Force Mode to recreate the firefox-config-directory

[whotwagner]

If you modify the bookmarks after a deployment, those modifications won't show up in the firefox-browser. It is neccessary to delete the firefox_config_dir and recreate it using the following existing task(in https://github.com/ait-cs-IaaS/ansible-firefox-autoconfig/blob/master/tasks/main.yml ):

- name:  Create firefox config directory in user home
  become: yes
  file:
    path: "{{ firefox_config_dir }}"
    state: directory
    mode: 0755
    owner: "{{ firefox_user }}"
    group: "{{ firefox_user }}"
  tags: [config]

I would suggest to create a variable "firefox_config_force" that deletes the firefox_config_dir before every run.