Edge browser does not connect to Fiddler proxy

3 posts, 0 answers
  1. Aril
    Aril avatar
    1 posts
    Member since:
    Aug 2012

    Posted 01 Nov 2016 Link to this post

    Dear all expert users,

    I work with a web app having a specific issue working with Edge browsers. To inspect what happens, I wanted to monitor and debug with Fiddler, but I just can't make my Edge browser communicate with Fiddler2. My environment looks like this:

    * Microsoft Edge 38.14393.0.0; proxy settings: Automatic
    * Windows 10
    * Fiddler v4.6.3.44034
    * disabled Windows Firewall.

    (1) Browsing in Edge with Fiddler off:
    I can surf about as desired.

    When I now inspect Edge proxy settings, they are set not to use a proxy. This is as expected.

    (2) Starting Fiddler and trying again:

    Any attempts to load a web page makes Edge complain, it can not connect to the proxy server (Fiddler). 

    This time, Edge proxy settings were changed after Edge restart. Now it's set to use for HTTP and HTTPS, as expected. 

    If I try opening another browser session from Fiddler, IE works well and Chrome works well. Only Edge does not connect to the proxy..


    I read other threads on this forum, and found suggestions this might happen because of windows firewall, possibly even some hard coded matter in the firewall. However, as I stated above: My problem persist even with firewall turned on or off. Therefore my conclusion: Edge and Fiddler don't cooperate, and it has not to do with the firewall settings.

    Uless of course, anyone is able to explain to me what happens or how to make things work. (It would typically be some simple setting I have got wrong, for sure.. You'd make me really happy, if you made me understand. :-)




  2. Tsviatko Yovtchev
    Tsviatko Yovtchev avatar
    549 posts

    Posted 09 Nov 2016 Link to this post


    Have you tried the EnableLoopback utility? Normally Edge won't be able to connect to localhost (i.e. and that's how you can configure it to do so. 

    Tsviatko Yovtchev
    Telerik by Progress
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  3. Elliott
    Elliott avatar
    1 posts
    Member since:
    Jan 2019

    Posted 15 Jan Link to this post

    Fiddler > Tools > Win8 Loopback Exemptions > check Microsoft Edge

    That does it.

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