Latest Firefox 15 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:15.0) Gecko/20100101 Firefox/15.0.1) Ubuntu Unknown
Mozilla/5.0 (X11; FreeBSD amd64; rv:15.0) Gecko/20100101 Firefox/15.0.1 FreeBSD Unknown
Mozilla/5.0 (PPC; rv:15.0) Gecko/2011730 Firefox/15.0 Mac Unknown
Mozilla/5.0 (PPC; rv:15.0) Gecko/2002124 Firefox/15.0 Mac Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.9; rv:15.5) Gecko/20100101 Firefox/15.5.1 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.9; rv:15.0) Gecko/20100101 Firefox/15.0.0 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.8; rv:15.1) Gecko/20100101 Firefox/15.1.0 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.7; rv:15.4) Gecko/20100101 Firefox/15.4.6 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.4; rv:15.2) Gecko/20100101 Firefox/15.2.8 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.3; rv:15.9) Gecko/20100101 Firefox/15.9.5 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.3; rv:15.5) Gecko/20100101 Firefox/15.5.0 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.2; rv:15.2) Gecko/20100101 Firefox/15.2.5 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5.1; rv:15.2) Gecko/20100101 Firefox/15.2.8 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.7) Gecko/20100101 Firefox/15.7.9 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.6) Gecko/20100101 Firefox/15.6.1 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.5) Gecko/20100101 Firefox/15.5.9 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.4) Gecko/20100101 Firefox/15.4.5 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.3) Gecko/20100101 Firefox/15.3.3 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.3) Gecko/20100101 Firefox/15.3.2 Mac 10 Unknown
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5.9; rv:15.2) Gecko/20100101 Firefox/15.2.3 Mac 10 Unknown