Make the crust: Melt the butter in heavy small saucepan over medium heat. Continue to cook, stirring occasionally until butter turns golden brown (nut colored), about 4 minutes (do not burn.) Pour the butter into a small bowl and freeze until firm, about 15 minutes.
Butter a 9-inch (not deep dish) pie pan lightly with butter. Combine the flour, sugar and salt in the bowl of the food processor. Cut the frozen butter into quarters and add it to the flour mixture; process until mixture resembles moist sand. Add the water and process just until moist clump form. Using fingertips, press the dough evenly onto bottom and up sides of prepared pan. Crimp the edges decoratively if desired.
Make the Filling: Melt Butter in heavy small saucepan over medium heat. Continue to cook, stirring occasionally until butter turns golden brown (nut colored), about 4 minutes (do not burn.) Remove from heat and let stand until cooled but not set, about 10 minutes.
Position the rack in the bottom third of the oven and preheat to 375°F. Whisk the eggs, brown sugar, and salt until well blended in a medium bowl. Stir in both syrups, cream and browned butter. Mix in the pecans. Pour the mixture into an unbaked piecrust. Bake until the crust is golden brown and the filling is set, about 35 minutes. Cool completely. (Pie can be made 1 day ahead. Cover loosely and store at cool room temperature.)