Latest Firefox 50 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:46.0) Gecko/20100101 Firefox/50.0 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:21.0) Gecko/20130331 Firefox/50.0.2 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:50.0) Gecko/20100101 Firefox/50.0 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:42.0) Gecko/20100101 Firefox/50ED Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux i686 on x86_64; rv:50.0) Gecko/20100101 Firefox/50.0 Ubuntu Unknown
Mozilla/5.0 (X11; Ubuntu; Linux armv7l; rv:50.0) Gecko/20100101 Firefox/50.0 Ubuntu Unknown
Mozilla/5.0 (X11; U; x86_64 Linux; en_US; rv:1.7.12) Gecko/20050915 Firefox/50.0.2 GNU/Linux Unknown
Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.9) Gecko/20071102 Firefox/50.0.1 Solaris Unknown
Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.2) Gecko/20070226 Firefox/50.0.2 Solaris Unknown
Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.8.1.11) Gecko/20080118 Firefox/50.0.1 Solaris Unknown
Mozilla/5.0 (X11; U; SunOS i86pc; en-US; rv:1.9.0.4) Gecko/2008111710 Firefox/50.0.1 Solaris Unknown
Mozilla/5.0 (X11; U; SunOS i86pc; en-US; rv:1.8.1) Gecko/20061211 Firefox/50.0.1 Solaris Unknown
Mozilla/5.0 (X11; U; OpenBSD sparc64; en-US; rv:1.8.1.6) Gecko/20070816 Firefox/50.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; OpenBSD sparc64; en-CA; rv:1.8.0.2) Gecko/20060429 Firefox/50.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; OpenBSD i386; en-US; rv:1.8.1.4) Gecko/20070704 Firefox/50.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; OpenBSD i386; en-US; rv:1.8.0.4) Gecko/20060628 Firefox/50.0 OpenBSD Unknown
Mozilla/5.0 (X11; U; Linux x86_64; it; rv:1.9.1.9) Gecko/20100330 Fedora/3.5.9-2.fc12 Firefox/50.0.2 Fedora 12 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; es-ES; rv:1.9.1.8) Gecko/20100216 Fedora/3.5.8-1.fc11 Firefox/50.0 Fedora 11 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.7) Gecko/20100723 Fedora/3.6.7-1.fc13 Firefox/50.0 Fedora 13 Unknown
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.3) Gecko/20090914 Slackware/13.0_stable Firefox/50.0 Slackware 13 Unknown