Fiddler Ideas

The free web debugging proxy for any browser, system or platform.

4 Vote

Fiddler doesn't try kerberos first with negotiate protocol for upstream proxy

I use McAfee Web Gateway proxies that only support Kerberos authentication. When trying to use these devices as an upstream proxy fiddler first tries NTLMSSP and then NTLMSSP2 and then prompts for credentials. It never tries Kerberos in the reques...

Created 28 Apr 08:06pm by Guest

Bug

1 Future consideration
3 Vote

Regression: Fiddler no longer in AppPaths

ShellExecute("Fiddler") no longer works because Fiddler is no longer registered in the APP PATHS registry key. This breaks a 14-year-old mechanism of launching Fiddler. Incidentally, It appears that Fiddler now installs on a per-user basis /by de...

Created 21 Jul 06:25pm by Eric Lawrence

Bug

1 Under review
3 Vote

Fiddler preventing other programs from having internet connectivity

Not sure if this is a recent change, but I use Microsoft Outlook and Skype, and both are having connectivity issues when Fiddler is running. Also Windows 10 apps seem to be unable to have an internet connection as well.

Created 9 Jun 10:02pm by Guest

Bug

4 Under review
3 Vote

Fiddler not working with iOS 10.3 version

We've been using Fiddler to debug both iOS and Android apps for quite a while. Recently, some Apple devices have been automatically updated to version 10.3. Since then, we can't see any feed data in Fiddler. Does anyone else have the same issue? I...

Created 16 Mar 05:37pm by Irina Tim

Bug

7 Under review
3 Vote

Raw response view doesn't show HTTP content if the content length header is wrong.

I was debugging a failing web request and it transpired that the HTTP response headers were corrupted, such that the content length field specified a length longer than the actual content. Hence fiddller was waiting for that extra content, and, a...

Created 3 Feb 01:56pm by Guest

Bug

1 Under review
3 Vote

Raw Inspector assignment ordering bug wrecks performance

The Raw Inspectors try to avoid spewing a bunch of junk into the display if the MIME type is binary. But because of how the assignment happens today, switching sessions can temporarily cause a mixed state where the headers from a new (text) sessio...

Created 23 Jan 10:15pm by Eric Lawrence

Bug

1 Future consideration
3 Vote

Is it possible to search the Scratchpad?

We end up with quite a full scratchpad and it would be extremely useful to be able to search it-- is there something we are missing? Is it searchable? It is a huge handicap to not have this facility.

Created 19 Jan 05:48pm by Christi Koz

Bug

1 Under review
2 Vote

The link in the cookies response indicator fails

This url invalid “Learn more at: http://fiddler2.com/r/?p3pinfo”

Created 7 Nov 11:19am by 王少康

Bug

1 Under review
3 Vote

Get support for host remapping for SNI when using HTTPS

Many sites using SNI to support multiple HTTPS web sites via an IP address, when doing host remapping we always get warning of cert mismatch, but actually the remote server have correct cert installed. If Fiddler can connect remote server with SN...

Created 12 Oct 03:48am by Guest

Bug

3 Under review
3 Vote

Capturing even if option is disabled

I sometimes disable the capturing. This used to always work but now not working with the latest version as of today.

Created 3 Oct 06:30pm by Guest

Bug

1 Under review