Insecure conection on firefox?

4 posts, 0 answers
  1. Flexagon
    Flexagon avatar
    3 posts
    Member since:
    Mar 2019

    Posted 24 Mar Link to this post

    I never had this issue before, but here's what I did. tools > options > ttps > actions > reset with fiddler, and gave me "Added fiddler's root certificate to Machine Root List". On firefox, I did tools > options > Network settings > Configure Proxy Access to the Internet > user system proxy settings.

    Another thing I tried is exporting the certificate from fiddler, then on firefox, tools > options > certificates > View certificates > import, then importing the fiddlerRoot.cer, but still get insecure connection.

  2. Simeon
    Admin
    Simeon avatar
    216 posts

    Posted 28 Mar Link to this post

    Hello Flexagon,

    Could you please, provide the version of Fiddler you are using. I recommend updating to the latest one.

    If the problem still persists, please, try to reset your Fiddler certificate by following the procedure here. Then, remove the old DO_NOT_TRUST_FiddlerRoot certificate from Firefox as well and import the new one.

    I hope that this procedure will solve your issue as I was not able to reproduce it.

    Regards,
    Simeon
    Progress Telerik
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  3. Flexagon
    Flexagon avatar
    3 posts
    Member since:
    Mar 2019

    Posted 30 Mar in reply to Simeon Link to this post

    I tried doing the things in the post you linked, and firefox is now showing

    Did Not Connect: Potential Security Issue

    Firefox detected a potential security threat and did not continue to www.youtube.com because this website requires a secure connection.

     

    However, it does detect some https connections like from discordapp.com . Is there a way I can manually add the exported certification to firefox?

  4. Simeon
    Admin
    Simeon avatar
    216 posts

    Posted 03 Apr Link to this post

    Hi Flexagon,

    Yes, you can manually add the exported Fiddler root certificate to Firefox.

    1. In Firefox open about:preferences#privacy in a new tab.
    2. Scroll to the bottom and click the View Certificates... button.
    3. In the Certificate Manager window click the Authorities tab.
    4. Click the Import... button and in the Select File containing CA certificate(s) to import file browser navigate to the FiddlerRoot.cer file and open it.
    5. A Downloading Certificate dialog window will appear. Make sure that the Trust this CA to identify websites. checkbox is checked and click the OK button.
    6. Click the OK button in the Certificate Manager window as well.

    Now you should be able to open https://www.youtube.com while Fiddler is capturing HTTPS traffic.

    Regards,
    Simeon
    Progress Telerik
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