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.