All municipal firefighters, full paid or volunteer, attending and serving at fires or doing fire prevention work or rescue, resuscitation, first aid, inspection or any other official work outside the corporate limits of a municipality as provided in Sections 29-105 through 29-108 of this title shall be considered as serving in their regular line of duty as full as if they were serving within the corporate limits of their own municipality; but full paid firefighters shall receive no additional compensation, and volunteer firefighters shall receive only such compensation as may be provided for by ordinance or resolution for such cases. All such firefighters shall be entitled to all the benefits of any pension fund, firemen's relief and pension fund in the same manner as if the fire fighting or fire prevention work or rescue, resuscitation, first aid, inspection or any other official work has been within the corporate limits of the municipality.