Edge pop-up window: Fiddler, process dump

Download Fiddler from https://www.telerik.com/download/fiddler and install it.

Open Fiddler and go to Tools -> Options -> HTTPS tab. Enable Decrypt HTTPS traffic. You will be prompted to install the Fiddler Root certificate (this step requires elevated permission).

Close Fiddler.

Download and unzip Process Explorer from https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer.

Press Ctrl + Shift + Del in Edge or access edge://settings/clearBrowserData.

• Select All time as the Time range.
• Check Cookies and other site data and Cached images and files.
• Click Clear now and wait until the clear action completed.

Start Fiddler. It should automatically start capturing, and you will see Capturing icon in the lower left corner. If it is not capturing, press F12 to start capturing.

Press Win key + R or right click the Start Menu and choose Run to launch a Run dialog and run the command: msedge.exe <URL> to open Edge with a specific URL. For example, to launch Edge to access https://www.microsoft.com/, you can run msedge.exe https://www.microsoft.com/

Do whatever steps to reproduce the pop-up window in Edge. Once the pop-up window appears, please DO NOT close it and proceed to next step.

Launch procexp.exe as administrator from the location where you unzipped Process Explorer.

Left click and hold the Find Window's Process button and drag it over the pop-up window. Then, release your mouse. Process Explorer will automatically identify and highlight the process that is responsible for the pop-up window.

Right click the highlighted process and select Create Dump from the menu, then choose Create Full Dump... to create a full dump of the process.