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Firefox needs the ability to save fillable PDFs

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I nice feature to add would be the ability to fill out a PDF in Firefox and then save that PDF and the data that is filled in.

I nice feature to add would be the ability to fill out a PDF in Firefox and then save that PDF and the data that is filled in.

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It works for me on certain forms. For example:

https://www.irs.gov/pub/irs-pdf/f4868.pdf

After filling the form, I use the Download/Save button on the viewer's toolbar:

In case it matters, I have the default setting on the Settings page, in the Applications list:

Portable Document Format (PDF) => Open in Firefox

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