Latest Firefox 51 user agents:

User Agent Platform Device
Mozilla/50.0 (Windows NT 6.1; Win86; x86; rv:90.0) Gecko/20100101 Firefox/51.9 Windows 7 Unknown
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0 FirePHP/0.7.4 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux armv7l; rv:51.0) Gecko/20100101 Firefox/51.0 Ubuntu Unknown
Mozilla/5.0 (X11; U; SunOS sun4v; en-US; rv:1.8.1.3) Gecko/20070321 Firefox/51.0 Solaris Unknown
Mozilla/5.0 (X11; U; SunOS sun4u; de-DE; rv:1.8.1.6) Gecko/20070805 Firefox/51.0 Solaris Unknown
Mozilla/5.0 (X11; U; OpenBSD sparc64; en-AU; rv:1.8.1.6) Gecko/20071225 Firefox/51.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; OpenBSD amd64; en-US; rv:1.8.0.9) Gecko/20070101 Firefox/51.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; NetBSD i386; en-US; rv:1.8.0.5) Gecko/20060818 Firefox/51.0 NetBSD Unknown
Mozilla/5.0 (X11; U; NetBSD alpha; en-US; rv:1.8.1.6) Gecko/20080115 Firefox/51.0 NetBSD Unknown
Mozilla/5.0 (X11; U; Linux x86_64; zh-TW; rv:1.8.1.11) Gecko/20071204 Ubuntu/7.10 (gutsy) Firefox/51.0 Ubuntu 7 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.6) Gecko/20100117 Gentoo Firefox/51.0 Gentoo Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090714 SUSE/3.5.1-1.1 Firefox/51.0.1 SUSE 3 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.7) Gecko/2009030516 Ubuntu/9.04 (jaunty) Firefox/51.0 Ubuntu 9 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.12) Gecko/2009070818 Ubuntu/8.10 (intrepid) Firefox/51.0.1 Ubuntu 8 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1.11) Gecko/20070914 Mandriva/2.0.0.11-1.1mdv2008.0 (2008.0) Firefox/51.0.1 Mandriva 2008 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-GB; rv:1.9.0.5) Gecko/2008122010 Firefox/51.0.1 GNU/Linux Unknown
Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.0.1) Gecko/2008070400 SUSE/3.0.1-0.1 Firefox/51.0 SUSE 3 Unknown
Mozilla/5.0 (X11; U; Linux i686; pt-BR; rv:1.9.0.2) Gecko/2008092313 Ubuntu/8.04 (hardy) Firefox/51.0.1 Ubuntu 8 Unknown
Mozilla/5.0 (X11; U; Linux i686; pl-PL; rv:1.9.0.3) Gecko/2008092700 SUSE/3.0.3-2.2 Firefox/51.0 SUSE 3 Unknown
Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.0.2) Gecko/2008092318 Fedora/3.0.2-1.fc9 Firefox/51.0 Fedora 9 Unknown