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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 71%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E9%3C/text%3E%3C/svg%3E)
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:
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)
Opening and reading PDF files in Microsoft Edge on Windows 11
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 84%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
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.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 32%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPV%3C/text%3E%3C/svg%3E)
Adobe Reader does open this sample file though, using the supplied password of "password".
I wonder if the encryption scheme is invisibly salting it in some way, and the string used for encryption is actually something else, a process Adobe Reader knows about and reverses by inputting the same salt when reversing it.
Or padding paswords with characters <32 in length with spaces, nulls, or something else?
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.:
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.
Thank you for the response.
I am sorry I forgot to include an important detail. Although I enabled the New PDF Viewer flag to reliably reproduce the behavior, I have confirmed the issue also occurs in an environment with default settings (no changes in edge://flags).
I still do not know the root cause of this issue or the exact conditions that trigger it. For now, I am providing some environment details from a system where the problem reproduces.