The Collaborative International Dictionary of English v.0.48:

Firebote \Fire"bote`\, n. (O. Eng. Law)
   An allowance of fuel. See Bote.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

FIREBOTE. Fuel for necessary use; a privilege allowed to tenants to take
necessary wood for fuel.