function checkBrowsers() {
    return (
      // Well-known, well-used
      // Special Notes:
      // (1) Opera must be checked before FireFox due to the odd
      //     user agents used in some older versions of Opera
      // (2) WebTV is strapped onto Internet Explorer so we must
      //     check for WebTV before IE
      // (3) (deprecated) Galeon is based on Firefox and needs to be
      //     tested before Firefox is tested
      // (4) OmniWeb is based on Safari so OmniWeb check must occur
      //     before Safari
      // (5) Netscape 9+ is based on Firefox so Netscape checks
      //     before FireFox are necessary
      $this->checkBrowserWebTv() ||
      $this->checkBrowserInternetExplorer() ||
      $this->checkBrowserOpera() ||
      $this->checkBrowserGaleon() ||
      $this->checkBrowserNetscapeNavigator9Plus() ||
      $this->checkBrowserFirefox() ||
      $this->checkBrowserChrome() ||
      $this->checkBrowserOmniWeb() ||

      // Common mobile
      $this->checkBrowserAndroid() ||
      $this->checkBrowseriPad() ||
      $this->checkBrowseriPod() ||
      $this->checkBrowseriPhone() ||
      $this->checkBrowserBlackBerry() ||
      $this->checkBrowserNokia() ||

      // Common bots
      $this->checkBrowserGoogleBot() ||
      $this->checkBrowserMSNBot() ||
      $this->checkBrowserSlurp() ||

      // WebKit base check (post mobile and others)
      $this->checkBrowserSafari() ||

      // Everyone else
      $this->checkBrowserNetPositive() ||
      $this->checkBrowserFirebird() ||
      $this->checkBrowserKonqueror() ||
      $this->checkBrowserIcab() ||
      $this->checkBrowserPhoenix() ||
      $this->checkBrowserAmaya() ||
      $this->checkBrowserLynx() ||

      $this->checkBrowserShiretoko() ||
      $this->checkBrowserIceCat() ||
      $this->checkBrowserW3CValidator() ||
      $this->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */
    );
  }