User Agent 字符串描述 :

FirefoxFirefox 4.0b12pre
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
Linux i686Operating System:
icon Linux
running on a Intel Pentium Pro CPU
rv:2.0b12pre CVS Branch Tag
The version of Gecko being used in the browser
Gecko Gecko engine inside
20110204 Build Date:
the date the browser was built
FirefoxName :
Firefox
4.0b12preFirefox version
 
First visit: 2011.02.05 01:08
Last visit:2015.09.19 03:11

All Firefox user agent strings