Opening a FDF file opens in browser and redownloads fdf file.

Hello!

I hope you are doing well, and thanks for sharing additional details.

Please ensure you have the latest version of Acrobat installed on the machine: 25.001.20474 (Win) |, Apr 28, 2025. Check for any pending updates from the Menu > help > check for updates, install the updates, restart the app and the machine, and try again.

FDF files are meant to open in Adobe Acrobat or Acrobat Reader and pull data into a linked PDF only if Adobe is handling the file directly. If the FDF is opened via a browser, the browser intercepts the call and cannot properly render the data-PDF connection, leading to unexpected behavior (like reopening or re-downloading the file).

Force FDF to Open in Acrobat Reader (Not Browser):

• Right-click the .fdf file.

• Select Open with > Choose another app.

• Choose Adobe Acrobat Reader and check Always use this app.

• Do not open .fdf files directly from the browser (e.g., Edge or Chrome downloads bar).

Confirm File Association (Windows):

• Go to Settings > Apps > Default Apps > Choose defaults by file type.

• Scroll to .fdf and set Adobe Acrobat Reader as the default app.

Ensure the Web PDF is Accessible:

• Confirm that the PDF URL is publicly accessible and not behind authentication or redirection. Acrobat cannot fetch a file requiring login.

You may also refer to these articles and try the suggestions: https://adobe.ly/4iYrv8F

https://adobe.ly/4dhOfPS

Let us know how it goes.

Thanks,

Anand Sri.