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 5.1; rv:25.0) Gecko/20100101 Firefox/25.0 [ip:46.44.230.214]
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20191118 Firefox/25.0
• Mozilla/5.0 (Linux x86_64; X11) Gecko/20061008 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.3; WOW64) Gecko/20072105 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_4) Gecko/20032609 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 9_6_1; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 8_6_8; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Android; Tablet; Concierge; rv:25.0) Gecko/25.0 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130712 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 AlexaToolbar/psai366f-2.1
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:25.0) Gecko/20141005 PaleMoon/25.0.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0; WUID=c4656e4e8e29ca2bc6fc0bdea2d8c4cd; WTB=6533) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Linux x86_64; X11) Gecko/20010109 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130704 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; WOW64) Gecko/20211503 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:25.0) Gecko/20130715 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0; WUID=00f3c0a86da88686f7d93c4061cdfa0e; WTB=8679) Gecko/20100101 Firefox/25.0
• Firefox 25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 11_8_0) Gecko/20113003 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130704 Firefox/25.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:25.0) Gecko/20100101 Firefox/25.0 (via de.motortalk.utils.HttpUtils)
• Mozilla/5.0 (X11; Linux armv7l; rv:25.0) Gecko/20130329 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; rv:20.0) Gecko/20121202 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20100101 (C2FDB213-894B-590F-7BAC-DEF79E94FE3A) Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20100101 Firefox/25.0 AlexaToolbar/alxf-2.19
• Mozilla/5.0 (X11; Linux armv7l; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:25.0) Gecko/20141005 PaleMoon/25.0.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0; WUID=2b3543395409b9fba5dd27f40abdaa10; WTB=6533) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20100101 (B2508E77-176E-9831-4CD1-B3901BD0BEB3) Firefox/25.0
• Mozilla/5.0 (X11; FreeBSD amd64; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.3; rv:25.0) Gecko/20141005 PaleMoon/25.0.0
• Mozilla/5.0 (Windows NT 5.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows; U; Windows NT 5.1; en-en; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0; WUID=e8ee0eb939f23fceb8d8d62029ec94ae; WTB=2937) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 AlexaToolbar/alxf-2.19
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 ( .NET CLR 3.5.30729)
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20100101 Firefox/25.0.666.1.0.14
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0; WUID=c9de955ae3a89ffe93482abaf4163e87; WTB=592; WUID=c9de955ae3a89ffe93482abaf4163e87; WTB=592; WUID=c9de955ae3a89ffe93482abaf4163e87; WTB=592) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Mozilla/5.0 (Windows NT 6.1) Gecko/20100101 Firefox/25.0; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0; WUID=4b6b94e74021f373fbb7364e7f044b26; WTB=6787) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0,gzip(gfe)
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0; WUID=0195dd9e3a4ff5ab46f9cece17372672; WTB=2938) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130708 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130627 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130712 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130628 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130626 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130630 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20130629 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.4.2
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130714 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; WOW64; rv:25.0) Gecko/20130708 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20130715 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.7.1
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20130630 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130710 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130715 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130710 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130705 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130715 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130715 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20130710 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130630 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.7.1-tr
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130627 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.0; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.7.1
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130709 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130701 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130628 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130716 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130628 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130630 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130629 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20130711 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130702 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20130703 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130705 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130703 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130702 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.7.1
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130711 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130708 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20130626 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:25.0) Gecko/20130626 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.1; rv:25.0) Gecko/20130709 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 YB/7.4.2
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130711 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130627 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130625 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130707 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130625 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20130712 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130629 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:25.0) Gecko/20130706 Firefox/25.0
• Mozilla/5.0 (Windows NT 5.2; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:25.0) Gecko/20130710 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:25.0) Gecko/20130711 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130629 Firefox/25.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:25.0) Gecko/20130626 Firefox/25.0
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:25.0) Gecko/20130707 Firefox/25.0