ms-browser-extension URL pages are not loading in private mode

By design Issue #16736860


Apr 4, 2018
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Reported by 1 person

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Steps to reproduce

Microsoft Edge in Windows 10 (RS4) is allowing extensions in Private mode
Microsoft EdgeHTML 17.17127
Microsoft Edge 42.17127.1.0
But the pages/tabs loaded from extensions with ms-browser-extension:// are not opening in private mode , HTTP 501 error is thrown. Screenshot attached


Comments and activity

  • Microsoft Edge Team

    Changed Title from “ms-browser-extension URL pages are not loading in private mode” to “ms-browser-extension URL pages are not loading in private mode”

    Changed Status to “By design”

  • Hello,
    For extensions that use InPrivate mode as 'span’, we do not support loading ms-browser-extension URL in InPrivate window. By default this will open in normal window.

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