在firefox下可以使用livehttpheader外掛程式：
訪問http://www.google.cn/時顯示如下：
http://www.google.cn/
GET / HTTP/1.1
Host: www.google.cn
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14
Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: zh-cn,zh;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: gb2312,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Cookie: PREF=ID=a06b853689d0ad12:NW=1:TM=1185257554:LM=1201838344:S=z2-9msrNmQ2Z7vaO; NID=5=Cj3ufb0KTHPrJ2UiZUSeTCmLhPxmUTzN1RfH21PB3upUW8SK-5A2tmUlR-KZLA7ByxyCs18zOAW_mZavImJt2R_FkPQ10M7e82wupm_RWiYd9hxqEgzaJkxuRaEpoa8f; SID=DQAAAHoAAAADwpz5kqtcEuK9tX_Hv-hEjl5Rd8hGEZhPXKN3oW6iOmvE1XnDEd3Eo6kd6uYEZb4iQdGUE-YUF0oGr8CTdAivygtnA4Fr3Q8KuPehuDMLWXHGf6cmxus1dC3fmwZgGFncIKu0pc8BZlICZ80el5uu-xhKR2cXbUvykqZoatfsVA
HTTP/1.x 200 OK
Cache-Control: private
Content-Type: text/html; charset=UTF-8
Content-Encoding: gzip
Server: gws
Date: Thu, 24 Apr 2008 12:26:34 GMT
Transfer-Encoding: chunked
X-Google-Netmon-Label: /bns/bg/babysitter/proxygfe/proxygfe/0/64
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