For more information, please visit the following pages:

• Firefox
• Mozilla Foundation
• Gecko

Latest user agents (if you are looking for complete list, download it here):

• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0@a06581d0-ae5d-4ca2-be73-e9cb4372bdfe
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20120101 Firefox/43.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0 Light/43.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0 Framafox/43.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 9_6_7; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 207711165
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 1012130791
• Mozilla/5.0 (Android 6.0; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 1153059246
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.3; Win64; x64) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Linux x86_64) Gecko/20100101 Firefox/43.0.2
• Mozilla/5.0 (Windows NT 6.1; WOW64) Gecko/20100101 Chrome/43.0.1.1 Safari/537.37
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 1244014966
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) Gecko/ Firefox/43.0.2
• Mozilla/5.0 (X11; Linux x86_64) Gecko/ Firefox/43.0.2
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 571534047
• Mozilla/5.0 (Windows NT 6.2; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 616146556
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 7.0; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 4.1.2; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.1; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.1; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.0.2; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 4.2.1; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.0.2; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.0; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.1; rv:44.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; rv:44.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 4.4.2; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.1; rv:43.0) Gecko/20100101 Firefox/43.0 Lightning/5.4
• Mozilla/5.0 (Windows NT 10.0; rv:43.0) Gecko/20100101 Firefox/43.0 anonymized by Abelssoft 1085275131
• Mozilla/5.0 (Android 4.2.2; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (X11; Fedora; Linux i686; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; rv:43.0.4) Gecko/20100101 Firefox/43.0.4 anonymized by Abelssoft 1058474004
• Mozilla/5.0 (Windows NT 6.0; rv:43.0) Gecko/20100101 Firefox/43.0,gzip(gfe)
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; rv:40.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; FreeBSD i386; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; Tablet PC 2.0; InfoPath.3)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; HRTS; MS-RTC LM 8)
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; Tablet PC 2.0; InfoPath.3)
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; SLCC2; Media Center PC 6.0)
• Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20130724 Firefox/43.0
• Mozilla/5.0 (X11; OpenBSD amd64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0 AlexaToolbar/alxf-2.19
• Mozilla/5.0 (Windows NT 6.1; rv:43.0.1) Gecko/20100101 Firefox/43.0.1 anonymized by Abelssoft 1161880879
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0; WUID=192493a913159dacc57b91f771aa4986; WTB=2958) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0; WUID=f8433ca18810ba4790a251fee5e19295; WTB=592) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; NetBSD amd64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 4.4; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.0; rv:43.0; WUID=bfb2a1a5678278d3f459fde9256f9063; WTB=18144) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 4.4.2; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 4.0.4; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; de; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.0; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0 FirePHP/0.7.4
• Mozilla/5.0 (Android 5.0.1; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 4.4.4; Tablet; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 6.0.1; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Android 5.1.1; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (X11; FreeBSD amd64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Android 4.4; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Mobile; OPENC; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.1; rv:43.0) Gecko/20100101 Firefox/43.0,gzip(gfe)
• Mozilla/5.0 (Android 4.2.2; Mobile; rv:43.0) Gecko/43.0 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.2; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0;Macintosh; Intel Mac OS X 10_13_3) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0,gzip(gfe)
• Mozilla/5.0 (Windows NT 6.2; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.1; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Linux i686; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.2; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.0; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.3; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 10.0; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 5.1; rv:43.0) Gecko/20100101 Firefox/43.0
• Mozilla/5.0 (Windows NT 6.1; rv:43.0) Gecko/20100101 Firefox/43.0