Latest Firefox 121 user agents:

User Agent Platform Device
Mozilla/5.0 (Windows NT 7.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0 Windows NT Unknown
Mozilla/5.0 (X11; Java ME; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
Mozilla/5.0 (X11; MTK / Nucleus; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 MTK / Nucleus Unknown
Mozilla/5.0 (X11; BrightSignOS; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
Mozilla/5.0 (AmigaOS; rv:121.0) Gecko/20100101 Firefox/121.0 AmigaOS Unknown
Mozilla/5.0 (X11; KreaTV; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Gentoo; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 Gentoo Unknown
Mozilla/5.0 (X11; OpenBSD; amd64; rv:121.0) Gecko/20100101 Firefox/121.0 OpenBSD Unknown
Mozilla/5.0 (X11; Azure Linux; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
121.0) Gecko/20251008 Firefox/121.0 Unknown Unknown
Mozilla/5.0 (X11; PICO OS; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
121.0) Gecko/20251025 Firefox/121.0 Unknown Unknown
121.0) Gecko/20230319 Firefox/121.0 Unknown Unknown
121.0) Gecko/20250530 Firefox/121.0 Unknown Unknown
121.0) Gecko/20230906 Firefox/121.0 Unknown Unknown
Mozilla/5.0 (X11; Mageia; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 Mageia Unknown
Mozilla/5.0 (X11; KIN OS; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 GNU/Linux Unknown
Mozilla/5.0 (Nintendo Switch; WifiWebAuthApplet; rv:121.0) Gecko/20100101 Firefox/121.0 Nintendo Switch Switch
Mozilla/5.0 (X11; Arch Linux; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0 Arch Linux Unknown