To add in lib/moodlelib.php, function check_browser_version:

case 'MSIE':   /// Internet Explorer
    ...
    if ($string[0] == $brand and (float)$string[1] >= $version ) {
        return true;
    }
    // start new code
    if (preg_match("/Trident\/[0-9\.]+/", $agent) && preg_match("/rv:([0-9\.]+)/", $agent, $match)) {
        return true;
    }
    // end new code
    break;
case 'Opera':  /// Opera
...