常用的User-Agent

Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.8.1.6) Gecko/20070914 Firefox/2.0.0.7

Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7

Mozilla/5.0 (Windows; U; Windows NT 6.0; en) AppleWebKit/522.15.5 (KHTML, like Gecko) Version/3.0.3 Safari/522.15.5

Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/103u (KHTML, like Gecko) safari/100

Opera/9.23 (X11; Linux x86_64; U; en)

Opera/9.23 (Windows NT 5.1; U; en)

Mozilla/4.0 (compatible; MSIE 6.1; Windows XP)

Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0)

Mozilla/5.0(iPad; U; CPU iPhone OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B314 Safari/531.21.10

查看浏览器User-Agent的网站，http://whatsmyuseragent.com/

firefox设置UA：
地址栏输入“about:config”，找到“general.useragent.override”，如果没有这一项，则点右键“新建”->“字符串，设置上面的值。