Thunderbird 38.0 For more information, please visit the following pages:ThunderbirdMozilla FoundationGeckoLatest user agents:Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 Lightning/4.0.5.2