User Agent String explained :
| Firefox 123.0 | |
|---|---|
| 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 |
| Macintosh | Platform |
| Intel Mac OS X 14_5_8 | Operating System: OS X Version 14_5_8 : running on a Intel CPU |
| rv:123.0 | CVS Branch Tag The version of Gecko being used in the browser |
| Gecko | Gecko engine inside |
| 20100101 | Build Date: the date the browser was built |
| Firefox | Name : Firefox |
| 123.0 | Firefox version |
| First visit: | 2026年01月09日 09:15 |
| Last visit: | 2026年04月14日 03:34 |
All Firefox user agent strings | |