Password-protected PDF cannot be opened when New PDF Viewer flag is enabled in Microsoft Edge

TERU 20 Reputation points
2025-11-25T05:43:00.0733333+00:00

When I enable the New PDF Viewer feature flag in Microsoft Edge, a password-protected PDF fails to open. The password prompt appears, but after entering the correct password it just prompts again. The same PDF opens correctly in:

  • Microsoft Edge (when the flag is disabled)
  • Other browsers
  • Adobe Acrobat Reader

Please advise whether this appears to be a browser regression or a file-specific issue, and if there is a workaround besides disabling the flag.

Edge version: 142.0.3595.94 (64-bit)

password_is_password.pdf

Microsoft Edge | Read PDFs | Windows 11
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Answer accepted by question author
  1. Alexandr S 100.9K Reputation points Independent Advisor
    2025-11-26T06:22:40.7133333+00:00

    Then the only conclusion is that something is wrong with the PDF file itself password_is_password.pdf

    Most likely, either the password is not "password", or the internal structure of the file is broken.

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3 additional answers

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  1. Alexandr S 100.9K Reputation points Independent Advisor
    2025-11-25T06:39:34.4866667+00:00

    Hello, TERU

    All flags in edge://flags/ - experimental ones. And they can lead to bugs, etc. There is a warning about this on the flags settings page.:

    User's image

    Here's the flag "New PDF Viewer" turned out to have "special features"...

    I recommend that you report the flag bug to the developers via the browser menu "..."->Help and Feedback->Send feedback.


  2. Alexandr S 100.9K Reputation points Independent Advisor
    2025-11-26T03:33:32.3133333+00:00

    You shared the PDF file in the first message.:

    User's image

    I wanted to reproduce the problem, but I don't know the password :) I assumed that the password was "password" (judging by the file name), but it says that the password is incorrect.


  3. Alexandr S 100.9K Reputation points Independent Advisor
    2025-11-26T05:37:57.0233333+00:00

    It's very strange... I created my own PDF file for the test. And I have it open normally with any New PDF Viewer flag. Check on your PC: https://1drv.ms/b/c/fc85730a4b96d589/IQBEX2BHPwzdQa9huJQkG5unAeV1vfb6TQK8IhGGT9gKGII?e=Lgq9WS

    The password is 123456. Write about the result.


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