNFOLLOW_SUCCESS,
+  ACCOUNT_UNFOLLOW_REQUEST,
+  ACCOUNT_UNFOLLOW_FAIL,
   ACCOUNT_BLOCK_SUCCESS,
   ACCOUNT_UNBLOCK_SUCCESS,
   ACCOUNT_MUTE_SUCCESS,
@@ -40,6 +44,14 @@ const initialState = ImmutableMap();
 
 export default function relationships(state = initialState, action) {
   switch(action.type) {
+  case ACCOUNT_FOLLOW_REQUEST:
+    return state.setIn([action.id, action.locked ? 'requested' : 'following'], true);
+  case ACCOUNT_FOLLOW_FAIL:
+    return state.setIn([action.id, action.locked ? 'requested' : 'following'], false);
+  case ACCOUNT_UNFOLLOW_REQUEST:
+    return state.setIn([action.id, 'following'], false);
+  case ACCOUNT_UNFOLLOW_FAIL:
+    return state.setIn([action.id, 'following'], true);
   case ACCOUNT_FOLLOW_SUCCESS:
   case ACCOUNT_UNFOLLOW_SUCCESS:
   case ACCOUNT_BLOCK_SUCCESS:
diff --git a/app/javascript/flavours/glitch/styles/components/accounts.scss b/app/javascript/flavours/glitch/styles/components/accounts.scss
index 0fc2a11ff..145219fa7 100644
--- a/app/javascript/flavours/glitch/styles/components/accounts.scss
+++ b/app/javascript/flavours/glitch/styles/components/accounts.scss
@@ -620,6 +620,10 @@
         padding: 2px;
       }
 
+      & > .icon-button {
+        margin-right: 8px;
+      }
+
       .button {
         margin: 0 8px;
       }
diff --git a/app/javascript/flavours/glitch/styles/contrast/diff.scss b/app/javascript/flavours/glitch/styles/contrast/diff.scss
index f78e60597..0f3a6cc6d 100644
--- a/app/javascript/flavours/glitch/styles/contrast/diff.scss
+++ b/app/javascript/flavours/glitch/styles/contrast/diff.scss
@@ -75,3 +75,12 @@
 .public-layout .public-account-header__tabs__tabs .counter.active::after {
   border-bottom: 4px solid $ui-highlight-color;
 }
+
+.composer {
+  .composer--spoiler input,
+  .compose-form__autosuggest-wrapper textarea {
+    &::placeholder {
+      color: $inverted-text-color;
+    }
+  }
+}
diff --git a/app/javascript/flavours/glitch/util/emoji/index.js b/app/javascript/flavours/glitch/util/emoji/index.js
index a59e17ddb..233ec25e3 100644
--- a/app/javascript/flavours/glitch/util/emoji/index.js
+++ b/app/javascript/flavours/glitch/util/emoji/index.js
@@ -12,7 +12,7 @@ const emojiFilenames = (emojis) => {
 };
 
 // Emoji requiring extra borders depending on theme
-const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞']);
+const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞', '🕺']);
 const lightEmoji = emojiFilenames(['👽', '⚾', '🐔', '☁️', '💨', '🕊️', '👀', '🍥', '👻', '🐐', '❕', '❔', '⛸️', '🌩️', '🔊', '🔇', '📃', '🌧️', '🐏', '🍚', '🍙', '🐓', '🐑', '💀', '☠️', '🌨️', '🔉', '🔈', '💬', '💭', '🏐', '🏳️', '⚪', '⬜', '◽', '◻️', '▫️']);
 
 const emojiFilename = (filename) => {
diff --git a/app/javascript/mastodon/actions/accounts.js b/app/javascript/mastodon/actions/accounts.js
index d28f7dad8..723c04e55 100644
--- a/app/javascript/mastodon/actions/accounts.js
+++ b/app/javascript/mastodon/actions/accounts.js
@@ -109,14 +109,14 @@ export function fetchAccountFail(id, error) {
   };
 };
 
-export function followAccount(id, reblogs = true) {
+export function followAccount(id, options = { reblogs: true }) {
   return (dispatch, getState) => {
     const alreadyFollowing = getState().getIn(['relationships', id, 'following']);
     const locked = getState().getIn(['accounts', id, 'locked'], false);
 
     dispatch(followAccountRequest(id, locked));
 
-    api(getState).post(`/api/v1/accounts/${id}/follow`, { reblogs }).then(response => {
+    api(getState).post(`/api/v1/accounts/${id}/follow`, options).then(response => {
       dispatch(followAccountSuccess(response.data, alreadyFollowing));
     }).catch(error => {
       dispatch(followAccountFail(error, locked));
diff --git a/app/javascript/mastodon/actions/markers.js b/app/javascript/mastodon/actions/markers.js
index 37d1ddccf..41a95503e 100644
--- a/app/javascript/mastodon/actions/markers.js
+++ b/app/javascript/mastodon/actions/markers.js
@@ -3,6 +3,9 @@ import { debounce } from 'lodash';
 import compareId from '../compare_id';
 import { showAlertForError } from './alerts';
 
+export const MARKERS_FETCH_REQUEST = 'MARKERS_FETCH_REQUEST';
+export const MARKERS_FETCH_SUCCESS = 'MARKERS_FETCH_SUCCESS';
+export const MARKERS_FETCH_FAIL    = 'MARKERS_FETCH_FAIL';
 export const MARKERS_SUBMIT_SUCCESS = 'MARKERS_SUBMIT_SUCCESS';
 
 export const synchronouslySubmitMarkers = () => (dispatch, getState) => {
@@ -57,8 +60,8 @@ export const synchronouslySubmitMarkers = () => (dispatch, getState) => {
 const _buildParams = (state) => {
   const params = {};
 
-  const lastHomeId         = state.getIn(['timelines', 'home', 'items', 0]);
-  const lastNotificationId = state.getIn(['notifications', 'items', 0, 'id']);
+  const lastHomeId         = state.getIn(['timelines', 'home', 'items']).find(item => item !== null);
+  const lastNotificationId = state.getIn(['notifications', 'lastReadId']);
 
   if (lastHomeId && compareId(lastHomeId, state.getIn(['markers', 'home'])) > 0) {
     params.home = {
@@ -100,3 +103,39 @@ export function submitMarkersSuccess({ home, notifications }) {
 export function submitMarkers() {
   return (dispatch, getState) => debouncedSubmitMarkers(dispatch, getState);
 };
+
+export const fetchMarkers = () => (dispatch, getState) => {
+  const params = { timeline: ['notifications'] };
+
+  dispatch(fetchMarkersRequest());
+
+  api(getState).get('/api/v1/markers', { params }).then(response => {
+    dispatch(fetchMarkersSuccess(response.data));
+  }).catch(error => {
+    dispatch(fetchMarkersFail(error));
+  });
+};
+
+export function fetchMarkersRequest() {
+  return {
+    type: MARKERS_FETCH_REQUEST,
+    skipLoading: true,
+  };
+};
+
+export function fetchMarkersSuccess(markers) {
+  return {
+    type: MARKERS_FETCH_SUCCESS,
+    markers,
+    skipLoading: true,
+  };
+};
+
+export function fetchMarkersFail(error) {
+  return {
+    type: MARKERS_FETCH_FAIL,
+    error,
+    skipLoading: true,
+    skipAlert: true,
+  };
+};
diff --git a/app/javascript/mastodon/actions/notifications.js b/app/javascript/mastodon/actions/notifications.js
index a26844f84..552def63b 100644
--- a/app/javascript/mastodon/actions/notifications.js
+++ b/app/javascript/mastodon/actions/notifications.js
@@ -33,6 +33,8 @@ export const NOTIFICATIONS_LOAD_PENDING = 'NOTIFICATIONS_LOAD_PENDING';
 export const NOTIFICATIONS_MOUNT   = 'NOTIFICATIONS_MOUNT';
 export const NOTIFICATIONS_UNMOUNT = 'NOTIFICATIONS_UNMOUNT';
 
+export const NOTIFICATIONS_MARK_AS_READ = 'NOTIFICATIONS_MARK_AS_READ';
+
 defineMessages({
   mention: { id: 'notification.mention', defaultMessage: '{name} mentioned you' },
   group: { id: 'notifications.group', defaultMessage: '{count} notifications' },
@@ -59,7 +61,7 @@ export function updateNotifications(notification, intlMessages, intlLocale) {
 
     let filtered = false;
 
-    if (notification.type === 'mention') {
+    if (['mention', 'status'].includes(notification.type)) {
       const dropRegex   = filters[0];
       const regex       = filters[1];
       const searchIndex = searchTextFromRawStatus(notification.status);
diff --git a/app/javascript/mastodon/actions/picture_in_picture.js b/app/javascript/mastodon/actions/picture_in_picture.js
new file mode 100644
index 000000000..4085cb59e
--- /dev/null
+++ b/app/javascript/mastodon/actions/picture_in_picture.js
@@ -0,0 +1,38 @@
+// @ts-check
+
+export const PICTURE_IN_PICTURE_DEPLOY = 'PICTURE_IN_PICTURE_DEPLOY';
+export const PICTURE_IN_PICTURE_REMOVE = 'PICTURE_IN_PICTURE_REMOVE';
+
+/**
+ * @typedef MediaProps
+ * @property {string} src
+ * @property {boolean} muted
+ * @property {number} volume
+ * @property {number} currentTime
+ * @property {string} poster
+ * @property {string} backgroundColor
+ * @property {string} foregroundColor
+ * @property {string} accentColor
+ */
+
+/**
+ * @param {string} statusId
+ * @param {string} accountId
+ * @param {string} playerType
+ * @param {MediaProps} props
+ * @return {object}
+ */
+export const deployPictureInPicture = (statusId, accountId, playerType, props) => ({
+  type: PICTURE_IN_PICTURE_DEPLOY,
+  statusId,
+  accountId,
+  playerType,
+  props,
+});
+
+/*
+ * @return {object}
+ */
+export const removePictureInPicture = () => ({
+  type: PICTURE_IN_PICTURE_REMOVE,
+});
diff --git a/app/javascript/mastodon/components/animated_number.js b/app/javascript/mastodon/components/animated_number.js
index f3127c88e..fbe948c5b 100644
--- a/app/javascript/mastodon/components/animated_number.js
+++ b/app/javascript/mastodon/components/animated_number.js
@@ -5,10 +5,21 @@ import TransitionMotion from 'react-motion/lib/TransitionMotion';
 import spring from 'react-motion/lib/spring';
 import { reduceMotion } from 'mastodon/initial_state';
 
+const obfuscatedCount = count => {
+  if (count < 0) {
+    return 0;
+  } else if (count <= 1) {
+    return count;
+  } else {
+    return '1+';
+  }
+};
+
 export default class AnimatedNumber extends React.PureComponent {
 
   static propTypes = {
     value: PropTypes.number.isRequired,
+    obfuscate: PropTypes.bool,
   };
 
   state = {
@@ -36,11 +47,11 @@ export default class AnimatedNumber extends React.PureComponent {
   }
 
   render () {
-    const { value } = this.props;
+    const { value, obfuscate } = this.props;
     const { direction } = this.state;
 
     if (reduceMotion) {
-      return <FormattedNumber value={value} />;
+      return obfuscate ? obfuscatedCount(value) : <FormattedNumber value={value} />;
     }
 
     const styles = [{
@@ -54,7 +65,7 @@ export default class AnimatedNumber extends React.PureComponent {
         {items => (
           <span className='animated-number'>
             {items.map(({ key, data, style }) => (
-              <span key={key} style={{ position: (direction * style.y) > 0 ? 'absolute' : 'static', transform: `translateY(${style.y * 100}%)` }}><FormattedNumber value={data} /></span>
+              <span key={key} style={{ position: (direction * style.y) > 0 ? 'absolute' : 'static', transform: `translateY(${style.y * 100}%)` }}>{obfuscate ? obfuscatedCount(data) : <FormattedNumber value={data} />}</span>
             ))}
           </span>
         )}
diff --git a/app/javascript/mastodon/components/error_boundary.js b/app/javascript/mastodon/components/error_boundary.js
index ca3012276..ca4a2cfe1 100644
--- a/app/javascript/mastodon/components/error_boundary.js
+++ b/app/javascript/mastodon/components/error_boundary.js
@@ -66,17 +66,31 @@ export default class ErrorBoundary extends React.PureComponent {
   }
 
   render() {
-    const { hasError, copied } = this.state;
+    const { hasError, copied, errorMessage } = this.state;
 
     if (!hasError) {
       return this.props.children;
     }
 
+    const likelyBrowserAddonIssue = errorMessage && errorMessage.includes('NotFoundError');
+
     return (
       <div className='error-boundary'>
         <div>
-          <p className='error-boundary__error'><FormattedMessage id='error.unexpected_crash.explanation' defaultMessage='Due to a bug in our code or a browser compatibility issue, this page could not be displayed correctly.' /></p>
-          <p><FormattedMessage id='error.unexpected_crash.next_steps' defaultMessage='Try refreshing the page. If that does not help, you may still be able to use Mastodon through a different browser or native app.' /></p>
+          <p className='error-boundary__error'>
+            { likelyBrowserAddonIssue ? (
+              <FormattedMessage id='error.unexpected_crash.explanation_addons' defaultMessage='This page could not be displayed correctly. This error is likely caused by a browser add-on or automatic translation tools.' />
+            ) : (
+              <FormattedMessage id='error.unexpected_crash.explanation' defaultMessage='Due to a bug in our code or a browser compatibility issue, this page could not be displayed correctly.' />
+            )}
+          </p>
+          <p>
+            { likelyBrowserAddonIssue ? (
+              <FormattedMessage id='error.unexpected_crash.next_steps_addons' defaultMessage='Try disabling them and refreshing the page. If that does not help, you may still be able to use Mastodon through a different browser or native app.' />
+            ) : (
+              <FormattedMessage id='error.unexpected_crash.next_steps' defaultMessage='Try refreshing the page. If that does not help, you may still be able to use Mastodon through a different browser or native app.' />
+            )}
+          </p>
           <p className='error-boundary__footer'>Mastodon v{version} · <a href={source_url} rel='noopener noreferrer' target='_blank'><FormattedMessage id='errors.unexpected_crash.report_issue' defaultMessage='Report issue' /></a> · <button onClick={this.handleCopyStackTrace} className={copied ? 'copied' : ''}><FormattedMessage id='errors.unexpected_crash.copy_stacktrace' defaultMessage='Copy stacktrace to clipboard' /></button></p>
         </div>
       </div>
diff --git a/app/javascript/mastodon/components/icon_button.js b/app/javascript/mastodon/components/icon_button.js
index fd715bc3c..7f83dc1b9 100644
--- a/app/javascript/mastodon/components/icon_button.js
+++ b/app/javascript/mastodon/components/icon_button.js
@@ -2,6 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import Icon from 'mastodon/components/icon';
+import AnimatedNumber from 'mastodon/components/animated_number';
 
 export default class IconButton extends React.PureComponent {
 
@@ -24,6 +25,8 @@ export default class IconButton extends React.PureComponent {
     animate: PropTypes.bool,
     overlay: PropTypes.bool,
     tabIndex: PropTypes.string,
+    counter: PropTypes.number,
+    obfuscateCount: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -97,6 +100,8 @@ export default class IconButton extends React.PureComponent {
       pressed,
       tabIndex,
       title,
+      counter,
+      obfuscateCount,
     } = this.props;
 
     const {
@@ -113,6 +118,10 @@ export default class IconButton extends React.PureComponent {
       overlayed: overlay,
     });
 
+    if (typeof counter !== 'undefined') {
+      style.width = 'auto';
+    }
+
     return (
       <button
         aria-label={title}
@@ -128,7 +137,7 @@ export default class IconButton extends React.PureComponent {
         tabIndex={tabIndex}
         disabled={disabled}
       >
-        <Icon id={icon} fixedWidth aria-hidden='true' />
+        <Icon id={icon} fixedWidth aria-hidden='true' /> {typeof counter !== 'undefined' && <span className='icon-button__counter'><AnimatedNumber value={counter} obfuscate={obfuscateCount} /></span>}
       </button>
     );
   }
diff --git a/app/javascript/mastodon/components/intersection_observer_article.js b/app/javascript/mastodon/components/intersection_observer_article.js
index 124b34b02..2d87f19b5 100644
--- a/app/javascript/mastodon/components/intersection_observer_article.js
+++ b/app/javascript/mastodon/components/intersection_observer_article.js
@@ -2,10 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import scheduleIdleTask from '../features/ui/util/schedule_idle_task';
 import getRectFromEntry from '../features/ui/util/get_rect_from_entry';
-import { is } from 'immutable';
 
-// Diff these props in the "rendered" state
-const updateOnPropsForRendered = ['id', 'index', 'listLength'];
 // Diff these props in the "unrendered" state
 const updateOnPropsForUnrendered = ['id', 'index', 'listLength', 'cachedHeight'];
 
@@ -33,9 +30,12 @@ export default class IntersectionObserverArticle extends React.Component {
       // If we're going from rendered to unrendered (or vice versa) then update
       return true;
     }
-    // Otherwise, diff based on props
-    const propsToDiff = isUnrendered ? updateOnPropsForUnrendered : updateOnPropsForRendered;
-    return !propsToDiff.every(prop => is(nextProps[prop], this.props[prop]));
+    // If we are and remain hidden, diff based on props
+    if (isUnrendered) {
+      return !updateOnPropsForUnrendered.every(prop => nextProps[prop] === this.props[prop]);
+    }
+    // Else, assume the children have changed
+    return true;
   }
 
   componentDidMount () {
diff --git a/app/javascript/mastodon/components/picture_in_picture_placeholder.js b/app/javascript/mastodon/components/picture_in_picture_placeholder.js
new file mode 100644
index 000000000..19d15c18b
--- /dev/null
+++ b/app/javascript/mastodon/components/picture_in_picture_placeholder.js
@@ -0,0 +1,69 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import Icon from 'mastodon/components/icon';
+import { removePictureInPicture } from 'mastodon/actions/picture_in_picture';
+import { connect } from 'react-redux';
+import { debounce } from 'lodash';
+import { FormattedMessage } from 'react-intl';
+
+export default @connect()
+class PictureInPicturePlaceholder extends React.PureComponent {
+
+  static propTypes = {
+    width: PropTypes.number,
+    dispatch: PropTypes.func.isRequired,
+  };
+
+  state = {
+    width: this.props.width,
+    height: this.props.width && (this.props.width / (16/9)),
+  };
+
+  handleClick = () => {
+    const { dispatch } = this.props;
+    dispatch(removePictureInPicture());
+  }
+
+  setRef = c => {
+    this.node = c;
+
+    if (this.node) {
+      this._setDimensions();
+    }
+  }
+
+  _setDimensions () {
+    const width  = this.node.offsetWidth;
+    const height = width / (16/9);
+
+    this.setState({ width, height });
+  }
+
+  componentDidMount () {
+    window.addEventListener('resize', this.handleResize, { passive: true });
+  }
+
+  componentWillUnmount () {
+    window.removeEventListener('resize', this.handleResize);
+  }
+
+  handleResize = debounce(() => {
+    if (this.node) {
+      this._setDimensions();
+    }
+  }, 250, {
+    trailing: true,
+  });
+
+  render () {
+    const { height } = this.state;
+
+    return (
+      <div ref={this.setRef} className='picture-in-picture-placeholder' style={{ height }} role='button' tabIndex='0' onClick={this.handleClick}>
+        <Icon id='window-restore' />
+        <FormattedMessage id='picture_in_picture.restore' defaultMessage='Put it back' />
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/components/status.js b/app/javascript/mastodon/components/status.js
index 174e401b7..c1e1cd172 100644
--- a/app/javascript/mastodon/components/status.js
+++ b/app/javascript/mastodon/components/status.js
@@ -17,6 +17,7 @@ import { HotKeys } from 'react-hotkeys';
 import classNames from 'classnames';
 import Icon from 'mastodon/components/icon';
 import { displayMedia } from '../initial_state';
+import PictureInPicturePlaceholder from 'mastodon/components/picture_in_picture_placeholder';
 
 // We use the component (and not the container) since we do not want
 // to use the progress bar to show download progress
@@ -95,6 +96,8 @@ class Status extends ImmutablePureComponent {
     cacheMediaWidth: PropTypes.func,
     cachedMediaWidth: PropTypes.number,
     scrollKey: PropTypes.string,
+    deployPictureInPicture: PropTypes.func,
+    usingPiP: PropTypes.bool,
   };
 
   // Avoid checking props that are functions (and whose equality will always
@@ -104,6 +107,8 @@ class Status extends ImmutablePureComponent {
     'account',
     'muted',
     'hidden',
+    'unread',
+    'usingPiP',
   ];
 
   state = {
@@ -205,6 +210,13 @@ class Status extends ImmutablePureComponent {
     }
   }
 
+  handleDeployPictureInPicture = (type, mediaProps) => {
+    const { deployPictureInPicture } = this.props;
+    const status = this._properStatus();
+
+    deployPictureInPicture(status, type, mediaProps);
+  }
+
   handleHotkeyReply = e => {
     e.preventDefault();
     this.props.onReply(this._properStatus(), this.context.router.history);
@@ -265,7 +277,7 @@ class Status extends ImmutablePureComponent {
     let media = null;
     let statusAvatar, prepend, rebloggedByText;
 
-    const { intl, hidden, featured, otherAccounts, unread, showThread, scrollKey } = this.props;
+    const { intl, hidden, featured, otherAccounts, unread, showThread, scrollKey, usingPiP } = this.props;
 
     let { status, account, ...other } = this.props;
 
@@ -336,7 +348,9 @@ class Status extends ImmutablePureComponent {
       status  = status.get('reblog');
     }
 
-    if (status.get('media_attachments').size > 0) {
+    if (usingPiP) {
+      media = <PictureInPicturePlaceholder width={this.props.cachedMediaWidth} />;
+    } else if (status.get('media_attachments').size > 0) {
       if (this.props.muted) {
         media = (
           <AttachmentList
@@ -361,6 +375,7 @@ class Status extends ImmutablePureComponent {
                 width={this.props.cachedMediaWidth}
                 height={110}
                 cacheWidth={this.props.cacheMediaWidth}
+                deployPictureInPicture={this.handleDeployPictureInPicture}
               />
             )}
           </Bundle>
@@ -382,6 +397,7 @@ class Status extends ImmutablePureComponent {
                 sensitive={status.get('sensitive')}
                 onOpenVideo={this.handleOpenVideo}
                 cacheWidth={this.props.cacheMediaWidth}
+                deployPictureInPicture={this.handleDeployPictureInPicture}
                 visible={this.state.showMedia}
                 onToggleVisibility={this.handleToggleMediaVisibility}
               />
@@ -438,10 +454,10 @@ class Status extends ImmutablePureComponent {
 
     return (
       <HotKeys handlers={handlers}>
-        <div className={classNames('status__wrapper', `status__wrapper-${status.get('visibility')}`, { 'status__wrapper-reply': !!status.get('in_reply_to_id'), read: unread === false, focusable: !this.props.muted })} tabIndex={this.props.muted ? null : 0} data-featured={featured ? 'true' : null} aria-label={textForScreenReader(intl, status, rebloggedByText)} ref={this.handleRef}>
+        <div className={classNames('status__wrapper', `status__wrapper-${status.get('visibility')}`, { 'status__wrapper-reply': !!status.get('in_reply_to_id'), unread, focusable: !this.props.muted })} tabIndex={this.props.muted ? null : 0} data-featured={featured ? 'true' : null} aria-label={textForScreenReader(intl, status, rebloggedByText)} ref={this.handleRef}>
           {prepend}
 
-          <div className={classNames('status', `status-${status.get('visibility')}`, { 'status-reply': !!status.get('in_reply_to_id'), muted: this.props.muted, read: unread === false })} data-id={status.get('id')}>
+          <div className={classNames('status', `status-${status.get('visibility')}`, { 'status-reply': !!status.get('in_reply_to_id'), muted: this.props.muted })} data-id={status.get('id')}>
             <div className='status__expand' onClick={this.handleExpandClick} role='presentation' />
             <div className='status__info'>
               <a href={status.get('url')} className='status__relative-time' target='_blank' rel='noopener noreferrer'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
diff --git a/app/javascript/mastodon/components/status_action_bar.js b/app/javascript/mastodon/components/status_action_bar.js
index b7babd4ad..66b5a17ac 100644
--- a/app/javascript/mastodon/components/status_action_bar.js
+++ b/app/javascript/mastodon/components/status_action_bar.js
@@ -43,16 +43,6 @@ const messages = defineMessages({
   unblock: { id: 'account.unblock', defaultMessage: 'Unblock @{name}' },
 });
 
-const obfuscatedCount = count => {
-  if (count < 0) {
-    return 0;
-  } else if (count <= 1) {
-    return count;
-  } else {
-    return '1+';
-  }
-};
-
 const mapStateToProps = (state, { status }) => ({
   relationship: state.getIn(['relationships', status.getIn(['account', 'id'])]),
 });
@@ -329,9 +319,10 @@ class StatusActionBar extends ImmutablePureComponent {
 
     return (
       <div className='status__action-bar'>
-        <div className='status__action-bar__counter'><IconButton className='status__action-bar-button' title={replyTitle} icon={status.get('in_reply_to_account_id') === status.getIn(['account', 'id']) ? 'reply' : replyIcon} onClick={this.handleReplyClick} /><span className='status__action-bar__counter__label' >{obfuscatedCount(status.get('replies_count'))}</span></div>
+        <IconButton className='status__action-bar-button' title={replyTitle} icon={status.get('in_reply_to_account_id') === status.getIn(['account', 'id']) ? 'reply' : replyIcon} onClick={this.handleReplyClick} counter={status.get('replies_count')} obfuscateCount />
         <IconButton className={classNames('status__action-bar-button', { reblogPrivate })} disabled={!publicStatus && !reblogPrivate}  active={status.get('reblogged')} pressed={status.get('reblogged')} title={reblogTitle} icon='retweet' onClick={this.handleReblogClick} />
         <IconButton className='status__action-bar-button star-icon' animate active={status.get('favourited')} pressed={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
+
         {shareButton}
 
         <div className='status__action-bar-dropdown'>
diff --git a/app/javascript/mastodon/containers/status_container.js b/app/javascript/mastodon/containers/status_container.js
index decf7279f..7bfd66d3e 100644
--- a/app/javascript/mastodon/containers/status_container.js
+++ b/app/javascript/mastodon/containers/status_container.js
@@ -37,6 +37,7 @@ import { initMuteModal } from '../actions/mutes';
 import { initBlockModal } from '../actions/blocks';
 import { initReport } from '../actions/reports';
 import { openModal } from '../actions/modal';
+import { deployPictureInPicture } from '../actions/picture_in_picture';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
 import { boostModal, deleteModal } from '../initial_state';
 import { showAlertForError } from '../actions/alerts';
@@ -56,6 +57,7 @@ const makeMapStateToProps = () => {
 
   const mapStateToProps = (state, props) => ({
     status: getStatus(state, props),
+    usingPiP: state.get('picture_in_picture').statusId === props.id,
   });
 
   return mapStateToProps;
@@ -207,6 +209,10 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     dispatch(unblockDomain(domain));
   },
 
+  deployPictureInPicture (status, type, mediaProps) {
+    dispatch(deployPictureInPicture(status.get('id'), status.getIn(['account', 'id']), type, mediaProps));
+  },
+
 });
 
 export default injectIntl(connect(makeMapStateToProps, mapDispatchToProps)(Status));
diff --git a/app/javascript/mastodon/features/account/components/header.js b/app/javascript/mastodon/features/account/components/header.js
index 61ecf045d..2b97af4e6 100644
--- a/app/javascript/mastodon/features/account/components/header.js
+++ b/app/javascript/mastodon/features/account/components/header.js
@@ -7,6 +7,7 @@ import ImmutablePureComponent from 'react-immutable-pure-component';
 import { autoPlayGif, me, isStaff } from 'mastodon/initial_state';
 import classNames from 'classnames';
 import Icon from 'mastodon/components/icon';
+import IconButton from 'mastodon/components/icon_button';
 import Avatar from 'mastodon/components/avatar';
 import { counterRenderer } from 'mastodon/components/common_counter';
 import ShortNumber from 'mastodon/components/short_number';
@@ -35,6 +36,8 @@ const messages = defineMessages({
   unblockDomain: { id: 'account.unblock_domain', defaultMessage: 'Unblock domain {domain}' },
   hideReblogs: { id: 'account.hide_reblogs', defaultMessage: 'Hide boosts from @{name}' },
   showReblogs: { id: 'account.show_reblogs', defaultMessage: 'Show boosts from @{name}' },
+  enableNotifications: { id: 'account.enable_notifications', defaultMessage: 'Notify me when @{name} posts' },
+  disableNotifications: { id: 'account.disable_notifications', defaultMessage: 'Stop notifying me when @{name} posts' },
   pins: { id: 'navigation_bar.pins', defaultMessage: 'Pinned toots' },
   preferences: { id: 'navigation_bar.preferences', defaultMessage: 'Preferences' },
   follow_requests: { id: 'navigation_bar.follow_requests', defaultMessage: 'Follow requests' },
@@ -68,8 +71,9 @@ class Header extends ImmutablePureComponent {
     onBlock: PropTypes.func.isRequired,
     onMention: PropTypes.func.isRequired,
     onDirect: PropTypes.func.isRequired,
-    onReport: PropTypes.func.isRequired,
     onReblogToggle: PropTypes.func.isRequired,
+    onNotifyToggle: PropTypes.func.isRequired,
+    onReport: PropTypes.func.isRequired,
     onMute: PropTypes.func.isRequired,
     onBlockDomain: PropTypes.func.isRequired,
     onUnblockDomain: PropTypes.func.isRequired,
@@ -140,8 +144,11 @@ class Header extends ImmutablePureComponent {
       return null;
     }
 
+    const suspended = account.get('suspended');
+
     let info        = [];
     let actionBtn   = '';
+    let bellBtn     = '';
     let lockedIcon  = '';
     let menu        = [];
 
@@ -171,6 +178,10 @@ class Header extends ImmutablePureComponent {
       actionBtn = <Button className='logo-button' text={intl.formatMessage(messages.edit_profile)} onClick={this.openEditProfile} />;
     }
 
+    if (account.getIn(['relationship', 'requested']) || account.getIn(['relationship', 'following'])) {
+      bellBtn = <IconButton icon='bell-o' size={24} active={account.getIn(['relationship', 'notifying'])} title={intl.formatMessage(account.getIn(['relationship', 'notifying']) ? messages.disableNotifications : messages.enableNotifications, { name: account.get('username') })} onClick={this.props.onNotifyToggle} />;
+    }
+
     if (account.get('moved') && !account.getIn(['relationship', 'following'])) {
       actionBtn = '';
     }
@@ -268,7 +279,7 @@ class Header extends ImmutablePureComponent {
       <div className={classNames('account__header', { inactive: !!account.get('moved') })} ref={this.setRef}>
         <div className='account__header__image'>
           <div className='account__header__info'>
-            {info}
+            {!suspended && info}
           </div>
 
           <img src={autoPlayGif ? account.get('header') : account.get('header_static')} alt='' className='parallax' />
@@ -282,11 +293,14 @@ class Header extends ImmutablePureComponent {
 
             <div className='spacer' />
 
-            <div className='account__header__tabs__buttons'>
-              {actionBtn}
+            {!suspended && (
+              <div className='account__header__tabs__buttons'>
+                {actionBtn}
+                {bellBtn}
 
-              <DropdownMenuContainer items={menu} icon='ellipsis-v' size={24} direction='right' />
-            </div>
+                <DropdownMenuContainer items={menu} icon='ellipsis-v' size={24} direction='right' />
+              </div>
+            )}
           </div>
 
           <div className='account__header__tabs__name'>
@@ -298,7 +312,7 @@ class Header extends ImmutablePureComponent {
 
           <div className='account__header__extra'>
             <div className='account__header__bio'>
-              { (fields.size > 0 || identity_proofs.size > 0) && (
+              {(fields.size > 0 || identity_proofs.size > 0) && (
                 <div className='account__header__fields'>
                   {identity_proofs.map((proof, i) => (
                     <dl key={i}>
@@ -324,33 +338,35 @@ class Header extends ImmutablePureComponent {
                 </div>
               )}
 
-              {account.get('id') !== me && <AccountNoteContainer account={account} />}
+              {account.get('id') !== me && !suspended && <AccountNoteContainer account={account} />}
 
               {account.get('note').length > 0 && account.get('note') !== '<p></p>' && <div className='account__header__content' dangerouslySetInnerHTML={content} />}
             </div>
 
-            <div className='account__header__extra__links'>
-              <NavLink isActive={this.isStatusesPageActive} activeClassName='active' to={`/accounts/${account.get('id')}`} title={intl.formatNumber(account.get('statuses_count'))}>
-                <ShortNumber
-                  value={account.get('statuses_count')}
-                  renderer={counterRenderer('statuses')}
-                />
-              </NavLink>
-
-              <NavLink exact activeClassName='active' to={`/accounts/${account.get('id')}/following`} title={intl.formatNumber(account.get('following_count'))}>
-                <ShortNumber
-                  value={account.get('following_count')}
-                  renderer={counterRenderer('following')}
-                />
-              </NavLink>
-
-              <NavLink exact activeClassName='active' to={`/accounts/${account.get('id')}/followers`} title={intl.formatNumber(account.get('followers_count'))}>
-                <ShortNumber
-                  value={account.get('followers_count')}
-                  renderer={counterRenderer('followers')}
-                />
-              </NavLink>
-            </div>
+            {!suspended && (
+              <div className='account__header__extra__links'>
+                <NavLink isActive={this.isStatusesPageActive} activeClassName='active' to={`/accounts/${account.get('id')}`} title={intl.formatNumber(account.get('statuses_count'))}>
+                  <ShortNumber
+                    value={account.get('statuses_count')}
+                    renderer={counterRenderer('statuses')}
+                  />
+                </NavLink>
+
+                <NavLink exact activeClassName='active' to={`/accounts/${account.get('id')}/following`} title={intl.formatNumber(account.get('following_count'))}>
+                  <ShortNumber
+                    value={account.get('following_count')}
+                    renderer={counterRenderer('following')}
+                  />
+                </NavLink>
+
+                <NavLink exact activeClassName='active' to={`/accounts/${account.get('id')}/followers`} title={intl.formatNumber(account.get('followers_count'))}>
+                  <ShortNumber
+                    value={account.get('followers_count')}
+                    renderer={counterRenderer('followers')}
+                  />
+                </NavLink>
+              </div>
+            )}
           </div>
         </div>
       </div>
diff --git a/app/javascript/mastodon/features/account_gallery/index.js b/app/javascript/mastodon/features/account_gallery/index.js
index fc5aead48..e5caec0bc 100644
--- a/app/javascript/mastodon/features/account_gallery/index.js
+++ b/app/javascript/mastodon/features/account_gallery/index.js
@@ -15,12 +15,15 @@ import { ScrollContainer } from 'react-router-scroll-4';
 import LoadMore from 'mastodon/components/load_more';
 import MissingIndicator from 'mastodon/components/missing_indicator';
 import { openModal } from 'mastodon/actions/modal';
+import { FormattedMessage } from 'react-intl';
 
 const mapStateToProps = (state, props) => ({
   isAccount: !!state.getIn(['accounts', props.params.accountId]),
   attachments: getAccountGallery(state, props.params.accountId),
   isLoading: state.getIn(['timelines', `account:${props.params.accountId}:media`, 'isLoading']),
   hasMore: state.getIn(['timelines', `account:${props.params.accountId}:media`, 'hasMore']),
+  suspended: state.getIn(['accounts', props.params.accountId, 'suspended'], false),
+  blockedBy: state.getIn(['relationships', props.params.accountId, 'blocked_by'], false),
 });
 
 class LoadMoreMedia extends ImmutablePureComponent {
@@ -56,6 +59,8 @@ class AccountGallery extends ImmutablePureComponent {
     isLoading: PropTypes.bool,
     hasMore: PropTypes.bool,
     isAccount: PropTypes.bool,
+    blockedBy: PropTypes.bool,
+    suspended: PropTypes.bool,
     multiColumn: PropTypes.bool,
   };
 
@@ -119,7 +124,7 @@ class AccountGallery extends ImmutablePureComponent {
   }
 
   render () {
-    const { attachments, shouldUpdateScroll, isLoading, hasMore, isAccount, multiColumn } = this.props;
+    const { attachments, shouldUpdateScroll, isLoading, hasMore, isAccount, multiColumn, blockedBy, suspended } = this.props;
     const { width } = this.state;
 
     if (!isAccount) {
@@ -152,15 +157,21 @@ class AccountGallery extends ImmutablePureComponent {
           <div className='scrollable scrollable--flex' onScroll={this.handleScroll}>
             <HeaderContainer accountId={this.props.params.accountId} />
 
-            <div role='feed' className='account-gallery__container' ref={this.handleRef}>
-              {attachments.map((attachment, index) => attachment === null ? (
-                <LoadMoreMedia key={'more:' + attachments.getIn(index + 1, 'id')} maxId={index > 0 ? attachments.getIn(index - 1, 'id') : null} onLoadMore={this.handleLoadMore} />
-              ) : (
-                <MediaItem key={attachment.get('id')} attachment={attachment} displayWidth={width} onOpenMedia={this.handleOpenMedia} />
-              ))}
-
-              {loadOlder}
-            </div>
+            {(suspended || blockedBy) ? (
+              <div className='empty-column-indicator'>
+                <FormattedMessage id='empty_column.account_unavailable' defaultMessage='Profile unavailable' />
+              </div>
+            ) : (
+              <div role='feed' className='account-gallery__container' ref={this.handleRef}>
+                {attachments.map((attachment, index) => attachment === null ? (
+                  <LoadMoreMedia key={'more:' + attachments.getIn(index + 1, 'id')} maxId={index > 0 ? attachments.getIn(index - 1, 'id') : null} onLoadMore={this.handleLoadMore} />
+                ) : (
+                  <MediaItem key={attachment.get('id')} attachment={attachment} displayWidth={width} onOpenMedia={this.handleOpenMedia} />
+                ))}
+
+                {loadOlder}
+              </div>
+            )}
 
             {isLoading && attachments.size === 0 && (
               <div className='scrollable__append'>
diff --git a/app/javascript/mastodon/features/account_timeline/components/header.js b/app/javascript/mastodon/features/account_timeline/components/header.js
index abb15edcc..6b52defe4 100644
--- a/app/javascript/mastodon/features/account_timeline/components/header.js
+++ b/app/javascript/mastodon/features/account_timeline/components/header.js
@@ -55,6 +55,10 @@ export default class Header extends ImmutablePureComponent {
     this.props.onReblogToggle(this.props.account);
   }
 
+  handleNotifyToggle = () => {
+    this.props.onNotifyToggle(this.props.account);
+  }
+
   handleMute = () => {
     this.props.onMute(this.props.account);
   }
@@ -106,6 +110,7 @@ export default class Header extends ImmutablePureComponent {
           onMention={this.handleMention}
           onDirect={this.handleDirect}
           onReblogToggle={this.handleReblogToggle}
+          onNotifyToggle={this.handleNotifyToggle}
           onReport={this.handleReport}
           onMute={this.handleMute}
           onBlockDomain={this.handleBlockDomain}
diff --git a/app/javascript/mastodon/features/account_timeline/containers/header_container.js b/app/javascript/mastodon/features/account_timeline/containers/header_container.js
index 8728b4806..e12019547 100644
--- a/app/javascript/mastodon/features/account_timeline/containers/header_container.js
+++ b/app/javascript/mastodon/features/account_timeline/containers/header_container.js
@@ -76,9 +76,9 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
 
   onReblogToggle (account) {
     if (account.getIn(['relationship', 'showing_reblogs'])) {
-      dispatch(followAccount(account.get('id'), false));
+      dispatch(followAccount(account.get('id'), { reblogs: false }));
     } else {
-      dispatch(followAccount(account.get('id'), true));
+      dispatch(followAccount(account.get('id'), { reblogs: true }));
     }
   },
 
@@ -90,6 +90,14 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     }
   },
 
+  onNotifyToggle (account) {
+    if (account.getIn(['relationship', 'notifying'])) {
+      dispatch(followAccount(account.get('id'), { notify: false }));
+    } else {
+      dispatch(followAccount(account.get('id'), { notify: true }));
+    }
+  },
+
   onReport (account) {
     dispatch(initReport(account));
   },
diff --git a/app/javascript/mastodon/features/account_timeline/index.js b/app/javascript/mastodon/features/account_timeline/index.js
index b9a616266..cbc859805 100644
--- a/app/javascript/mastodon/features/account_timeline/index.js
+++ b/app/javascript/mastodon/features/account_timeline/index.js
@@ -31,6 +31,7 @@ const mapStateToProps = (state, { params: { accountId }, withReplies = false })
     featuredStatusIds: withReplies ? ImmutableList() : state.getIn(['timelines', `account:${accountId}:pinned`, 'items'], emptyList),
     isLoading: state.getIn(['timelines', `account:${path}`, 'isLoading']),
     hasMore: state.getIn(['timelines', `account:${path}`, 'hasMore']),
+    suspended: state.getIn(['accounts', accountId, 'suspended'], false),
     blockedBy: state.getIn(['relationships', accountId, 'blocked_by'], false),
   };
 };
@@ -57,6 +58,7 @@ class AccountTimeline extends ImmutablePureComponent {
     withReplies: PropTypes.bool,
     blockedBy: PropTypes.bool,
     isAccount: PropTypes.bool,
+    suspended: PropTypes.bool,
     remote: PropTypes.bool,
     remoteUrl: PropTypes.string,
     multiColumn: PropTypes.bool,
@@ -113,7 +115,7 @@ class AccountTimeline extends ImmutablePureComponent {
   }
 
   render () {
-    const { shouldUpdateScroll, statusIds, featuredStatusIds, isLoading, hasMore, blockedBy, isAccount, multiColumn, remote, remoteUrl } = this.props;
+    const { shouldUpdateScroll, statusIds, featuredStatusIds, isLoading, hasMore, blockedBy, suspended, isAccount, multiColumn, remote, remoteUrl } = this.props;
 
     if (!isAccount) {
       return (
@@ -134,7 +136,7 @@ class AccountTimeline extends ImmutablePureComponent {
 
     let emptyMessage;
 
-    if (blockedBy) {
+    if (suspended || blockedBy) {
       emptyMessage = <FormattedMessage id='empty_column.account_unavailable' defaultMessage='Profile unavailable' />;
     } else if (remote && statusIds.isEmpty()) {
       emptyMessage = <RemoteHint url={remoteUrl} />;
@@ -153,7 +155,7 @@ class AccountTimeline extends ImmutablePureComponent {
           alwaysPrepend
           append={remoteMessage}
           scrollKey='account_timeline'
-          statusIds={blockedBy ? emptyList : statusIds}
+          statusIds={(suspended || blockedBy) ? emptyList : statusIds}
           featuredStatusIds={featuredStatusIds}
           isLoading={isLoading}
           hasMore={hasMore}
diff --git a/app/javascript/mastodon/features/audio/index.js b/app/javascript/mastodon/features/audio/index.js
index 5b8172694..6954d2a4c 100644
--- a/app/javascript/mastodon/features/audio/index.js
+++ b/app/javascript/mastodon/features/audio/index.js
@@ -37,7 +37,11 @@ class Audio extends React.PureComponent {
     backgroundColor: PropTypes.string,
     foregroundColor: PropTypes.string,
     accentColor: PropTypes.string,
+    currentTime: PropTypes.number,
     autoPlay: PropTypes.bool,
+    volume: PropTypes.number,
+    muted: PropTypes.bool,
+    deployPictureInPicture: PropTypes.func,
   };
 
   state = {
@@ -64,6 +68,19 @@ class Audio extends React.PureComponent {
     }
   }
 
+  _pack() {
+    return {
+      src: this.props.src,
+      volume: this.audio.volume,
+      muted: this.audio.muted,
+      currentTime: this.audio.currentTime,
+      poster: this.props.poster,
+      backgroundColor: this.props.backgroundColor,
+      foregroundColor: this.props.foregroundColor,
+      accentColor: this.props.accentColor,
+    };
+  }
+
   _setDimensions () {
     const width  = this.player.offsetWidth;
     const height = this.props.fullscreen ? this.player.offsetHeight : (width / (16/9));
@@ -112,6 +129,10 @@ class Audio extends React.PureComponent {
   componentWillUnmount () {
     window.removeEventListener('scroll', this.handleScroll);
     window.removeEventListener('resize', this.handleResize);
+
+    if (!this.state.paused && this.audio && this.props.deployPictureInPicture) {
+      this.props.deployPictureInPicture('audio', this._pack());
+    }
   }
 
   togglePlay = () => {
@@ -248,7 +269,13 @@ class Audio extends React.PureComponent {
     const inView = (top <= (window.innerHeight || document.documentElement.clientHeight)) && (top + height >= 0);
 
     if (!this.state.paused && !inView) {
-      this.setState({ paused: true }, () => this.audio.pause());
+      this.audio.pause();
+
+      if (this.props.deployPictureInPicture) {
+        this.props.deployPictureInPicture('audio', this._pack());
+      }
+
+      this.setState({ paused: true });
     }
   }, 150, { trailing: true });
 
@@ -261,10 +288,22 @@ class Audio extends React.PureComponent {
   }
 
   handleLoadedData = () => {
-    const { autoPlay } = this.props;
+    const { autoPlay, currentTime, volume, muted } = this.props;
+
+    if (currentTime) {
+      this.audio.currentTime = currentTime;
+    }
+
+    if (volume !== undefined) {
+      this.audio.volume = volume;
+    }
+
+    if (muted !== undefined) {
+      this.audio.muted = muted;
+    }
 
     if (autoPlay) {
-      this.audio.play();
+      this.togglePlay();
     }
   }
 
@@ -350,7 +389,7 @@ class Audio extends React.PureComponent {
   render () {
     const { src, intl, alt, editable, autoPlay } = this.props;
     const { paused, muted, volume, currentTime, duration, buffer, dragging } = this.state;
-    const progress = (currentTime / duration) * 100;
+    const progress = Math.min((currentTime / duration) * 100, 100);
 
     return (
       <div className={classNames('audio-player', { editable })} ref={this.setPlayerRef} style={{ backgroundColor: this._getBackgroundColor(), color: this._getForegroundColor(), width: '100%', height: this.props.fullscreen ? '100%' : (this.state.height || this.props.height) }} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
diff --git a/app/javascript/mastodon/features/emoji/emoji.js b/app/javascript/mastodon/features/emoji/emoji.js
index 5237b25f0..5d9dad097 100644
--- a/app/javascript/mastodon/features/emoji/emoji.js
+++ b/app/javascript/mastodon/features/emoji/emoji.js
@@ -12,7 +12,7 @@ const emojiFilenames = (emojis) => {
 };
 
 // Emoji requiring extra borders depending on theme
-const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞']);
+const darkEmoji = emojiFilenames(['🎱', '🐜', '⚫', '🖤', '⬛', '◼️', '◾', '◼️', '✒️', '▪️', '💣', '🎳', '📷', '📸', '♣️', '🕶️', '✴️', '🔌', '💂‍♀️', '📽️', '🍳', '🦍', '💂', '🔪', '🕳️', '🕹️', '🕋', '🖊️', '🖋️', '💂‍♂️', '🎤', '🎓', '🎥', '🎼', '♠️', '🎩', '🦃', '📼', '📹', '🎮', '🐃', '🏴', '🐞', '🕺']);
 const lightEmoji = emojiFilenames(['👽', '⚾', '🐔', '☁️', '💨', '🕊️', '👀', '🍥', '👻', '🐐', '❕', '❔', '⛸️', '🌩️', '🔊', '🔇', '📃', '🌧️', '🐏', '🍚', '🍙', '🐓', '🐑', '💀', '☠️', '🌨️', '🔉', '🔈', '💬', '💭', '🏐', '🏳️', '⚪', '⬜', '◽', '◻️', '▫️']);
 
 const emojiFilename = (filename) => {
diff --git a/app/javascript/mastodon/features/notifications/components/filter_bar.js b/app/javascript/mastodon/features/notifications/components/filter_bar.js
index 2fd28d832..368eb0b7e 100644
--- a/app/javascript/mastodon/features/notifications/components/filter_bar.js
+++ b/app/javascript/mastodon/features/notifications/components/filter_bar.js
@@ -9,6 +9,7 @@ const tooltips = defineMessages({
   boosts: { id: 'notifications.filter.boosts', defaultMessage: 'Boosts' },
   polls: { id: 'notifications.filter.polls', defaultMessage: 'Poll results' },
   follows: { id: 'notifications.filter.follows', defaultMessage: 'Follows' },
+  statuses: { id: 'notifications.filter.statuses', defaultMessage: 'Updates from people you follow' },
 });
 
 export default @injectIntl
@@ -88,6 +89,13 @@ class FilterBar extends React.PureComponent {
           <Icon id='tasks' fixedWidth />
         </button>
         <button
+          className={selectedFilter === 'status' ? 'active' : ''}
+          onClick={this.onClick('status')}
+          title={intl.formatMessage(tooltips.statuses)}
+        >
+          <Icon id='home' fixedWidth />
+        </button>
+        <button
           className={selectedFilter === 'follow' ? 'active' : ''}
           onClick={this.onClick('follow')}
           title={intl.formatMessage(tooltips.follows)}
diff --git a/app/javascript/mastodon/features/notifications/components/notification.js b/app/javascript/mastodon/features/notifications/components/notification.js
index 74065e5e2..94fdbd6f4 100644
--- a/app/javascript/mastodon/features/notifications/components/notification.js
+++ b/app/javascript/mastodon/features/notifications/components/notification.js
@@ -10,6 +10,7 @@ import AccountContainer from 'mastodon/containers/account_container';
 import FollowRequestContainer from '../containers/follow_request_container';
 import Icon from 'mastodon/components/icon';
 import Permalink from 'mastodon/components/permalink';
+import classNames from 'classnames';
 
 const messages = defineMessages({
   favourite: { id: 'notification.favourite', defaultMessage: '{name} favourited your status' },
@@ -17,6 +18,7 @@ const messages = defineMessages({
   ownPoll: { id: 'notification.own_poll', defaultMessage: 'Your poll has ended' },
   poll: { id: 'notification.poll', defaultMessage: 'A poll you have voted in has ended' },
   reblog: { id: 'notification.reblog', defaultMessage: '{name} boosted your status' },
+  status: { id: 'notification.status', defaultMessage: '{name} just posted' },
 });
 
 const notificationForScreenReader = (intl, message, timestamp) => {
@@ -49,6 +51,7 @@ class Notification extends ImmutablePureComponent {
     updateScrollBottom: PropTypes.func,
     cacheMediaWidth: PropTypes.func,
     cachedMediaWidth: PropTypes.number,
+    unread: PropTypes.bool,
   };
 
   handleMoveUp = () => {
@@ -113,11 +116,11 @@ class Notification extends ImmutablePureComponent {
   }
 
   renderFollow (notification, account, link) {
-    const { intl } = this.props;
+    const { intl, unread } = this.props;
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className='notification notification-follow focusable' tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.follow, { name: account.get('acct') }), notification.get('created_at'))}>
+        <div className={classNames('notification notification-follow focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.follow, { name: account.get('acct') }), notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
               <Icon id='user-plus' fixedWidth />
@@ -135,11 +138,11 @@ class Notification extends ImmutablePureComponent {
   }
 
   renderFollowRequest (notification, account, link) {
-    const { intl } = this.props;
+    const { intl, unread } = this.props;
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className='notification notification-follow-request focusable' tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage({ id: 'notification.follow_request', defaultMessage: '{name} has requested to follow you' }, { name: account.get('acct') }), notification.get('created_at'))}>
+        <div className={classNames('notification notification-follow-request focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage({ id: 'notification.follow_request', defaultMessage: '{name} has requested to follow you' }, { name: account.get('acct') }), notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
               <Icon id='user' fixedWidth />
@@ -169,16 +172,17 @@ class Notification extends ImmutablePureComponent {
         updateScrollBottom={this.props.updateScrollBottom}
         cachedMediaWidth={this.props.cachedMediaWidth}
         cacheMediaWidth={this.props.cacheMediaWidth}
+        unread={this.props.unread}
       />
     );
   }
 
   renderFavourite (notification, link) {
-    const { intl } = this.props;
+    const { intl, unread } = this.props;
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className='notification notification-favourite focusable' tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.favourite, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
+        <div className={classNames('notification notification-favourite focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.favourite, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
               <Icon id='star' className='star-icon' fixedWidth />
@@ -206,11 +210,11 @@ class Notification extends ImmutablePureComponent {
   }
 
   renderReblog (notification, link) {
-    const { intl } = this.props;
+    const { intl, unread } = this.props;
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className='notification notification-reblog focusable' tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.reblog, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
+        <div className={classNames('notification notification-reblog focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.reblog, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
               <Icon id='retweet' fixedWidth />
@@ -237,14 +241,46 @@ class Notification extends ImmutablePureComponent {
     );
   }
 
+  renderStatus (notification, link) {
+    const { intl, unread } = this.props;
+
+    return (
+      <HotKeys handlers={this.getHandlers()}>
+        <div className={classNames('notification notification-status focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, intl.formatMessage(messages.status, { name: notification.getIn(['account', 'acct']) }), notification.get('created_at'))}>
+          <div className='notification__message'>
+            <div className='notification__favourite-icon-wrapper'>
+              <Icon id='home' fixedWidth />
+            </div>
+
+            <span title={notification.get('created_at')}>
+              <FormattedMessage id='notification.status' defaultMessage='{name} just posted' values={{ name: link }} />
+            </span>
+          </div>
+
+          <StatusContainer
+            id={notification.get('status')}
+            account={notification.get('account')}
+            muted
+            withDismiss
+            hidden={this.props.hidden}
+            getScrollPosition={this.props.getScrollPosition}
+            updateScrollBottom={this.props.updateScrollBottom}
+            cachedMediaWidth={this.props.cachedMediaWidth}
+            cacheMediaWidth={this.props.cacheMediaWidth}
+          />
+        </div>
+      </HotKeys>
+    );
+  }
+
   renderPoll (notification, account) {
-    const { intl } = this.props;
+    const { intl, unread } = this.props;
     const ownPoll  = me === account.get('id');
     const message  = ownPoll ? intl.formatMessage(messages.ownPoll) : intl.formatMessage(messages.poll);
 
     return (
       <HotKeys handlers={this.getHandlers()}>
-        <div className='notification notification-poll focusable' tabIndex='0' aria-label={notificationForScreenReader(intl, message, notification.get('created_at'))}>
+        <div className={classNames('notification notification-poll focusable', { unread })} tabIndex='0' aria-label={notificationForScreenReader(intl, message, notification.get('created_at'))}>
           <div className='notification__message'>
             <div className='notification__favourite-icon-wrapper'>
               <Icon id='tasks' fixedWidth />
@@ -292,6 +328,8 @@ class Notification extends ImmutablePureComponent {
       return this.renderFavourite(notification, link);
     case 'reblog':
       return this.renderReblog(notification, link);
+    case 'status':
+      return this.renderStatus(notification, link);
     case 'poll':
       return this.renderPoll(notification, account);
     }
diff --git a/app/javascript/mastodon/features/notifications/index.js b/app/javascript/mastodon/features/notifications/index.js
index d16a0f33a..41a45b2b6 100644
--- a/app/javascript/mastodon/features/notifications/index.js
+++ b/app/javascript/mastodon/features/notifications/index.js
@@ -4,7 +4,14 @@ import PropTypes from 'prop-types';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import Column from '../../components/column';
 import ColumnHeader from '../../components/column_header';
-import { expandNotifications, scrollTopNotifications, loadPending, mountNotifications, unmountNotifications } from '../../actions/notifications';
+import {
+  expandNotifications,
+  scrollTopNotifications,
+  loadPending,
+  mountNotifications,
+  unmountNotifications,
+  markNotificationsAsRead,
+} from '../../actions/notifications';
 import { addColumn, removeColumn, moveColumn } from '../../actions/columns';
 import NotificationContainer from './containers/notification_container';
 import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
@@ -15,9 +22,12 @@ import { List as ImmutableList } from 'immutable';
 import { debounce } from 'lodash';
 import ScrollableList from '../../components/scrollable_list';
 import LoadGap from '../../components/load_gap';
+import Icon from 'mastodon/components/icon';
+import compareId from 'mastodon/compare_id';
 
 const messages = defineMessages({
   title: { id: 'column.notifications', defaultMessage: 'Notifications' },
+  markAsRead : { id: 'notifications.mark_as_read', defaultMessage: 'Mark every notification as read' },
 });
 
 const getNotifications = createSelector([
@@ -32,7 +42,7 @@ const getNotifications = createSelector([
     // we need to turn it off for FilterBar in order not to block ourselves from seeing a specific category
     return notifications.filterNot(item => item !== null && excludedTypes.includes(item.get('type')));
   }
-  return notifications.filter(item => item !== null && allowedType === item.get('type'));
+  return notifications.filter(item => item === null || allowedType === item.get('type'));
 });
 
 const mapStateToProps = state => ({
@@ -42,6 +52,8 @@ const mapStateToProps = state => ({
   isUnread: state.getIn(['notifications', 'unread']) > 0 || state.getIn(['notifications', 'pendingItems']).size > 0,
   hasMore: state.getIn(['notifications', 'hasMore']),
   numPending: state.getIn(['notifications', 'pendingItems'], ImmutableList()).size,
+  lastReadId: state.getIn(['notifications', 'readMarkerId']),
+  canMarkAsRead: state.getIn(['notifications', 'readMarkerId']) !== '0' && getNotifications(state).some(item => item !== null && compareId(item.get('id'), state.getIn(['notifications', 'readMarkerId'])) > 0),
 });
 
 export default @connect(mapStateToProps)
@@ -60,6 +72,8 @@ class Notifications extends React.PureComponent {
     multiColumn: PropTypes.bool,
     hasMore: PropTypes.bool,
     numPending: PropTypes.number,
+    lastReadId: PropTypes.string,
+    canMarkAsRead: PropTypes.bool,
   };
 
   static defaultProps = {
@@ -146,8 +160,12 @@ class Notifications extends React.PureComponent {
     }
   }
 
+  handleMarkAsRead = () => {
+    this.props.dispatch(markNotificationsAsRead());
+  };
+
   render () {
-    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore, numPending, showFilterBar } = this.props;
+    const { intl, notifications, shouldUpdateScroll, isLoading, isUnread, columnId, multiColumn, hasMore, numPending, showFilterBar, lastReadId, canMarkAsRead } = this.props;
     const pinned = !!columnId;
     const emptyMessage = <FormattedMessage id='empty_column.notifications' defaultMessage="You don't have any notifications yet. Interact with others to start the conversation." />;
 
@@ -174,6 +192,7 @@ class Notifications extends React.PureComponent {
           accountId={item.get('account')}
           onMoveUp={this.handleMoveUp}
           onMoveDown={this.handleMoveDown}
+          unread={lastReadId !== '0' && compareId(item.get('id'), lastReadId) > 0}
         />
       ));
     } else {
@@ -202,6 +221,21 @@ class Notifications extends React.PureComponent {
       </ScrollableList>
     );
 
+    let extraButton = null;
+
+    if (canMarkAsRead) {
+      extraButton = (
+        <button
+          aria-label={intl.formatMessage(messages.markAsRead)}
+          title={intl.formatMessage(messages.markAsRead)}
+          onClick={this.handleMarkAsRead}
+          className='column-header__button'
+        >
+          <Icon id='check' />
+        </button>
+      );
+    }
+
     return (
       <Column bindToDocument={!multiColumn} ref={this.setColumnRef} label={intl.formatMessage(messages.title)}>
         <ColumnHeader
@@ -213,6 +247,7 @@ class Notifications extends React.PureComponent {
           onClick={this.handleHeaderClick}
           pinned={pinned}
           multiColumn={multiColumn}
+          extraButton={extraButton}
         >
           <ColumnSettingsContainer />
         </ColumnHeader>
diff --git a/app/javascript/mastodon/features/picture_in_picture/components/footer.js b/app/javascript/mastodon/features/picture_in_picture/components/footer.js
new file mode 100644
index 000000000..086cda954
--- /dev/null
+++ b/app/javascript/mastodon/features/picture_in_picture/components/footer.js
@@ -0,0 +1,137 @@
+import React from 'react';
+import { connect } from 'react-redux';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import IconButton from 'mastodon/components/icon_button';
+import classNames from 'classnames';
+import { me, boostModal } from 'mastodon/initial_state';
+import { defineMessages, injectIntl } from 'react-intl';
+import { replyCompose } from 'mastodon/actions/compose';
+import { reblog, favourite, unreblog, unfavourite } from 'mastodon/actions/interactions';
+import { makeGetStatus } from 'mastodon/selectors';
+import { openModal } from 'mastodon/actions/modal';
+
+const messages = defineMessages({
+  reply: { id: 'status.reply', defaultMessage: 'Reply' },
+  replyAll: { id: 'status.replyAll', defaultMessage: 'Reply to thread' },
+  reblog: { id: 'status.reblog', defaultMessage: 'Boost' },
+  reblog_private: { id: 'status.reblog_private', defaultMessage: 'Boost with original visibility' },
+  cancel_reblog_private: { id: 'status.cancel_reblog_private', defaultMessage: 'Unboost' },
+  cannot_reblog: { id: 'status.cannot_reblog', defaultMessage: 'This post cannot be boosted' },
+  favourite: { id: 'status.favourite', defaultMessage: 'Favourite' },
+  replyConfirm: { id: 'confirmations.reply.confirm', defaultMessage: 'Reply' },
+  replyMessage: { id: 'confirmations.reply.message', defaultMessage: 'Replying now will overwrite the message you are currently composing. Are you sure you want to proceed?' },
+});
+
+const makeMapStateToProps = () => {
+  const getStatus = makeGetStatus();
+
+  const mapStateToProps = (state, { statusId }) => ({
+    status: getStatus(state, { id: statusId }),
+    askReplyConfirmation: state.getIn(['compose', 'text']).trim().length !== 0,
+  });
+
+  return mapStateToProps;
+};
+
+export default @connect(makeMapStateToProps)
+@injectIntl
+class Footer extends ImmutablePureComponent {
+
+  static contextTypes = {
+    router: PropTypes.object,
+  };
+
+  static propTypes = {
+    statusId: PropTypes.string.isRequired,
+    status: ImmutablePropTypes.map.isRequired,
+    intl: PropTypes.object.isRequired,
+    dispatch: PropTypes.func.isRequired,
+    askReplyConfirmation: PropTypes.bool,
+  };
+
+  _performReply = () => {
+    const { dispatch, status } = this.props;
+    dispatch(replyCompose(status, this.context.router.history));
+  };
+
+  handleReplyClick = () => {
+    const { dispatch, askReplyConfirmation, intl } = this.props;
+
+    if (askReplyConfirmation) {
+      dispatch(openModal('CONFIRM', {
+        message: intl.formatMessage(messages.replyMessage),
+        confirm: intl.formatMessage(messages.replyConfirm),
+        onConfirm: this._performReply,
+      }));
+    } else {
+      this._performReply();
+    }
+  };
+
+  handleFavouriteClick = () => {
+    const { dispatch, status } = this.props;
+
+    if (status.get('favourited')) {
+      dispatch(unfavourite(status));
+    } else {
+      dispatch(favourite(status));
+    }
+  };
+
+  _performReblog = () => {
+    const { dispatch, status } = this.props;
+    dispatch(reblog(status));
+  }
+
+  handleReblogClick = e => {
+    const { dispatch, status } = this.props;
+
+    if (status.get('reblogged')) {
+      dispatch(unreblog(status));
+    } else if ((e && e.shiftKey) || !boostModal) {
+      this._performReblog();
+    } else {
+      dispatch(openModal('BOOST', { status, onReblog: this._performReblog }));
+    }
+  };
+
+  render () {
+    const { status, intl } = this.props;
+
+    const publicStatus  = ['public', 'unlisted'].includes(status.get('visibility'));
+    const reblogPrivate = status.getIn(['account', 'id']) === me && status.get('visibility') === 'private';
+
+    let replyIcon, replyTitle;
+
+    if (status.get('in_reply_to_id', null) === null) {
+      replyIcon = 'reply';
+      replyTitle = intl.formatMessage(messages.reply);
+    } else {
+      replyIcon = 'reply-all';
+      replyTitle = intl.formatMessage(messages.replyAll);
+    }
+
+    let reblogTitle = '';
+
+    if (status.get('reblogged')) {
+      reblogTitle = intl.formatMessage(messages.cancel_reblog_private);
+    } else if (publicStatus) {
+      reblogTitle = intl.formatMessage(messages.reblog);
+    } else if (reblogPrivate) {
+      reblogTitle = intl.formatMessage(messages.reblog_private);
+    } else {
+      reblogTitle = intl.formatMessage(messages.cannot_reblog);
+    }
+
+    return (
+      <div className='picture-in-picture__footer'>
+        <IconButton className='status__action-bar-button' title={replyTitle} icon={status.get('in_reply_to_account_id') === status.getIn(['account', 'id']) ? 'reply' : replyIcon} onClick={this.handleReplyClick} counter={status.get('replies_count')} obfuscateCount />
+        <IconButton className={classNames('status__action-bar-button', { reblogPrivate })} disabled={!publicStatus && !reblogPrivate}  active={status.get('reblogged')} pressed={status.get('reblogged')} title={reblogTitle} icon='retweet' onClick={this.handleReblogClick} counter={status.get('reblogs_count')} />
+        <IconButton className='status__action-bar-button star-icon' animate active={status.get('favourited')} pressed={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} counter={status.get('favourites_count')} />
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/features/picture_in_picture/components/header.js b/app/javascript/mastodon/features/picture_in_picture/components/header.js
new file mode 100644
index 000000000..4cb6de1a4
--- /dev/null
+++ b/app/javascript/mastodon/features/picture_in_picture/components/header.js
@@ -0,0 +1,40 @@
+import React from 'react';
+import { connect } from 'react-redux';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import IconButton from 'mastodon/components/icon_button';
+import { Link } from 'react-router-dom';
+import Avatar from 'mastodon/components/avatar';
+import DisplayName from 'mastodon/components/display_name';
+
+const mapStateToProps = (state, { accountId }) => ({
+  account: state.getIn(['accounts', accountId]),
+});
+
+export default @connect(mapStateToProps)
+class Header extends ImmutablePureComponent {
+
+  static propTypes = {
+    accountId: PropTypes.string.isRequired,
+    statusId: PropTypes.string.isRequired,
+    account: ImmutablePropTypes.map.isRequired,
+    onClose: PropTypes.func.isRequired,
+  };
+
+  render () {
+    const { account, statusId, onClose } = this.props;
+
+    return (
+      <div className='picture-in-picture__header'>
+        <Link to={`/statuses/${statusId}`} className='picture-in-picture__header__account'>
+          <Avatar account={account} size={36} />
+          <DisplayName account={account} />
+        </Link>
+
+        <IconButton icon='times' onClick={onClose} title='Close' />
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/features/picture_in_picture/index.js b/app/javascript/mastodon/features/picture_in_picture/index.js
new file mode 100644
index 000000000..1e59fbcd3
--- /dev/null
+++ b/app/javascript/mastodon/features/picture_in_picture/index.js
@@ -0,0 +1,85 @@
+import React from 'react';
+import { connect } from 'react-redux';
+import PropTypes from 'prop-types';
+import Video from 'mastodon/features/video';
+import Audio from 'mastodon/features/audio';
+import { removePictureInPicture } from 'mastodon/actions/picture_in_picture';
+import Header from './components/header';
+import Footer from './components/footer';
+
+const mapStateToProps = state => ({
+  ...state.get('picture_in_picture'),
+});
+
+export default @connect(mapStateToProps)
+class PictureInPicture extends React.Component {
+
+  static propTypes = {
+    statusId: PropTypes.string,
+    accountId: PropTypes.string,
+    type: PropTypes.string,
+    src: PropTypes.string,
+    muted: PropTypes.bool,
+    volume: PropTypes.number,
+    currentTime: PropTypes.number,
+    poster: PropTypes.string,
+    backgroundColor: PropTypes.string,
+    foregroundColor: PropTypes.string,
+    accentColor: PropTypes.string,
+    dispatch: PropTypes.func.isRequired,
+  };
+
+  handleClose = () => {
+    const { dispatch } = this.props;
+    dispatch(removePictureInPicture());
+  }
+
+  render () {
+    const { type, src, currentTime, accountId, statusId } = this.props;
+
+    if (!currentTime) {
+      return null;
+    }
+
+    let player;
+
+    if (type === 'video') {
+      player = (
+        <Video
+          src={src}
+          currentTime={this.props.currentTime}
+          volume={this.props.volume}
+          muted={this.props.muted}
+          autoPlay
+          inline
+          alwaysVisible
+        />
+      );
+    } else if (type === 'audio') {
+      player = (
+        <Audio
+          src={src}
+          currentTime={this.props.currentTime}
+          volume={this.props.volume}
+          muted={this.props.muted}
+          poster={this.props.poster}
+          backgroundColor={this.props.backgroundColor}
+          foregroundColor={this.props.foregroundColor}
+          accentColor={this.props.accentColor}
+          autoPlay
+        />
+      );
+    }
+
+    return (
+      <div className='picture-in-picture'>
+        <Header accountId={accountId} statusId={statusId} onClose={this.handleClose} />
+
+        {player}
+
+        <Footer statusId={statusId} />
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/features/status/components/detailed_status.js b/app/javascript/mastodon/features/status/components/detailed_status.js
index b1ae0b2cc..c2b883f7f 100644
--- a/app/javascript/mastodon/features/status/components/detailed_status.js
+++ b/app/javascript/mastodon/features/status/components/detailed_status.js
@@ -15,6 +15,7 @@ import scheduleIdleTask from '../../ui/util/schedule_idle_task';
 import classNames from 'classnames';
 import Icon from 'mastodon/components/icon';
 import AnimatedNumber from 'mastodon/components/animated_number';
+import PictureInPicturePlaceholder from 'mastodon/components/picture_in_picture_placeholder';
 
 const messages = defineMessages({
   public_short: { id: 'privacy.public.short', defaultMessage: 'Public' },
@@ -40,6 +41,7 @@ class DetailedStatus extends ImmutablePureComponent {
     domain: PropTypes.string.isRequired,
     compact: PropTypes.bool,
     showMedia: PropTypes.bool,
+    usingPiP: PropTypes.bool,
     onToggleMediaVisibility: PropTypes.func,
   };
 
@@ -100,7 +102,7 @@ class DetailedStatus extends ImmutablePureComponent {
   render () {
     const status = (this.props.status && this.props.status.get('reblog')) ? this.props.status.get('reblog') : this.props.status;
     const outerStyle = { boxSizing: 'border-box' };
-    const { intl, compact } = this.props;
+    const { intl, compact, usingPiP } = this.props;
 
     if (!status) {
       return null;
@@ -116,7 +118,9 @@ class DetailedStatus extends ImmutablePureComponent {
       outerStyle.height = `${this.state.height}px`;
     }
 
-    if (status.get('media_attachments').size > 0) {
+    if (usingPiP) {
+      media = <PictureInPicturePlaceholder />;
+    } else if (status.get('media_attachments').size > 0) {
       if (status.getIn(['media_attachments', 0, 'type']) === 'audio') {
         const attachment = status.getIn(['media_attachments', 0]);
 
diff --git a/app/javascript/mastodon/features/status/index.js b/app/javascript/mastodon/features/status/index.js
index 179df53a1..cf3a5fa44 100644
--- a/app/javascript/mastodon/features/status/index.js
+++ b/app/javascript/mastodon/features/status/index.js
@@ -143,6 +143,7 @@ const makeMapStateToProps = () => {
       descendantsIds,
       askReplyConfirmation: state.getIn(['compose', 'text']).trim().length !== 0,
       domain: state.getIn(['meta', 'domain']),
+      usingPiP: state.get('picture_in_picture').statusId === props.params.statusId,
     };
   };
 
@@ -167,6 +168,7 @@ class Status extends ImmutablePureComponent {
     askReplyConfirmation: PropTypes.bool,
     multiColumn: PropTypes.bool,
     domain: PropTypes.string.isRequired,
+    usingPiP: PropTypes.bool,
   };
 
   state = {
@@ -492,7 +494,7 @@ class Status extends ImmutablePureComponent {
 
   render () {
     let ancestors, descendants;
-    const { shouldUpdateScroll, status, ancestorsIds, descendantsIds, intl, domain, multiColumn } = this.props;
+    const { shouldUpdateScroll, status, ancestorsIds, descendantsIds, intl, domain, multiColumn, usingPiP } = this.props;
     const { fullscreen } = this.state;
 
     if (status === null) {
@@ -550,6 +552,7 @@ class Status extends ImmutablePureComponent {
                   domain={domain}
                   showMedia={this.state.showMedia}
                   onToggleMediaVisibility={this.handleToggleMediaVisibility}
+                  usingPiP={usingPiP}
                 />
 
                 <ActionBar
diff --git a/app/javascript/mastodon/features/ui/components/media_modal.js b/app/javascript/mastodon/features/ui/components/media_modal.js
index d7f97f210..a02e3bbd7 100644
--- a/app/javascript/mastodon/features/ui/components/media_modal.js
+++ b/app/javascript/mastodon/features/ui/components/media_modal.js
@@ -160,7 +160,7 @@ class MediaModal extends ImmutablePureComponent {
             src={image.get('url')}
             width={image.get('width')}
             height={image.get('height')}
-            startTime={time || 0}
+            currentTime={time || 0}
             onCloseVideo={onClose}
             detailed
             alt={image.get('description')}
diff --git a/app/javascript/mastodon/features/ui/components/video_modal.js b/app/javascript/mastodon/features/ui/components/video_modal.js
index e28bd5b49..9a07e7c4d 100644
--- a/app/javascript/mastodon/features/ui/components/video_modal.js
+++ b/app/javascript/mastodon/features/ui/components/video_modal.js
@@ -66,9 +66,9 @@ export default class VideoModal extends ImmutablePureComponent {
             preview={media.get('preview_url')}
             blurhash={media.get('blurhash')}
             src={media.get('url')}
-            startTime={options.startTime}
+            currentTime={options.startTime}
             autoPlay={options.autoPlay}
-            defaultVolume={options.defaultVolume}
+            volume={options.defaultVolume}
             onCloseVideo={onClose}
             detailed
             alt={media.get('description')}
diff --git a/app/javascript/mastodon/features/ui/index.js b/app/javascript/mastodon/features/ui/index.js
index 553cb3365..d05133507 100644
--- a/app/javascript/mastodon/features/ui/index.js
+++ b/app/javascript/mastodon/features/ui/index.js
@@ -16,11 +16,12 @@ import { expandNotifications } from '../../actions/notifications';
 import { fetchFilters } from '../../actions/filters';
 import { clearHeight } from '../../actions/height_cache';
 import { focusApp, unfocusApp } from 'mastodon/actions/app';
-import { synchronouslySubmitMarkers } from 'mastodon/actions/markers';
+import { synchronouslySubmitMarkers, submitMarkers, fetchMarkers } from 'mastodon/actions/markers';
 import { WrappedSwitch, WrappedRoute } from './util/react_router_helpers';
 import UploadArea from './components/upload_area';
 import ColumnsAreaContainer from './containers/columns_area_container';
 import DocumentTitle from './components/document_title';
+import PictureInPicture from 'mastodon/features/picture_in_picture';
 import {
   Compose,
   Status,
@@ -265,6 +266,7 @@ class UI extends React.PureComponent {
 
   handleWindowFocus = () => {
     this.props.dispatch(focusApp());
+    this.props.dispatch(submitMarkers());
   }
 
   handleWindowBlur = () => {
@@ -368,6 +370,7 @@ class UI extends React.PureComponent {
       window.setTimeout(() => Notification.requestPermission(), 120 * 1000);
     }
 
+    this.props.dispatch(fetchMarkers());
     this.props.dispatch(expandHomeTimeline());
     this.props.dispatch(expandNotifications());
 
@@ -545,6 +548,7 @@ class UI extends React.PureComponent {
             {children}
           </SwitchingColumnsArea>
 
+          <PictureInPicture />
           <NotificationsContainer />
           <LoadingBarContainer className='loading-bar' />
           <ModalContainer />
diff --git a/app/javascript/mastodon/features/video/index.js b/app/javascript/mastodon/features/video/index.js
index 99dcdca22..54c3baf76 100644
--- a/app/javascript/mastodon/features/video/index.js
+++ b/app/javascript/mastodon/features/video/index.js
@@ -104,20 +104,23 @@ class Video extends React.PureComponent {
     width: PropTypes.number,
     height: PropTypes.number,
     sensitive: PropTypes.bool,
-    startTime: PropTypes.number,
+    currentTime: PropTypes.number,
     onOpenVideo: PropTypes.func,
     onCloseVideo: PropTypes.func,
     detailed: PropTypes.bool,
     inline: PropTypes.bool,
     editable: PropTypes.bool,
+    alwaysVisible: PropTypes.bool,
     cacheWidth: PropTypes.func,
     visible: PropTypes.bool,
     onToggleVisibility: PropTypes.func,
+    deployPictureInPicture: PropTypes.func,
     intl: PropTypes.object.isRequired,
     blurhash: PropTypes.string,
     link: PropTypes.node,
     autoPlay: PropTypes.bool,
-    defaultVolume: PropTypes.number,
+    volume: PropTypes.number,
+    muted: PropTypes.bool,
   };
 
   state = {
@@ -297,6 +300,15 @@ class Video extends React.PureComponent {
     document.removeEventListener('webkitfullscreenchange', this.handleFullscreenChange, true);
     document.removeEventListener('mozfullscreenchange', this.handleFullscreenChange, true);
     document.removeEventListener('MSFullscreenChange', this.handleFullscreenChange, true);
+
+    if (!this.state.paused && this.video && this.props.deployPictureInPicture) {
+      this.props.deployPictureInPicture('video', {
+        src: this.props.src,
+        currentTime: this.video.currentTime,
+        muted: this.video.muted,
+        volume: this.video.volume,
+      });
+    }
   }
 
   componentWillReceiveProps (nextProps) {
@@ -328,7 +340,18 @@ class Video extends React.PureComponent {
     const inView = (top <= (window.innerHeight || document.documentElement.clientHeight)) && (top + height >= 0);
 
     if (!this.state.paused && !inView) {
-      this.setState({ paused: true }, () => this.video.pause());
+      this.video.pause();
+
+      if (this.props.deployPictureInPicture) {
+        this.props.deployPictureInPicture('video', {
+          src: this.props.src,
+          currentTime: this.video.currentTime,
+          muted: this.video.muted,
+          volume: this.video.volume,
+        });
+      }
+
+      this.setState({ paused: true });
     }
   }, 150, { trailing: true })
 
@@ -361,15 +384,21 @@ class Video extends React.PureComponent {
   }
 
   handleLoadedData = () => {
-    if (this.props.startTime) {
-      this.video.currentTime = this.props.startTime;
+    const { currentTime, volume, muted, autoPlay } = this.props;
+
+    if (currentTime) {
+      this.video.currentTime = currentTime;
     }
 
-    if (this.props.defaultVolume !== undefined) {
-      this.video.volume = this.props.defaultVolume;
+    if (volume !== undefined) {
+      this.video.volume = volume;
+    }
+
+    if (muted !== undefined) {
+      this.video.muted = muted;
     }
 
-    if (this.props.autoPlay) {
+    if (autoPlay) {
       this.video.play();
     }
   }
@@ -414,9 +443,9 @@ class Video extends React.PureComponent {
   }
 
   render () {
-    const { preview, src, inline, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed, sensitive, link, editable, blurhash } = this.props;
+    const { preview, src, inline, onOpenVideo, onCloseVideo, intl, alt, detailed, sensitive, link, editable, blurhash } = this.props;
     const { containerWidth, currentTime, duration, volume, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
-    const progress = (currentTime / duration) * 100;
+    const progress = Math.min((currentTime / duration) * 100, 100);
     const playerStyle = {};
 
     let { width, height } = this.props;
@@ -430,7 +459,7 @@ class Video extends React.PureComponent {
 
     let preload;
 
-    if (startTime || fullscreen || dragging) {
+    if (this.props.currentTime || fullscreen || dragging) {
       preload = 'auto';
     } else if (detailed) {
       preload = 'metadata';
@@ -530,7 +559,7 @@ class Video extends React.PureComponent {
             </div>
 
             <div className='video-player__buttons right'>
-              {(!onCloseVideo && !editable && !fullscreen) && <button type='button' title={intl.formatMessage(messages.hide)} aria-label={intl.formatMessage(messages.hide)} onClick={this.toggleReveal}><Icon id='eye-slash' fixedWidth /></button>}
+              {(!onCloseVideo && !editable && !fullscreen && !this.props.alwaysVisible) && <button type='button' title={intl.formatMessage(messages.hide)} aria-label={intl.formatMessage(messages.hide)} onClick={this.toggleReveal}><Icon id='eye-slash' fixedWidth /></button>}
               {(!fullscreen && onOpenVideo) && <button type='button' title={intl.formatMessage(messages.expand)} aria-label={intl.formatMessage(messages.expand)} onClick={this.handleOpenVideo}><Icon id='expand' fixedWidth /></button>}
               {onCloseVideo && <button type='button' title={intl.formatMessage(messages.close)} aria-label={intl.formatMessage(messages.close)} onClick={this.handleCloseVideo}><Icon id='compress' fixedWidth /></button>}
               <button type='button' title={intl.formatMessage(fullscreen ? messages.exit_fullscreen : messages.fullscreen)} aria-label={intl.formatMessage(fullscreen ? messages.exit_fullscreen : messages.fullscreen)} onClick={this.toggleFullscreen}><Icon id={fullscreen ? 'compress' : 'arrows-alt'} fixedWidth /></button>
diff --git a/app/javascript/mastodon/reducers/index.js b/app/javascript/mastodon/reducers/index.js
index 3823bb05e..a8fb69c27 100644
--- a/app/javascript/mastodon/reducers/index.js
+++ b/app/javascript/mastodon/reducers/index.js
@@ -36,6 +36,7 @@ import trends from './trends';
 import missed_updates from './missed_updates';
 import announcements from './announcements';
 import markers from './markers';
+import picture_in_picture from './picture_in_picture';
 
 const reducers = {
   announcements,
@@ -75,6 +76,7 @@ const reducers = {
   trends,
   missed_updates,
   markers,
+  picture_in_picture,
 };
 
 export default combineReducers(reducers);
diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index ed1ba0272..b01db806f 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -9,6 +9,7 @@ import {
   NOTIFICATIONS_LOAD_PENDING,
   NOTIFICATIONS_MOUNT,
   NOTIFICATIONS_UNMOUNT,
+  NOTIFICATIONS_MARK_AS_READ,
 } from '../actions/notifications';
 import {
   ACCOUNT_BLOCK_SUCCESS,
@@ -16,6 +17,13 @@ import {
   FOLLOW_REQUEST_AUTHORIZE_SUCCESS,
   FOLLOW_REQUEST_REJECT_SUCCESS,
 } from '../actions/accounts';
+import {
+  MARKERS_FETCH_SUCCESS,
+} from '../actions/markers';
+import {
+  APP_FOCUS,
+  APP_UNFOCUS,
+} from '../actions/app';
 import { DOMAIN_BLOCK_SUCCESS } from 'mastodon/actions/domain_blocks';
 import { TIMELINE_DELETE, TIMELINE_DISCONNECT } from '../actions/timelines';
 import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
@@ -26,8 +34,11 @@ const initialState = ImmutableMap({
   items: ImmutableList(),
   hasMore: true,
   top: false,
-  mounted: false,
+  mounted: 0,
   unread: 0,
+  lastReadId: '0',
+  readMarkerId: '0',
+  isTabVisible: true,
   isLoading: false,
 });
 
@@ -46,8 +57,10 @@ const normalizeNotification = (state, notification, usePendingItems) => {
     return state.update('pendingItems', list => list.unshift(notificationToMap(notification))).update('unread', unread => unread + 1);
   }
 
-  if (!top) {
+  if (shouldCountUnreadNotifications(state)) {
     state = state.update('unread', unread => unread + 1);
+  } else {
+    state = state.set('lastReadId', notification.id);
   }
 
   return state.update('items', list => {
@@ -60,6 +73,7 @@ const normalizeNotification = (state, notification, usePendingItems) => {
 };
 
 const expandNormalizedNotifications = (state, notifications, next, isLoadingRecent, usePendingItems) => {
+  const lastReadId = state.get('lastReadId');
   let items = ImmutableList();
 
   notifications.forEach((n, i) => {
@@ -87,6 +101,15 @@ const expandNormalizedNotifications = (state, notifications, next, isLoadingRece
       mutable.set('hasMore', false);
     }
 
+    if (shouldCountUnreadNotifications(state)) {
+      mutable.update('unread', unread => unread + items.count(item => compareId(item.get('id'), lastReadId) > 0));
+    } else {
+      const mostRecent = items.find(item => item !== null);
+      if (mostRecent && compareId(lastReadId, mostRecent.get('id')) < 0) {
+        mutable.set('lastReadId', mostRecent.get('id'));
+      }
+    }
+
     mutable.set('isLoading', false);
   });
 };
@@ -96,21 +119,92 @@ const filterNotifications = (state, accountIds, type) => {
   return state.update('items', helper).update('pendingItems', helper);
 };
 
+const clearUnread = (state) => {
+  state = state.set('unread', state.get('pendingItems').size);
+  const lastNotification = state.get('items').find(item => item !== null);
+  return state.set('lastReadId', lastNotification ? lastNotification.get('id') : '0');
+};
+
 const updateTop = (state, top) => {
-  if (top) {
-    state = state.set('unread', state.get('pendingItems').size);
+  state = state.set('top', top);
+
+  if (!shouldCountUnreadNotifications(state)) {
+    state = clearUnread(state);
   }
 
-  return state.set('top', top);
+  return state;
 };
 
 const deleteByStatus = (state, statusId) => {
+  const lastReadId = state.get('lastReadId');
+
+  if (shouldCountUnreadNotifications(state)) {
+    const deletedUnread = state.get('items').filter(item => item !== null && item.get('status') === statusId && compareId(item.get('id'), lastReadId) > 0);
+    state = state.update('unread', unread => unread - deletedUnread.size);
+  }
+
   const helper = list => list.filterNot(item => item !== null && item.get('status') === statusId);
+  const deletedUnread = state.get('pendingItems').filter(item => item !== null && item.get('status') === statusId && compareId(item.get('id'), lastReadId) > 0);
+  state = state.update('unread', unread => unread - deletedUnread.size);
   return state.update('items', helper).update('pendingItems', helper);
 };
 
+const updateMounted = (state) => {
+  state = state.update('mounted', count => count + 1);
+  if (!shouldCountUnreadNotifications(state)) {
+    state = state.set('readMarkerId', state.get('lastReadId'));
+    state = clearUnread(state);
+  }
+  return state;
+};
+
+const updateVisibility = (state, visibility) => {
+  state = state.set('isTabVisible', visibility);
+  if (!shouldCountUnreadNotifications(state)) {
+    state = state.set('readMarkerId', state.get('lastReadId'));
+    state = clearUnread(state);
+  }
+  return state;
+};
+
+const shouldCountUnreadNotifications = (state) => {
+  const isTabVisible   = state.get('isTabVisible');
+  const isOnTop        = state.get('top');
+  const isMounted      = state.get('mounted') > 0;
+  const lastReadId     = state.get('lastReadId');
+  const lastItemReached = !state.get('hasMore') || lastReadId === '0' || (!state.get('items').isEmpty() && compareId(state.get('items').last().get('id'), lastReadId) <= 0);
+
+  return !(isTabVisible && isOnTop && isMounted && lastItemReached);
+};
+
+const recountUnread = (state, last_read_id) => {
+  return state.withMutations(mutable => {
+    if (compareId(last_read_id, mutable.get('lastReadId')) > 0) {
+      mutable.set('lastReadId', last_read_id);
+    }
+
+    if (compareId(last_read_id, mutable.get('readMarkerId')) > 0) {
+      mutable.set('readMarkerId', last_read_id);
+    }
+
+    if (state.get('unread') > 0 || shouldCountUnreadNotifications(state)) {
+      mutable.set('unread', mutable.get('pendingItems').count(item => item !== null) + mutable.get('items').count(item => item && compareId(item.get('id'), last_read_id) > 0));
+    }
+  });
+};
+
 export default function notifications(state = initialState, action) {
   switch(action.type) {
+  case MARKERS_FETCH_SUCCESS:
+    return action.markers.notifications ? recountUnread(state, action.markers.notifications.last_read_id) : state;
+  case NOTIFICATIONS_MOUNT:
+    return updateMounted(state);
+  case NOTIFICATIONS_UNMOUNT:
+    return state.update('mounted', count => count - 1);
+  case APP_FOCUS:
+    return updateVisibility(state, true);
+  case APP_UNFOCUS:
+    return updateVisibility(state, false);
   case NOTIFICATIONS_LOAD_PENDING:
     return state.update('items', list => state.get('pendingItems').concat(list.take(40))).set('pendingItems', ImmutableList()).set('unread', 0);
   case NOTIFICATIONS_EXPAND_REQUEST:
@@ -144,10 +238,9 @@ export default function notifications(state = initialState, action) {
     return action.timeline === 'home' ?
       state.update(action.usePendingItems ? 'pendingItems' : 'items', items => items.first() ? items.unshift(null) : items) :
       state;
-  case NOTIFICATIONS_MOUNT:
-    return state.set('mounted', true);
-  case NOTIFICATIONS_UNMOUNT:
-    return state.set('mounted', false);
+  case NOTIFICATIONS_MARK_AS_READ:
+    const lastNotification = state.get('items').find(item => item !== null);
+    return lastNotification ? recountUnread(state, lastNotification.get('id')) : state;
   default:
     return state;
   }
diff --git a/app/javascript/mastodon/reducers/picture_in_picture.js b/app/javascript/mastodon/reducers/picture_in_picture.js
new file mode 100644
index 000000000..06cd8c5e8
--- /dev/null
+++ b/app/javascript/mastodon/reducers/picture_in_picture.js
@@ -0,0 +1,22 @@
+import { PICTURE_IN_PICTURE_DEPLOY, PICTURE_IN_PICTURE_REMOVE } from 'mastodon/actions/picture_in_picture';
+
+const initialState = {
+  statusId: null,
+  accountId: null,
+  type: null,
+  src: null,
+  muted: false,
+  volume: 0,
+  currentTime: 0,
+};
+
+export default function pictureInPicture(state = initialState, action) {
+  switch(action.type) {
+  case PICTURE_IN_PICTURE_DEPLOY:
+    return { statusId: action.statusId, accountId: action.accountId, type: action.playerType, ...action.props };
+  case PICTURE_IN_PICTURE_REMOVE:
+    return { ...initialState };
+  default:
+    return state;
+  }
+};
diff --git a/app/javascript/styles/contrast/diff.scss b/app/javascript/styles/contrast/diff.scss
index 5a40e7d79..841ed6648 100644
--- a/app/javascript/styles/contrast/diff.scss
+++ b/app/javascript/styles/contrast/diff.scss
@@ -75,3 +75,8 @@
 .public-layout .public-account-header__tabs__tabs .counter.active::after {
   border-bottom: 4px solid $ui-highlight-color;
 }
+
+.compose-form .autosuggest-textarea__textarea::placeholder,
+.compose-form .spoiler-input__input::placeholder {
+  color: $inverted-text-color;
+}
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 4f4507b37..ff4bb3428 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -163,7 +163,8 @@
 }
 
 .icon-button {
-  display: inline-block;
+  display: inline-flex;
+  align-items: center;
   padding: 0;
   color: $action-button-color;
   border: 0;
@@ -245,6 +246,14 @@
       background: rgba($base-overlay-background, 0.9);
     }
   }
+
+  &__counter {
+    display: inline-block;
+    width: 14px;
+    margin-left: 4px;
+    font-size: 12px;
+    font-weight: 500;
+  }
 }
 
 .text-icon-button {
@@ -1139,24 +1148,6 @@
   align-items: center;
   display: flex;
   margin-top: 8px;
-
-  &__counter {
-    display: inline-flex;
-    margin-right: 11px;
-    align-items: center;
-
-    .status__action-bar-button {
-      margin-right: 4px;
-    }
-
-    &__label {
-      display: inline-block;
-      width: 14px;
-      font-size: 12px;
-      font-weight: 500;
-      color: $action-button-color;
-    }
-  }
 }
 
 .status__action-bar-button {
@@ -6502,6 +6493,10 @@ noscript {
         padding: 2px;
       }
 
+      & > .icon-button {
+        margin-right: 8px;
+      }
+
       .button {
         margin: 0 8px;
       }
@@ -7011,3 +7006,119 @@ noscript {
     }
   }
 }
+
+.notification,
+.status__wrapper {
+  position: relative;
+
+  &.unread {
+    &::before {
+      content: "";
+      position: absolute;
+      top: 0;
+      left: 0;
+      pointer-events: 0;
+      width: 100%;
+      height: 100%;
+      border-left: 2px solid $highlight-text-color;
+      pointer-events: none;
+    }
+  }
+}
+
+.picture-in-picture {
+  position: fixed;
+  bottom: 20px;
+  right: 20px;
+  width: 300px;
+
+  &__footer {
+    border-radius: 0 0 4px 4px;
+    background: lighten($ui-base-color, 4%);
+    padding: 10px;
+    padding-top: 12px;
+    display: flex;
+    justify-content: space-between;
+  }
+
+  &__header {
+    border-radius: 4px 4px 0 0;
+    background: lighten($ui-base-color, 4%);
+    padding: 10px;
+    display: flex;
+    justify-content: space-between;
+
+    &__account {
+      display: flex;
+      text-decoration: none;
+    }
+
+    .account__avatar {
+      margin-right: 10px;
+    }
+
+    .display-name {
+      color: $primary-text-color;
+      text-decoration: none;
+
+      strong,
+      span {
+        display: block;
+        text-overflow: ellipsis;
+        overflow: hidden;
+      }
+
+      span {
+        color: $darker-text-color;
+      }
+    }
+  }
+
+  .video-player,
+  .audio-player {
+    border-radius: 0;
+  }
+
+  @media screen and (max-width: 415px) {
+    width: 210px;
+    bottom: 10px;
+    right: 10px;
+
+    &__footer {
+      display: none;
+    }
+
+    .video-player,
+    .audio-player {
+      border-radius: 0 0 4px 4px;
+    }
+  }
+}
+
+.picture-in-picture-placeholder {
+  box-sizing: border-box;
+  border: 2px dashed lighten($ui-base-color, 8%);
+  background: $base-shadow-color;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  margin-top: 10px;
+  font-size: 16px;
+  font-weight: 500;
+  cursor: pointer;
+  color: $darker-text-color;
+
+  i {
+    display: block;
+    font-size: 24px;
+    font-weight: 400;
+    margin-bottom: 10px;
+  }
+
+  &:hover,
+  &:focus,
+  &:active {
+    border-color: lighten($ui-base-color, 12%);
+  }
+}