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Troubleshooting: Some PDFs are not opened by Firefox


When opening some PDFs from the Internet, the Mozilla Firefox browser opens a new window or tab, but fails to display the PDF contents.


This can be due to a malfunction of the mozplugger Firefox component.


Disable mozplugger. Firefox will download the PDF document and open it with a local application (IGEL Linux 5.07.100 or newer):

  1. Go to System > Registry in IGEL Setup.

  2. Use Search Parameter ... to find the parameter

  3. Check Completely disable mozplugger.

  4. Confirm the setting with Apply or OK.

  5. Restart Firefox.

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Please note, these errors can depend on your browser setup.

If this problem persists, please contact our support.