If the form is saved to desktop or opened in IE, we are not seeing any issues. However, when clicking on the submit by email button in in FireFox 25.0.1, a pop-up appears to choose the default email program or a web email program. We use Outlook and it is set by default. After checking the Outlook option, the form freezes for about a minute and the email window with the PDF attached never appears.
I'm using the built-in Submit By Email button in Livecycle Designer 9.