The built-in PDF viewer introduced with Mozilla Firefox and Google Chrome do not support XFA-based PDF forms. Therefore, XFA-based PDF forms do not open in later versions of Firefox and Chrome.
To use XFA-based PDF forms on Firefox and Chrome, perform the following steps to configure Firefox and Chrome to open PDFs using Adobe Reader or Adobe Acrobat.
Ensure that you have Adobe Reader or Adobe Acrobat installed on your machine.
For more information, see Adobe PDF plug-in documentation by Google.