Firefox 139 User Agents

Firefox 139 User Agents in our database. This is a listing of only some of the most popular ones.

• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0

  Firefox 139 on Mac 10

• Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

  Firefox 139 on GNU/Linux

• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:139.0) Gecko/20100101 Firefox/139.0

  Firefox 139 on Windows 10