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User Agent String explained :

Copy/paste any user agent string in this field and click 'Analyze'
 
FirefoxFirefox 21.0
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
UbuntuUbuntu Linux distribution
Linux x86_64Operating System:
icon Linux
running on a Intel CPU
running on a 64 bit processor
rv:21.0 CVS Branch Tag
The version of Gecko being used in the browser
Gecko Gecko engine inside
20130331 Build Date:
the date the browser was built
FirefoxName :
Firefox
21.0Firefox version
 
First visit: 2013.03.31 07:33
Last visit:2023.09.13 08:03

All Firefox user agent strings



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