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_11; rv:45.0) Gecko/20100101 Firefox/45.0@274ba16e-23d3-4e7a-9ba3-43789deaa39c
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Chrome/45.0
• Mozilla/5.0 (X11; Intruder; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 203.10.99.165
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 118.99.81.186
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 49.206.60.158
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.114
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.140
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 212.186.222.98
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 175.101.108.88
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 15.188.176.44
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 165.225.9.92
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 136.226.51.82
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 180.252.172.179
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 TO-Browser/TOB7.45.0.113_04
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 43.225.65.83
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 121.99.203.46
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 41.104.64.184
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.138
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 41.111.90.17
• Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 75.174.197.95
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 41.107.21.94
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 201.137.164.174
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 185.171.126.85
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 209.210.178.150
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 94.140.163.189
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 111.68.24.179
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 95.189.205.10
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 177.94.213.126
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.143
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 69.165.194.89
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 173.235.243.155
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 84.247.49.12
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 84.51.126.66
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 202.80.233.53
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 92.117.116.169
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 84.247.59.10
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 217.74.99.200
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 41.111.105.175
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 89.161.20.68
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.112
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 182.253.131.137
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 61.8.75.43
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 79.233.15.56
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 69.76.44.28
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 114.142.169.33
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 173.81.48.165
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 172.13.118.168
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 31.37.0.231
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 98.113.50.129
• Mozilla/5.0 (Android 8.1.0; Mobile; rv:45.0) Gecko/45.0 Firefox/45.0
• Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.03939595
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 42.115.238.32
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 177.76.212.117
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 125.237.151.231
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 37.214.55.52
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:45.0) Gecko/45.0 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 85.99.182.255
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 103.138.75.136
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 85.33.54.136
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 190.237.10.95
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 84.184.228.179
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 93.148.95.23
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 165.225.76.243
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 93.241.4.194
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 62.72.67.132
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 3.137.220.164
• Mozilla/5.0 (Android 5.0.1; Tablet; rv:45.0) Gecko/45.0 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 45.129.32.11
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 190.232.137.27
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 213.211.48.131
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 69.163.43.114
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 119.237.76.52
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 200.48.136.7
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 87.19.207.66
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 217.138.212.194
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 211.72.129.103
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 114.24.70.95
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 84.25.187.61
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 73.166.54.187
• Mozilla/5.0 (Mobile; OPENC; rv:45.0) Gecko/45.0 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 114.24.142.245
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 200.48.121.82
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 202.175.110.18
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 85.94.115.28
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 82.59.157.137
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 12.1.81.106
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 50.7.159.34
• Mozilla/5.0 (Windows NT 5.1; rv:45.0; WUID=c921d4cadcab6822688c53e1939b6dc1; WTB=6787) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 223.239.50.180
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 37.120.154.98
• Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 66.249.79.154
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 212.204.125.66
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 78.199.152.129
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 190.237.90.45
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) Gecko/20100101 Firefox/45.0
• Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0; on behalf of 173.235.217.54