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 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0 WhiteHat Security
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (Windows NT 10.0; rv:54.0 ) Gecko/20100101 Firefox/54.0 anonymized by Abelssoft 1550774185
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.5) Gecko/2008122120 Gentoo Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; ja; rv:1.8.1.3) Gecko/20070309 Firefox/54.0
• Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 MRA 5.5 (build 02842) Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.19) Gecko/20081216 Fedora/2.0.0.19-1.fc8 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0 Admin/5.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.11) Gecko/2009060310 Linux Mint/6 (Felicia) Firefox/54.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.2.9) Gecko/20100913 Firefox/54.0
• Mozilla/5.0 (Windows NT 10.0; Win64; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090716 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.2; rv:54.0.1) Gecko/20100101 Firefox/54.0.1 anonymized by Abelssoft 1459818465
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:64.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.3) Gecko/20090919 Firefox/54.0
• Mozilla/5.0 (masking-agent; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; pt-BR; rv:1.8) Gecko/20051111 Firefox/54.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0,gzip(gfe)
• Mozilla/5.0 (X11; U; Linux i686; pl; rv:1.8.0.4) Gecko/20060527 SUSE/1.5.0.4-1.7 Firefox/54.0
• Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0 Lightning/5.4
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.6) Gecko/20100628 Ubuntu/10.04 (lucid) Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.8) Gecko/2009040312 Gentoo Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; it; rv:1.9) Gecko/2008061017 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.8.1.12) Gecko/20080203 SUSE/2.0.0.12-6.1 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; tr-TR; rv:1.9b5) Gecko/2008032600 SUSE/2.9.95-25.1 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0; rv:11.0) like Gecko
• Mozilla/5.0 (Windows; U; Windows NT 6.1; ja; rv:1.9.2.4) Gecko/20100611 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1.16) Gecko/20080718 Ubuntu/8.04 (hardy) Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9b4) Gecko/2008040813 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; sv-SE; rv:1.9.0.3) Gecko/2008092510 Ubuntu/8.04 (hardy) Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.11) Gecko/2009060308 Linux Mint/7 (Gloria) Firefox/54.0
• Mozilla/5.0 (Windows NT 6.2; rv:54.0) Gecko/20100101 Firefox/54.0 anonymized by Abelssoft 1445468492
• Mozilla/5.0 (X11; U; OpenBSD amd64; en-US; rv:1.8.1.6) Gecko/20070817 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.2; rv:54.0 () Gecko/20100101 Firefox/54.0 ( anonymized by Abelssoft 703472755
• Mozilla/5.0 (Windows NT 6.3; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.8) Gecko/20051111 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; WOW64) Gecko/ Chrome/54.0.1.1 Safari/537.37
• Mozilla/5.0 (X11; Linux x86_64) Gecko/ Firefox/54.0.2
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0.1) Gecko/20100101 Firefox/54.0.1
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0 Lightning/5.8.1
• Mozilla/5.0 (X11; Linux i686; rv:54.0) Gecko/20100101 Firefox/54.0,gzip(gfe)
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) Gecko/20100101 Chrome/54.0.1.1 Safari/537.37
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:54.0) Gecko/20170101 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; rv:54.0) Gecko/20100101 Firefox/54.0 anonymized by Abelssoft 1365233223
• Mozilla/5.0 (Android 4.4.4; Tablet; rv:54.0.1) Gecko/54.0.1 Firefox/54.0.1
• Mozilla/5.0 (X11; U; OpenBSD i386; en-US; rv:1.8.1.6) Gecko/20070819 Firefox/54.0
• Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2b5) Gecko/20091204 Firefox/54.0
• Mozilla/5.0 (Android 4.0.3; Mobile; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Android 4.4.4; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0 [ip:93.44.81.56]
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0; .NET CLR 4.0.30319; ffco7) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; nl; rv:1.9.1.1) Gecko/20090715 Firefox/54.0
• Mozilla/5.0 (Android 7.0; Mobile; HUAWEI H1711 Build/HuaweiH1711; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; fr; rv:1.9.0.14) Gecko/2009090216 Ubuntu/8.04 (hardy) Firefox/54.0
• Mozilla/5.0 (Android 4.2.2; Mobile; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Antidetect/54.0.1
• Mozilla/5.0 (Linux; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0 O/4127B6EE3
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050715 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.3; rv:54.0.1.0) Gecko/20100101 Firefox/54.0.1.0
• Mozilla/5.0 (Windows NT 6.1; rv:54.0.1.0) Gecko/20100101 Firefox/54.0.1.0
• Mozilla/5.0 (Android 8.1.0; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Android 4.0.4; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; rv:54.0) Gecko/20100101 Firefox/54.0 anonymized by Abelssoft 1754126529
• Mozilla/5.0 (X11; U; Linux i686; es-ES; rv:1.9.1.6) Gecko/20091201 SUSE/3.5.6-1.1.1 Firefox/54.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1b1) Gecko/20060710 Firefox/54.0
• Mozilla/5.0 (Windows; U; Windows NT 6.1; en; rv:1.9.1.3) Gecko/20090824 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.2; rv:54.0.1) Gecko/20100101 Firefox/54.0.1 anonymized by Abelssoft 830219350
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:54.0) Gecko/20160101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.8.1.10) Gecko/20071015 SUSE/2.0.0.10-0.1 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; ja; rv:1.8.0.10) Gecko/20070510 Fedora/1.5.0.10-6.fc6 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; pl-PL; rv:1.9.0.1) Gecko/2008071222 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.10) Gecko/20060601 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux x86_64; it; rv:1.9.0.3) Gecko/2008092510 Ubuntu/8.04 (hardy) Firefox/54.0
• Mozilla/5.0 (Android 7.1.1; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.6) Gecko/20060728 SUSE/1.5.0.6-0.1 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1) Gecko/20100101 Firefox/54.0 Lightning/5.8.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0.1.0) Gecko/20100101 Firefox/54.0.1.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:54.0.1.0) Gecko/20100101 Firefox/54.0.1.0
• Mozilla/5.0 (X11; U; Linux x86_64; it; rv:1.8.1.2) Gecko/20060601 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:54.0.1.0) Gecko/20100101 Firefox/54.0.1.0
• Mozilla/5.0 (X11; Linux i686 on x86_64; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.9) Gecko/20070102 Ubuntu/dapper-security Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (Android 9; Mobile; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.4) Gecko/20070531 Firefox/54.0
• Mozilla/5.0 (X11; FreeBSD amd64; rv:54.0) Gecko/20100101 Firefox/54.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0,gzip(gfe)
• Mozilla/5.0 (Android 5.1.1; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Android 5.0.1; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Android 7.1.2; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0
• Mozilla/5.0 (Android 5.0.2; Tablet; rv:54.0) Gecko/54.0 Firefox/54.0