Signature field not visible in browser

Trying to create a fillable form which has a signature field that recepients must sign before submitting. However, for some recipients (who may not have Acrobat reader installed) , the PDF opens in their web browser by default. In the web browser, the signature field does not work. So my question is is there anything I can do to make it so the signature field is operational in any browser? or is their a way to make it so that it does not open in a browser, but promps them to download acrobat reader to open the form.