User Agent 字符串描述 :

FirefoxFirefox 3.0.17
MozillaMozillaProductSlice. Claims to be a Mozilla based user agent, which is only true for Gecko browsers like Firefox and Netscape. For all other user agents it means 'Mozilla-compatible'. In modern browsers, this is only used for historical reasons. It has no real meaning anymore
5.0Mozilla version
Macintosh Platform
U Security values:
  • N for no security
  • U for strong security
  • I for weak security
Intel Mac OS X 10.5Operating System:
OS X
Version 10.5 : Leopard
running on a Intel CPU
en-USLanguage Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface)
en-US = English - United StatesEnglish - United States
rv:1.9.0.10 CVS Branch Tag
The version of Gecko being used in the browser
Gecko Gecko engine inside
2009122115 Build Date:
the date the browser was built
FirefoxName :
Firefox
3.0.17Firefox version
 
First visit: 2010.07.31 08:13
Last visit:2015.10.04 07:23

All Firefox user agent strings