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 (X11; Ubuntu; Linux x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.1 [ip:5.75.174.146]
• Mozilla/5.0 (Macintosh; PPC Mac OS X 10 10_7; rv:1.9.4.20) Gecko/ Firefox/14.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10 11_9; rv:1.9.6.20) Gecko/ Firefox/14.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.1 [ip:134.209.137.157]
• Mozilla/5.0 (Android 4.4.3; Mobile; rv:14.0) Gecko/14.0 Firefox/14.0
• Mozilla/5.0 (Windows NT 6.0; rv:14.0) Gecko/2017121 Firefox/14.0
• Mozilla/5.0 (Windows NT 6.2; rv:14.0) Gecko/2020817 Firefox/14.0
• Mozilla/5.0 (Windows NT 5.2; rv:14.0) Gecko/201221 Firefox/14.0
• Mozilla/5.0 (Linux x86_64; rv:14.0) Gecko/2014108 Firefox/14.0
• Mozilla/5.0 (Linux x86_64; rv:14.0) Gecko/2018512 Firefox/14.0
• Mozilla/5.0 (Linux x86_64; rv:14.0) Gecko/202038 Firefox/14.0
• Mozilla/5.0 (Windows NT 6.0; am-ET; rv:1.9.1.20) Gecko/2019-08-09 15:43:06 Firefox/14.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.1; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.2; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.9; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.9; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.6; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.7; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.0; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.5; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (X11; Linux i686; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.0; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.4; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.0; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.5; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.9.1; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Windows NT 5.2; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.9; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.3; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.8; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Linux i686; rv:14.0) Gecko/2004328 Firefox/14.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.1; rv:14.0) Gecko/20100101 Firefox/14.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.0; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.2; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.2; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.8; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.5; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.7; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.6.4; rv:14.0) Gecko/20100101 Firefox/14.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.0; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.0; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.5; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.3; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Windows NT 5.1; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.4; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.1; rv:14.0) Gecko/20100101 Firefox/14.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.6; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.3; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Windows NT 6.0; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.4; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.7; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.1; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.4; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.2; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.1; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.7; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.4; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.5; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Windows NT 5.2; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Windows NT 6.1; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.1; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.0; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.9; rv:14.0) Gecko/20100101 Firefox/14.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.8; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.5; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.8; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.9; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.1; rv:14.0) Gecko/20100101 Firefox/14.0.7
• Mozilla/5.0 (Windows NT 6.3; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.4; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Windows NT 6.1; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.9; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.8; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.2; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.9; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Windows NT 6.0; Win64; x64; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.2; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.6; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:14.0) Gecko/20100101 Firefox/14.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.4; rv:14.0) Gecko/20100101 Firefox/14.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.4; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.0; rv:14.0) Gecko/20100101 Firefox/14.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.5; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.9; rv:14.0) Gecko/20100101 Firefox/14.0.0
• Mozilla/5.0 (Windows NT 6.3; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.8; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.6; rv:14.0) Gecko/20100101 Firefox/14.0.5
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:14.0) Gecko/20100101 Firefox/14.0.6
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.7; rv:14.0) Gecko/20100101 Firefox/14.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.5; rv:14.0) Gecko/20100101 Firefox/14.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.4; rv:14.0) Gecko/20100101 Firefox/14.0.1