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 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 AtContent/97.5.8474.75
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 Config/91.2.2591.18
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:200.2.126.198]
• Mozilla/5.0 (X11; Linux i686 on x86_64; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_6; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:79.51.196.45]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:79.51.187.114]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:82.53.137.167]
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:91.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20190101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0 sape) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Waterfox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0;secssobrowser) Gecko/20100101 Firefox/56.0
• Mozilla/4.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 bb-mozilla-auto-config host:i4vo
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; en:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.3; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:55.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; W\xE2\x80\xA6) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Android 5.0.2; Tablet; rv:56.0) Gecko/56.0 Firefox/56.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.0; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (compatible; MMozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:73.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 10.0; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 10.0; rv:56.0 ) Gecko/20100101 Firefox/56.0 anonymized by Abelssoft 261145307
• Mozilla/5.0 (Windows NT 10.0; rv:56.0 ) Gecko/20100101 Firefox/56.0 anonymized by Abelssoft 889013718
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0/GWUA
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20170401 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; rv:56.0 ) Gecko/20100101 Firefox/56.0 anonymized by Abelssoft 1024581946
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0/DetA7Yg5-57
• Mozilla/5.0 (Windows NT 6.2; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 Build 20180902143701
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 6.1; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 6.2; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0.2) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0.1) Gecko/20100101 Firefox/56.0.1
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20160101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20180101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.2; rv:56.0.2) Gecko/20100101 Firefox/56.0.2 anonymized by Abelssoft 232613475
• Mozilla/5.0 (Windows NT 10.0; rv:56.0 ) Gecko/20100101 Firefox/56.0 anonymized by Abelssoft 824859124
• Mozilla/5.0 (Windows NT 6.2; rv:56.0.2) Gecko/20100101 Firefox/56.0.2 anonymized by Abelssoft 2014542535
• Mozilla/5.0 (X11; Ubuntu; Linux) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 MicroAdBot/1.1 (https://www.microad.co.jp/contact/)
• Mozilla/5.0 (Android 10; Mobile; rv:56.0) Gecko/56.0 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:213.32.4.211]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:213.32.4.247]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:93.151.236.95]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:213.32.4.224]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 sibvaleo-developer
• Mozilla/5.0 (X11; Fedora; Linux i686; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:82.52.126.104]
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 artena programmer
• Mozilla/5.0 (X11; OpenBSD amd64; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:87.2.122.84]
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:195.62.169.125]
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:56.0.4) Gecko/20100101 Firefox/56.0.4
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:56.0) Gecko/20100101 D2mgqVeU-16 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 X5Dwdu8t-35 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:137.204.150.14]
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:93.146.168.94]
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:56.0.1.0) Gecko/20100101 Firefox/56.0.1.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:185.158.115.244]
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:2.44.141.17]
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [ip:93.65.244.165]
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0;secssobrowser) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; v:56.0) Gecko/20100101 Firefox/56.0 Waterfox 56.3
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 MicroAdBot/1.1 (https://www.microad.co.jp/contact/)
• Mozilla/5.0 (Windows; Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:56.0.1.0) Gecko/20100101 Firefox/56.0.1.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0.2.0) Gecko/20100101 Firefox/56.0.2.0
• Mozilla/5.0 (Windows; Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0.1.0) Gecko/20100101 Firefox/56.0.1.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 0x4C6F526F
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/56.0.2 (x86 de) Anonymisiert durch AlMiSoft Browser-Anonymisierer 49437001
• Mozilla/5.0 (Android 4.4.4; Tablet; rv:56.0) Gecko/56.0 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 RPV48psk-10 yYg7iyod-29 yYg7iyod-29 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 RPV48psk-10 yYg7iyod-29 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.00000
• Mozilla/5.0 (Android 8.1; Tablet; rv:56.0) Gecko/56.0 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 viUks7laZ5
• Mozilla/5.0 (masking-agent; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:56.0) Gecko sape /20100101 Firefox/56.0
• Mozilla/5.0 (X11; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0 cuir--bugbounty-CNP-155011
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0; .NET CLR 4.0.30319; ffco7) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [[Firefox]] Lightning/5.8.1
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 [[Firefox]]
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Windows NT 6.1; rv:56.0.2.0) Gecko/20100101 Firefox/56.0.2.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0.2
• Mozilla/5.0 (Windows NT 6.2; rv:56.0 ) Gecko/20100101 Firefox/56.0 anonymized by Abelssoft 1406216210
• Mozilla/5.0 (Android 8.0; Mobile; rv:56.0) Gecko/20100101 Firefox/56.0
• Mozilla/5.0 (Android 8.0; Tablet; rv:56.0) Gecko/20100101 Firefox/56.0