diff --git a/app/controllers/admin/custom_emojis_controller.rb b/app/controllers/admin/custom_emojis_controller.rb
index ccab03de4..d61bafdf0 100644
--- a/app/controllers/admin/custom_emojis_controller.rb
+++ b/app/controllers/admin/custom_emojis_controller.rb
@@ -3,6 +3,7 @@
 module Admin
   class CustomEmojisController < BaseController
     before_action :set_custom_emoji, except: [:index, :new, :create]
+    before_action :set_filter_params
 
     def index
       authorize :custom_emoji, :index?
@@ -32,23 +33,26 @@ module Admin
 
       if @custom_emoji.update(resource_params)
         log_action :update, @custom_emoji
-        redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.updated_msg')
+        flash[:notice] = I18n.t('admin.custom_emojis.updated_msg')
       else
-        redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.update_failed_msg')
+        flash[:alert] =  I18n.t('admin.custom_emojis.update_failed_msg')
       end
+      redirect_to admin_custom_emojis_path(page: params[:page], **@filter_params)
     end
 
     def destroy
       authorize @custom_emoji, :destroy?
       @custom_emoji.destroy!
       log_action :destroy, @custom_emoji
-      redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.destroyed_msg')
+      flash[:notice] = I18n.t('admin.custom_emojis.destroyed_msg')
+      redirect_to admin_custom_emojis_path(page: params[:page], **@filter_params)
     end
 
     def copy
       authorize @custom_emoji, :copy?
 
-      emoji = CustomEmoji.find_or_initialize_by(domain: nil, shortcode: @custom_emoji.shortcode)
+      emoji = CustomEmoji.find_or_initialize_by(domain: nil,
+                                                shortcode: @custom_emoji.shortcode)
       emoji.image = @custom_emoji.image
 
       if emoji.save
@@ -58,21 +62,23 @@ module Admin
         flash[:alert] = I18n.t('admin.custom_emojis.copy_failed_msg')
       end
 
-      redirect_to admin_custom_emojis_path(page: params[:page])
+      redirect_to admin_custom_emojis_path(page: params[:page], **@filter_params)
     end
 
     def enable
       authorize @custom_emoji, :enable?
       @custom_emoji.update!(disabled: false)
       log_action :enable, @custom_emoji
-      redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.enabled_msg')
+      flash[:notice] = I18n.t('admin.custom_emojis.enabled_msg')
+      redirect_to admin_custom_emojis_path(page: params[:page], **@filter_params)
     end
 
     def disable
       authorize @custom_emoji, :disable?
       @custom_emoji.update!(disabled: true)
       log_action :disable, @custom_emoji
-      redirect_to admin_custom_emojis_path, notice: I18n.t('admin.custom_emojis.disabled_msg')
+      flash[:notice] = I18n.t('admin.custom_emojis.disabled_msg')
+      redirect_to admin_custom_emojis_path(page: params[:page], **@filter_params)
     end
 
     private
@@ -81,6 +87,10 @@ module Admin
       @custom_emoji = CustomEmoji.find(params[:id])
     end
 
+    def set_filter_params
+      @filter_params = filter_params.to_hash.symbolize_keys
+    end
+
     def resource_params
       params.require(:custom_emoji).permit(:shortcode, :image, :visible_in_picker)
     end
diff --git a/app/controllers/admin/settings_controller.rb b/app/controllers/admin/settings_controller.rb
index eed5fb6b5..487282dc3 100644
--- a/app/controllers/admin/settings_controller.rb
+++ b/app/controllers/admin/settings_controller.rb
@@ -17,6 +17,8 @@ module Admin
       bootstrap_timeline_accounts
       thumbnail
       min_invite_role
+      activity_api_enabled
+      peers_api_enabled
     ).freeze
 
     BOOLEAN_SETTINGS = %w(
@@ -24,6 +26,8 @@ module Admin
       open_deletion
       timeline_preview
       show_staff_badge
+      activity_api_enabled
+      peers_api_enabled
     ).freeze
 
     UPLOAD_SETTINGS = %w(
diff --git a/app/controllers/api/v1/instances/activity_controller.rb b/app/controllers/api/v1/instances/activity_controller.rb
new file mode 100644
index 000000000..36f52c38d
--- /dev/null
+++ b/app/controllers/api/v1/instances/activity_controller.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+class Api::V1::Instances::ActivityController < Api::BaseController
+  before_action :require_enabled_api!
+
+  respond_to :json
+
+  def show
+    render_cached_json('api:v1:instances:activity:show', expires_in: 1.day) { activity }
+  end
+
+  private
+
+  def activity
+    weeks = []
+
+    12.times do |i|
+      day     = i.weeks.ago.to_date
+      week_id = day.cweek
+      week    = Date.commercial(day.cwyear, week_id)
+
+      weeks << {
+        week: week.to_time.to_i.to_s,
+        statuses: Redis.current.get("activity:statuses:local:#{week_id}") || 0,
+        logins: Redis.current.pfcount("activity:logins:#{week_id}"),
+        registrations: Redis.current.get("activity:accounts:local:#{week_id}") || 0,
+      }
+    end
+
+    weeks
+  end
+
+  def require_enabled_api!
+    head 404 unless Setting.activity_api_enabled
+  end
+end
diff --git a/app/controllers/api/v1/instances/peers_controller.rb b/app/controllers/api/v1/instances/peers_controller.rb
new file mode 100644
index 000000000..2070c487d
--- /dev/null
+++ b/app/controllers/api/v1/instances/peers_controller.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class Api::V1::Instances::PeersController < Api::BaseController
+  before_action :require_enabled_api!
+
+  respond_to :json
+
+  def index
+    render_cached_json('api:v1:instances:peers:index', expires_in: 1.day) { Account.remote.domains }
+  end
+
+  private
+
+  def require_enabled_api!
+    head 404 unless Setting.peers_api_enabled
+  end
+end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 3b2070f39..46367f202 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -196,4 +196,13 @@ class ApplicationController < ActionController::Base
       end
     end
   end
+
+  def render_cached_json(cache_key, **options)
+    data = Rails.cache.fetch(cache_key, { raw: true }.merge(options)) do
+      yield.to_json
+    end
+
+    expires_in options[:expires_in], public: true
+    render json: data
+  end
 end
diff --git a/app/controllers/auth/confirmations_controller.rb b/app/controllers/auth/confirmations_controller.rb
index 5ffa1c9a3..72b8e9dd8 100644
--- a/app/controllers/auth/confirmations_controller.rb
+++ b/app/controllers/auth/confirmations_controller.rb
@@ -2,14 +2,9 @@
 
 class Auth::ConfirmationsController < Devise::ConfirmationsController
   layout 'auth'
+
   before_action :set_pack
 
-  def show
-    super do |user|
-      BootstrapTimelineWorker.perform_async(user.account_id) if user.errors.empty?
-    end
-  end
-  
   private
 
   def set_pack
diff --git a/app/controllers/concerns/user_tracking_concern.rb b/app/controllers/concerns/user_tracking_concern.rb
index 8663c3086..1e3132941 100644
--- a/app/controllers/concerns/user_tracking_concern.rb
+++ b/app/controllers/concerns/user_tracking_concern.rb
@@ -17,6 +17,7 @@ module UserTrackingConcern
 
     # Mark as signed-in today
     current_user.update_tracked_fields!(request)
+    ActivityTracker.record('activity:logins', current_user.id)
 
     # Regenerate feed if needed
     regenerate_feed! if user_needs_feed_update?
diff --git a/app/controllers/well_known/host_meta_controller.rb b/app/controllers/well_known/host_meta_controller.rb
index 40f96eaa2..5fb70288a 100644
--- a/app/controllers/well_known/host_meta_controller.rb
+++ b/app/controllers/well_known/host_meta_controller.rb
@@ -1,15 +1,19 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class HostMetaController < ApplicationController
+  class HostMetaController < ActionController::Base
     include RoutingHelper
 
+    before_action { response.headers['Vary'] = 'Accept' }
+
     def show
       @webfinger_template = "#{webfinger_url}?resource={uri}"
 
       respond_to do |format|
         format.xml { render content_type: 'application/xrd+xml' }
       end
+
+      expires_in(3.days, public: true)
     end
   end
 end
diff --git a/app/controllers/well_known/webfinger_controller.rb b/app/controllers/well_known/webfinger_controller.rb
index 5cc606808..28654b61d 100644
--- a/app/controllers/well_known/webfinger_controller.rb
+++ b/app/controllers/well_known/webfinger_controller.rb
@@ -1,9 +1,11 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class WebfingerController < ApplicationController
+  class WebfingerController < ActionController::Base
     include RoutingHelper
 
+    before_action { response.headers['Vary'] = 'Accept' }
+
     def show
       @account = Account.find_local!(username_from_resource)
 
@@ -16,6 +18,8 @@ module WellKnown
           render content_type: 'application/xrd+xml'
         end
       end
+
+      expires_in(3.days, public: true)
     rescue ActiveRecord::RecordNotFound
       head 404
     end
diff --git a/app/javascript/mastodon/actions/push_notifications/registerer.js b/app/javascript/mastodon/actions/push_notifications/registerer.js
index f851c311c..1d040bc8c 100644
--- a/app/javascript/mastodon/actions/push_notifications/registerer.js
+++ b/app/javascript/mastodon/actions/push_notifications/registerer.js
@@ -51,7 +51,7 @@ const sendSubscriptionToBackend = (subscription, me) => {
 // Last one checks for payload support: https://web-push-book.gauntface.com/chapter-06/01-non-standards-browsers/#no-payload
 const supportsPushNotifications = ('serviceWorker' in navigator && 'PushManager' in window && 'getKey' in PushSubscription.prototype);
 
-export default function register () {
+export function register () {
   return (dispatch, getState) => {
     dispatch(setBrowserSupport(supportsPushNotifications));
     const me = getState().getIn(['meta', 'me']);
diff --git a/app/javascript/mastodon/locales/ko.json b/app/javascript/mastodon/locales/ko.json
index 0798fa7cf..7e77b7824 100644
--- a/app/javascript/mastodon/locales/ko.json
+++ b/app/javascript/mastodon/locales/ko.json
@@ -213,6 +213,7 @@
   "search_popout.tips.user": "유저",
   "search_results.total": "{count, number}건의 결과",
   "standalone.public_title": "A look inside...",
+  "status.block": "@{name} 차단",
   "status.cannot_reblog": "이 포스트는 부스트 할 수 없습니다",
   "status.delete": "삭제",
   "status.embed": "공유하기",
@@ -221,6 +222,7 @@
   "status.media_hidden": "미디어 숨겨짐",
   "status.mention": "답장",
   "status.more": "자세히",
+  "status.mute": "@{name} 뮤트",
   "status.mute_conversation": "이 대화를 뮤트",
   "status.open": "상세 정보 표시",
   "status.pin": "고정",
diff --git a/app/javascript/mastodon/main.js b/app/javascript/mastodon/main.js
index 9b18465f5..5d73caa10 100644
--- a/app/javascript/mastodon/main.js
+++ b/app/javascript/mastodon/main.js
@@ -1,4 +1,4 @@
-import { register as registerPushNotifications } from './actions/push_notifications';
+import * as registerPushNotifications from './actions/push_notifications';
 import { default as Mastodon, store } from './containers/mastodon';
 import React from 'react';
 import ReactDOM from 'react-dom';
diff --git a/app/lib/activity_tracker.rb b/app/lib/activity_tracker.rb
new file mode 100644
index 000000000..50e927b0c
--- /dev/null
+++ b/app/lib/activity_tracker.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class ActivityTracker
+  EXPIRE_AFTER = 90.days.seconds
+
+  class << self
+    def increment(prefix)
+      key = [prefix, current_week].join(':')
+
+      redis.incrby(key, 1)
+      redis.expire(key, EXPIRE_AFTER)
+    end
+
+    def record(prefix, value)
+      key = [prefix, current_week].join(':')
+
+      redis.pfadd(key, value)
+      redis.expire(key, value)
+    end
+
+    private
+
+    def redis
+      Redis.current
+    end
+
+    def current_week
+      Time.zone.today.cweek
+    end
+  end
+end
diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index c1d2cf420..dd629279c 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -30,6 +30,10 @@ class Form::AdminSettings
     :bootstrap_timeline_accounts=,
     :min_invite_role,
     :min_invite_role=,
+    :activity_api_enabled,
+    :activity_api_enabled=,
+    :peers_api_enabled,
+    :peers_api_enabled=,
     to: Setting
   )
 end
diff --git a/app/models/status.rb b/app/models/status.rb
index db3072571..cb18b0705 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -138,6 +138,7 @@ class Status < ApplicationRecord
   end
 
   after_create_commit :store_uri, if: :local?
+  after_create_commit :update_statistics, if: :local?
 
   around_create Mastodon::Snowflake::Callbacks
 
@@ -336,4 +337,9 @@ class Status < ApplicationRecord
   def set_local
     self.local = account.local?
   end
+
+  def update_statistics
+    return unless public_visibility? || unlisted_visibility?
+    ActivityTracker.increment('activity:statuses:local')
+  end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 47bf22e17..fed9c4977 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -122,9 +122,19 @@ class User < ApplicationRecord
     update!(disabled: false)
   end
 
+  def confirm
+    return if confirmed?
+
+    super
+    update_statistics!
+  end
+
   def confirm!
+    return if confirmed?
+
     skip_confirmation!
     save!
+    update_statistics!
   end
 
   def promote!
@@ -202,4 +212,9 @@ class User < ApplicationRecord
   def sanitize_languages
     filtered_languages.reject!(&:blank?)
   end
+
+  def update_statistics!
+    BootstrapTimelineWorker.perform_async(account_id)
+    ActivityTracker.increment('activity:accounts:local')
+  end
 end
diff --git a/app/views/admin/custom_emojis/_custom_emoji.html.haml b/app/views/admin/custom_emojis/_custom_emoji.html.haml
index f7fd2538c..fbaa9a174 100644
--- a/app/views/admin/custom_emojis/_custom_emoji.html.haml
+++ b/app/views/admin/custom_emojis/_custom_emoji.html.haml
@@ -11,18 +11,18 @@
   %td
     - if custom_emoji.local?
       - if custom_emoji.visible_in_picker
-        = table_link_to 'eye', t('admin.custom_emojis.listed'), admin_custom_emoji_path(custom_emoji, custom_emoji: { visible_in_picker: false }), method: :patch
+        = table_link_to 'eye', t('admin.custom_emojis.listed'), admin_custom_emoji_path(custom_emoji, custom_emoji: { visible_in_picker: false }, page: params[:page], **@filter_params), method: :patch
       - else
-        = table_link_to 'eye-slash', t('admin.custom_emojis.unlisted'), admin_custom_emoji_path(custom_emoji, custom_emoji: { visible_in_picker: true }), method: :patch
+        = table_link_to 'eye-slash', t('admin.custom_emojis.unlisted'), admin_custom_emoji_path(custom_emoji, custom_emoji: { visible_in_picker: true }, page: params[:page], **@filter_params), method: :patch
     - else
       - if custom_emoji.local_counterpart.present?
-        = link_to safe_join([custom_emoji_tag(custom_emoji.local_counterpart), t('admin.custom_emojis.overwrite')]), copy_admin_custom_emoji_path(custom_emoji, page: params[:page]), method: :post, class: 'table-action-link'
+        = link_to safe_join([custom_emoji_tag(custom_emoji.local_counterpart), t('admin.custom_emojis.overwrite')]), copy_admin_custom_emoji_path(custom_emoji, page: params[:page], **@filter_params), method: :post, class: 'table-action-link'
       - else
-        = table_link_to 'copy', t('admin.custom_emojis.copy'), copy_admin_custom_emoji_path(custom_emoji, page: params[:page]), method: :post
+        = table_link_to 'copy', t('admin.custom_emojis.copy'), copy_admin_custom_emoji_path(custom_emoji, page: params[:page], **@filter_params), method: :post
   %td
     - if custom_emoji.disabled?
-      = table_link_to 'power-off', t('admin.custom_emojis.enable'), enable_admin_custom_emoji_path(custom_emoji), method: :post, data: { confirm: t('admin.accounts.are_you_sure') }
+      = table_link_to 'power-off', t('admin.custom_emojis.enable'), enable_admin_custom_emoji_path(custom_emoji, page: params[:page], **@filter_params), method: :post, data: { confirm: t('admin.accounts.are_you_sure') }
     - else
-      = table_link_to 'power-off', t('admin.custom_emojis.disable'), disable_admin_custom_emoji_path(custom_emoji), method: :post, data: { confirm: t('admin.accounts.are_you_sure') }
+      = table_link_to 'power-off', t('admin.custom_emojis.disable'), disable_admin_custom_emoji_path(custom_emoji, page: params[:page], **@filter_params), method: :post, data: { confirm: t('admin.accounts.are_you_sure') }
   %td
-    = table_link_to 'times', t('admin.custom_emojis.delete'), admin_custom_emoji_path(custom_emoji), method: :delete, data: { confirm: t('admin.accounts.are_you_sure') }
+    = table_link_to 'times', t('admin.custom_emojis.delete'), admin_custom_emoji_path(custom_emoji, page: params[:page], **@filter_params), method: :delete, data: { confirm: t('admin.accounts.are_you_sure') }
diff --git a/app/views/admin/custom_emojis/index.html.haml b/app/views/admin/custom_emojis/index.html.haml
index 89ea3a6fe..3a119276c 100644
--- a/app/views/admin/custom_emojis/index.html.haml
+++ b/app/views/admin/custom_emojis/index.html.haml
@@ -29,7 +29,7 @@
 
     .actions
       %button= t('admin.accounts.search')
-      = link_to t('admin.accounts.reset'), admin_accounts_path, class: 'button negative'
+      = link_to t('admin.accounts.reset'), admin_custom_emojis_path, class: 'button negative'
 
 .table-wrapper
   %table.table
diff --git a/app/views/admin/settings/edit.html.haml b/app/views/admin/settings/edit.html.haml
index c7c25f528..4f9115ed2 100644
--- a/app/views/admin/settings/edit.html.haml
+++ b/app/views/admin/settings/edit.html.haml
@@ -46,5 +46,13 @@
   .fields-group
     = f.input :bootstrap_timeline_accounts, wrapper: :with_block_label, label: t('admin.settings.bootstrap_timeline_accounts.title'), hint: t('admin.settings.bootstrap_timeline_accounts.desc_html')
 
+  %hr/
+
+  .fields-group
+    = f.input :activity_api_enabled, as: :boolean, wrapper: :with_label, label: t('admin.settings.activity_api_enabled.title'), hint: t('admin.settings.activity_api_enabled.desc_html')
+
+  .fields-group
+    = f.input :peers_api_enabled, as: :boolean, wrapper: :with_label, label: t('admin.settings.peers_api_enabled.title'), hint: t('admin.settings.peers_api_enabled.desc_html')
+
   .actions
     = f.button :button, t('generic.save_changes'), type: :submit
diff --git a/config/locales/en.yml b/config/locales/en.yml
index b283f94f0..2691b9ed9 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -265,12 +265,18 @@ en:
       unresolved: Unresolved
       view: View
     settings:
+      activity_api_enabled:
+        desc_html: Counts of locally posted statuses, active users, and new registrations in weekly buckets
+        title: Publish aggregate statistics about user activity
       bootstrap_timeline_accounts:
         desc_html: Separate multiple usernames by comma. Only local and unlocked accounts will work. Default when empty is all local admins.
         title: Default follows for new users
       contact_information:
         email: Business e-mail
         username: Contact username
+      peers_api_enabled:
+        desc_html: Domain names this instance has encountered in the fediverse
+        title: Publish list of discovered instances
       registrations:
         closed_message:
           desc_html: Displayed on frontpage when registrations are closed. You can use HTML tags
diff --git a/config/locales/ko.yml b/config/locales/ko.yml
index 31c946c00..2edb7ffd7 100644
--- a/config/locales/ko.yml
+++ b/config/locales/ko.yml
@@ -265,12 +265,18 @@ ko:
       unresolved: 미해결
       view: 표시
     settings:
+      activity_api_enabled:
+        desc_html: 주별 로컬에 게시 된 글, 활성 사용자 및 새로운 가입자 수
+        title: 유저 활동에 대한 통계 발행
       bootstrap_timeline_accounts:
         desc_html: 콤마로 여러 유저명을 구분. 로컬의 잠기지 않은 계정만 가능합니다. 비워 둘 경우 모든 로컬 관리자가 기본으로 사용 됩니다.
         title: 새 유저가 팔로우 할 계정들
       contact_information:
         email: 공개할 메일 주소를 입력
         username: 아이디를 입력
+      peers_api_enabled:
+        desc_html: 이 인스턴스가 페디버스에서 만났던 도메인 네임들
+        title: 발견 된 인스턴스들의 리스트 발행
       registrations:
         closed_message:
           desc_html: 신규 등록을 받지 않을 때 프론트 페이지에 표시됩니다. <br>HTML 태그를 사용할 수 있습니다.
diff --git a/config/routes.rb b/config/routes.rb
index 5b0ee9324..f45684519 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -255,7 +255,11 @@ Rails.application.routes.draw do
 
       resources :apps, only: [:create]
 
-      resource :instance,      only: [:show]
+      resource :instance, only: [:show] do
+        resources :peers, only: [:index], controller: 'instances/peers'
+        resource :activity, only: [:show], controller: 'instances/activity'
+      end
+
       resource :domain_blocks, only: [:show, :create, :destroy]
 
       resources :follow_requests, only: [:index] do
diff --git a/config/settings.yml b/config/settings.yml
index dbc5f6a26..507b7c066 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -49,7 +49,8 @@ defaults: &defaults
     - webmaster
     - administrator
   bootstrap_timeline_accounts: ''
-
+  activity_api_enabled: true
+  peers_api_enabled: true
 development:
   <<: *defaults