code: function onLauncherConnect(slaveURL) {
      var browsers = attester.config["run-browser"];
      if (browsers) {
          if (!Array.isArray(browsers)) {
              browsers = [browsers];
          }
          var args = [slaveURL];
          for (var i = 0, l = browsers.length; i < l; i++) {
              var curProcess = spawn(browsers[i], args, {
                  stdio: "pipe"
              });
              curProcess.stdout.pipe(process.stdout);
              curProcess.stderr.pipe(process.stderr);
          }
      }
  }
docs: Generic launcher for browsers specified on the command line. It spawns a child
  process for each path in the configuration