diff --git a/Gemfile b/Gemfile
index deef23af57..cc48302732 100644
--- a/Gemfile
+++ b/Gemfile
@@ -65,6 +65,7 @@ gem 'nsa', '~> 0.2'
 gem 'oj', '~> 3.8'
 gem 'ostatus2', '~> 2.0'
 gem 'ox', '~> 2.11'
+gem 'parslet'
 gem 'posix-spawn', git: 'https://github.com/rtomayko/posix-spawn', ref: '58465d2e213991f8afb13b984854a49fcdcc980c'
 gem 'pundit', '~> 2.0'
 gem 'premailer-rails'
@@ -92,7 +93,7 @@ gem 'tzinfo-data', '~> 1.2019'
 gem 'webpacker', '~> 4.0'
 gem 'webpush'
 
-gem 'json-ld', '~> 3.0'
+gem 'json-ld', git: 'https://github.com/ruby-rdf/json-ld.git', ref: '345b7a5733308af827e8491d284dbafa9128d7a2'
 gem 'json-ld-preloaded', '~> 3.0'
 gem 'rdf-normalize', '~> 0.3'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index b091612953..d2e74f82e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,6 +5,19 @@ GIT
   specs:
     posix-spawn (0.3.13)
 
+GIT
+  remote: https://github.com/ruby-rdf/json-ld.git
+  revision: 345b7a5733308af827e8491d284dbafa9128d7a2
+  ref: 345b7a5733308af827e8491d284dbafa9128d7a2
+  specs:
+    json-ld (3.0.2)
+      htmlentities (~> 4.3)
+      json-canonicalization (~> 0.1)
+      link_header (~> 0.0, >= 0.0.8)
+      multi_json (~> 1.13)
+      rack (>= 1.6, < 3.0)
+      rdf (~> 3.0, >= 3.0.8)
+
 GIT
   remote: https://github.com/tmm1/http_parser.rb
   revision: 54b17ba8c7d8d20a16dfc65d1775241833219cf2
@@ -299,10 +312,8 @@ GEM
     jaro_winkler (1.5.3)
     jmespath (1.4.0)
     json (2.2.0)
-    json-ld (3.0.2)
-      multi_json (~> 1.12)
-      rdf (>= 2.2.8, < 4.0)
-    json-ld-preloaded (3.0.2)
+    json-canonicalization (0.1.0)
+    json-ld-preloaded (3.0.3)
       json-ld (~> 3.0)
       multi_json (~> 1.12)
       rdf (~> 3.0)
@@ -406,6 +417,7 @@ GEM
       parallel
     parser (2.6.3.0)
       ast (~> 2.4.0)
+    parslet (1.8.2)
     pastel (0.7.2)
       equatable (~> 0.5.0)
       tty-color (~> 0.4.0)
@@ -480,7 +492,7 @@ GEM
       thor (>= 0.19.0, < 2.0)
     rainbow (3.0.0)
     rake (12.3.2)
-    rdf (3.0.9)
+    rdf (3.0.12)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
     rdf-normalize (0.3.3)
@@ -703,7 +715,7 @@ DEPENDENCIES
   i18n-tasks (~> 0.9)
   idn-ruby
   iso-639
-  json-ld (~> 3.0)
+  json-ld!
   json-ld-preloaded (~> 3.0)
   kaminari (~> 1.1)
   letter_opener (~> 1.7)
@@ -728,6 +740,7 @@ DEPENDENCIES
   paperclip (~> 6.0)
   paperclip-av-transcoder (~> 0.6)
   parallel_tests (~> 2.29)
+  parslet
   pg (~> 1.1)
   pghero (~> 2.2)
   pkg-config (~> 1.3)
diff --git a/app/controllers/invites_controller.rb b/app/controllers/invites_controller.rb
index 52cddc4044..639002964e 100644
--- a/app/controllers/invites_controller.rb
+++ b/app/controllers/invites_controller.rb
@@ -44,7 +44,7 @@ class InvitesController < ApplicationController
   end
 
   def invites
-    Invite.where(user: current_user).order(id: :desc)
+    current_user.invites.order(id: :desc)
   end
 
   def resource_params
diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb
index 83a5b2462e..1c473efa3f 100644
--- a/app/helpers/jsonld_helper.rb
+++ b/app/helpers/jsonld_helper.rb
@@ -130,7 +130,7 @@ module JsonLdHelper
       end
     end
 
-    doc = JSON::LD::API::RemoteDocument.new(url, json)
+    doc = JSON::LD::API::RemoteDocument.new(json, documentUrl: url)
 
     block_given? ? yield(doc) : doc
   end
diff --git a/app/javascript/mastodon/actions/compose.js b/app/javascript/mastodon/actions/compose.js
index fbf97d3747..cd9955505f 100644
--- a/app/javascript/mastodon/actions/compose.js
+++ b/app/javascript/mastodon/actions/compose.js
@@ -11,7 +11,7 @@ import { showAlertForError } from './alerts';
 import { showAlert } from './alerts';
 import { defineMessages } from 'react-intl';
 
-let cancelFetchComposeSuggestionsAccounts;
+let cancelFetchComposeSuggestionsAccounts, cancelFetchComposeSuggestionsTags;
 
 export const COMPOSE_CHANGE          = 'COMPOSE_CHANGE';
 export const COMPOSE_SUBMIT_REQUEST  = 'COMPOSE_SUBMIT_REQUEST';
@@ -325,10 +325,12 @@ const fetchComposeSuggestionsAccounts = throttle((dispatch, getState, token) =>
   if (cancelFetchComposeSuggestionsAccounts) {
     cancelFetchComposeSuggestionsAccounts();
   }
+
   api(getState).get('/api/v1/accounts/search', {
     cancelToken: new CancelToken(cancel => {
       cancelFetchComposeSuggestionsAccounts = cancel;
     }),
+
     params: {
       q: token.slice(1),
       resolve: false,
@@ -349,9 +351,30 @@ const fetchComposeSuggestionsEmojis = (dispatch, getState, token) => {
   dispatch(readyComposeSuggestionsEmojis(token, results));
 };
 
-const fetchComposeSuggestionsTags = (dispatch, getState, token) => {
-  dispatch(updateSuggestionTags(token));
-};
+const fetchComposeSuggestionsTags = throttle((dispatch, getState, token) => {
+  if (cancelFetchComposeSuggestionsTags) {
+    cancelFetchComposeSuggestionsTags();
+  }
+
+  api(getState).get('/api/v2/search', {
+    cancelToken: new CancelToken(cancel => {
+      cancelFetchComposeSuggestionsTags = cancel;
+    }),
+
+    params: {
+      type: 'hashtags',
+      q: token.slice(1),
+      resolve: false,
+      limit: 4,
+    },
+  }).then(({ data }) => {
+    dispatch(readyComposeSuggestionsTags(token, data.hashtags));
+  }).catch(error => {
+    if (!isCancel(error)) {
+      dispatch(showAlertForError(error));
+    }
+  });
+}, 200, { leading: true, trailing: true });
 
 export function fetchComposeSuggestions(token) {
   return (dispatch, getState) => {
@@ -385,6 +408,12 @@ export function readyComposeSuggestionsAccounts(token, accounts) {
   };
 };
 
+export const readyComposeSuggestionsTags = (token, tags) => ({
+  type: COMPOSE_SUGGESTIONS_READY,
+  token,
+  tags,
+});
+
 export function selectComposeSuggestion(position, token, suggestion, path) {
   return (dispatch, getState) => {
     let completion, startPosition;
@@ -394,8 +423,8 @@ export function selectComposeSuggestion(position, token, suggestion, path) {
       startPosition = position - 1;
 
       dispatch(useEmoji(suggestion));
-    } else if (suggestion[0] === '#') {
-      completion    = suggestion;
+    } else if (typeof suggestion === 'object' && suggestion.name) {
+      completion    = `#${suggestion.name}`;
       startPosition = position - 1;
     } else {
       completion    = getState().getIn(['accounts', suggestion, 'acct']);
diff --git a/app/javascript/mastodon/actions/domain_blocks.js b/app/javascript/mastodon/actions/domain_blocks.js
index 0445a5e10c..34a33a6546 100644
--- a/app/javascript/mastodon/actions/domain_blocks.js
+++ b/app/javascript/mastodon/actions/domain_blocks.js
@@ -23,6 +23,7 @@ export function blockDomain(domain) {
     api(getState).post('/api/v1/domain_blocks', { domain }).then(() => {
       const at_domain = '@' + domain;
       const accounts = getState().get('accounts').filter(item => item.get('acct').endsWith(at_domain)).valueSeq().map(item => item.get('id'));
+
       dispatch(blockDomainSuccess(domain, accounts));
     }).catch(err => {
       dispatch(blockDomainFail(domain, err));
diff --git a/app/javascript/mastodon/actions/search.js b/app/javascript/mastodon/actions/search.js
index 0974fdd15e..a178faeadd 100644
--- a/app/javascript/mastodon/actions/search.js
+++ b/app/javascript/mastodon/actions/search.js
@@ -10,6 +10,10 @@ export const SEARCH_FETCH_REQUEST = 'SEARCH_FETCH_REQUEST';
 export const SEARCH_FETCH_SUCCESS = 'SEARCH_FETCH_SUCCESS';
 export const SEARCH_FETCH_FAIL    = 'SEARCH_FETCH_FAIL';
 
+export const SEARCH_EXPAND_REQUEST = 'SEARCH_EXPAND_REQUEST';
+export const SEARCH_EXPAND_SUCCESS = 'SEARCH_EXPAND_SUCCESS';
+export const SEARCH_EXPAND_FAIL    = 'SEARCH_EXPAND_FAIL';
+
 export function changeSearch(value) {
   return {
     type: SEARCH_CHANGE,
@@ -77,8 +81,50 @@ export function fetchSearchFail(error) {
   };
 };
 
-export function showSearch() {
-  return {
-    type: SEARCH_SHOW,
-  };
+export const expandSearch = type => (dispatch, getState) => {
+  const value  = getState().getIn(['search', 'value']);
+  const offset = getState().getIn(['search', 'results', type]).size;
+
+  dispatch(expandSearchRequest());
+
+  api(getState).get('/api/v2/search', {
+    params: {
+      q: value,
+      type,
+      offset,
+    },
+  }).then(({ data }) => {
+    if (data.accounts) {
+      dispatch(importFetchedAccounts(data.accounts));
+    }
+
+    if (data.statuses) {
+      dispatch(importFetchedStatuses(data.statuses));
+    }
+
+    dispatch(expandSearchSuccess(data, value, type));
+    dispatch(fetchRelationships(data.accounts.map(item => item.id)));
+  }).catch(error => {
+    dispatch(expandSearchFail(error));
+  });
 };
+
+export const expandSearchRequest = () => ({
+  type: SEARCH_EXPAND_REQUEST,
+});
+
+export const expandSearchSuccess = (results, searchTerm, searchType) => ({
+  type: SEARCH_EXPAND_SUCCESS,
+  results,
+  searchTerm,
+  searchType,
+});
+
+export const expandSearchFail = error => ({
+  type: SEARCH_EXPAND_FAIL,
+  error,
+});
+
+export const showSearch = () => ({
+  type: SEARCH_SHOW,
+});
diff --git a/app/javascript/mastodon/components/autosuggest_hashtag.js b/app/javascript/mastodon/components/autosuggest_hashtag.js
new file mode 100644
index 0000000000..eabb8b1785
--- /dev/null
+++ b/app/javascript/mastodon/components/autosuggest_hashtag.js
@@ -0,0 +1,28 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { shortNumberFormat } from 'mastodon/utils/numbers';
+import { FormattedMessage } from 'react-intl';
+
+export default class AutosuggestHashtag extends React.PureComponent {
+
+  static propTypes = {
+    tag: PropTypes.shape({
+      name: PropTypes.string.isRequired,
+      url: PropTypes.string,
+      history: PropTypes.array.isRequired,
+    }).isRequired,
+  };
+
+  render () {
+    const { tag } = this.props;
+    const weeklyUses = shortNumberFormat(tag.history.reduce((total, day) => total + (day.uses * 1), 0));
+
+    return (
+      <div className='autosuggest-hashtag'>
+        <div className='autosuggest-hashtag__name'>#<strong>{tag.name}</strong></div>
+        <div className='autosuggest-hashtag__uses'><FormattedMessage id='autosuggest_hashtag.per_week' defaultMessage='{count} per week' values={{ count: weeklyUses }} /></div>
+      </div>
+    );
+  }
+
+}
diff --git a/app/javascript/mastodon/components/autosuggest_input.js b/app/javascript/mastodon/components/autosuggest_input.js
index c7d965b53a..0df8bf64e1 100644
--- a/app/javascript/mastodon/components/autosuggest_input.js
+++ b/app/javascript/mastodon/components/autosuggest_input.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container';
 import AutosuggestEmoji from './autosuggest_emoji';
+import AutosuggestHashtag from './autosuggest_hashtag';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import PropTypes from 'prop-types';
 import { isRtl } from '../rtl';
@@ -167,12 +168,12 @@ export default class AutosuggestInput extends ImmutablePureComponent {
     const { selectedSuggestion } = this.state;
     let inner, key;
 
-    if (typeof suggestion === 'object') {
+    if (typeof suggestion === 'object' && suggestion.shortcode) {
       inner = <AutosuggestEmoji emoji={suggestion} />;
       key   = suggestion.id;
-    } else if (suggestion[0] === '#') {
-      inner = suggestion;
-      key   = suggestion;
+    } else if (typeof suggestion === 'object' && suggestion.name) {
+      inner = <AutosuggestHashtag tag={suggestion} />;
+      key   = suggestion.name;
     } else {
       inner = <AutosuggestAccountContainer id={suggestion} />;
       key   = suggestion;
diff --git a/app/javascript/mastodon/components/autosuggest_textarea.js b/app/javascript/mastodon/components/autosuggest_textarea.js
index b070fe3e51..2bd06d28a9 100644
--- a/app/javascript/mastodon/components/autosuggest_textarea.js
+++ b/app/javascript/mastodon/components/autosuggest_textarea.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import AutosuggestAccountContainer from '../features/compose/containers/autosuggest_account_container';
 import AutosuggestEmoji from './autosuggest_emoji';
+import AutosuggestHashtag from './autosuggest_hashtag';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import PropTypes from 'prop-types';
 import { isRtl } from '../rtl';
@@ -173,12 +174,12 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
     const { selectedSuggestion } = this.state;
     let inner, key;
 
-    if (typeof suggestion === 'object') {
+    if (typeof suggestion === 'object' && suggestion.shortcode) {
       inner = <AutosuggestEmoji emoji={suggestion} />;
       key   = suggestion.id;
-    } else if (suggestion[0] === '#') {
-      inner = suggestion;
-      key   = suggestion;
+    } else if (typeof suggestion === 'object' && suggestion.name) {
+      inner = <AutosuggestHashtag tag={suggestion} />;
+      key   = suggestion.name;
     } else {
       inner = <AutosuggestAccountContainer id={suggestion} />;
       key   = suggestion;
diff --git a/app/javascript/mastodon/components/status_content.js b/app/javascript/mastodon/components/status_content.js
index 8a05415afd..549de95fc1 100644
--- a/app/javascript/mastodon/components/status_content.js
+++ b/app/javascript/mastodon/components/status_content.js
@@ -55,6 +55,7 @@ export default class StatusContent extends React.PureComponent {
         link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
       } else {
         link.setAttribute('title', link.href);
+        link.classList.add('unhandled-link');
       }
 
       link.setAttribute('target', '_blank');
@@ -233,46 +234,23 @@ export default class StatusContent extends React.PureComponent {
         </div>
       );
     } else if (this.props.onClick) {
-      const output = [
-        <div
-          ref={this.setRef}
-          tabIndex='0'
-          key='content'
-          className={classNames}
-          style={directionStyle}
-          dangerouslySetInnerHTML={content}
-          lang={status.get('language')}
-          onMouseDown={this.handleMouseDown}
-          onMouseUp={this.handleMouseUp}
-        />,
-      ];
+      return (
+        <div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle} onMouseDown={this.handleMouseDown} onMouseUp={this.handleMouseUp}>
+          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
 
-      if (this.state.collapsed) {
-        output.push(readMoreButton);
-      }
+          {!!this.state.collapsed && readMoreButton}
 
-      if (status.get('poll')) {
-        output.push(<PollContainer pollId={status.get('poll')} />);
-      }
-
-      return output;
+          {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
+        </div>
+      );
     } else {
-      const output = [
-        <div
-          tabIndex='0'
-          ref={this.setRef}
-          className='status__content'
-          style={directionStyle}
-          dangerouslySetInnerHTML={content}
-          lang={status.get('language')}
-        />,
-      ];
+      return (
+        <div className={classNames} ref={this.setRef} tabIndex='0' style={directionStyle}>
+          <div className='status__content__text status__content__text--visible' style={directionStyle} dangerouslySetInnerHTML={content} lang={status.get('language')} />
 
-      if (status.get('poll')) {
-        output.push(<PollContainer pollId={status.get('poll')} />);
-      }
-
-      return output;
+          {!!status.get('poll') && <PollContainer pollId={status.get('poll')} />}
+        </div>
+      );
     }
   }
 
diff --git a/app/javascript/mastodon/features/compose/components/search_results.js b/app/javascript/mastodon/features/compose/components/search_results.js
index 2f338dd246..4b4cdff743 100644
--- a/app/javascript/mastodon/features/compose/components/search_results.js
+++ b/app/javascript/mastodon/features/compose/components/search_results.js
@@ -8,6 +8,7 @@ import ImmutablePureComponent from 'react-immutable-pure-component';
 import Hashtag from '../../../components/hashtag';
 import Icon from 'mastodon/components/icon';
 import { searchEnabled } from '../../../initial_state';
+import LoadMore from 'mastodon/components/load_more';
 
 const messages = defineMessages({
   dismissSuggestion: { id: 'suggestions.dismiss', defaultMessage: 'Dismiss suggestion' },
@@ -20,15 +21,24 @@ class SearchResults extends ImmutablePureComponent {
     results: ImmutablePropTypes.map.isRequired,
     suggestions: ImmutablePropTypes.list.isRequired,
     fetchSuggestions: PropTypes.func.isRequired,
+    expandSearch: PropTypes.func.isRequired,
     dismissSuggestion: PropTypes.func.isRequired,
     searchTerm: PropTypes.string,
     intl: PropTypes.object.isRequired,
   };
 
   componentDidMount () {
-    this.props.fetchSuggestions();
+    if (this.props.searchTerm === '') {
+      this.props.fetchSuggestions();
+    }
   }
 
+  handleLoadMoreAccounts = () => this.props.expandSearch('accounts');
+
+  handleLoadMoreStatuses = () => this.props.expandSearch('statuses');
+
+  handleLoadMoreHashtags = () => this.props.expandSearch('hashtags');
+
   render () {
     const { intl, results, suggestions, dismissSuggestion, searchTerm } = this.props;
 
@@ -65,6 +75,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='users' fixedWidth /><FormattedMessage id='search_results.accounts' defaultMessage='People' /></h5>
 
           {results.get('accounts').map(accountId => <AccountContainer key={accountId} id={accountId} />)}
+
+          {results.get('accounts').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreAccounts} />}
         </div>
       );
     }
@@ -76,6 +88,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='quote-right' fixedWidth /><FormattedMessage id='search_results.statuses' defaultMessage='Toots' /></h5>
 
           {results.get('statuses').map(statusId => <StatusContainer key={statusId} id={statusId} />)}
+
+          {results.get('statuses').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreStatuses} />}
         </div>
       );
     } else if(results.get('statuses') && results.get('statuses').size === 0 && !searchEnabled && !(searchTerm.startsWith('@') || searchTerm.startsWith('#') || searchTerm.includes(' '))) {
@@ -97,6 +111,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='hashtag' fixedWidth /><FormattedMessage id='search_results.hashtags' defaultMessage='Hashtags' /></h5>
 
           {results.get('hashtags').map(hashtag => <Hashtag key={hashtag.get('name')} hashtag={hashtag} />)}
+
+          {results.get('hashtags').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreHashtags} />}
         </div>
       );
     }
diff --git a/app/javascript/mastodon/features/compose/containers/search_results_container.js b/app/javascript/mastodon/features/compose/containers/search_results_container.js
index e4d5f34207..1f714ff834 100644
--- a/app/javascript/mastodon/features/compose/containers/search_results_container.js
+++ b/app/javascript/mastodon/features/compose/containers/search_results_container.js
@@ -1,6 +1,7 @@
 import { connect } from 'react-redux';
 import SearchResults from '../components/search_results';
-import { fetchSuggestions, dismissSuggestion } from '../../../actions/suggestions';
+import { fetchSuggestions, dismissSuggestion } from 'mastodon/actions/suggestions';
+import { expandSearch } from 'mastodon/actions/search';
 
 const mapStateToProps = state => ({
   results: state.getIn(['search', 'results']),
@@ -10,6 +11,7 @@ const mapStateToProps = state => ({
 
 const mapDispatchToProps = dispatch => ({
   fetchSuggestions: () => dispatch(fetchSuggestions()),
+  expandSearch: type => dispatch(expandSearch(type)),
   dismissSuggestion: account => dispatch(dismissSuggestion(account.get('id'))),
 });
 
diff --git a/app/javascript/mastodon/reducers/compose.js b/app/javascript/mastodon/reducers/compose.js
index fae7522b26..fc6d5f30f1 100644
--- a/app/javascript/mastodon/reducers/compose.js
+++ b/app/javascript/mastodon/reducers/compose.js
@@ -17,7 +17,6 @@ import {
   COMPOSE_SUGGESTIONS_CLEAR,
   COMPOSE_SUGGESTIONS_READY,
   COMPOSE_SUGGESTION_SELECT,
-  COMPOSE_SUGGESTION_TAGS_UPDATE,
   COMPOSE_TAG_HISTORY_UPDATE,
   COMPOSE_SENSITIVITY_CHANGE,
   COMPOSE_SPOILERNESS_CHANGE,
@@ -144,15 +143,20 @@ const insertSuggestion = (state, position, token, completion, path) => {
   });
 };
 
-const updateSuggestionTags = (state, token) => {
-  const prefix = token.slice(1);
+const sortHashtagsByUse = (state, tags) => {
+  const personalHistory = state.get('tagHistory');
 
-  return state.merge({
-    suggestions: state.get('tagHistory')
-      .filter(tag => tag.toLowerCase().startsWith(prefix.toLowerCase()))
-      .slice(0, 4)
-      .map(tag => '#' + tag),
-    suggestion_token: token,
+  return tags.sort((a, b) => {
+    const usedA = personalHistory.includes(a.name);
+    const usedB = personalHistory.includes(b.name);
+
+    if (usedA === usedB) {
+      return 0;
+    } else if (usedA && !usedB) {
+      return 1;
+    } else {
+      return -1;
+    }
   });
 };
 
@@ -201,6 +205,16 @@ const expiresInFromExpiresAt = expires_at => {
   return [300, 1800, 3600, 21600, 86400, 259200, 604800].find(expires_in => expires_in >= delta) || 24 * 3600;
 };
 
+const normalizeSuggestions = (state, { accounts, emojis, tags }) => {
+  if (accounts) {
+    return accounts.map(item => item.id);
+  } else if (emojis) {
+    return emojis;
+  } else {
+    return sortHashtagsByUse(state, tags);
+  }
+};
+
 export default function compose(state = initialState, action) {
   switch(action.type) {
   case STORE_HYDRATE:
@@ -311,11 +325,9 @@ export default function compose(state = initialState, action) {
   case COMPOSE_SUGGESTIONS_CLEAR:
     return state.update('suggestions', ImmutableList(), list => list.clear()).set('suggestion_token', null);
   case COMPOSE_SUGGESTIONS_READY:
-    return state.set('suggestions', ImmutableList(action.accounts ? action.accounts.map(item => item.id) : action.emojis)).set('suggestion_token', action.token);
+    return state.set('suggestions', ImmutableList(normalizeSuggestions(state, action))).set('suggestion_token', action.token);
   case COMPOSE_SUGGESTION_SELECT:
     return insertSuggestion(state, action.position, action.token, action.completion, action.path);
-  case COMPOSE_SUGGESTION_TAGS_UPDATE:
-    return updateSuggestionTags(state, action.token);
   case COMPOSE_TAG_HISTORY_UPDATE:
     return state.set('tagHistory', fromJS(action.tags));
   case TIMELINE_DELETE:
diff --git a/app/javascript/mastodon/reducers/conversations.js b/app/javascript/mastodon/reducers/conversations.js
index 9564bffcd2..3906582392 100644
--- a/app/javascript/mastodon/reducers/conversations.js
+++ b/app/javascript/mastodon/reducers/conversations.js
@@ -8,6 +8,8 @@ import {
   CONVERSATIONS_UPDATE,
   CONVERSATIONS_READ,
 } from '../actions/conversations';
+import { ACCOUNT_BLOCK_SUCCESS, ACCOUNT_MUTE_SUCCESS } from 'mastodon/actions/accounts';
+import { DOMAIN_BLOCK_SUCCESS } from 'mastodon/actions/domain_blocks';
 import compareId from '../compare_id';
 
 const initialState = ImmutableMap({
@@ -74,6 +76,10 @@ const expandNormalizedConversations = (state, conversations, next, isLoadingRece
   });
 };
 
+const filterConversations = (state, accountIds) => {
+  return state.update('items', list => list.filterNot(item => item.get('accounts').some(accountId => accountIds.includes(accountId))));
+};
+
 export default function conversations(state = initialState, action) {
   switch (action.type) {
   case CONVERSATIONS_FETCH_REQUEST:
@@ -96,6 +102,11 @@ export default function conversations(state = initialState, action) {
 
       return item;
     }));
+  case ACCOUNT_BLOCK_SUCCESS:
+  case ACCOUNT_MUTE_SUCCESS:
+    return filterConversations(state, [action.relationship.id]);
+  case DOMAIN_BLOCK_SUCCESS:
+    return filterConversations(state, action.accounts);
   default:
     return state;
   }
diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index e94a4946b8..049c70cb41 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -12,6 +12,7 @@ import {
   ACCOUNT_BLOCK_SUCCESS,
   ACCOUNT_MUTE_SUCCESS,
 } from '../actions/accounts';
+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';
 import compareId from '../compare_id';
@@ -83,8 +84,8 @@ const expandNormalizedNotifications = (state, notifications, next, usePendingIte
   });
 };
 
-const filterNotifications = (state, relationship) => {
-  const helper = list => list.filterNot(item => item !== null && item.get('account') === relationship.id);
+const filterNotifications = (state, accountIds) => {
+  const helper = list => list.filterNot(item => item !== null && accountIds.includes(item.get('account')));
   return state.update('items', helper).update('pendingItems', helper);
 };
 
@@ -118,9 +119,11 @@ export default function notifications(state = initialState, action) {
   case NOTIFICATIONS_EXPAND_SUCCESS:
     return expandNormalizedNotifications(state, action.notifications, action.next, action.usePendingItems);
   case ACCOUNT_BLOCK_SUCCESS:
-    return filterNotifications(state, action.relationship);
+    return filterNotifications(state, [action.relationship.id]);
   case ACCOUNT_MUTE_SUCCESS:
-    return action.relationship.muting_notifications ? filterNotifications(state, action.relationship) : state;
+    return action.relationship.muting_notifications ? filterNotifications(state, [action.relationship.id]) : state;
+  case DOMAIN_BLOCK_SUCCESS:
+    return filterNotifications(state, action.accounts);
   case NOTIFICATIONS_CLEAR:
     return state.set('items', ImmutableList()).set('pendingItems', ImmutableList()).set('hasMore', false);
   case TIMELINE_DELETE:
diff --git a/app/javascript/mastodon/reducers/search.js b/app/javascript/mastodon/reducers/search.js
index 77b7f588c5..f437ff2171 100644
--- a/app/javascript/mastodon/reducers/search.js
+++ b/app/javascript/mastodon/reducers/search.js
@@ -3,6 +3,7 @@ import {
   SEARCH_CLEAR,
   SEARCH_FETCH_SUCCESS,
   SEARCH_SHOW,
+  SEARCH_EXPAND_SUCCESS,
 } from '../actions/search';
 import {
   COMPOSE_MENTION,
@@ -42,6 +43,8 @@ export default function search(state = initialState, action) {
       statuses: ImmutableList(action.results.statuses.map(item => item.id)),
       hashtags: fromJS(action.results.hashtags),
     })).set('submitted', true).set('searchTerm', action.searchTerm);
+  case SEARCH_EXPAND_SUCCESS:
+    return state.updateIn(['results', action.searchType], list => list.concat(action.results[action.searchType].map(item => item.id)));
   default:
     return state;
   }
diff --git a/app/javascript/mastodon/reducers/suggestions.js b/app/javascript/mastodon/reducers/suggestions.js
index 9f4b89d586..834be728f1 100644
--- a/app/javascript/mastodon/reducers/suggestions.js
+++ b/app/javascript/mastodon/reducers/suggestions.js
@@ -4,6 +4,8 @@ import {
   SUGGESTIONS_FETCH_FAIL,
   SUGGESTIONS_DISMISS,
 } from '../actions/suggestions';
+import { ACCOUNT_BLOCK_SUCCESS, ACCOUNT_MUTE_SUCCESS } from 'mastodon/actions/accounts';
+import { DOMAIN_BLOCK_SUCCESS } from 'mastodon/actions/domain_blocks';
 import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
 
 const initialState = ImmutableMap({
@@ -24,6 +26,11 @@ export default function suggestionsReducer(state = initialState, action) {
     return state.set('isLoading', false);
   case SUGGESTIONS_DISMISS:
     return state.update('items', list => list.filterNot(id => id === action.id));
+  case ACCOUNT_BLOCK_SUCCESS:
+  case ACCOUNT_MUTE_SUCCESS:
+    return state.update('items', list => list.filterNot(id => id === action.relationship.id));
+  case DOMAIN_BLOCK_SUCCESS:
+    return state.update('items', list => list.filterNot(id => action.accounts.includes(id)));
   default:
     return state;
   }
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 4d0adc2293..1853cd2e5a 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -445,7 +445,8 @@
   }
 
   .autosuggest-account,
-  .autosuggest-emoji {
+  .autosuggest-emoji,
+  .autosuggest-hashtag {
     display: flex;
     flex-direction: row;
     align-items: center;
@@ -454,6 +455,14 @@
     font-size: 14px;
   }
 
+  .autosuggest-hashtag {
+    justify-content: space-between;
+
+    strong {
+      font-weight: 500;
+    }
+  }
+
   .autosuggest-account-icon,
   .autosuggest-emoji img {
     display: block;
@@ -753,6 +762,10 @@
     }
   }
 
+  a.unhandled-link {
+    color: lighten($ui-highlight-color, 8%);
+  }
+
   .status__content__spoiler-link {
     background: $action-button-color;
 
@@ -1936,6 +1949,9 @@ a.account__display-name {
   background: lighten($ui-base-color, 8%);
   flex: 0 0 auto;
   overflow-y: auto;
+  position: sticky;
+  top: 0;
+  z-index: 3;
 }
 
 .tabs-bar__link {
@@ -4006,8 +4022,9 @@ a.status-card.compact:hover {
 }
 
 .search-results__info {
-  padding: 10px;
-  color: $secondary-text-color;
+  padding: 20px;
+  color: $darker-text-color;
+  text-align: center;
 }
 
 .modal-root {
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index 56c24680a7..000b77df5f 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -148,12 +148,9 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
   def process_hashtag(tag)
     return if tag['name'].blank?
 
-    hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
-    hashtag = Tag.where(name: hashtag).first_or_create!(name: hashtag)
-
-    return if @tags.include?(hashtag)
-
-    @tags << hashtag
+    Tag.find_or_create_by_names(tag['name']) do |hashtag|
+      @tags << hashtag unless @tags.include?(hashtag)
+    end
   rescue ActiveRecord::RecordInvalid
     nil
   end
diff --git a/app/lib/search_query_parser.rb b/app/lib/search_query_parser.rb
new file mode 100644
index 0000000000..405ad15b89
--- /dev/null
+++ b/app/lib/search_query_parser.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class SearchQueryParser < Parslet::Parser
+  rule(:term)     { match('[^\s":]').repeat(1).as(:term) }
+  rule(:quote)    { str('"') }
+  rule(:colon)    { str(':') }
+  rule(:space)    { match('\s').repeat(1) }
+  rule(:operator) { (str('+') | str('-')).as(:operator) }
+  rule(:prefix)   { (term >> colon).as(:prefix) }
+  rule(:phrase)   { (quote >> (term >> space.maybe).repeat >> quote).as(:phrase) }
+  rule(:clause)   { (prefix.maybe >> operator.maybe >> (phrase | term)).as(:clause) }
+  rule(:query)    { (clause >> space.maybe).repeat.as(:query) }
+  root(:query)
+end
diff --git a/app/lib/search_query_transformer.rb b/app/lib/search_query_transformer.rb
new file mode 100644
index 0000000000..2c4144790b
--- /dev/null
+++ b/app/lib/search_query_transformer.rb
@@ -0,0 +1,86 @@
+# frozen_string_literal: true
+
+class SearchQueryTransformer < Parslet::Transform
+  class Query
+    attr_reader :should_clauses, :must_not_clauses, :must_clauses
+
+    def initialize(clauses)
+      grouped = clauses.chunk(&:operator).to_h
+      @should_clauses = grouped.fetch(:should, [])
+      @must_not_clauses = grouped.fetch(:must_not, [])
+      @must_clauses = grouped.fetch(:must, [])
+    end
+
+    def apply(search)
+      should_clauses.each { |clause| search = search.query.should(clause_to_query(clause)) }
+      must_clauses.each { |clause| search = search.query.must(clause_to_query(clause)) }
+      must_not_clauses.each { |clause| search = search.query.must_not(clause_to_query(clause)) }
+      search.query.minimum_should_match(1)
+    end
+
+    private
+
+    def clause_to_query(clause)
+      case clause
+      when TermClause
+        { multi_match: { type: 'most_fields', query: clause.term, fields: ['text', 'text.stemmed'] } }
+      when PhraseClause
+        { match_phrase: { text: { query: clause.phrase } } }
+      else
+        raise "Unexpected clause type: #{clause}"
+      end
+    end
+  end
+
+  class Operator
+    class << self
+      def symbol(str)
+        case str
+        when '+'
+          :must
+        when '-'
+          :must_not
+        when nil
+          :should
+        else
+          raise "Unknown operator: #{str}"
+        end
+      end
+    end
+  end
+
+  class TermClause
+    attr_reader :prefix, :operator, :term
+
+    def initialize(prefix, operator, term)
+      @prefix = prefix
+      @operator = Operator.symbol(operator)
+      @term = term
+    end
+  end
+
+  class PhraseClause
+    attr_reader :prefix, :operator, :phrase
+
+    def initialize(prefix, operator, phrase)
+      @prefix = prefix
+      @operator = Operator.symbol(operator)
+      @phrase = phrase
+    end
+  end
+
+  rule(clause: subtree(:clause)) do
+    prefix   = clause[:prefix][:term].to_s if clause[:prefix]
+    operator = clause[:operator]&.to_s
+
+    if clause[:term]
+      TermClause.new(prefix, operator, clause[:term].to_s)
+    elsif clause[:phrase]
+      PhraseClause.new(prefix, operator, clause[:phrase].map { |p| p[:term].to_s }.join(' '))
+    else
+      raise "Unexpected clause type: #{clause}"
+    end
+  end
+
+  rule(query: sequence(:clauses)) { Query.new(clauses) }
+end
diff --git a/app/models/invite.rb b/app/models/invite.rb
index fe23224625..02ab8e0b21 100644
--- a/app/models/invite.rb
+++ b/app/models/invite.rb
@@ -17,7 +17,7 @@
 class Invite < ApplicationRecord
   include Expireable
 
-  belongs_to :user
+  belongs_to :user, inverse_of: :invites
   has_many :users, inverse_of: :invite
 
   scope :available, -> { where(expires_at: nil).or(where('expires_at >= ?', Time.now.utc)) }
@@ -25,7 +25,7 @@ class Invite < ApplicationRecord
   before_validation :set_code
 
   def valid_for_use?
-    (max_uses.nil? || uses < max_uses) && !expired?
+    (max_uses.nil? || uses < max_uses) && !expired? && !(user.nil? || user.disabled?)
   end
 
   private
diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index 189d80e77a..be762889cf 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -113,7 +113,7 @@ class MediaAttachment < ApplicationRecord
   has_attached_file :file,
                     styles: ->(f) { file_styles f },
                     processors: ->(f) { file_processors f },
-                    convert_options: { all: '-quality 90 -strip' }
+                    convert_options: { all: '-quality 90 -strip +set modify-date +set create-date' }
 
   validates_attachment_content_type :file, content_type: IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
   validates_attachment_size :file, less_than: IMAGE_LIMIT, unless: :larger_media_format?
diff --git a/app/models/tag.rb b/app/models/tag.rb
index b371d59c1b..972242064b 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -20,7 +20,7 @@ class Tag < ApplicationRecord
   HASHTAG_NAME_RE = '([[:word:]_][[:word:]_·]*[[:alpha:]_·][[:word:]_·]*[[:word:]_])|([[:word:]_]*[[:alpha:]][[:word:]_]*)'
   HASHTAG_RE = /(?:^|[^\/\)\w])#(#{HASHTAG_NAME_RE})/i
 
-  validates :name, presence: true, uniqueness: true, format: { with: /\A(#{HASHTAG_NAME_RE})\z/i }
+  validates :name, presence: true, format: { with: /\A(#{HASHTAG_NAME_RE})\z/i }
 
   scope :discoverable, -> { joins(:account_tag_stat).where(AccountTagStat.arel_table[:accounts_count].gt(0)).where(account_tag_stats: { hidden: false }).order(Arel.sql('account_tag_stats.accounts_count desc')) }
   scope :hidden, -> { where(account_tag_stats: { hidden: true }) }
@@ -64,22 +64,48 @@ class Tag < ApplicationRecord
   end
 
   class << self
-    def search_for(term, limit = 5, offset = 0)
-      pattern = sanitize_sql_like(term.strip) + '%'
+    def find_or_create_by_names(name_or_names)
+      Array(name_or_names).map(&method(:normalize)).uniq.map do |normalized_name|
+        tag = matching_name(normalized_name).first || create(name: normalized_name)
 
-      Tag.where('lower(name) like lower(?)', pattern)
+        yield tag if block_given?
+
+        tag
+      end
+    end
+
+    def search_for(term, limit = 5, offset = 0)
+      pattern = sanitize_sql_like(normalize(term.strip)) + '%'
+
+      Tag.where(arel_table[:name].lower.matches(pattern.downcase))
          .order(:name)
          .limit(limit)
          .offset(offset)
     end
 
     def find_normalized(name)
-      find_by(name: name.mb_chars.downcase.to_s)
+      matching_name(name).first
     end
 
     def find_normalized!(name)
       find_normalized(name) || raise(ActiveRecord::RecordNotFound)
     end
+
+    def matching_name(name_or_names)
+      names = Array(name_or_names).map { |name| normalize(name).downcase }
+
+      if names.size == 1
+        where(arel_table[:name].lower.eq(names.first))
+      else
+        where(arel_table[:name].lower.in(names))
+      end
+    end
+
+    private
+
+    def normalize(str)
+      str.gsub(/\A#/, '').mb_chars.to_s
+    end
   end
 
   private
diff --git a/app/models/user.rb b/app/models/user.rb
index 1548e1ea0f..2a7fffca5d 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -73,6 +73,7 @@ class User < ApplicationRecord
 
   has_many :applications, class_name: 'Doorkeeper::Application', as: :owner
   has_many :backups, inverse_of: :user
+  has_many :invites, inverse_of: :user
 
   has_one :invite_request, class_name: 'UserInviteRequest', inverse_of: :user, dependent: :destroy
   accepts_nested_attributes_for :invite_request, reject_if: ->(attributes) { attributes['text'].blank? }
diff --git a/app/services/after_block_domain_from_account_service.rb b/app/services/after_block_domain_from_account_service.rb
index a87c2e792c..f50bde261d 100644
--- a/app/services/after_block_domain_from_account_service.rb
+++ b/app/services/after_block_domain_from_account_service.rb
@@ -10,12 +10,24 @@ class AfterBlockDomainFromAccountService < BaseService
     @account = account
     @domain  = domain
 
+    clear_notifications!
+    remove_follows!
     reject_existing_followers!
     reject_pending_follow_requests!
   end
 
   private
 
+  def remove_follows!
+    @account.active_relationships.where(account: Account.where(domain: @domain)).includes(:target_account).reorder(nil).find_each do |follow|
+      UnfollowService.new.call(@account, follow.target_account)
+    end
+  end
+
+  def clear_notifications!
+    Notification.where(account: @account).where(from_account: Account.where(domain: @domain)).in_batches.delete_all
+  end
+
   def reject_existing_followers!
     @account.passive_relationships.where(account: Account.where(domain: @domain)).includes(:account).reorder(nil).find_each do |follow|
       reject_follow!(follow)
diff --git a/app/services/after_block_service.rb b/app/services/after_block_service.rb
index 706db0d633..2a0e10a79a 100644
--- a/app/services/after_block_service.rb
+++ b/app/services/after_block_service.rb
@@ -2,43 +2,25 @@
 
 class AfterBlockService < BaseService
   def call(account, target_account)
-    clear_home_feed(account, target_account)
-    clear_notifications(account, target_account)
-    clear_conversations(account, target_account)
+    @account        = account
+    @target_account = target_account
+
+    clear_home_feed!
+    clear_notifications!
+    clear_conversations!
   end
 
   private
 
-  def clear_home_feed(account, target_account)
-    FeedManager.instance.clear_from_timeline(account, target_account)
+  def clear_home_feed!
+    FeedManager.instance.clear_from_timeline(@account, @target_account)
   end
 
-  def clear_conversations(account, target_account)
-    AccountConversation.where(account: account)
-                       .where('? = ANY(participant_account_ids)', target_account.id)
-                       .in_batches
-                       .destroy_all
+  def clear_conversations!
+    AccountConversation.where(account: @account).where('? = ANY(participant_account_ids)', @target_account.id).in_batches.destroy_all
   end
 
-  def clear_notifications(account, target_account)
-    Notification.where(account: account)
-                .joins(:follow)
-                .where(activity_type: 'Follow', follows: { account_id: target_account.id })
-                .delete_all
-
-    Notification.where(account: account)
-                .joins(mention: :status)
-                .where(activity_type: 'Mention', statuses: { account_id: target_account.id })
-                .delete_all
-
-    Notification.where(account: account)
-                .joins(:favourite)
-                .where(activity_type: 'Favourite', favourites: { account_id: target_account.id })
-                .delete_all
-
-    Notification.where(account: account)
-                .joins(:status)
-                .where(activity_type: 'Status', statuses: { account_id: target_account.id })
-                .delete_all
+  def clear_notifications!
+    Notification.where(account: @account).where(from_account: @target_account).in_batches.delete_all
   end
 end
diff --git a/app/services/follow_service.rb b/app/services/follow_service.rb
index 8e118f5d34..101acdaf96 100644
--- a/app/services/follow_service.rb
+++ b/app/services/follow_service.rb
@@ -13,7 +13,7 @@ class FollowService < BaseService
     target_account = ResolveAccountService.new.call(target_account, skip_webfinger: true)
 
     raise ActiveRecord::RecordNotFound if target_account.nil? || target_account.id == source_account.id || target_account.suspended?
-    raise Mastodon::NotPermittedError  if target_account.blocking?(source_account) || source_account.blocking?(target_account) || target_account.moved? || (!target_account.local? && target_account.ostatus?)
+    raise Mastodon::NotPermittedError  if target_account.blocking?(source_account) || source_account.blocking?(target_account) || target_account.moved? || (!target_account.local? && target_account.ostatus?) || source_account.domain_blocking?(target_account.domain)
 
     if source_account.following?(target_account)
       # We're already following this account, but we'll call follow! again to
diff --git a/app/services/hashtag_query_service.rb b/app/services/hashtag_query_service.rb
index 5773d78c6e..282821710a 100644
--- a/app/services/hashtag_query_service.rb
+++ b/app/services/hashtag_query_service.rb
@@ -14,7 +14,7 @@ class HashtagQueryService < BaseService
 
   private
 
-  def tags_for(tags)
-    Tag.where(name: tags.map(&:downcase)) if tags.presence
+  def tags_for(names)
+    Tag.matching_name(names) if names.presence
   end
 end
diff --git a/app/services/process_hashtags_service.rb b/app/services/process_hashtags_service.rb
index b6974e598b..e8e139b058 100644
--- a/app/services/process_hashtags_service.rb
+++ b/app/services/process_hashtags_service.rb
@@ -5,9 +5,7 @@ class ProcessHashtagsService < BaseService
     tags    = Extractor.extract_hashtags(status.text) if status.local?
     records = []
 
-    tags.map { |str| str.mb_chars.downcase }.uniq(&:to_s).each do |name|
-      tag = Tag.where(name: name).first_or_create(name: name)
-
+    Tag.find_or_create_by_names(tags) do |tag|
       status.tags << tag
       records << tag
 
diff --git a/app/services/search_service.rb b/app/services/search_service.rb
index e0da61dac5..769d1ac7a4 100644
--- a/app/services/search_service.rb
+++ b/app/services/search_service.rb
@@ -33,8 +33,7 @@ class SearchService < BaseService
   end
 
   def perform_statuses_search!
-    definition = StatusesIndex.filter(term: { searchable_by: @account.id })
-                              .query(multi_match: { type: 'most_fields', query: @query, operator: 'and', fields: %w(text text.stemmed) })
+    definition = parsed_query.apply(StatusesIndex.filter(term: { searchable_by: @account.id }))
 
     if @options[:account_id].present?
       definition = definition.filter(term: { account_id: @options[:account_id] })
@@ -70,7 +69,7 @@ class SearchService < BaseService
   end
 
   def url_query?
-    @options[:type].blank? && @query =~ /\Ahttps?:\/\//
+    @resolve && @options[:type].blank? && @query =~ /\Ahttps?:\/\//
   end
 
   def url_resource_results
@@ -120,4 +119,8 @@ class SearchService < BaseService
       domain_blocking_by_domain: Account.domain_blocking_map_by_domain(domains, account.id),
     }
   end
+
+  def parsed_query
+    SearchQueryTransformer.new.apply(SearchQueryParser.new.parse(@query))
+  end
 end
diff --git a/app/services/suspend_account_service.rb b/app/services/suspend_account_service.rb
index 00cffcdfc8..902af376c8 100644
--- a/app/services/suspend_account_service.rb
+++ b/app/services/suspend_account_service.rb
@@ -64,6 +64,7 @@ class SuspendAccountService < BaseService
       @account.user.destroy
     else
       @account.user.disable!
+      @account.user.invites.where(uses: 0).destroy_all
     end
   end
 
diff --git a/app/views/accounts/show.html.haml b/app/views/accounts/show.html.haml
index 0dc984dcc2..6846abeb69 100644
--- a/app/views/accounts/show.html.haml
+++ b/app/views/accounts/show.html.haml
@@ -5,7 +5,7 @@
   %meta{ name: 'description', content: account_description(@account) }/
 
   - if @account.user&.setting_noindex
-    %meta{ name: 'robots', content: 'noindex' }/
+    %meta{ name: 'robots', content: 'noindex, noarchive' }/
 
   %link{ rel: 'alternate', type: 'application/atom+xml', href: account_url(@account, format: 'atom') }/
   %link{ rel: 'alternate', type: 'application/rss+xml', href: account_url(@account, format: 'rss') }/
diff --git a/app/views/statuses/show.html.haml b/app/views/statuses/show.html.haml
index 704e37a3df..0f22d106b5 100644
--- a/app/views/statuses/show.html.haml
+++ b/app/views/statuses/show.html.haml
@@ -3,7 +3,7 @@
 
 - content_for :header_tags do
   - if @account.user&.setting_noindex
-    %meta{ name: 'robots', content: 'noindex' }/
+    %meta{ name: 'robots', content: 'noindex, noarchive' }/
 
   %link{ rel: 'alternate', type: 'application/json+oembed', href: api_oembed_url(url: short_account_status_url(@account, @status), format: 'json') }/
   %link{ rel: 'alternate', type: 'application/activity+json', href: ActivityPub::TagManager.instance.uri_for(@status) }/
diff --git a/app/workers/scheduler/preview_cards_cleanup_scheduler.rb b/app/workers/scheduler/preview_cards_cleanup_scheduler.rb
deleted file mode 100644
index 2b38792f03..0000000000
--- a/app/workers/scheduler/preview_cards_cleanup_scheduler.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-# frozen_string_literal: true
-
-class Scheduler::PreviewCardsCleanupScheduler
-  include Sidekiq::Worker
-
-  sidekiq_options unique: :until_executed, retry: 0
-
-  def perform
-    Maintenance::UncachePreviewWorker.push_bulk(recent_link_preview_cards.pluck(:id))
-    Maintenance::UncachePreviewWorker.push_bulk(older_preview_cards.pluck(:id))
-  end
-
-  private
-
-  def recent_link_preview_cards
-    PreviewCard.where(type: :link).where('updated_at < ?', 1.month.ago)
-  end
-
-  def older_preview_cards
-    PreviewCard.where('updated_at < ?', 6.months.ago)
-  end
-end
diff --git a/config/navigation.rb b/config/navigation.rb
index 52d41f72f9..244fe03d3e 100644
--- a/config/navigation.rb
+++ b/config/navigation.rb
@@ -4,13 +4,13 @@ SimpleNavigation::Configuration.run do |navigation|
   navigation.items do |n|
     n.item :web, safe_join([fa_icon('chevron-left fw'), t('settings.back')]), root_url
 
-    n.item :profile, safe_join([fa_icon('user fw'), t('settings.profile')]), settings_profile_url do |s|
+    n.item :profile, safe_join([fa_icon('user fw'), t('settings.profile')]), settings_profile_url, if: -> { current_user.functional? } do |s|
       s.item :profile, safe_join([fa_icon('pencil fw'), t('settings.appearance')]), settings_profile_url, highlights_on: %r{/settings/profile|/settings/migration}
       s.item :featured_tags, safe_join([fa_icon('hashtag fw'), t('settings.featured_tags')]), settings_featured_tags_url
       s.item :identity_proofs, safe_join([fa_icon('key fw'), t('settings.identity_proofs')]), settings_identity_proofs_path, highlights_on: %r{/settings/identity_proofs*}, if: proc { current_account.identity_proofs.exists? }
     end
 
-    n.item :preferences, safe_join([fa_icon('cog fw'), t('settings.preferences')]), settings_preferences_url do |s|
+    n.item :preferences, safe_join([fa_icon('cog fw'), t('settings.preferences')]), settings_preferences_url, if: -> { current_user.functional? } do |s|
       s.item :appearance, safe_join([fa_icon('desktop fw'), t('settings.appearance')]), settings_preferences_appearance_url
       s.item :notifications, safe_join([fa_icon('bell fw'), t('settings.notifications')]), settings_preferences_notifications_url
       s.item :other, safe_join([fa_icon('cog fw'), t('preferences.other')]), settings_preferences_other_url
@@ -22,8 +22,8 @@ SimpleNavigation::Configuration.run do |navigation|
       end
     end
 
-    n.item :relationships, safe_join([fa_icon('users fw'), t('settings.relationships')]), relationships_url
-    n.item :filters, safe_join([fa_icon('filter fw'), t('filters.index.title')]), filters_path, highlights_on: %r{/filters}
+    n.item :relationships, safe_join([fa_icon('users fw'), t('settings.relationships')]), relationships_url, if: -> { current_user.functional? }
+    n.item :filters, safe_join([fa_icon('filter fw'), t('filters.index.title')]), filters_path, highlights_on: %r{/filters}, if: -> { current_user.functional? }
 
     n.item :security, safe_join([fa_icon('lock fw'), t('settings.account')]), edit_user_registration_url do |s|
       s.item :password, safe_join([fa_icon('lock fw'), t('settings.account_settings')]), edit_user_registration_url, highlights_on: %r{/auth/edit|/settings/delete}
@@ -31,13 +31,13 @@ SimpleNavigation::Configuration.run do |navigation|
       s.item :authorized_apps, safe_join([fa_icon('list fw'), t('settings.authorized_apps')]), oauth_authorized_applications_url
     end
 
-    n.item :data, safe_join([fa_icon('cloud-download fw'), t('settings.import_and_export')]), settings_export_url do |s|
+    n.item :data, safe_join([fa_icon('cloud-download fw'), t('settings.import_and_export')]), settings_export_url, if: -> { current_user.functional? } do |s|
       s.item :import, safe_join([fa_icon('cloud-upload fw'), t('settings.import')]), settings_import_url
       s.item :export, safe_join([fa_icon('cloud-download fw'), t('settings.export')]), settings_export_url
     end
 
-    n.item :invites, safe_join([fa_icon('user-plus fw'), t('invites.title')]), invites_path, if: proc { Setting.min_invite_role == 'user' }
-    n.item :development, safe_join([fa_icon('code fw'), t('settings.development')]), settings_applications_url
+    n.item :invites, safe_join([fa_icon('user-plus fw'), t('invites.title')]), invites_path, if: proc { Setting.min_invite_role == 'user' && current_user.functional? }
+    n.item :development, safe_join([fa_icon('code fw'), t('settings.development')]), settings_applications_url, if: -> { current_user.functional? }
 
     n.item :moderation, safe_join([fa_icon('gavel fw'), t('moderation.title')]), admin_reports_url, if: proc { current_user.staff? } do |s|
       s.item :action_logs, safe_join([fa_icon('bars fw'), t('admin.action_logs.title')]), admin_action_logs_url
diff --git a/config/sidekiq.yml b/config/sidekiq.yml
index 7f41b6607b..6ebe450b00 100644
--- a/config/sidekiq.yml
+++ b/config/sidekiq.yml
@@ -24,9 +24,6 @@
   ip_cleanup_scheduler:
     cron: '<%= Random.rand(0..59) %> <%= Random.rand(3..5) %> * * *'
     class: Scheduler::IpCleanupScheduler
-  preview_cards_cleanup_scheduler:
-    cron: '<%= Random.rand(0..59) %> <%= Random.rand(3..5) %> * * *'
-    class: Scheduler::PreviewCardsCleanupScheduler
   email_scheduler:
     cron: '0 10 * * 2'
     class: Scheduler::EmailScheduler
diff --git a/db/migrate/20190726175042_add_case_insensitive_index_to_tags.rb b/db/migrate/20190726175042_add_case_insensitive_index_to_tags.rb
new file mode 100644
index 0000000000..6fa8c0ec43
--- /dev/null
+++ b/db/migrate/20190726175042_add_case_insensitive_index_to_tags.rb
@@ -0,0 +1,15 @@
+class AddCaseInsensitiveIndexToTags < ActiveRecord::Migration[5.2]
+  disable_ddl_transaction!
+
+  def up
+    safety_assured { execute 'CREATE UNIQUE INDEX CONCURRENTLY index_tags_on_name_lower ON tags (lower(name))' }
+    remove_index :tags, name: 'index_tags_on_name'
+    remove_index :tags, name: 'hashtag_search_index'
+  end
+
+  def down
+    add_index :tags, :name, unique: true, algorithm: :concurrently
+    safety_assured { execute 'CREATE INDEX CONCURRENTLY hashtag_search_index ON tags (name text_pattern_ops)' }
+    remove_index :tags, name: 'index_tags_on_name_lower'
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index b7da26e35c..22cea1507c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_07_15_164535) do
+ActiveRecord::Schema.define(version: 2019_07_26_175042) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -665,8 +665,7 @@ ActiveRecord::Schema.define(version: 2019_07_15_164535) do
     t.string "name", default: "", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index "lower((name)::text) text_pattern_ops", name: "hashtag_search_index"
-    t.index ["name"], name: "index_tags_on_name", unique: true
+    t.index "lower((name)::text)", name: "index_tags_on_name_lower", unique: true
   end
 
   create_table "tombstones", force: :cascade do |t|
diff --git a/lib/cli.rb b/lib/cli.rb
index be276583d2..fbdf49fc34 100644
--- a/lib/cli.rb
+++ b/lib/cli.rb
@@ -9,6 +9,7 @@ require_relative 'mastodon/search_cli'
 require_relative 'mastodon/settings_cli'
 require_relative 'mastodon/statuses_cli'
 require_relative 'mastodon/domains_cli'
+require_relative 'mastodon/preview_cards_cli'
 require_relative 'mastodon/cache_cli'
 require_relative 'mastodon/version'
 
@@ -42,6 +43,9 @@ module Mastodon
     desc 'domains SUBCOMMAND ...ARGS', 'Manage account domains'
     subcommand 'domains', Mastodon::DomainsCLI
 
+    desc 'preview_cards SUBCOMMAND ...ARGS', 'Manage preview cards'
+    subcommand 'preview_cards', Mastodon::PreviewCardsCLI
+
     desc 'cache SUBCOMMAND ...ARGS', 'Manage cache'
     subcommand 'cache', Mastodon::CacheCLI
 
diff --git a/lib/json_ld/security.rb b/lib/json_ld/security.rb
index 1230206f03..a6fbce95f5 100644
--- a/lib/json_ld/security.rb
+++ b/lib/json_ld/security.rb
@@ -1,9 +1,9 @@
 # -*- encoding: utf-8 -*-
 # frozen_string_literal: true
-# This file generated automatically from https://w3id.org/security/v1
+# This file generated automatically from http://w3id.org/security/v1
 require 'json/ld'
 class JSON::LD::Context
-  add_preloaded("https://w3id.org/security/v1") do
+  add_preloaded("http://w3id.org/security/v1") do
     new(processingMode: "json-ld-1.0", term_definitions: {
       "CryptographicKey" => TermDefinition.new("CryptographicKey", id: "https://w3id.org/security#Key", simple: true),
       "EcdsaKoblitzSignature2016" => TermDefinition.new("EcdsaKoblitzSignature2016", id: "https://w3id.org/security#EcdsaKoblitzSignature2016", simple: true),
@@ -47,4 +47,5 @@ class JSON::LD::Context
       "xsd" => TermDefinition.new("xsd", id: "http://www.w3.org/2001/XMLSchema#", simple: true, prefix: true)
     })
   end
+  alias_preloaded("https://w3id.org/security/v1", "http://w3id.org/security/v1")
 end
diff --git a/lib/mastodon/preview_cards_cli.rb b/lib/mastodon/preview_cards_cli.rb
new file mode 100644
index 0000000000..465fe7d0b0
--- /dev/null
+++ b/lib/mastodon/preview_cards_cli.rb
@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+require 'tty-prompt'
+require_relative '../../config/boot'
+require_relative '../../config/environment'
+require_relative 'cli_helper'
+
+module Mastodon
+  class PreviewCardsCLI < Thor
+    include ActionView::Helpers::NumberHelper
+
+    def self.exit_on_failure?
+      true
+    end
+
+    option :days, type: :numeric, default: 180
+    option :background, type: :boolean, default: false
+    option :verbose, type: :boolean, default: false
+    option :dry_run, type: :boolean, default: false
+    option :link, type: :boolean, default: false
+    desc 'remove', 'Remove preview cards'
+    long_desc <<-DESC
+      Removes locally thumbnails for previews.
+
+      The --days option specifies how old preview cards have to be before
+      they are removed. It defaults to 180 days.
+
+      With the --background option, instead of deleting the files sequentially,
+      they will be queued into Sidekiq and the command will exit as soon as
+      possible. In Sidekiq they will be processed with higher concurrency, but
+      it may impact other operations of the Mastodon server, and it may overload
+      the underlying file storage.
+
+      With the --dry-run option, no work will be done.
+
+      With the --verbose option, when preview cards are processed sequentially in the
+      foreground, the IDs of the preview cards will be printed.
+
+      With the --link option, delete only link-type preview cards.
+    DESC
+    def remove
+      prompt    = TTY::Prompt.new
+      time_ago  = options[:days].days.ago
+      queued    = 0
+      processed = 0
+      size      = 0
+      dry_run   = options[:dry_run] ? '(DRY RUN)' : ''
+      link      = options[:link] ? 'link-type ' : ''
+      scope     = PreviewCard.where.not(image_file_name: nil)
+      scope     = scope.where.not(image_file_name: '')
+      scope     = scope.where(type: :link) if options[:link]
+      scope     = scope.where('updated_at < ?', time_ago)
+
+      if time_ago > 2.weeks.ago
+        prompt.say "\n"
+        prompt.say('The preview cards less than the past two weeks will not be re-acquired even when needed.')
+        prompt.say "\n"
+
+        unless prompt.yes?('Are you sure you want to delete the preview cards?', default: false)
+          prompt.say "\n"
+          prompt.warn 'Nothing execute. Bye!'
+          prompt.say "\n"
+          exit(1)
+        end
+      end
+
+      if options[:background]
+        scope.select(:id, :image_file_size).reorder(nil).find_in_batches do |preview_cards|
+          queued += preview_cards.size
+          size   += preview_cards.reduce(0) { |sum, p| sum + (p.image_file_size || 0) }
+          Maintenance::UncachePreviewWorker.push_bulk(preview_cards.map(&:id)) unless options[:dry_run]
+        end
+
+      else
+        scope.select(:id, :image_file_size).reorder(nil).find_in_batches do |preview_cards|
+          preview_cards.each do |p|
+            size += p.image_file_size || 0
+            Maintenance::UncachePreviewWorker.new.perform(p.id) unless options[:dry_run]
+            options[:verbose] ? say(p.id) : say('.', :green, false)
+            processed += 1
+          end
+        end
+      end
+
+      say
+
+      if options[:background]
+        say("Scheduled the deletion of #{queued} #{link}preview cards (approx. #{number_to_human_size(size)}) #{dry_run}", :green, true)
+      else
+        say("Removed #{processed} #{link}preview cards (approx. #{number_to_human_size(size)}) #{dry_run}", :green, true)
+      end
+    end
+  end
+end
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index cd216b92df..4645feb2f3 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -16,22 +16,18 @@ module Mastodon
       2
     end
 
-    def pre
-      nil
-    end
-
     def flags
       ''
     end
 
-    def to_a
-      [major, minor, patch, pre].compact
-    end
-
     def suffix
       '+glitch'
     end
 
+    def to_a
+      [major, minor, patch].compact
+    end
+
     def to_s
       [to_a.join('.'), flags, suffix].join
     end
diff --git a/spec/lib/spam_check_spec.rb b/spec/lib/spam_check_spec.rb
index c722dc6427..9e0989216a 100644
--- a/spec/lib/spam_check_spec.rb
+++ b/spec/lib/spam_check_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe SpamCheck do
@@ -133,7 +135,31 @@ RSpec.describe SpamCheck do
   end
 
   describe '#remember!' do
-    pending
+    let(:status) { status_with_html('@alice') }
+    let(:spam_check) { described_class.new(status) }
+    let(:redis_key) { spam_check.send(:redis_key) }
+
+    it 'remembers' do
+      expect do
+        spam_check.remember!
+      end.to change { Redis.current.exists(redis_key) }.from(false).to(true)
+    end
+  end
+
+  describe '#reset!' do
+    let(:status) { status_with_html('@alice') }
+    let(:spam_check) { described_class.new(status) }
+    let(:redis_key) { spam_check.send(:redis_key) }
+
+    before do
+      spam_check.remember!
+    end
+
+    it 'resets' do
+      expect do
+        spam_check.reset!
+      end.to change { Redis.current.exists(redis_key) }.from(true).to(false)
+    end
   end
 
   describe '#flag!' do
diff --git a/spec/models/invite_spec.rb b/spec/models/invite_spec.rb
index 0ba1dccb33..30abfb86bf 100644
--- a/spec/models/invite_spec.rb
+++ b/spec/models/invite_spec.rb
@@ -3,27 +3,33 @@ require 'rails_helper'
 RSpec.describe Invite, type: :model do
   describe '#valid_for_use?' do
     it 'returns true when there are no limitations' do
-      invite = Invite.new(max_uses: nil, expires_at: nil)
+      invite = Fabricate(:invite, max_uses: nil, expires_at: nil)
       expect(invite.valid_for_use?).to be true
     end
 
     it 'returns true when not expired' do
-      invite = Invite.new(max_uses: nil, expires_at: 1.hour.from_now)
+      invite = Fabricate(:invite, max_uses: nil, expires_at: 1.hour.from_now)
       expect(invite.valid_for_use?).to be true
     end
 
     it 'returns false when expired' do
-      invite = Invite.new(max_uses: nil, expires_at: 1.hour.ago)
+      invite = Fabricate(:invite, max_uses: nil, expires_at: 1.hour.ago)
       expect(invite.valid_for_use?).to be false
     end
 
     it 'returns true when uses still available' do
-      invite = Invite.new(max_uses: 250, uses: 249, expires_at: nil)
+      invite = Fabricate(:invite, max_uses: 250, uses: 249, expires_at: nil)
       expect(invite.valid_for_use?).to be true
     end
 
     it 'returns false when maximum uses reached' do
-      invite = Invite.new(max_uses: 250, uses: 250, expires_at: nil)
+      invite = Fabricate(:invite, max_uses: 250, uses: 250, expires_at: nil)
+      expect(invite.valid_for_use?).to be false
+    end
+
+    it 'returns false when invite creator has been disabled' do
+      invite = Fabricate(:invite, max_uses: nil, expires_at: nil)
+      SuspendAccountService.new.call(invite.user.account)
       expect(invite.valid_for_use?).to be false
     end
   end
diff --git a/spec/models/poll_vote_spec.rb b/spec/models/poll_vote_spec.rb
index 354afd5350..563f346993 100644
--- a/spec/models/poll_vote_spec.rb
+++ b/spec/models/poll_vote_spec.rb
@@ -1,5 +1,13 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 RSpec.describe PollVote, type: :model do
-  pending "add some examples to (or delete) #{__FILE__}"
+  describe '#object_type' do
+    let(:poll_vote) { Fabricate.build(:poll_vote) }
+
+    it 'returns :vote' do
+      expect(poll_vote.object_type).to eq :vote
+    end
+  end
 end
diff --git a/spec/services/search_service_spec.rb b/spec/services/search_service_spec.rb
index d064cd9b85..ade306ed28 100644
--- a/spec/services/search_service_spec.rb
+++ b/spec/services/search_service_spec.rb
@@ -27,7 +27,7 @@ describe SearchService, type: :service do
         it 'returns the empty results' do
           service = double(call: nil)
           allow(ResolveURLService).to receive(:new).and_return(service)
-          results = subject.call(@query, nil, 10)
+          results = subject.call(@query, nil, 10, resolve: true)
 
           expect(service).to have_received(:call).with(@query, on_behalf_of: nil)
           expect(results).to eq empty_results
@@ -40,7 +40,7 @@ describe SearchService, type: :service do
           service = double(call: account)
           allow(ResolveURLService).to receive(:new).and_return(service)
 
-          results = subject.call(@query, nil, 10)
+          results = subject.call(@query, nil, 10, resolve: true)
           expect(service).to have_received(:call).with(@query, on_behalf_of: nil)
           expect(results).to eq empty_results.merge(accounts: [account])
         end
@@ -52,7 +52,7 @@ describe SearchService, type: :service do
           service = double(call: status)
           allow(ResolveURLService).to receive(:new).and_return(service)
 
-          results = subject.call(@query, nil, 10)
+          results = subject.call(@query, nil, 10, resolve: true)
           expect(service).to have_received(:call).with(@query, on_behalf_of: nil)
           expect(results).to eq empty_results.merge(statuses: [status])
         end