What is the current user-agent string(s) of the Tor browser?
What user-agent strings has the Tor browser (and older Tor software) used in the past?


Tor browser user-agent strings at this point in time Dec-31-2014 for the current version is:

Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Firefox/31.0

In the past Tor browser has used many different user-agent strings, depending on which version of Tor browser you are interested in, one can search for that particular user-agent string.

  • 1
    Where can I search for the user-agent strings? – user194 Dec 31 '14 at 23:38
  • 2
    @user194 Dear user194, You should run the version of Tor browser you are interested in, and while runing it use the following site to analyze it for you. Not only you obtain the user-agent, but also a lot more information about Tor browser. ip-check.info/?lang=en Warm Regards, – Roya Jan 1 '15 at 0:12

The current (2019-09-19) user-agent of Tor is

Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0

Source: https://blog.torproject.org/browser-fingerprinting-introduction-and-challenges-ahead

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