Section 86 No action to lie against a person where the fire accidentally begins.C1

And no action, suit or process whatever shall be had, maintained or prosecuted against any person in whose house, chamber, stable, barn or other building, or on whose estate any fire shall, . . . F1 accidentally begin, nor shall any recompence be made by such person for any damage suffered thereby, any law, usage or custom to the contrary notwithstanding; . . . F2 provided that no contract or agreement made between landlord and tenant shall be hereby defeated or made void.