Thunderbird 31.4 For more information, please visit the following pages:ThunderbirdMozilla FoundationGeckoLatest user agents:Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 Lightning/3.3.1Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 Lightning/3.3.2