User Agent String explained :
 Firefox 3.6.20 | |
|---|---|
| Mozilla | MozillaProductSlice. 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 |
| 5.0 | Mozilla version |
| X11 | X Window System a windowing system for bitmap displays |
| U | Security values:
|
| Linux x86_64 | Operating System:  Linuxrunning on a Intel CPU running on a 64 bit processor |
| en-US | Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) en-US =  English - United States |
| rv:1.9.2.20 | CVS Branch Tag The version of Gecko being used in the browser |
| Gecko | Gecko engine inside |
| 20110804 | Build Date: the date the browser was built |
| Red Hat | Red Hat Linux distribution |
| 3.6-2.el5 | Package file version number : 3.6 Package revision number : 2.el5 |
| Firefox | Name : Firefox |
| 3.6.20 | Firefox version |
| First visit: | 2011.08.23 04:21 |
| Last visit: | 2019.07.09 10:29 |
All Firefox user agent strings | |