Roll back Firefox to 42

playbooks/roles/browsers/defaults/main.yml

 browser_deb_pkgs:
     - dbus-x11
-    - firefox=45.0.2+build1-0ubuntu1
+    - gdebi
     - google-chrome-stable
     - libcurl3
     - libgconf2-4
@@ -9,6 +9,13 @@ browser_deb_pkgs:
     - xdg-utils
     - xvfb
 
+# Firefox
+browser_custom_deb_pkgs:
+    - {
+         name: "firefox_42.0+build2-0ubuntu1_amd64.deb",
+         url: "http://launchpadlibrarian.net/223743022/firefox_42.0+build2-0ubuntu1_amd64.deb" 
+      }
+
 # Chrome and ChromeDriver
 chrome_repo: "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main"
 chromedriver_version: 2.25

playbooks/roles/browsers/tasks/main.yml

@@ -15,6 +15,16 @@
   apt: pkg={{','.join(browser_deb_pkgs)}}
        state=present update_cache=yes
 
+- name: download browser debian packages
+  get_url: dest="/tmp/{{ item.name }}" url="{{ item.url }}"
+  register: download_deb
+  with_items: browser_custom_deb_pkgs
+
+- name: install browser debian packages
+  shell: gdebi -nq /tmp/{{ item.name }}
+  when: download_deb.changed
+  with_items: browser_custom_deb_pkgs
+
 - name: download ChromeDriver
   get_url:
     url={{ chromedriver_url }}