Preheat oven to 375 degrees. In a food processor fitted with the metal blade, pulse the graham crackers until finely ground, add sugar and salt. In a small saucepan over medium-low heat, melt the butter. Cook the butter, stirring occasionally until the milk solids turn lightly browned and the butter smells nutty, about 7-10 minutes. Let the butter cool slightly, then combine graham cracker crumbs and process until thoroughly blended. Press the mixture into a 9 inch pie plate. Bake 10 minutes, cool before filling.