User Agent 字符串描述 :

FirefoxFirefox 3.5.6
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
X11X Window System
a windowing system for bitmap displays
U Security values:
  • N for no security
  • U for strong security
  • I for weak security
Linux x86_64Operating System:
icon Linux
running on a Intel CPU
running on a 64 bit processor
frLanguage Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface)
fr = FrenchFrench
rv:1.9.1.6 CVS Branch Tag
The version of Gecko being used in the browser
Gecko Gecko engine inside
20091215 Build Date:
the date the browser was built
UbuntuUbuntu Linux distribution
9.10Version 9.10
karmicCodename: karmic
FirefoxName :
Firefox
3.5.6Firefox version
 
First visit: 2009.12.20 11:06
Last visit:2015.10.16 04:04

All Firefox user agent strings