docs: function getYandexExe(yandexDirName) {
    // TODO (rachel.satoyama): fix windows
    if (process.platform !== 'win32') {
      return null;
    }
    var windowsYandexDirectory, i, prefix;
    var suffix = '\\Yandex\\'+ yandexDirName + '\\Application\\browser.exe';
    var prefixes = [process.env.LOCALAPPDATA, process.env.PROGRAMFILES, process.env['PROGRAMFILES(X86)']];
  
    for (i = 0; i < prefixes.length; i++) {
      prefix = prefixes[i];
      if (fs.existsSync(prefix + suffix)) {
        windowsYandexDirectory = prefix + suffix;
        break;
      }
    }
  
    return windowsYandexDirectory;
  }