Involved in degradation of plant cell walls. Hydrolyzes of the feruloyl-arabinose ester bond in arabinoxylans as well as the feruloyl-galactose and feruloyl-arabinose ester bonds in pectin. feruloyl-polysaccharide + H2O = ferulate + polysaccharide. Inhibited by the specific serine esterase inhibitor AEBSF. Component of the multienzyme cellulase-hemicellulase complex.