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 6.1; rv:10.0) Gecko/20021016 Firefox/10.0
• Mozilla/5.0 (Android 4.0; Mobile; rv:10.0) Gecko/10.0 Firefox/10.0
• Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/10.0
• Mozilla/5.0 (Linux x86_64; rv:10.0) Gecko/2004730 Firefox/10.0
• Mozilla/5.0 (Windows NT 6.2; ti-ET; rv:1.9.2.20) Gecko/2011-11-21 17:32:25 Firefox/10.0
• Mozilla/5.0 (Windows NT 5.1; ne-NP; rv:1.9.1.20) Gecko/2018-01-19 03:29:03 Firefox/10.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.5; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.7; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.0; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Windows NT 5.2; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Windows NT 6.0; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.1; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.4; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.4; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.9; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.9; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.1; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.0; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.1; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.5; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Windows NT 5.2; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.8; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.6; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Windows NT 6.1; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.8; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.4; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.9; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.5; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Windows NT 5.1; rv:10.0) Gecko/2010630 Firefox/10.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.3; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Windows NT 5.2; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.9; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.6; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.8; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.6; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.3; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.5; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Windows NT 6.1; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Windows NT 5.0; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.3; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.9; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.0; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.0; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.8; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (X11; Linux i686; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.9; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.7; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.5; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.4; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.10.9; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.0; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.2; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Windows NT 5.1; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Windows NT 6.2; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Windows NT 5.0; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Windows NT 5.1; rv:10.0) Gecko/20100101 Firefox/10.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.0; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.0; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.3; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.6; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.1; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.6; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.8; rv:10.0) Gecko/20100101 Firefox/10.0.3
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.8.5; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.3; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.1; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.4; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.8; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.2; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.0; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.3; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Windows NT 5.2; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.9; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.7; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.0; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.5; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.2; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Windows NT 5.0; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.1; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Windows NT 5.1; WOW64; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Windows NT 6.0; rv:10.0) Gecko/20100101 Firefox/10.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.6; rv:10.0) Gecko/20100101 Firefox/10.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.4; rv:10.0) Gecko/20100101 Firefox/10.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.2; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.4; rv:10.0) Gecko/20100101 Firefox/10.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.7; rv:10.0) Gecko/20100101 Firefox/10.0.4
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.0; rv:10.0) Gecko/20100101 Firefox/10.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.2; rv:10.0) Gecko/20100101 Firefox/10.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.8; rv:10.0) Gecko/20100101 Firefox/10.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; rv:10.0) Gecko/20100101 Firefox/10.0.4