User Agent String explained :
 Thunderbird 3.1.6 | |
|---|---|
| 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 |
| Windows | Platform |
| U | Security values:
|
| Windows NT 6.1 | Operating System:  Windows 7 |
| de | Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) de =  German |
| rv:1.9.2.12 | CVS Branch Tag The version of Gecko being used in the browser |
| Gecko | Gecko engine inside |
| 20101027 | Build Date: the date the browser was built |
| Lightning | Extension that brings the Sunbird calendar to Thunderbird and SeaMonkey |
| 1.0b2 | Lightning version |
| Thunderbird | Name : Thunderbird |
| 3.1.6 | Thunderbird version |
| Description: | E-mail and news client developed by the Mozilla Foundation |
| First visit: | 2010.11.05 12:24 |
| Last visit: | 2017.01.27 11:55 |
All Thunderbird user agent strings | |