always download latest extension version

packer/ansible/playbook.yml

@@ -47,10 +47,8 @@
       language_packs:
         - de
       extensions:
-        - id: uBlock0@raymondhill.net
-          url: https://addons.mozilla.org/firefox/downloads/file/1114441/ublock_origin-1.17.2-an+fx.xpi
-        - id: https-everywhere@eff.org
-          url: https://addons.mozilla.org/firefox/downloads/file/1082984/https_everywhere-2018.9.19-an+fx.xpi
+        - uBlock0@raymondhill.net
+        - https-everywhere@eff.org
     debian_sections:
       - main
       - contrib

packer/ansible/roles/firefox/tasks/extensions.yml

@@ -1,6 +1,15 @@
 ---
-- name: install firefox extensions
-  get_url:
-    url: "{{ item.url }}"
-    dest: "/usr/lib/firefox-esr/browser/extensions/{{ item.id }}.xpi"
+- name: get extensions info
+  uri:
+    url: "https://addons.mozilla.org/api/v4/addons/addon/{{ item }}/"
+    return_content: yes
+  register: extension_infos
   loop: "{{ firefox.extensions }}"
+
+- name: install extensions
+  get_url:
+    url: "{{ item.json.current_version.files[0].url }}"
+    dest: "/usr/lib/firefox-esr/browser/extensions/{{ item.item }}.xpi"
+  loop: "{{ extension_infos.results }}"
+  loop_control:
+    label: "{{ item.url }}"