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Am I the only one who hates these fake PDFs?
(eclecticlight.co)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
Also to your point about not having an issue with Firefox, I read that Firefox recently implemented an XFA reader in their browser but the issue is that most of the javascript is not supported so the functionality of the form is not guaranteed to work.