Latest Firefox 4 user agents:

User Agent Platform Device
Mozilla/5.0 (Windows NT 6.2; bo-IN; rv:1.9.0.20) Gecko/8738-04-27 21:32:31.717773 Firefox/4.0 Windows 8 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_7_7; rv:1.9.5.20) Gecko/6413-01-06 16:23:33.417084 Firefox/4.0 Mac 10 Unknown
Mozilla/5.0 (Macintosh; PPC Mac OS X 10_9_0; rv:1.9.2.20) Gecko/7699-09-09 15:50:55.587616 Firefox/4.0 Mac 10 Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:1.9.7.20) Gecko/5082-08-31 04:45:24.486526 Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:1.9.6.20) Gecko/4000-09-11 23:56:47.590492 Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux i686; rv:1.9.5.20) Gecko/8677-07-08 09:52:23.092316 Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (Windows 98; Win 9x 4.90; ks-IN; rv:1.9.2.20) Gecko/2797-02-02 10:58:17.127342 Firefox/4.0 Windows ME Unknown
Mozilla/5.0 (X11; Linux i686; rv:1.9.6.20) Gecko/2141-09-25 23:35:23.470440 Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (Windows NT 5.2; ky-KG; rv:1.9.0.20) Gecko/9810-12-03 06:53:23.649414 Firefox/4.0 Windows Server 2003 Unknown
Mozilla/5.0 (Windows 98; Win 9x 4.90; mhr-RU; rv:1.9.2.20) Gecko/4317-04-09 06:17:43.724548 Firefox/4.0 Windows ME Unknown
Mozilla/5.0 (Windows NT 5.1; gez-ET; rv:1.9.0.20) Gecko/2489-10-31 20:55:35.577087 Firefox/4.0 Windows XP Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:1.9.6.20) Gecko/6407-11-09 22:27:36.163513 Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux i686; rv:1.9.6.20) Gecko/ Firefox/4.0 GNU/Linux Unknown
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:2.0b10) Gecko/20110126 Firefox/4.0b10 Windows 7 Unknown
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_11_4; rv:1.9.2.20) Gecko/9899-10-22 15:17:45.697205 Firefox/4.0 Mac 10 Unknown
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:2.0.1) Gecko/20110606 Firefox/4.0.1 Windows XP Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:2.0.1) Gecko/20110506 Firefox/4.0.1 GNU/Linux Unknown
Mozilla/5.0 (Windows NT 5.1; rv:2.0b13pre) Gecko/20110223 Firefox/4.0b13pre Windows XP Unknown
Mozilla/5.0 (X11; U; Linux i686; ru; rv:1.9.1.3) Gecko/20091020 Ubuntu/10.04 (lucid) Firefox/4.0.1 Ubuntu 10 Unknown
Mozilla/4.0 (compatible; Intel Mac OS X 10.6; rv:2.0b8) Gecko/20100101 Firefox/4.0b8) Mac 10 Unknown