Find why IE9 made a web request

Updated on Nov 6, 2025

Add Accept header and Download Initiator columns to Web Sessions List

  1. Enable the Feature Control Key.

    bash
    FEATURE_DOWNLOAD_INITIATOR_HTTP_HEADER
  2. Enter these commands in the QuickExec box:

    bash
    cols add @request.Accept
    cols add @request.X-Download-Initiator
  3. Click Rules > Customize Rules.

  4. Scroll to the static function Main() block , and add the following line within:

    bash
    FiddlerObject.UI.lvSessions.AddBoundColumn("Accept", 50, "@request.Accept");
    FiddlerObject.UI.lvSessions.AddBoundColumn("Reason", 50, "@request.X-Download-Initiator");