All Fire Dozers should be equipped with fire curtains.  This picture shows the fire curtains on a enclosed cab dozer when their rolled up, not in use.
Here, the fire curtains have been deployed.  The velcro tabs are pulled to unroll the curtains down. With the curtains down, the reflective material will reflect the radiant heat to help protect the operator and swamper from the intense heat of the fireline. The curtains are often used when constructing direct line on the fires edge.