diff --git a/Docker.md b/Docker.md
index f6911811..92c7ef15 100644
--- a/Docker.md
+++ b/Docker.md
@@ -22,9 +22,12 @@ docker-compose run linuxfr.org bin/rails db:setup
 Finally, the environment is ready and you can open [http://dlfp.lo](http://dlfp.lo)
 in your favorite browser.
 
-Note: to be able to access this URL, you'll need to add the line
-`127.0.0.1 dlfp.lo image.dlfp.lo` to the `/etc/hosts` file of your
-machine.
+Note: to be able to access this URL, you'll need to add the following line
+into the `/etc/hosts` file of your machine:
+
+```
+127.0.0.1 dlfp.lo image.dlfp.lo
+```
 
 Personalize configuration
 =========================
@@ -58,7 +61,9 @@ will directly detect changes and apply them on next page reload.
 Furthermore, if you need to access the Rails console, you need a second
 terminal and run:
 
-`docker-compose run linuxfr.org bin/rails console`
+```
+docker-compose run linuxfr.org bin/rails console
+```
 
 Note: currently, we didn't configure rails to show directly the
 `webconsole` in your browser. That's just because of time needed to
@@ -76,7 +81,9 @@ To get help about writing tests, see the
 
 To run tests with Docker environment, you need to use this command:
 
-`docker-compose run linuxfr.org bin/rails test -v`
+```
+docker-compose run linuxfr.org bin/rails test -v
+```
 
 Inspect database schema
 =======================
@@ -84,7 +91,9 @@ Inspect database schema
 In case you need to inspect the database, you need a second terminal
 and run:
 
-`docker-compose run database mysql -hdatabase -ulinuxfr_rails -p linuxfr_rails`
+```
+docker-compose run database mysql -hdatabase -ulinuxfr_rails -p linuxfr_rails
+```
 
 By default, the requested password is the same as the username.
 
@@ -94,12 +103,16 @@ Apply database migrations
 In case you need to apply new database migrations, you need a second
 terminal and run:
 
-`docker-compose run linuxfr.org bin/rails db:migrate`
+```
+docker-compose run linuxfr.org bin/rails db:migrate
+```
 
 If you had issue and want to reset all data in your database system,
 use:
 
-`docker-compose run linuxfr.org bin/rails db:reset`
+```
+docker-compose run linuxfr.org bin/rails db:reset
+```
 
 Services provided by the docker-compose
 =======================================
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index c30eaf55..9f24ee19 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -37,6 +37,7 @@ def seo_filter
     @keywords      = %w(Linux Logiciel Libre GNU Free Software Actualité Forum Communauté)
     @description   = "L’actualité du logiciel libre et des sujets voisins (DIY, Open Hardware, Open Data, les Communs, etc.), sur un site francophone contributif géré par une équipe bénévole par et pour des libristes enthousiastes"
     @feeds         = {}
+    @links         = {}
     @last_comments = Comment.footer
     @popular_tags  = Tag.footer
     @friend_sites  = FriendSite.select([:url, :title])
@@ -56,7 +57,7 @@ def configure_permitted_parameters
       :sort_by_date_on_home, :hide_signature, :show_negative_nodes,
       :totoz_style, :totoz_source,
       :board_in_sidebar,
-      user_attributes: [:id, :name, :homesite, :jabber_id, :signature, :avatar, :custom_avatar_url]
+      user_attributes: [:id, :name, :homesite, :jabber_id, :mastodon_url, :signature, :avatar, :custom_avatar_url]
     ])
   end
 
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index e7a72782..5deff935 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -16,6 +16,10 @@ def feed(title, link=nil)
     @feeds[link] = title
   end
 
+  def link(rel, link)
+    @links[link] = rel
+  end
+
   def meta_for(content)
     @author      = content.node.user.try(:name)
     @keywords    = content.node.popular_tags.map &:name
diff --git a/app/helpers/node_helper.rb b/app/helpers/node_helper.rb
index dc2e7208..d0750c78 100644
--- a/app/helpers/node_helper.rb
+++ b/app/helpers/node_helper.rb
@@ -111,6 +111,7 @@ def posted_by(content, user_link='Anonyme')
       user_infos = []
       user_infos << homesite_link(user)
       user_infos << jabber_link(user)
+      user_infos << mastodon_link(user)
       user_infos.compact!
       user_link += (" (" + user_infos.join(', ') + ")").html_safe  if user_infos.any?
     end
diff --git a/app/helpers/users_helper.rb b/app/helpers/users_helper.rb
index 51c74401..5aaf8b3f 100644
--- a/app/helpers/users_helper.rb
+++ b/app/helpers/users_helper.rb
@@ -40,4 +40,8 @@ def jabber_link(user)
     link_to("adresse XMPP", "xmpp:" + user.jabber_id)
   end
 
+  def mastodon_link(user)
+    return if user.mastodon_url.blank?
+    link_to("Mastodon", user.mastodon_url)
+  end
 end
diff --git a/app/models/statistics/users.rb b/app/models/statistics/users.rb
index c60290bc..c3f428a6 100644
--- a/app/models/statistics/users.rb
+++ b/app/models/statistics/users.rb
@@ -109,4 +109,9 @@ def top_email_domains
   def top_xmpp_domains
     select_all "SELECT SUBSTRING_INDEX(jabber_id,'@', -1) AS domain, COUNT(*) AS cnt FROM accounts LEFT JOIN users ON accounts.user_id=users.id WHERE jabber_id LIKE '%@%' AND current_sign_in_at > DATE_SUB(CURDATE(),INTERVAL 90 DAY) AND role<>'inactive' GROUP BY domain HAVING cnt > 3 ORDER BY cnt DESC LIMIT 10;"
   end
+
+  def top_mastodon_domains
+    # We assume Mastodon URLs will always start with "https://"
+    select_all "SELECT SUBSTRING_INDEX(SUBSTRING(mastodon_url, 9),'/', 1) AS domain, COUNT(*) AS cnt FROM accounts LEFT JOIN users ON accounts.user_id=users.id WHERE mastodon_url LIKE 'https://%/%' AND current_sign_in_at > DATE_SUB(CURDATE(),INTERVAL 90 DAY) AND role<>'inactive' GROUP BY domain HAVING cnt > 3 ORDER BY cnt DESC LIMIT 10;"
+  end
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 9ab3be24..de72766e 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -7,6 +7,7 @@
 #  name              :string(40)
 #  homesite          :string(100)
 #  jabber_id         :string(32)
+#  mastodon_url      :string(100)
 #  cached_slug       :string(32)       not null
 #  created_at        :datetime
 #  updated_at        :datetime
@@ -33,6 +34,8 @@ class User < ActiveRecord::Base
   validates :homesite, length: { maximum: 100, message: "L’adresse du site Web personnel est trop longue" }
   validates :name, length: { maximum: 40, message: "Le nom affiché est trop long" }
   validates :jabber_id, length: { maximum: 32, message: "L’adresse XMPP est trop longue" }
+  validates :mastodon_url, http_url: { protocols: ["https"], message: "L’adresse du compte Mastodon n’est pas valide" },
+                           length: { maximum: 255, message: "L’adresse du compte Mastodon est trop longue" }
   validates :signature, length: { maximum: 255, message: "La signature est trop longue" }
   validates :custom_avatar_url, length: { maximum: 255, message: "L’adresse de l’avatar est trop longue" }
 
diff --git a/app/views/devise/registrations/_preferences.html.haml b/app/views/devise/registrations/_preferences.html.haml
index b10ee0d8..e1121c00 100644
--- a/app/views/devise/registrations/_preferences.html.haml
+++ b/app/views/devise/registrations/_preferences.html.haml
@@ -11,6 +11,12 @@
       = u.label :jabber_id, 'Adresse XMPP'
       %span.prefix xmpp:
       = u.text_field :jabber_id, placeholder: "me@example.net", maxlength: 32
+    %p
+      = u.label :mastodon_url, 'Adresse du compte Mastodon'
+      = u.url_field :mastodon_url, placeholder: "https://mastodon.example/@me", maxlength: 255
+      %span.help
+        Après avoir enregistré l’adresse de votre compte Mastodon, vous pourrez utiliser le lien <kbd>https://linuxfr.org/users/#{current_user.login}</kbd> pour
+        <a href="https://docs.joinmastodon.org/user/profile/#verification">prouver que le compte Mastodon et le compte LinuxFr.org appartiennent à la même personne.</a>
     %p
       = u.label :signature, "Signature"
       = u.text_field :signature, maxlength: 250, size: 100
diff --git a/app/views/layouts/_head.html.haml b/app/views/layouts/_head.html.haml
index 191b7bcf..b7883760 100644
--- a/app/views/layouts/_head.html.haml
+++ b/app/views/layouts/_head.html.haml
@@ -18,3 +18,5 @@
     %meta(name="robots" content="noindex, nofollow")
   - @feeds.each do |link,title|
     = auto_discovery_link_tag :atom, link, { title: title }
+  - @links.each do |link,rel|
+    %link(rel=rel href=link)
diff --git a/app/views/statistics/users.html.haml b/app/views/statistics/users.html.haml
index 866806d8..fe0a6f0f 100644
--- a/app/views/statistics/users.html.haml
+++ b/app/views/statistics/users.html.haml
@@ -19,6 +19,7 @@
       %li= link_to("Informations personnelles", "#stats_infosperso")
       %li= link_to("Domaines des courriels", "#stats_courriel")
       %li= link_to("Domaines XMPP", "#stats_xmpp")
+      %li= link_to("Domaines Mastodon", "#stats_mastodon")
       %li= link_to("Utilisation des fonctionnalités", "#stats_fonctionnalites")
       %li= link_to("Style (CSS)", "#stats_css")
       %li= link_to("Karmas des utilisatrices et utilisateurs", "#stats_karma")
@@ -252,6 +253,24 @@
         %td
           #{@stats.pctrecent(domain["cnt"])}
 
+  %h2#stats_mastodon Domaines Mastodon
+  %p
+    Sur #{pluralize @stats.nb_recently_used_accounts, "compte valide et utilisé", "comptes valides et utilisés"} au cours des trois derniers mois :
+  %table
+    - maxval = @stats.nb_recently_used_accounts
+    %tr
+      %th Domaines à plus de trois comptes
+      %th Nombre de comptes
+      %th Actifs
+    - @stats.top_mastodon_domains.each do |domain|
+      %tr
+        %td.stat
+          = domain["domain"]
+        %td
+          .stat.misc(style="width: #{(width_stats * domain["cnt"] / maxval).to_i}px;")= domain["cnt"]
+        %td
+          #{@stats.pctrecent(domain["cnt"])}
+
   %h2#stats_fonctionnalites Utilisation des fonctionnalités
   %p
     Sur #{pluralize @stats.nb_recently_used_accounts, "compte valide et utilisé", "comptes valides"} au cours des trois derniers mois :
diff --git a/app/views/users/show.html.haml b/app/views/users/show.html.haml
index 815a1273..afc0ac4e 100644
--- a/app/views/users/show.html.haml
+++ b/app/views/users/show.html.haml
@@ -4,5 +4,7 @@
 
 =h1 "#{@user.name} a écrit #{pluralize @nodes.total_count, "contenu"} de type dépêche ou journal"
 - feed "Flux Atom de #{@user.name}", "/users/#{@user.to_param}.atom"
+- if @user.mastodon_url
+  - link "me", @user.mastodon_url
 - filter_pagination_params ['id', 'order', 'page']
 = paginated_nodes @nodes
diff --git a/db/migrate/20221219214058_add_mastodon_url_to_users.rb b/db/migrate/20221219214058_add_mastodon_url_to_users.rb
new file mode 100644
index 00000000..e6a4491c
--- /dev/null
+++ b/db/migrate/20221219214058_add_mastodon_url_to_users.rb
@@ -0,0 +1,5 @@
+class AddMastodonUrlToUsers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :users, :mastodon_url, :string
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index ac491522..3626e76c 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: 2021_01_31_231806) do
+ActiveRecord::Schema.define(version: 2022_12_19_214058) do
 
   create_table "accounts", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci", force: :cascade do |t|
     t.integer "user_id"
@@ -373,6 +373,7 @@
     t.string "avatar"
     t.string "signature"
     t.string "custom_avatar_url"
+    t.string "mastodon_url"
     t.index ["cached_slug"], name: "index_users_on_cached_slug"
   end