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; PPC Mac OS X 10 10_6; rv:1.9.4.20) Gecko/ Firefox/9.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10 5_1; rv:1.9.4.20) Gecko/ Firefox/9.0
• Mozilla/5.0 (Linux x86_64; rv:9.0) Gecko/20061130 Firefox/9.0
• Mozilla/5.0 (Linux i686; rv:9.0) Gecko/2004524 Firefox/9.0
• Mozilla/5.0 (Windows NT 5.0; fy-NL; rv:1.9.0.20) Gecko/2021-07-26 05:29:28 Firefox/9.0
• Mozilla/5.0 (Linux i686; rv:9.0) Gecko/20151018 Firefox/9.0
• Mozilla/5.0 (Windows NT 6.1; rv:9.0) Gecko/20171218 Firefox/9.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.6; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.8; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.0; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.9; rv:9.0) Gecko/20100101 Firefox/9.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.1; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.0; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.6; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.6; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.5; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.0; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.8; rv:9.0) Gecko/20100101 Firefox/9.0.2
• Mozilla/5.0 (Windows NT 6.2; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Windows NT 5.0; WOW64; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.9; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.2; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.8; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.5; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.1; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Linux i686; rv:9.0) Gecko/2016912 Firefox/9.0
• Mozilla/5.0 (Linux x86_64; rv:9.0) Gecko/2009214 Firefox/9.0
• Mozilla/5.0 (Linux x86_64; rv:9.0) Gecko/20061030 Firefox/9.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.8; rv:9.0) Gecko/20100101 Firefox/9.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.8; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.2; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.0; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.0; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.4; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Windows NT 6.1; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.1; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Windows NT 5.1; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Windows NT 5.1; WOW64; rv:9.0) Gecko/20100101 Firefox/9.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.2; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Windows NT 6.3; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.7; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.1; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.2; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.8; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.5; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.2; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.0; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.9; rv:9.0) Gecko/20100101 Firefox/9.0.2
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.2; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.0; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Windows NT 6.2; rv:9.0) Gecko/20100101 Firefox/9.0.3
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.9; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.6; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Windows NT 6.0; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.5; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.4; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.4; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.9.0; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Windows NT 6.1; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.4; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Windows NT 5.2; WOW64; rv:9.0) Gecko/20100101 Firefox/9.0.3
• Mozilla/5.0 (Windows NT 6.3; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.2; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (X11; Linux i686; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.8; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.1; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6.1; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.1; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.7; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Windows NT 6.0; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.5; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Windows NT 5.0; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.2; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.7; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.3; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.6; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.4; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Windows NT 6.0; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Windows NT 5.2; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.3; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.9; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Windows NT 5.1; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.4
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.0; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.6; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10.6; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5.7; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.7.2; rv:9.0) Gecko/20100101 Firefox/9.0.0
• Mozilla/5.0 (Windows NT 5.0; WOW64; rv:9.0) Gecko/20100101 Firefox/9.0.2
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8.1; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.10.3; rv:9.0) Gecko/20100101 Firefox/9.0.7
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9.2; rv:9.0) Gecko/20100101 Firefox/9.0.9
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; rv:9.0) Gecko/20100101 Firefox/9.0.5
• Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:9.0) Gecko/20100101 Firefox/9.0.6
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6.8; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.8.2; rv:9.0) Gecko/20100101 Firefox/9.0.1
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7.2; rv:9.0) Gecko/20100101 Firefox/9.0.8
• Mozilla/5.0 (X11; Linux i686; rv:9.0) Gecko/20100101 Firefox/9.0.1