User Agent String explained :
 Firefox 4.0.1 | |
|---|---|
| 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 i686 | Operating System:  Linuxrunning on a Intel Pentium Pro CPU |
| ru | Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) ru =  Russian |
| rv:1.9.1.3 | CVS Branch Tag The version of Gecko being used in the browser |
| Gecko | Gecko engine inside |
| 20091020 | Build Date: the date the browser was built |
| Ubuntu | Ubuntu Linux distribution |
| 10.04 | Version 10.04 |
| lucid | Codename: lucid |
| Firefox | Name : Firefox |
| 4.0.1 | Firefox version |
| First visit: | 2012.04.05 08:24 |
| Last visit: | 2023.03.19 04:06 |
All Firefox user agent strings | |