MD5 (xpi/stumbleupon-3.52-fx+sm+mz.xpi) = 81d194944dabb88335515eed5e2aedcd
SHA256 (xpi/stumbleupon-3.52-fx+sm+mz.xpi) = 452d5cad3dbdef357dbe676b7731366d07fdeff473dcdacffaeddd8701b1a8b9
SIZE (xpi/stumbleupon-3.52-fx+sm+mz.xpi) = 309555