diff --git a/app/controllers/api/web/push_subscriptions_controller.rb b/app/controllers/api/web/push_subscriptions_controller.rb
index 52e250d02..68ccbd5e2 100644
--- a/app/controllers/api/web/push_subscriptions_controller.rb
+++ b/app/controllers/api/web/push_subscriptions_controller.rb
@@ -4,6 +4,7 @@ class Api::Web::PushSubscriptionsController < Api::BaseController
   respond_to :json
 
   before_action :require_user!
+  protect_from_forgery with: :exception
 
   def create
     params.require(:subscription).require(:endpoint)
diff --git a/app/javascript/mastodon/features/ui/components/columns_area.js b/app/javascript/mastodon/features/ui/components/columns_area.js
index f00b74dfd..a01e5a390 100644
--- a/app/javascript/mastodon/features/ui/components/columns_area.js
+++ b/app/javascript/mastodon/features/ui/components/columns_area.js
@@ -37,6 +37,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
   static propTypes = {
     intl: PropTypes.object.isRequired,
     columns: ImmutablePropTypes.list.isRequired,
+    isModalOpen: PropTypes.bool.isRequired,
     singleColumn: PropTypes.bool,
     children: PropTypes.node,
   };
@@ -144,7 +145,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
   }
 
   render () {
-    const { columns, children, singleColumn } = this.props;
+    const { columns, children, singleColumn, isModalOpen } = this.props;
     const { shouldAnimate } = this.state;
 
     const columnIndex = getIndex(this.context.router.history.location.pathname);
@@ -159,7 +160,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
     }
 
     return (
-      <div className='columns-area' ref={this.setRef}>
+      <div className={`columns-area ${ isModalOpen ? 'unscrollable' : '' }`} ref={this.setRef}>
         {columns.map(column => {
           const params = column.get('params', null) === null ? null : column.get('params').toJS();
 
diff --git a/app/javascript/mastodon/features/ui/containers/columns_area_container.js b/app/javascript/mastodon/features/ui/containers/columns_area_container.js
index 95f95618b..f3e82a8ac 100644
--- a/app/javascript/mastodon/features/ui/containers/columns_area_container.js
+++ b/app/javascript/mastodon/features/ui/containers/columns_area_container.js
@@ -3,6 +3,7 @@ import ColumnsArea from '../components/columns_area';
 
 const mapStateToProps = state => ({
   columns: state.getIn(['settings', 'columns']),
+  isModalOpen: !!state.get('modal').modalType,
 });
 
 export default connect(mapStateToProps, null, null, { withRef: true })(ColumnsArea);
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index a2e908683..71bffdaa6 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1613,6 +1613,10 @@
   justify-content: flex-start;
   overflow-x: auto;
   position: relative;
+
+  &.unscrollable {
+    overflow-x: hidden;
+  }
 }
 
 @media screen and (min-width: 360px) {
diff --git a/app/models/user.rb b/app/models/user.rb
index 855ae908d..65ecb33cd 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -170,6 +170,10 @@ class User < ApplicationRecord
     settings.default_privacy || (account.locked? ? 'private' : 'public')
   end
 
+  def allows_digest_emails?
+    settings.notification_emails['digest']
+  end
+
   def token_for_app(a)
     return nil if a.nil? || a.owner != self
     Doorkeeper::AccessToken
diff --git a/app/services/activitypub/fetch_remote_status_service.rb b/app/services/activitypub/fetch_remote_status_service.rb
index 7649bceca..503c175d8 100644
--- a/app/services/activitypub/fetch_remote_status_service.rb
+++ b/app/services/activitypub/fetch_remote_status_service.rb
@@ -30,7 +30,7 @@ class ActivityPub::FetchRemoteStatusService < BaseService
   end
 
   def actor_id
-    first_of_value(@json['attributedTo'])
+    value_or_id(first_of_value(@json['attributedTo']))
   end
 
   def trustworthy_attribution?(uri, attributed_to)
diff --git a/app/workers/digest_mailer_worker.rb b/app/workers/digest_mailer_worker.rb
index 028db89a9..21f1c357a 100644
--- a/app/workers/digest_mailer_worker.rb
+++ b/app/workers/digest_mailer_worker.rb
@@ -9,7 +9,7 @@ class DigestMailerWorker
 
   def perform(user_id)
     @user = User.find(user_id)
-    deliver_digest if user_receives_digest?
+    deliver_digest if @user.allows_digest_emails?
   end
 
   private
@@ -18,8 +18,4 @@ class DigestMailerWorker
     NotificationMailer.digest(user.account).deliver_now!
     user.touch(:last_emailed_at)
   end
-
-  def user_receives_digest?
-    user.settings.notification_emails['digest']
-  end
 end
diff --git a/app/workers/scheduler/email_scheduler.rb b/app/workers/scheduler/email_scheduler.rb
new file mode 100644
index 000000000..24d0c0ebe
--- /dev/null
+++ b/app/workers/scheduler/email_scheduler.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+require 'sidekiq-scheduler'
+
+class Scheduler::EmailScheduler
+  include Sidekiq::Worker
+
+  def perform
+    eligible_users.find_each do |user|
+      next unless user.allows_digest_emails?
+      DigestMailerWorker.perform_async(user.id)
+    end
+  end
+
+  private
+
+  def eligible_users
+    User.confirmed
+        .joins(:account)
+        .where(accounts: { silenced: false, suspended: false })
+        .where(disabled: false)
+        .where('current_sign_in_at < ?', 20.days.ago)
+        .where('last_emailed_at IS NULL OR last_emailed_at < ?', 20.days.ago)
+  end
+end
diff --git a/config/initializers/suppress_csrf_warnings.rb b/config/initializers/suppress_csrf_warnings.rb
new file mode 100644
index 000000000..410ab585b
--- /dev/null
+++ b/config/initializers/suppress_csrf_warnings.rb
@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+ActionController::Base.log_warning_on_csrf_failure = false
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 2691b9ed9..4fc392434 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -561,12 +561,14 @@ en:
       blackberry: Blackberry
       chrome: Chrome
       edge: Microsoft Edge
+      electron: Electron
       firefox: Firefox
       generic: Unknown browser
       ie: Internet Explorer
       micro_messenger: MicroMessenger
       nokia: Nokia S40 Ovi Browser
       opera: Opera
+      otter: Otter
       phantom_js: PhantomJS
       qq: QQ Browser
       safari: Safari
diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index aa6940e91..ceb015282 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -4,7 +4,7 @@ en:
     hints:
       defaults:
         avatar: PNG, GIF or JPG. At most 2MB. Will be downscaled to 120x120px
-        digest: Sent after a long period of inactivity with a summary of mentions you've received in your absence
+        digest: Only sent after a long period of inactivity and only if you have received any personal messages in your absence
         display_name:
           one: <span class="name-counter">1</span> character left
           other: <span class="name-counter">%{count}</span> characters left
diff --git a/config/sidekiq.yml b/config/sidekiq.yml
index 4c35dcd43..bfe29b8f8 100644
--- a/config/sidekiq.yml
+++ b/config/sidekiq.yml
@@ -27,3 +27,6 @@
   ip_cleanup_scheduler:
     cron: '<%= Random.rand(0..59) %> <%= Random.rand(3..5) %> * * *'
     class: Scheduler::IpCleanupScheduler
+  email_scheduler:
+    cron: '0 10 * * 2'
+    class: Scheduler::EmailScheduler
diff --git a/lib/tasks/mastodon.rake b/lib/tasks/mastodon.rake
index 33969d470..38dbed982 100644
--- a/lib/tasks/mastodon.rake
+++ b/lib/tasks/mastodon.rake
@@ -171,11 +171,10 @@ namespace :mastodon do
   end
 
   namespace :emails do
-    desc 'Send out digest e-mails'
+    desc 'Send out digest e-mails (deprecated)'
     task digest: :environment do
-      User.confirmed.joins(:account).where(accounts: { silenced: false, suspended: false }).where('current_sign_in_at < ?', 20.days.ago).find_each do |user|
-        DigestMailerWorker.perform_async(user.id)
-      end
+      # No-op
+      # This task is now executed via sidekiq-scheduler
     end
   end