When launching Fiddler "Automatic" Breakpoints are always set to "Disabled".

How can they be enabled to either "Before Responses" or "After Responses by default?

As the question, please help me how to backup settings & restore it in another computer. Thanks.

After starting the program, a subfolder Fiddler2 is created in the Documents folder. Is it possible to adjust its location, move to a higher level in the home folder, for example?

As far as I can see Fiddler stores its settings, scripts and captures in a folder in the C:\User directory.

Now assume I installed Fiddler v5 in a folder like

D:\tools\proxy\Fiddler\

How can I tell Fiddler to store the settings in the future in a subfolder like

D:\tools\proxy\Fiddler\mysettings\

or in a completely different folder like:

D:\tools\projecttest\Fiddlersettings\

I did not found a corresponding option in Fiddler to  re-define this setting folder.
How does this work?

Ben

I am trying to redirect a request as is. The request initially hits server1 and using Fiddler I want to redirect the exact same request to another server (the whole request and body). I am able to successfully resend the request to server2, how ever I see that the request body is coming as 0 bytes (so the application errors out on server2 as expected).

 I basically take all the sessions and filter out and select sessions that have ***.action in their url, by doing this

static function sessionSelector(ss: String):Session{
    var arrSess: Session[] = FiddlerApplication.UI.g.GetAllSessions();

    for (var i:int = 0; i<arrSess.Length; i++)
    {
          var sess: Session = arrSess[i];            
          if(sess.url.Contains(ss)){
return sess;
}
}
return;
}

     Is it possible to white list some sites? Or maybe maybe only display http traffic from one site? like ignore .*youtube.com OR only include .*local.com

I have installed Fiddler, and changed Tools -> Fiddler Options -> Https tab -> and checked "Capture HPPTS Connects" & "Decrypt HTTPS traffic".

While the fiddler is running, if I open any other web site in IE / Chrome, I get an error saying

"Certificate Error: Navigation Blocked"

There is a problem with this website’s security certificate.
The security certificate presented by this website is not secure.
Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.

If close the fiddler, I am able to access all the websites using IE / Chrome. Could you please tell me how to resolve this issue.

I'am trying to catch all traffic by using Fiddler API, but I get only  the 200 code result. I'm interesting in 101 code and websockets info, but I can't get them via API. When I use the UI Fiddler I can see websockets. Have any ideas why it happens?

I'm trying to debug a WPF client that talks to a WCF service, all running in Visual Studio. The service project (that holds the WCF services) is configured to use port 50000, and the WPF client has end points for that in the app.config.

I changed the WPF client to use localhost.fiddler:50000, which shows the requests in Fiddler, but I'd like to filter out everything else, so I only see these requests. However, I can't get the filtering to work.

If I enable filters, and set it to show only localhost.fiddler:50000 and localhost:50000, then when the WPF client makes a request, I see an entry for 
localhost:50000 in Fiddler, but this disappears as soon as the request has completed, so I can't inspect it.

I tried clearing the hosts filter, and telling it to show only intranet hosts, but this didn't show anything.

The weird thing is that if I set it to hide the most common hosts that I don't want (things like Skype, Teams, etc), then I get the same behaviour as above, ie the 
localhost:50000 requests appears briefly, and then disappears. The same happens when I try using a web browser, so it's not just Visual Studio and 
localhost:50000

Anyone know what's going on here? I'm using the latest version of Fidller on Win7 Pro 64-bit, with VS2019.

Please tell me how to realize the function of red box selection in fiddler core programming. Thank you!!!