User Agent 字符串描述 :

FirefoxFirefox 4.2a1pre
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
Windows NT 6.1Operating System:
icon Windows 7
Win64(Win32 for 64-Bit-Windows) API implemented on 64-bit platforms of the Windows architecture - currently AMD64 and IA64
x6464-bit windows version
rv:2.2a1pre CVS Branch Tag
The version of Gecko being used in the browser
Gecko Gecko engine inside
20110323 Build Date:
the date the browser was built
FirefoxName :
Firefox
4.2a1preFirefox version
 
First visit: 2011.03.24 09:09
Last visit:2015.10.06 04:17

All Firefox user agent strings