Latest Firefox 138 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:138.0) Gecko/20211211 Firefox/138.0 Ubuntu Unknown
Mozilla/5.0 (X11; NetBSD x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 NetBSD Unknown
Mozilla/5.0 (X11; Linux; rv:138.0) Gecko/138.0 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0esr) Gecko/20211300 Firefox/138.0esr GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0esr) Gecko/20211300 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0esr) Gecko/20162911 Firefox/138.0esr GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20221100 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0.1-1 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0.1 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 XTPT/1.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 LibreWolf/138.0.1-1 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 LibreWolf/138.0.1 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 LibreWolf/138.0-2 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0 LibreWolf/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20100101 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux i686; rv:138.0) Gecko/20211610 Firefox/138.0 GNU/Linux Unknown
Mozilla/5.0 (X11; Linux i686; rv:138.0) Gecko/20100101 Firefox/138.0.1 GNU/Linux Unknown