diff --git a/.ansible/roles/linux_desktop/tasks/firefox.yaml b/.ansible/roles/linux_desktop/tasks/firefox.yaml
new file mode 100644
index 0000000..ff182ca
--- /dev/null
+++ b/.ansible/roles/linux_desktop/tasks/firefox.yaml
@@ -0,0 +1,34 @@
+- name: 'Firefox: Set base path'
+  tags:
+    - config
+    - firefox
+  set_fact:
+    firefox_path: '~/.mozilla/firefox'
+
+- name: 'Firefox: Discover profile path'
+  tags:
+    - config
+    - firefox
+  set_fact:
+    profile_path: "{{ firefox_path }}/{{ lookup('ini', 'Path section=Profile0 file=' + firefox_path + '/profiles.ini') }}"
+
+- name: 'Firefox: Lockdown config (relaxed)'
+  tags:
+    - config
+    - firefox
+  block:
+    - name: 'Firefox: Download config'
+      get_url:
+        url: 'https://raw.githubusercontent.com/pyllyukko/user.js/relaxed/user.js'
+        dest: "{{ profile_path }}/user.js-lockdown"
+        mode: '0600'
+        force: yes
+        backup: yes
+
+    - name: 'Firefox: Replace user.js'
+      copy:
+        src: "{{ profile_path }}/user.js-lockdown"
+        dest: "{{ profile_path }}/user.js"
+        mode: '0600'
+        force: yes
+        backup: yes
diff --git a/.ansible/roles/linux_desktop/tasks/main.yaml b/.ansible/roles/linux_desktop/tasks/main.yaml
index bcdf3f7..e43fe9c 100644
--- a/.ansible/roles/linux_desktop/tasks/main.yaml
+++ b/.ansible/roles/linux_desktop/tasks/main.yaml
@@ -1,3 +1,4 @@
 - name: Linux desktop tasks
   import_tasks: software.yaml
 - import_tasks: config.yaml
+- import_tasks: firefox.yaml