I asked this question but got logged out and can't get back in but need to ask additional Q... https://security.stackexchange.com/questions/131165/how-can-i-see-mobile-version-websites-on-pc-mac-while-using-a-privacy-secure-bro

I tried the user agent string as explained in the answer, but it didn't work, so I'd like to know what I am doing wrong? I change the useragent to exactly what's in the answer and hit "enter" and go to youtube, right? My youtube still displays as desktop. I'm on a Mac. Thanks.

  • You can ask a Mod to merge your two accounts.
    – AstroDan
    Commented Jul 28, 2016 at 17:46
  • Are you using Tor Browser? Privoxy?
    – Aria
    Commented Jul 28, 2016 at 19:54
  • I think this question may be more suited for Tor website.
    – WhiteWinterWolf
    Commented Jul 28, 2016 at 21:49
  • 1
    Duplicate of tor.stackexchange.com/questions/12221/…
    – cacahuatl
    Commented Jul 29, 2016 at 18:02

2 Answers 2


Type about:config in the address bar. Hit enter.
Search for privacy.resistFingerprinting and disable it.
Now you can set the useragent by creating a new String entry general.useragent.override

Read more: https://trac.torproject.org/projects/tor/ticket/26146


Two potential solutions (I'm sure there are others).

1.) If you want to maximize your privacy you could simply use tor "as-is" and go to a website which will show you a mobile version of a site. For example: http://ready.mobi/

2.) You could also increase your privacy risk and change the Tor user agent setting itself:

   Open the Tor Browser and go to the url about:config
   Say Yes you'll be careful
   Search for useragent
   Change general.useragent.override to the value of your choice

Note: If you are the only Tor browser with a specific user agent you'll be pretty easy to identify but it all depends on what you are doing.

Additional Note: You may want to clear your cookies. If the first time you've visited a site it set a cookie regarding your screen size that may be part of what is affecting your user experience.

I just successfully did this on OSX 10.10.5 using Tor Browser 45.2.0 changing the Tor user agent string from

Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Firefox/45.0



and was able to view YouTube as a mobile browser.

User Agent String Reference: http://www.enterpriseios.com/wiki/Complete_List_of_iOS_User_Agent_Strings

Website to see your User Agent string remotely once you change it. http://www.whatsmyua.com/

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