What were you trying to do that didn't work?

If I do not check the checkbox next to signing certificate and click "Select" I can sign the document

Please provide the package NVR for which the bug is seen:

papers-47.0-6.git5de8d26c.el10.x86_64

How reproducible is this bug?:

always

Steps to reproduce

1. Have ONE certificate in Firefox profile for signing pdf files
2. Open pdf file and choose "Sign Digitally..." from "Document Menu"
3. Un-check the certificate in the "Certificate Required" prompt
4. Hit "Select" button

Expected results

Either the "Select" button is disabled or another window/text appears informing that the certificate was not chosen.

Actual results

I can draw a rectangle for signing and then the document is signed even though I did not choose the certificate.