Release date:
2025-05-27
Latest Firefox 139 user agents:
| User Agent | Platform | Device |
|---|---|---|
| Mozilla/5.0 (Windows NT 10.0; WOW64; rv:139.0esr) Gecko/20100101 Firefox/139.0esr | Windows 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_5_1; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_5_8; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_4_5; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (X11; Ubuntu; Linux i386; rv:139.0) Gecko/20100101 Firefox/139.0 | Ubuntu | Unknown |
| Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0.1 | Windows 10 | Unknown |
| Mozilla/5.0 (Windows NT 6.2; WOW64; x64; rv:139.0) Gecko/20100101 Firefox/139.0 | Windows 8 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 11_3; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 11 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 10 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 11.6; rv:139.0) Gecko/20110101 Firefox/139.0 | Mac 11 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 12_0_1; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac 12 | Unknown |
| Mozilla/5.0 (X11; Linux x86_64; en-US; rv:139.0esr) Gecko/20170914 Firefox/139.0esr | GNU/Linux | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 14.2; rv:139.0) Gecko/20010101 Firefox/139.0 | Mac 14 | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 14; rv:139.0) Gecko/20100101 Firefox/139.0 | Mac | Unknown |
| Mozilla/5.0 (Windows NT 10.0; WOW64; x64; rv:139.0) Gecko/20100101 Firefox/139.0 | Windows 10 | Unknown |
| Mozilla/5.0 (Wayland like X11; Linux; rv:139.0) Gecko/20170309 Firefox/139.0 | GNU/Linux | Unknown |
| Mozilla/5.0 (Macintosh; Intel Mac OS X 11; rv:139.0) Gecko/20000101 Firefox/139.0 | Mac | Unknown |
| Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0 MihaiCaradan/1.0 | Windows 10 | Unknown |
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