"Save As" requested instead of "Save" after digital signature of my PDF

Hi all,
I use Adobe Reader XI.
I have a PDF file configured with a set of fields to be filled in.
One of these fields is a digital signature field.
Everyting is working fine: I can fill the fields and sign the document with my ID card, as you can see below :
The problem I have is that when I sign my document with my digital signature, Adobe request a "Save As". I would like to know if there is a way to only use a "Save" ?
That requirement is very important since we will deploy the solution to more than 5000 users in an environment which is integrated with other tools, and for the whole stuff to work, the users can't change the file name nor file path... In that scenario, you will understand that proposing a "Save As" by default is not the good way to go.
Ciould you please tell me if a solution exists for this ?
Thanks already
Benoît

Never mind, I found the answer.
A matter of setting the Firefox options so that PDF files open in Reader or whatnot rather than prompt to save.

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"Save As" requested instead of "Save" after digital signature of my PDF

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