Announcing Fiddler 2.2.9

The Beta version of Fiddler 2.2.9 is now available for download. The update notification's changelist hits the highlights, but there's a ton of new goodies in the new version which I'll be talking about over the next week or so. Beyond a huge crop of architectural and performance improvements, there are tons of bugfixes and some useful new features suggested by the community.

Please download it, try it out, and let me know if you encounter any problems or have any suggestions.



PS: Version 2.2.9 of FiddlerCore, the .NET class library, is also now available for .NET Developers. I'll be writing about this more soon too!

Comments (10)

  1. says:

    Thanks Eric for all the great work you do on Fiddler! Looking forwork to know more about the new goodies that comes with 2.2.9

  2. Stargazer71 says:

    Thank you for maintaining this wonderful program. I look forward to trying it out.

  3. EricLaw [MSFT] says:

    The IE Compat team wins the "First bug reported" game. The 2.2.9 build has bad behavior when an extension bypasses the server and generates a response itself.

    Version is now available to correct this regression.

  4. Thanigainathan says:

    Thanks Eric for the information

  5. bangaloreIT says:

    I was waiting for mozila supported fiddler version..Thanks

  6. All versions of Fiddler since the very first alpha of v1 have worked with Firefox.

  7. Shahnawaz says:

    Thanks for the good work Eric!

    I’m using Fiddler for local ajax debugging. I want Fiddler to capture local web traffic [from http://localhost] by default without any custom settings.



  8. @Shahnawaz: And I want a pony.

    Seriously though, that’s simply not possible because the localhost address is hardcoded to bypass proxies (like Fiddler) by many web clients, including .NET and WinINET/IE.

    In current versions of Fiddler, you can tick the "Use PAC Script" option on the Tools > Fiddler Options > Connections screen to cause Fiddler to register as the proxy using an alternative method that allows for debugging of http://localhost traffic.

  9. says:

    Enabling PAC script seems really nice,  but not sure why it’s PAC script instead of something like (allow capturing localhost traffic) 🙂 Is there any other features will be activated when enabling PAC script?

    I was using two methods before to capture localhost traffic, they are:

    1- By adding a period at the end of localhost (http://localhost.)

    2- By using machine name instead of ( or (http://localhost)

  10. EricLaw [MSFT] says:

    @Firas: Yes, there are other side effects to using a PAC script.

    The "best" way to ensure traffic goes to Fiddler, in general, is to use http://ipv4.fiddler/

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