Firefox 66 User Agents

Firefox 66 User Agents in our database. This is a listing of only some of the most popular ones.

• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0

  Firefox 66 on Windows 10

• Mozilla/5.0 (Windows NT 10.0; rv:66.0) Gecko/20100101 Firefox/66.0

  Firefox 66 on Windows 10

• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:66.0) Gecko/20100101 Firefox/66.0

  Firefox 66 on Mac 10

• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:66.0) Gecko/20100101 Firefox/66.0

  Firefox 66 on Mac 10

• Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:66.0) Gecko/20100101 Firefox/66.0

  Firefox 66 on Mac 10